Method for producing dimerization product of acrulonitrile

Details Method for producing dimerization product of acrulonitrile Method for producing dimerization product of acrulonitrile

C - Chemistry, Metallurgy

07

C

C07C 255/04 (2006.01) B01J 31/22 (2006.01) C07C 253/30 (2006.01) C07C 255/09 (2006.01)

Patent

CA 2198081

An industrially suitable process for producing linear dimers of acrylonitrile readily at high efficiency in a high yield by the use of a highly active catalyst excellent in stability without forming any by-product difficult of separation. The above process comprises making acrylonitrile react in the presence of a ruthenium complex composed of a ruthenium atom as the central atom and molecules of cyclopentadiene or a derivative thereof as the ligands. The above process gives adiponitrile, 1,4-dicyanobutene or 1,4- dicyanobutadiene as the product and these dimers are useful as the intermediates of hexamethylenediamine and adipic acid which are the raw materials of nylon 66, or the intermediates of rust inhibitors or vulcanization accelerator for rubbers.

La présente invention concerne un procédé industriellement réalisable de production de dimères linéaires d'acrylonitrile. Cette production est facile, d'une grande efficacité et à rendement élevé en raison de l'utilisation d'un catalyseur hautement actif et d'une excellente stabilité ne provoquant aucune formation de sous-produit difficile à séparer. Le procédé de l'invention consiste à faire réagir l'acrylonitrile en présence d'un complexe de ruthénium constitué d'un atome de ruthénium comme atome central et de molécules de cyclopentadiène ou de dérivés de ces molécules comme ligands. Ce procédé produit un adiponitrile, un 1,4-dicyanobutène ou un 1,4-dicyanobutadiène, lesquels dimères conviennent particulièrement comme intermédiaire de l'hexaméthylènediamine et l'acide adipique, qui sont les matières premières du Nylon 66, ou comme intermédiaire d'inhibiteurs de la rouille ou d'accélérateurs de vulcanisation pour les caoutchoucs.

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