| 摘要 |
1,179,504. Hydrogenation; isomerization. UNILEVER Ltd. 3 April, 1967 [7 April, 1966 (3)], No. 15157/67. Headings C5C and C5E. Unsaturated aliphatic compounds are hydrogenated by hydrogen in a liquid-phase process in the presence of a catalyst comprising a solution of a stannous halide and a chloroplatinous or chloroplatinic acid compound (e.g. free acid or salt thereof) in a C 2-10 aliphatic carboxylic acid or an ester thereof, e.g. ethyl acetate or glycerol triacetate. The starting compound may be an olefin, an acetylene, or an unsaturated fatty acid glyceride, specific compounds mentioned being ethylene, propylene, hexene-1, octene-1, octadecene-1, ethyne, propyne, and fatty oils from sunflower, safflower, cottonseed, fish, whale, soyabean and rapeseed. By suitable choice of conditions the catalyst can be made selective, e.g. soyabean oil having 3 ethylenic bonds can be selectively hydrogenated to a product having only one ethylenic bond. The catalyst also favours isomerization, e.g. with hexene-1 starting material some of the product is hexene-2 and hexene-3, and with glyceride starting material any double bonds not hydrogenated are geometrically isomerized to the trans-form. |
