| 摘要 |
Mercaptans and sulphides are prepared by treating an olefinic material, viz. a hydrocarbon or halogenated hydrocarbon containing one or more aliphatic double bonds, with hydrogen sulphide in the presence of stannic chloride. Reaction conditions are generally as disclosed in Specification 602,238. Part of the tin precipitates as a chlorosulphide, and part remains in solution, both possessing catalytic activity for the reaction. In examples: (1) to (4) hydrogen sulphide is bubbled into di-isobutene after or while adding stannic chloride, the temperature being maintained at 40-50 DEG C.; (5) the precipitate of tin chlorosulphide of (4) is used as catalyst in further successive condensations of di-isobutene with hydrogen sulphide; (6) a solution of stannic chloride in di-isobutene and hydrogen sulphide are simultaneously passed down a packed tube; (7) stannic chloride is added to a solution of hydrogen sulphide in chloroform, trimethylethylene then being added at -80 DEG C.; (8) hydrogen sulphide is bubbled into diamylene and stannic chloride. Specification 454,668 also is referred to. |
