Patent ID: 6858133
Filing Date: 2005-02-22
Classification: B01J,C07C,C09K,C10G

Abstract:
1. A process for desulfurising an olefin-containing hydrocarbon feedstock including sulphur-containing hydrocarbon compounds as impurities, the process comprising passing a hydrocarbon feedstock containing one or more olefins through a reactor containing a crystalline silicate selected from the group consisting of an MFI-type crystalline silicate having a silicon/aluminum atomic ratio of at least 180 and an MEL-type crystalline silicate having a silicon/aluminum atomic ratio of from 150 to 800 which has been subjected to a steaming step, at an inlet temperature of from 500 to 600° C., at an olefin partial pressure of from 0.1 to 2 bars and the feedstock being passed over, the catalyst at an LHSV of from 5 to 30 h −1 to produce an effluent with an olefin content of lower molecular weight than that of the feedstock and hydrogen sulphide, and removing hydrogen sulphide from the effluent.