| abstract |
The present invention provides an integrated process for the production of adiponitrile by the double hydrocyanation of 1,3-butadiene, which allows the connection of two hydrocyanation catalyst cycles during the production of adiponitrile. In a first treatment step, 1,3-butadiene is hydrocyanated to 3-pentenenitrile with at least one nickel (0) catalyst; In the second treatment step, 1,3-butadiene is hydrocyanated by hydrocyanation of 3-pentenenitrile to adiponitrile with at least one nickel (0) catalyst to which at least one Lewis acid is added. A method for producing adiponitrile, comprising: A method of transferring at least one nickel (0) catalyst used in at least a part of a specific processing step to another processing step. [Selection figure] None |