THREE STAGE CATALYTIC TREATMENT, UNDER HYDROGEN PRESSURE OF HIGHLY UNSATURATED HEAVY CUTS

摘要

specific disclosure.the invention relates to a hydrogenation processoutbreak of a hydrocarbon fraction from a fluid.operation of heating, hot, for the most part, beyondc and containing more than 80% by weight of oil aromati -products and more than 0.01% by weight of sulphur. in this process, wefirst of all, to move the unstable fraction oilwith hydrogen in contact with a catalyst containing athe metal of the group viii, at a temperature of 50 to 300 c. we treatthe product obtained with hydrogen in contact with acatalyst containing at least one metal of each of the groups.via and viii at a temperature of 250 to 400 c are discussed finally.the product obtained with 200 new ii by hydrogencontact with a catalyst containing 0.1 to 2% by weight of at least onenoble metal of group viii, 0.5 to 15% by weight of chlorine orfluoride and alumina. we collect a fractionhydrogenated oil and stabilized. the process ofthe invention enables to significantly increasethe yield of ethylene in a steam cracking.