Patent ID: 6365542
Filing Date: 2002-04-02
Classification: B01J

Abstract:
A method of presulfurizing a hydrogenation catalyst comprising contacting said catalyst with elemental sulfur at such a temperature as to allow said elemental sulfur incorporating substantially into the pores in said catalyst by sublimation and/or melting, where in said method comprises further (1) mixing an olefin-containing component, elemental sulfur and a promoter, and heating the resultant mixture at 100-220Â° C. for 0.5 hour or more, wherein the mole number of elemental sulfur is not less than the mole number of double bond of the olefin, and the amount of the promoter used is 10-80 wt % of that of elemental sulfur used, and said promoter is one or more organic promoters selected from the group consisting of the following compounds: tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetramethylthiuram sulfide, tetramethylthiuram tetrasulfide, 2-mercapto benzothiazole, dibenzothiazole disulfide, N,Nâ€²-diisopropyl-2-benzothiazole sulfenamide, N-tert-butyl-2-benzothiazole sulfenamide, N,N-dicyclohexyl-2-benzothiazole sulfenamide, N,O-di(1,2-ethylene)-2-benzothiazole sulfenamide, 1,2-ethylene thiourea, N,N-di-n-butyl thiourea, diphenyl thiourea, dithio-di-n-butyl xanthic acid, diphenylguanidine, di-o-tolylguanidine, triphenylguanidine, and N,O-(1,2-ethylene) thiocarbamyl-N,O-di(1,2-ethylene) sulfenamide.