Process for the preparation of a novel catalyst useful for sweetening of sour petroleum distillates

摘要

A process for the preparation of a Halogenated Metal Phthalocyanine catalyst of formula 1. Structure of Halogenated Metal Phthalocyanine suitable for sweetening a wide range of sour petroleum distillates comprising mixing metal phthalocyanine with a halogenating agent in a stoichiometric ratio in an inert organic solvent, refluxing or heating and stirring for a time period, distilling the excess halogenating agent from the mixture, filtering and washing the residual mass by known method to obtain the desired halogenated metal phthalocyanine catalyst. Wherein the metal phthalocyanine used is selected from cobalt, nickel, iron, manganese phthalocyanine most preferably cobalt and iron phthalocyanine. The halogenating agent used is selected from the group consisting of chlorine, bromine, iodine, thionyl chloride sulphuryl chloride, phosphorous pentachloride, phosphorous oxychloride, phosphorous pentabromide, phosphorous tribromide, thionyl bromide and phosphorous trichloride, preferably selected from thionyl chloride, phosphorus pentachloride and chlorine. The inert organic solvent used is selected from O-dichlorobenzene and nitrobenzen wherein the halogenated metal phthalocyanine catalyst prepared is selected form the group consisting of dichloro, dibromo, diiodo, monochloro, monobromo and monoiodo derivatives of metal phthalocyanine preferably selected from dichloro and dibromo derivative of cobalt and iron phthalocyanine.