| 摘要 |
1,180,729. Hydrogenation; isomerization. UNILEVER Ltd. 3 April, 1967 [7 April, 1966], No. 50737/69. Divided out of 1,179,504. 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 dialkyl ketone of formula R 1 COR 2 , where R 1 and R 2 are each C 1-5 alkyl groups. The preferred solvent is acetone. The starting compound may be an olefin, an acetylene, or an unsaturated fatty acid glyceride, specific compound 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. |
