FORM 2
THE PATENTS ACT, 1970
(Act 39 of 1970)
COMPLETE SPECIFICATION
(See Section 10; Rule 13)
Title: “A Glycol based antifreeze liquid composition for
combustion engines, electric vehicles, industrial and submersible motors”
Applicants: Glaceon Chemicals Pvt. Ltd.
Address: Survey no. 203, Village: Indrad, Near Kamla Amrut
Industrial Park (Rajpur), Taluka: Kadi, Dist: Mehsana-384440, Gujarat, India.
Nationality: An Indian Company
The following specification describes the nature of the invention and the manner in which it is to be performed:

FIELD OF THE INVENTION
The present invention relates to a Glycol based antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors. More particularly, the present invention relates to a Glycol based corrosion-inhibited antifreeze liquid composition, the said liquid composition comprises glycols, deionized water, alkali molybdate, alkali metal octoate or neodecanoate, rare-metal octoate or neodecanoate, dyes. The liquid composition of the present invention is environment-friendly, ready to use composition that will improve efficiency of combustion engines, industrial and submersible motors to the great extent and also provides excellent corrosion protection to the internal parts of the cooling system of combustion engines, electric vehicles and industrial and submersible motors.
BACKGROUND OF THE INVENTION
Cooling systems of combustion engines, electric vehicles, industrial and submersible motors contain a variety of metals, including copper, solder (especially high lead solder), brass, steel, cast iron, aluminum, magnesium, and their alloys. The possibility of corrosive attack on such metals is high, due to the presence of various ions, as well as the high temperatures, pressures, and flow rates found in such cooling systems. The presence of corrosion products within the cooling system can interfere with heat transfer from the engine combustion chambers, which may subsequently cause scaling on wall of engine as well as pumping issue which results into engine overheating and engine component failure due to excess metal temperatures.
Due to limited availability as natural resource and the use of fossil fuels at their great extent, there is a trend towards improved fuel economy for automobiles and industrial engines which has led to the increased use of lightweight materials, such as aluminum and magnesium alloys, for cooling system components of combustion engines, pumps and motors, the desire to inhibit or substantially eliminate the corrosion of these particular metal substrates has become an important objective of those skilled in the art.
Typically, coolant compositions are specifically formulated with ethylene glycols or propylene glycol or high boiling point alcohol or their derivatives. They also contain specific additives that inhibit corrosion of various metals used in the making of the coolant systems. Specific coolant formulations are desirable with the advent of the high-performance engines, particularly aluminum engines and heavy-duty

diesel engines. The coolant flowing through these engines come in contact with a variety of materials and need typical additives to impart specific benefits like providing protection for one or many of the materials selected to make the engine and its attendant coolant system.
Further, it has also been found that pitting and crevice corrosion are particularly prevalent in aluminum-containing cooling systems. Pitting of thin-walled automobile radiator tubes may lead to tube perforation; crevice corrosion at cylinder head packings or coolant hose connections may also occur. Both types of corrosion may lead to eventual coolant loss, with subsequent engine overheating and component failure. Other forms of localized corrosion, such as deposit attack from deposition of corrosion products, may also result. Many conventional corrosion inhibitor additives used in cooling systems of combustion engine, industrial and submersible motors, do not provide adequate protection against the pitting, crevice, and deposit attack corrosion phenomena found with aluminum and various other metal alloys, such as high lead solder. Also, conventional coolant contains water which has tendency to get evaporated at water boiling point in this case coolant losses water and inhibitor which ultimately turns into concentrated and precipitated coolant and causes scaling on wall and reduces heat transfer. The overheating of coolant causes vapour in pumping system which causes pitting in pump and reduces pumping capacity that will have great negative effect on performance of cooling systems.
Also, it is observed that the present practice of use of oil as a lubricating medium or electric insulation has drawbacks of oil water emulsion in case of leak of seal which causes problems in the internal parts of motor and affect the life of the motor.
The corrosion inhibitors which serve as anticorrosion component are known in the art. Antifreeze compositions containing carboxylic acids, molybdate or triazoles are known from EP-B 552 988 or US Pat. No. 4,561,990.
EP-B 229 440 describes a corrosion inhibiting component of an aliphatic monobasic acid, a dibasic hydrocarbon acid and a hydrocarbyl triazole.
Special acids as corrosion protection component are described in EP-B 479 470. Quaternized imidazoles are disclosed in DE-A 196 05 509.

From WO 2014/124826 antifreeze agents and their concentrates are known, which cause only a very low corrosion of aluminum materials, especially those which have been prepared using a soldering process with a Fluoroaluminat-flux. In particular, the technically commonly used sebacic acid is used here as a corrosion inhibitor. A disadvantage of the use of sebacic acid in antifreeze is their low solubility in the typical media (in water at 20 ° C only about 1 g / l) and their difficult production. The achieved with the previously known mixtures and concentrates corrosion protection and the achievable freezing points are generally good. Nevertheless, there is a constant need for improved antifreeze / anticorrosive concentrates, in particular to substitutes for sebacic acid with a similarly good anticorrosive effect, which have a higher solubility in antifreeze due to the ever-increasing performance of new internal combustion engines.
Diglycolic acid has long been commercially available (see, eg, WM Bruner et al., Industrial and Engineering Chemistry, Aug. 1, 1949, pages 1653-1656) and is prepared according to AA Roscher et al., The Bulletin Society of Pharmacological and Environmental Pathologists, Vol. III, No. 4, December 1975 used as a cleaning component for cooling systems in automobiles and as a complexing agent for calcium and iron. A disadvantage of diglycolic acid is according to A. A. Roscher et al. its toxicity. The object of the present invention is to provide such antifreeze / anticorrosive concentrates, which do not have the disadvantages of the prior art, or at least in a reduced form. These mixtures should have a balance between the properties of corrosion protection, heat transfer and frost resistance.
US9598624B2 has disclosed a heat transfer fluid additive composition comprising: greater than or equal to 10 weight percent (wt %) of a carboxylic acid, based on the total weight of the composition; an azole compound; and a base, wherein the base is present in an amount sufficient to obtain a pH 8-10.5 when diluted by 50 volume % with water. The heat transfer fluid additive composition can be combined with other components to form a heat transfer fluid. The heat transfer fluid can be used in a heat transfer system.
In many parts of the world, there is limited access to water suitable for use in cooling systems. Hard water contains a number of minerals, most notably calcium, magnesium and iron salts. These minerals contribute to loss of cooling efficiency and reduce the life span of the coolant composition. This loss is particularly harsh on heavy duty engines, or industrial pumps and motors. An ineffective coolant composition can

shorten engine life by reduction in the diameter of the heat scavenging passage due to deposition of minerals to cylinder liner pitting and water pump cavitations leading to costly engine overhauls.
Thus, in light of the above-described problems, there is a continuing need for advancements in the coolant compositions and improved methods for reducing corrosion associated with cooling compositions. There is a demand of providing a ready to use, easy to use, industry & economically viable and environment friendly Glycol based corrosion-inhibited antifreeze liquid composition for combustion engines, industrial and submersible motors. Applicant has found that the proposed Glycol based corrosion-inhibited antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors improves efficiency of combustion engines, industrial and submersible motors to the great extent and also provides excellent corrosion protection to the internal parts of the cooling system of combustion engines, electric vehicles, industrial and submersible motors.
OBJECTS OF THE INVENTION
Accordingly, the main object of the present invention is to overcome the problems faced by the prior art technologies on corrosion-inhibited antifreeze liquid compositions.
There is an object of the present invention to provide ready to use, easy to use, industry & economically viable and environment friendly Glycol based antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors.
It is also an object to provide a Glycol based corrosion-inhibited antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors that improves efficiency of combustion engines, industrial and submersible motors.
It is yet an object to provide a Glycol based corrosion-inhibited antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors that provides excellent corrosion protection to the internal parts of the cooling system of combustion engines, industrial and submersible motors.
Still there is an object to provide Glycol based corrosion-inhibited antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors, the said liquid composition

comprises glycols, deionized water, alkali molybdate, alkali metal octoate or neodecanoate, rare-metal octoate or neodecanoate, dyes.
There is also an object to provide a process for the preparation of a Glycol based corrosion-inhibited antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors.
BRIEF DESCRIPTION OF DRAWINGS
The invention is further described by way of example with reference to the annexed drawings, in which Figure 1 to 3 are described as follows.
Figure-1: Parts of submersible motor after having filled with
liquid composition of the present invention for 3 months
Figure-2: Parts of submersible motor after having filled with
commercially available coolant for 3 months
Figure-3: Parts of submersible motor after having filled with
conventional water for 3 months
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a Glycol based antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors.
More particularly, the present invention relates to a Glycol based corrosion-inhibited antifreeze liquid composition, the said liquid composition comprises glycols, deionized water, alkali molybdate, alkali metal octoate or neodecanoate, rare-metal octoate or neodecanoate, dyes.
It is to be noted that conventional coolant contains water which has tendency to get evaporated at water boiling point in this case coolant losses water and inhibitor which ultimately turns into concentrated and precipitated coolant and causes scaling on wall and reduces heat transfer. The overheating of coolant causes vapour in pumping system which causes pitting in pump as well as reduces pumping capacity which ultimately causes vicious circle of overheating of engine. To avoid such drawback, the said present invention is proposed to be used with less water so loss of liquid in system is minimal. The high boiling point liquid composition does not allow vapour formation in cooling system hence pumping capacity remains constant and so heat transfer capacity remains at its maximum capacity too.

According to the first embodiment, there is provided a Glycol based antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors.
Glycol based corrosion-inhibited antifreeze liquid composition
comprises:
Mono ethylene glycol (MEG), diethylene glycol (DEG), Propylene glycol,
Alkali Molybdate, alkali metal octoate or neodecanoate, rare-metal
octoate or neodecanoate, deionized water and dyes.
Mono ethylene glycol (MEG) or propylene glycol is used in a ratio between
80-90 % w/w,
Diethylene glycol (DEG) is used in a ratio between 0-6% w/w,
Alkali Molybdate is used in a ratio between 0.08 to 0.1% w/w,
Metal octoate or neodecanoate is used in a ratio between 4-8% w/w,
Deionized water is used in a ratio between 5-10% w/w,
It is also possible to use food grade propylene glycol or polyethylene glycol (PEG) in the liquid composition as it has low or no toxicity. Such coolant / surface protectors are recommended to be used in machines which are used for preparation of Pharma, foods or food additives.
Sodium molybdate dihydrate is used as alkali molybdate.
Alkali metal octoate may be selected from food grade Potassium octoate (Octoate of potassium), sodium octoate other rare / alkali metal or a mixture thereof. Surprisingly, it is also observed that addition of rare metal octoate along with metal octoate, may further enhance the lubricating capacity, corrosion inhibition and heat carrying capacity of coolant used in the cooling system of combustion engines, electric vehicles, industrial and submersible motors. Rare metal octoate is selected from bismuth, cerium or zinc octoate. Additionally, octoate of bismuth, cerium or zinc may also be replaced with neodecanoate of Potassium, bismuth, cerium or zinc.
The chemical structure of selected metal octoate or neodecanoate of formula A is provided as follows:
Chemical structure [Formula (A)]
Metal Octoate or Neodecanoate (CAS No.)

Potassium octoate (764-71-6)

Sodium octoate (19766-89-3)

Bismuth octoate (67874-71-9)

Cerium octoate (24593-34-8)

Zinc octoate (86338-28-5)
Potassium Neodecanoate (26761-42-2)
Cerium Neodecanoate (68084-49-1)

The said Metal octoate or neodecanoate of formula A (A1-A7) are readily available in the market or else it may be prepared in-situ during the


preparation of liquid composition using a reaction between metal source and octoic acid of formula (8) or neodecanoic acid of formula (9).
Metal source for preparation of metal octoate or neodecanoate of formula (A) is selected from hydroxide or oxide of potassium, sodium, bismuth, cerium, zinc or mixture thereof.
Dyes is used to give colour to the liquid composition and has no other advantageous effect on the liquid composition. Any dye known in the prior art including acid dyes may be used in the said liquid composition.
The liquid composition of the present invention can be free of silicate, phosphate, borate, azoles and amines.
According to the second embodiment, there is provided a process for the preparation of a Glycol based corrosion-inhibited antifreeze liquid composition the said process comprises the steps: (i) Reacting metal source in a ratio between 1 to 2% w/w with acid in
a ratio between 2 to 4% w/w selected from octanoic acid of
formula (8) or neodecanoic acid of formula (9) at a temperature
between 300C to 600C; (ii) Removing water from step-i by conducting vacuum evaporation at
a temperature between 300C to 900C to give metal octoate or
neodecanoate of formula A (A1-A7) in a ratio between 4 to 8%
w/w; (iii) Adding monoethylene glycol (MEG) or propylene glycol in above
step-ii in a ratio between 80-90% w/w at a temperature between
400C to 900C; (iv) Adding diethylene glycol (DEG) in a ratio between 0-6% w/w at a
temperature between 400C to 900C; (v) Adding Sodium molybdate dihydrate in a ratio between 0.08 to
0.1% w/w and deionized water in a ratio between 5-10% w/w at a
temperature between 400C to 900C; (vi) Adding dye to give colour to the reaction mass at a temperature
between 400C to 900C; (vii) Stirring the reaction mass for 1-2 hrs at a temperature between
400C to 900C;

(viii) Having cooled the reaction mass at a temperature between 20-300C to give glycol-based corrosion-inhibited antifreeze liquid composition.
According to the second embodiment, the process in general, may be described as follows:
An aqueous (deionized water) solution of metal source is charged in reactor and temperature is maintained between 300C to 600C. On attainment of temperature, an acid selected from octoic acid of formula (8) or neodecanoic acid formula (9) is charged in the reactor slowly ensuring completion of the reaction. After addition of required Acid, reaction is maintained at temperature between 300C to 900C while stirring the mass. After ensuring conversion of all reactants to product, a water drying phase is initiated and is attained moisture free / moisture in ppm level product by vacuum system or evaporation at a temperature between 300C to 900C to give metal octoate. Once metal octoate is ready, following chemicals have been added in the said reaction mass, one by one along with maintaining temperature 400C to 900C i.e. (i) monoethylene glycol or propylene glycol, (ii) Diethylene Glycol followed by addition of a solution of Sodium molybdate dihydrate in deionized water. Dyes is also added for colour differentiation.
Metal source for preparation of metal octoate or neodecanoate of formula (A – A1 to A7)) is selected from hydroxide or oxide of potassium, sodium, bismuth, cerium, zinc or mixture thereof. A list of Metal source may be described in brief as follows: Potassium hydroxide (KOH), Sodium hydroxide (NaOH), Bismuth hydroxide (BiOH3), cerium (III) hydroxide (CeOH3), zinc hydroxide (ZnOH2), Potassium oxide (K2O), Sodium oxide (Na2O), Bismuth (III) oxide (Bi2O3), cerium oxide (CeO2), zinc oxide (ZnO).
Now, as per the process described in the second embodiment, different types of liquid compositions have been prepared. The examples 1-3 are provided for better explanation and understanding and is possible to prepare different types of liquid compositions as per the requirement. The given examples therefore should not be considered as limit the scope of the invention.
EXAMPLES (AS PER SECOND EMBODIMENT)
Preparation glycol-based corrosion-inhibited antifreeze liquid
composition:
Examples 1 to 3 provided as follows:

Example-1: For 100 kgs of liquid composition:

S. No. Raw material Quality Qty
1. Potassium Hydroxide 99.9 % Technical grade 1.454
2. Water Deionized water duly adjusted pH to neutral 8.73
3. Octoic Acid 99.5 + Purity by Assay 2.91
4. Diethylene Glycol 99.5 % by assay 4.13
5. Monoethylene Glycol 99.5 % by assay 83.3
6. Sodium molybdate dihydrate 99.5 % purity by Assay 0.103
7. Acid Dyes 99.5 % by Assay 0.003
Example-2: For 100 kgs of liquid composition:

S. No. Raw material Quality Qty
1. Potassium Hydroxide 99.9 % (Pharma Grade) 1.454
2. Water Deionized water duly adjusted pH to neutral 8.73
3. Octoic Acid 99.5 + Purity by Assay 2.91
4. Propylene Glycol 99.5 % by assay and Food grade product 87.43
6. Sodium salt of Molyblade 99.5 % purity by Assay and free from heavy metals 0.103
7. Acid Dyes 99.5 % by Assay meeting the requirement of food grade standard 0.003
Example-3: For 100 kgs of liquid composition:

S. No. Raw material Quality Qty
1. Potassium Hydroxide 99.9 % (Technical grade) 1.454
2. Water Deionized water duly adjusted pH to neutral 8.73
3. Octoic Acid 99.5 + Purity by Assay 2.91
4. Propylene Glycol 99.5 % by assay Technical grade 87.43
6. Sodium molybdate dihydrate 99.5 % purity by Assay 0.103
7. Acid Dyes 99.5 % by Assay 0.003
Now, as per the process described in the second embodiment, different types of liquid compositions have been prepared. The examples 1-3 are provided for better explanation and understanding and is possible to prepare different types of liquid compositions as per the requirement. The given examples therefore should not be considered as limit the scope of the invention.

TRIALS AND RESULTS
1. EFFECT OF LIQUID COMPOSITION ON EMISSION OF VEHICLES:
Glycol-based corrosion-inhibited antifreeze liquid composition as per the present invention is prepared and a comparative evaluation with OEM (commercially available) supplied coolant was carried out through conducting various trials on different vehicles.
For emission monitoring, An NABL approved SICART (Sophisticated Instrumentation Centre for Applied Research and Testing, SAIF -Sophisticated Analytical Instruments Facility) Supported by Department of Science & Technology (Govt.of India) was engaged.
TRIAL-1: Comparative evaluation between composition of Example-1 of the present invention and OEM coolant:
Date of trial: 23 November 2023 Type of vehicle: Innova Crysta Fuel: Diesel Results on Emission: Table-1:

Sr.No
1 2 3 AC* status OFF
OEM 800 G* 800 ON
OEM 800 G* 800 ON
OEM 1500 G* 1500 ON
OEM A* G* A* ON
OEM B* G* B*

Type of coolant

RPM

Parameters Result (PPM)

No 1405
154
0 1350
92
0 2050
110
0 1905
69
0 1078
594
0 825 564 23 2796
7
0 2000
0
0 3186
13
0 2625
0
0

CO

SO2

TRIAL-2: Comparative evaluation between composition of Example-1 of the present invention and OEM coolant:
Date of trial: 23 November 2023
Type of vehicle: Heavy duty truck (Dumper)
Registration number: GJ18AX 8992
Fuel: Diesel
Results on Emission: Table-2:

Sr. Parameters OEM G
800
1582
0
0
0.01
%
0.00
% OEM
1500
2416
179
0
0.01
%
0.10
% G
1500
1831
34
0
0.01
%
0.02
% OEM G
No. RPM 800


3000 3000
1 NO 2104


1557 1700
2 CO 93


64 33
3 SO 2 0


0 0
4 Hydrocarbon 0.00%


0.01% 0.01%
5 Poison Index 0.04%


0.05% 0.02%

TRIAL-3: Comparative evaluation between composition of Example-3 of the present invention and OEM coolant:
Date of trial: 28 September 2024 Type of vehicle: LMV Passenger car Registration number: GJ06 FC 8455 Fuel: Petrol Results on Emission: Table-3:

Sr.
No.
1
2
3
4
S Parameters OEM G OEM G OEM G

RPM 1000 1000 2000 2000 3000 3000

NO 23 8 14 14 13 07

CO 1499 415 974 182 878 260

SOx 73 18 56 5 49 4

Hydrocarbon 0.00% 0.07% 0.00% 0.07% 0.00% 0.06%

Poison Index 2.93% 0.36% 1.60% 0.66% 1.24% 0.16%
From above results of table 1 to 3, it is evidential that the liquid composition of the present invention has substantial reduction of emissions for different vehicles and having superior performance and quality over the OEM (Original Equipment Supplier / Commercially available) coolant.
The reduction of emission is a results of efficient combustion process and is confirmed by the users by testimonials. The users realised that the fuel efficiency of their vehicles has improved by minimum 10 % from their previous average fuel efficiency with OEM coolant.
In brief, the application of the proposed liquid composition will improve fuel efficiency of the engine and reduce emission of carbon dioxide substantially. It improves engine efficiency by 10 to 15 % against existing antifreeze/coolant compositions or coolants.
The use of proposed liquid composition also reduces the poison index of flue gases emitted by the vehicle. The improved fuel efficiency will contribute in conservation of fossil fuel and reduced emission will contribute in conservation of environment which will reduce the environmental impact of vehicular pollution globally and will contribute a step towards protecting climate change.
2. EFFECT OF LIQUID COMPOSITION ON HEAT TRANSFER:
The proposed liquid composition also works as efficient heat transfer medium to control and maintain engine temperature for efficient fuel economy and lubrication in the following manner:
LMTD stands for Logarithmic Mean Temperature Difference. It's a calculation used in heat transfer engineering, particularly in heat

exchangers, to determine the average temperature difference between two fluids. This average is important because the temperature difference (delta T) changes as heat is transferred along the length of the heat exchanger.
The temperature difference (delta T) across a car radiator refers to the change in air temperature as it passes through the radiator. This temperature difference is typically between 10-20°C. Coolant in the radiator is typically around 80-92°C, and the engine's normal operating temperature is usually 90-104°C.
The vapor pressure of Monoethylene Glycol (MEG) of the present liquid compositon at 92°C is approximately 10 mm Hg. This means that at 92°C, the pressure exerted by MEG vapor in equilibrium with its liquid phase is about 10 mm of mercury.
Whereas the vapor pressure of water at 92°C is approximately 567 mm Hg. This means that at 92°C, the pressure exerted by MEG vapor in equilibrium with its liquid phase is about 567 mm of mercury. Vapour part in circulation, creates vapour lock in coolant pump and adversely affect pumping capacity which ultimately results in lower heat removing capacity.
Total heat removal by radiator is directly proportionate to the LMTD. Hence higher the LMTD, higher the heat removing capacity. Hence it is evident that liquid composition of the present invention provides excellent results as efficient heat transfer medium to control and maintain engine temperature for efficient fuel economy and lubrication and prevent engine failures due to freeze-up, boiling-over, or over¬heating.
3. EFFECT OF LIQUID COMPOSITION ON SUBMERSIBLE MOTORS:
Figure 1 to 3 are provided for better understanding on the performance
of the liquid composition of the present invention. The said figures also
clearly show the comparative evaluation of liquid composition of the
present invention with commercially available coolant and conventional
water.
Figure-1: Parts of submersible motor after having filled with liquid
composition of the present invention for 3 months.
Figure-2: Parts of submersible motor after having filled with
commercially available coolant for 3 months.
Figure-3: Parts of submersible motor after having filled with
conventional water for 3 months.

The effect of liquid composition of the present invention on the submersible motor performance is evaluated by the ageing methodology.
Submersible motors were selected from various manufacturers and such motors were filled with conventional water or commercially available coolant and similar motors at the same time were filled with liquid composition of the present invention.
The motors were reopened after three months duration and were checked for internal corrosion. Referring figure-1, it was observed that the liquid composition of the present invention keeps internal surfaces wet and doesn’t allow corrosion on internal parts of motors. At the same time, figure-2 and 3 shows that internal parts of the submersible motor have been affected with corrosion.
From the said figures 1 to 3 and observations made after 3 months, it is clear that the liquid composition of the present invention enhances the life of motors which will be beneficial to the users and will improve sustainability.
ADVANTAGES OF THE PRESENT INVENTION
1. The proposed Glycol based corrosion-inhibited antifreeze liquid composition for combustion engines, electric vehicles, industrial and submersible motors provide efficient heat transfer to control and maintain engine temperature for efficient fuel economy and lubrication, and prevent engine failures due to freeze-up, boiling-over, or over-heating.
2. The proposed Glycol based corrosion-inhibited antifreeze liquid composition free of silicate, phosphate, borate, azoles and amines.
3. The proposed Glycol based corrosion-inhibited antifreeze liquid composition comprises less in-organic chemicals or additives compared to prior art compositions and useful as an excellent environment friendly ready to use composition for combustion engines, electric vehicles, industrial and submersible motors.
4. The proposed Glycol based corrosion-inhibited antifreeze liquid composition is using less amount deionized water compared to prior art compositions and is a great option for replacement of water-based antifreeze/coolant compositions.
5. The proposed Glycol based corrosion-inhibited antifreeze liquid composition reduces the emission ie., CO (carbon Monoxide), NOx (Oxide of Nitrogen), SPM (Suspended Particulate Matter), Poison Index of automobile vehicles by 2 to 20 % and improves

fuel efficiency by 2 to 15 % thus helps in reducing environment or air pollution to the great extent.
LIST OF ABBREVIATIONS & MEANING THEREOF
* AC – Air Conditioner machine
A* - On road running at 40 km / hr
B* - On road running at 80 km / hr
OEM: Commercially available liquid composition/Coolant
G* - liquid composition as per the present invention
NO- Nitrogen oxide
CO- Carbon dioxide
SO2 – Sulfur dioxide
Sox – Sulfur dioxide or sulfur trioxide or mixture thereof.
LMTD - Logarithmic Mean Temperature Difference

WE CLAIM:
1. A Glycol based corrosion-inhibited antifreeze liquid composition
comprises:
Mono ethylene glycol (MEG) or Propylene glycol in a ratio between
80-90 % w/w;
Diethylene glycol (DEG) in a ratio between 0-6% w/w;
Alkali Molybdate in a ratio between 0.08 to 0.1% w/w;
Metal octoate or metal neodecanoate of formula A (A1-A7) in a ratio
between 4-8% w/w;
Deionized water in a ratio between 5-10% w/w,
2. The Glycol based corrosion-inhibited antifreeze liquid composition as claimed in claim-1 wherein Sodium molybdate dihydrate is selected as alkali molybdate.
3. The Glycol based corrosion-inhibited antifreeze liquid composition as claimed in claim-1 wherein metal octoate or metal neodecanoate of formula A is prepared from metal source and acid selected from octanoic acid of formula (8) or neodecanoic acid of formula (9).
4. The Glycol based corrosion-inhibited antifreeze liquid composition as claimed in claim-3 wherein metal source is selected from hydroxide or oxide of potassium, sodium, bismuth, cerium, zinc or mixture thereof.
5. A process for the preparation of a Glycol based corrosion-inhibited antifreeze liquid composition comprises the steps:
(i) Reacting metal source in a ratio between 1 to 2% w/w with acid in a ratio between 2 to 4% w/w selected from octanoic acid of formula (8) or Neodecanoic Acid of formula (9) at a temperature between 300C to 600C

Formula (8) Formula (9);
(ii) Removing water from step-i by conducting vacuum
evaporation at a temperature between 300C to 900C to give
metal octoate or metal neodecanoate of formula A (A1 to A7)
in a ratio between 4 to 8& w/w; (iii) Adding monoethylene glycol (MEG) or propylene glycol in
step-ii in a ratio between 80-90% w/w at a temperature
between 400C to 900C; (iv) Adding diethylene glycol (DEG) in a ratio between 0-6% w/w
at a temperature between 400C to 900C;

(v) Adding Sodium molybdate dihydrate in a ratio between 0.08 to 0.1% w/w and deionized water in a ratio between 5-10% w/w at a temperature between 400C to 900C;
(vi) Adding dye to give colour to the reaction mass at a temperature between 400C to 900C;
(vii) Stirring the reaction mass for 1-2 hrs at a temperature between 400C to 900C;
(viii) Having cooled the reaction mass at a temperature between 20-300C to give glycol-based corrosion-inhibited antifreeze liquid composition.
6. The process for the preparation of a Glycol based corrosion-inhibited antifreeze liquid composition as claimed in claim-5 wherein metal source is selected from hydroxide or oxide of potassium, sodium, bismuth, cerium, zinc or mixture thereof.
7. The process for the preparation of a Glycol based corrosion-inhibited antifreeze liquid composition as claimed in claim-6 wherein metal source is selected from Potassium hydroxide (KOH), Sodium hydroxide (NaOH), Bismuth hydroxide (BiOH3), cerium (III) hydroxide (CeOH3), zinc hydroxide (ZnOH2), Potassium oxide (K2O), Sodium oxide (Na2O), Bismuth (III) oxide (Bi2O3), cerium oxide (CeO2), zinc oxide (ZnO).