Method of producing straight-chain acrylonitrile dimers
AssigneeUbe Industries, Ltd.
InventorsRyoji Sugise, Kouichi Kashiwagi, Masashi Shirai, Toshihiro Shimakawa
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Abstract
Straight-chain acrylonitrile dimers including 1,4-dicyanobutene, 1,4-dicyanobutadiene and adiponitrile are produced at a high selectivity rate and yield by dimerizing acrylonitrile in the presence of a catalyst comprising at least one ruthenium compound, for example dichloro-tetrakis (dimethylsulfoxide) ruthenium, and in the presence of at least one organic acid, for example, propionic acid, and optionally in the further presence of a basic compound, a reducing compound and/or a sulfoxide compound.
Claims25
A method of producing straight-chain acrylonitrile dimers including 1,4-dicyanobutene, 1,4-dicyanobutadiene and adiponitrile, comprising dimerizing acrylonitrile in the presence of a catalyst consisting essentially of at least one ruthenium compound selected from the group consisting of inorganic ruthenium compounds, ruthenium carboxylates and ruthenium coordination compounds and in the additional presence of an organic carboxylic acid having 1 to 20 atoms.
Dependencies are inferred from the claim text.