FORM 2
THE PATENT ACT 1970 (39 of 1970)
&
The Patents. Rules, 2003 COMPLETE SPECIFICATION
(See Section 10, and rule 13)
1. TITLE OF INVENTION
AN IMPROVED PROCESS FOR VAPOR RECOVERY
2. APPLICANT(S)
a) Name : CYBERDYNE TECHNOLOGIES (INDIA) PVT. LTD.
b) Nationality : INDIAN Company
c) Address : PLOT A-4 08, 2 8TH ROAD,
WAGLE INDUSTRIAL ESTATE, MUMBAI-400 604, MAHARASHTRA, INDIA
3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed : -

FIELD OF THE INVENTION
The present invention in general relates to a process of reducing emission levels and more specifically to a process of vapor recovery from a vapor emitting unit in order to reduce emission levels.
BACKGROUND OF THE INVENTION
Emission standards have been enforced globally to check fuel emissions. The conservation of the environment is a prime concern of countries across the world. With the clear natural warning in the form of global warming and climatic changes people cannot help but be stricter to protect the environment. Laws are being made and enforced globally to check various pollutions of the environment and more stringent provisions and penalties are being enforced on the violators. Emission standards are being revised frequently on a global basis, to be made more stringent in order to check pollution to the maximum.
Thus, there exists a continuous challenge in the industry to develop products and technology, which are compliant with the existing emission standards. Technologists are constantly researching newer ways to improve their industrial emission standards in order to check pollution. The automobile technology and the oil and gas sectors are the prime areas for substantive research to check the volume of emissions released to the atmosphere in order to be compliant to the pollution standards.
Oil vapors in oil and gas stations create significant pollution. Continuous ongoing research is performed in the industry to check the emission of oil vapors in the environment, in order to reduce pollution. Further, such loss of vapor also results in loss of a considerable volume of valuable oil which is a vital resource in present times.

Thus, there was a long felt need to provide a process that would overcome the above-mentioned problems by reducing emission levels and recovering the vapor in the form of usable fuel. The process for vapor recovery in accordance with the present invention meets the aforesaid long felt need.
All through out the specification including the claims, the words "emission", "pollution", "oil", "gas", "vapor", "tank", "pipe", "stack", "adsorb", "absorb", and "gasoline" are to be interpreted in the broadest sense of the respective terms and includes all similar items in the field known by other terms, as may be clear to persons skilled in the art. Restriction/Limitation if any, referred to in the specification, is solely by way of example and understanding the present invention.
OBJECTS OF THE INVENTION
It is the principal object of the present invention to provide a process for vapor recovery in order to reduce the emission levels.
It is a further object of the present invention to provide a process for vapor recovery, which results in lowering of pollution by checking the emitted vapor.
It is yet another object of the present invention to provide a process for process for vapor recovery, wherein the recovered vapor is recycled in dispensing fuel.
It is a further object of the present invention to provide a process for vapor recovery, which can take place continuously in a non-stop manner, without any requirement of change in filtering means.
It is yet another object of the present invention to provide a process for vapor recovery, which involves simplified application and low cost of production.

How the foregoing objects are achieved and the other aspects of the present invention will be clear from the following description, which is purely by way of understanding and not by way of any sort of limitation.
SUMMARY OF THE INVENTION
The present invention discloses a process of vapor recovery for reducing emission levels, said process comprising steps of, adsorption in a suitably arranged adsorption layer by an adsorbent material during adsorption cycle, regeneration of said adsorbed layer by a pump at the regeneration cycle. The adsorbed vapours are re-absorbed in fresh liquid gasoline in an absorber vessel.
More particularly the present invention discloses a viable process for vapor recovery for reducing emission levels at fuel retail outlet. The said process comprises steps of, passing vapor from an underground tank or from unloading Tanker to a vapor recovery unit through vapor lines, adsorbing said vapour in suitably arranged adsorption chamber via activated carbon pellets, regenerating said adsorbed layer using an air cooled vacuum pump at a regeneration cycle for desorbing thereof, recycling the vapors so desorbed into an absorber vessel and mixing said vapors with dispensing fuel from the Storage Tank
According to preferred embodiments of the present invention relating to process for vapor recovery:
- said adsorbent material comprises of activated carbon beds.
- said pump comprises an air-cooled vacuum pump.

The present invention further discloses a vapor-recovery unit for reducing emission levels, said vapor recovery system comprising the following:
• A vapor header adapted to lead vapor to an adsorbent material through a vapor line
• An activated carbon adsorption layer for gaseous emissions
• A regenerative layer for regenerating said adsorption layer
• A pump for removal of adsorbed vapor on saturation, regenerating said adsorbent material.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The nature and scope of the present invention will be better understood from the accompanying drawings, which are by way of illustration of some preferred embodiments and not by way of any sort of limitation. In the accompanying drawings,
Fig 1 illustrates the process for vapor recovery as disclosed in the present invention
Fig 2 illustrates a preferred lay out in the present invention.
DETAILED DESCRIPTION OF THE INVENTION
The following describes some preferred embodiments of the present invention, which are purely for the sake of understanding the present invention and not by way of any sort of limitation.
The present invention relates to a process for reducing emission levels. The process as disclosed in the present invention is performed by vapor recovery from emitted vapors of a underground fuel storage tank, while dispensing of Gasoline and while unloading of Road Tanker to underground Tank. The process involves a vapor

recovery unit, which recovers the fuel vapors and recycles it back to dispensing fuel. The vapor recovery unit comprises of active adsorption material providing a large surface area, for effective adsorption. The vapor gets adsorbed on the surface in the form of a thin layer. On saturation, a regenerative unit pumps out the accumulated vapor thus de saturating the active adsorption material. The process is illustrated in further detail in the following paragraphs of the description with the help of illustrative drawings.
Figure 1 illustrates the process of vapor recovery for reducing emission levels as disclosed in the present invention. The underground tank 1 as shown in the figure acts as the storage of fuel. A non-limiting example may be gasoline.
The vapor exiting from the above fuel tank is allowed to pass through adsorber vessel. A vapor header line facilitates the passage of vapor from the underground tank to vapour Recovery Unit. The vapor recovery unit comprises of two activated carbon beds, one being under adsorbtion, other being desorbtion. The desorbtion is regeneration by means of a vacuum.
Apart from these two vessels one more vessel is also used which is adsrobtion cum regeration. This vessel is also filled with actived carbon and is dedicated to unloading of Gasiline from Road Tanker to underground tank. This is required because the unloading of Gasoline to Underground Tank is once a day and all gasoline vapours can be adsorbed in this vessel but regeration can be slow process as adsorbtion for this vessel is only next day.
The active adsorption material used in the present invention is activated carbon. Persons skilled in art should be capable of understanding that this can be performed by other means for achieving the same objectives. Activated carbon has an extremely large surface area in relation to its particle volume. The hydrocarbons are adsorbed in the form of a thin layer of liquid on the surface of the carbon. The carbon can only adsorb a given amount of vapour, before it approaches saturation. If this occurs

throughout the bed, then the vapours will pass through untreated. Consequently, the carbon must be regenerated in order to restore its capacity, so that it can effectively adsorb hydrocarbons in the following cycle.
The regeneration takes place in a single stage. The bed is evacuated until the pressure reaches a point at which the above process is reversed, i.e. the hydrocarbons begin to de-sorb from the carbon resulting in their complete removal at this stage. This results in regeneration of the active carbon layer for further adsorption.
Subsequently, the hydrocarbon vapours are diverted via an air-cooled vacuum pump into an absorber vessel where they get absorbed in liquid gasoline. The accompanying figures illustrates a preferred embodiment of the vacuum pump, that is used for the above process in the present invention. The process goes on continuously with vapour circulating from the underground tank and ultimately mixing with the fuel being dispensed.
In case of unloading from Road tanker, the vapours are directed to dedicated adsorbet vessel which is desorbed slowly during the rest of the time of the day.
In the complete operation it is ensured that almost all vaours are converted to liquid and recycled back to storage Tank.
The vapour recovery unit has safety features like pressure relief valve vacuum relief valve and a controlled valve for efficient operation of the vapour recovery unit.

The following are the non-limiting advantages of the present invention:
1. Reduces emission levels significantly,
2. Continuous process and need not be stopped for servicing filters,
3. Environment friendly,
4. Simple in construction and very cost effective,
5. Easy installation procesures.
The present invention has been described with reference to some drawings and preferred embodiments, purely for the sake of understanding and not by way of any limitation and the present invention includes all legitimate developments within the scope of what has been described herein before and claimed in the appended claims.

WE CLAIM:
1. A process of vapor recovery for reducing emission levels, said process comprising steps of, adsorption in a suitably arranged adsorption layer by an adsorbent material, regeneration of said adsorbed layer by a pump at a regeneration layer, recycling adsorbed vapors into an absorber vessel and mixing said vapors with dispensing fuel.
2. A process for vapor recovery for reducing emission levels, said process comprises steps of, passing vapor from an underground tank to a vapor recovery unit through a vapor line, adsorption in suitably arranged adsorption layer by an adsorbent material, regeneration of said adsorbed layer and evacuation of said vapor by a pump at a regeneration layer for desorbing thereof, recycling vapors so desorbed into an absorber vessel and mixing said vapors with dispensing fuel.
3. A process for vapor recovery for reducing emission levels, said process comprises steps of, passing vapor from an underground tank to a vapor recovery unit through a vapor line, adsorption of said vapour in suitably arranged adsorption layer by activated carbon surface, regeneration of said adsorbed layer and evacuation of isolated hydrocarbon vapor by an air cooled vacuum pump at a regeneration layer for desorbing thereof, recycling vapors so desorbed into an absorber vessel and mixing said vapors with dispensing fuel.
4. The process of vapor recovery for reducing emission levels as claimed, wherein, said adsorbent material comprises of at least an activated carbon bed.
5. The process of vapor recovery for reducing emission levels as claimed, wherein, said pump comprises an air-cooled vacuum pump.

6. A vapor-recovery unit for reducing emission levels, said vapor recovery system comprising, a vapor header adapted to lead vapor to an adsorbent material through a vapor line, an activated carbon adsorption layer for gaseous emissions, a regenerative layer for regenerating said adsorption layer, and a pump for removal of adsorbed vapor on saturation, regenerating said adsorbent material.
7. The vapor recovery unit as claimed, wherein, said pump comprises an air-cooled vacuum pump.
8. The vapor-recovery unit as claimed, wherein, said pump is adapted to divert removed vapour into an absorber vessel, for mixing with dispensing fuel.