FORM - 2 THE PATENTS ACT, 1970 (39 of 1970) & THE PATENTS RULES, 2006 COMPLETE Specification (See Section 10 and Rule 13) A METHOD FOR REMOVING CHLORIDES FROM HYDROCARBON STREAM BY STEAM STRIPPING RELIANCE INDUSTRIES LIMITED an Indian Company of 3rd Floor, Maker Chamber - IV, 222, Nariman Point, Mumbai-400 021, Maharashtra, India The following specification particularly describes the invention and the manner in which it is to be performed. FIELD OF DISCLOSURE The present disclosure relates to a method for removing chlorides from a hydrocarbon stream. Particularly, the present disclosure relates to a method for removing chlorides from a heavy hydrocarbon stream such as naphtha, diesel, light vacuum gas oil, light coker gas oil, heavy atmospheric gas oil, heavy vacuum gas oil, heavy coker gas oil, vacuum gas oil or mixtures thereof. BACKGROUND Inorganic and organic chlorides present in even small quantities in hydrocarbon streams can upset the process conditions either by poisoning the catalyst or by causing corrosion of the equipment. For example: sever corrosion is observed in crude top column, hydrotreater reactor top and downstream circuit including surge drum, high temperature exchangers and transfer lines especially along the elbow/joint sections. Generally pitting type of corrosion is observed in these equipments, suggesting that chlorides are the main cause of corrosion. Among chlorides, hydrogen chloride and ammonium chloride have the highest potential to cause corrosion. In the hydrotreaters, the organic chlorides also get converted to inorganic chloride i.e. hydrogen chloride, therefore worsening the corrosion problem. The hydrocarbon stream coming from crude distillation unit has significant amounts of inorganic and organic chlorides. For example: the gas oil produced in atmospheric distillation may contain up to 25 ppm chlorides while the light vacuum gas oil produced in the top section of vacuum distillation unit may contain up to 50 ppm chlorides. These chlorides are mainly produced by hydrolysis of chloride salts of magnesium and calcium metals. These metal salts are present in the crude oil and carried to the distillation unit due to insufficient desalting. Thus, both the inorganic and organic chlorides are detrimental to the hydrocarbon processing units, especially the hydrotreaters, and must be removed from the hydrocarbon stream prior to processing. Commonly, an adsorbent or a catalyst is used to remove the chlorides from the hydrocarbon streams. US3 864243 discloses use of bauxite as a chloride adsorbent, where the adsorbent is dehydrated at 425 - 650 °C before use. US3935295 discloses the use of calcium and zinc oxide adsorbent for removal of inorganic chlorides. US4713413 discloses the use of alumina adsorbent at 20 °C for removing organic chlorides. US5107061 discloses the use of crystalline molecular sieve Zeolite X in soda form for removal of organic chlorides from a hydrocarbon stream. US5595648 and US5645713 disclose the use of low surface area solid caustic bed for removing chlorides from hydrocarbon streams. US5614644 discloses the use of copper containing scavenger material for removing organic chlorides from hydrocarbon streams and US6060033 discloses the use of alkali metal oxide loaded on alumina for removing inorganic chlorides from hydrocarbon streams. Use of the afore-mentioned chloride adsorbents for removing chlorides from heavy hydrocarbon streams such as vacuum gas oil, or coker oil is unfeasible due to their high viscosities and high pour points and presence of small amounts of asphaltenic materials. These properties of the heavy hydrocarbon streams cause following problems when an adsorbent is used: high delta pressure is required across the adsorbent bed, higher temperature conditions are required for adsorption, difficulty in regeneration of the adsorbent, lower chloride loading capacity and lower chloride removal efficiency. Also, catalysts have been used in the past for converting the organic chlorides to- inorganic chlorides. US3892818 uses rhodium catalyst to convert pure organic chlorides to hydrogen chloride, where the catalyst contains 0.1 wt% rhodium and the reaction is carried out at about 250 °C. US4721824 discloses the use of magnesium oxide and binder for catalytic removal of organic chlorides from hydrocarbon streams. US5371313 discloses the use of calcium oxide at 130 - 170 °C for removal of tert butyl chloride. The above-mentioned processes are suitable for light hydrocarbon streams (