Hydrocyanation of olefinically unsaturated nitriles into dinitrile compounds
US5488129A · kind A · utility
17Cited by
13References
28Claims
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Key dates
| Filing date | Nov 3, 1994 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Nov 3, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C253/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ethylenically unsaturated aliphatic nitriles, for example the linear pentenenitriles, are converted/hydrocyanated into their corresponding dinitriles, for example adiponitrile, by reacting such nitriles with hydrogen cyanide, in an aqueous reaction medium which comprises (1) a catalytically effective amount of a transition metal compound and a sulfonated phosphine, together with (2) a cocatalytically effective amount of at least one Lewis acid; the Lewis acid cocatalyst promotes the linearity of the final product dinitriles and/or prolongs the useful life of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.