A process for stabilizing diolefin hold strength hydrocarbon mixtures

摘要

1301351 Treating diolefin-containing mixtures SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 29 April 1970 [1 May 1969] 20653/70 Heading C5E Hydrocarbons containing diolefins are stabilized by contacting at below 175‹ C. with hydrogen sulphide in the presence of a hydrogenative metal component or compound thereof to convert the diolefins to organic sulphur compounds. The contacting can be carried out in the presence of hydrogen containing 0À5-3 volume percent of hydrogen sulphide using a catalyst comprising sulphides of Co, Mo, Ni and/or W on alumina at 28-140 kg./cm.SP2/SP. The stabilized effluent can be calatytically hydrogenated at 205-315‹ C. and 42-140 kg./cm.SP2/SP using a catalyst comprising a mixture of the sulphides of Ni or Co and of Mo or W on alumina. Part of the gas separated from the hydrogenation can be recycled to the stabilization step. Suitable feeds boil between 40 and 425‹C. and result from the pyrolyses of heavy naphtha or of gas oil.