WERKWIJZE VOOR DE ISOMERISATIE VAN OLEFINISCH ONVERZADIGDE VERBINDINGENDOOR VERSCHUIVING VAN DUBBELE BINDINGEN

摘要

1305123 Double bond isomerization SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 28 April 1971 [30 April 1970] 11912/71 Heading C5E [Also in Division B1] Ethylenically unsaturated hdrocarbons having at least 4 carbon atoms undergo double bond isomerization by contact with a catalyst comprising zero-valent or micro-valent nickel chelated with a tertiary organophosphorus moiety in which a carboxymethyl or carboxyethyl group is attached directly to the phosphorus atom. Suitable feedstocks are 1-alkenes; 1,6-heptadiane; methylenecyclohexane; 4-oxylcyclohexane-1, 4-propenylcyclohexene-1; 1,5- cyclooctadiene and bicydo [3,3,0]-octene-2, The nickel may have other ligands, e.g. #-alkyl groups. Catalysts used in the examples are prepared from (a) equimolar amounts of bis- 1,5-cylooctadiene nickel (0) and diphanyl carboxymethyl phosphine, or (b) equimolar amounts of bis #-isotyl Ni and dimethyl 2- carboxyethyl phosphorons acid ester. In an example ethylene was oligomerized with catalyst (a) above and the resulting C 4 -C 20 alphaackane mixture isomerized upon standing in contact with the same catolyst to corresponding internal olefins.