Acrylonitrile dimerization process

Details Acrylonitrile dimerization process Acrylonitrile dimerization process

1979-07-17

1981-04-21

Brust, Joseph P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12000, C07C12130

Patent

active

042632242

ABSTRACT:
A process for the dimerization of acrylonitrile to predominantly straight-chain C.sub.6 dimers, in which the acrylonitrile is dissolved in an organic solvent capable of donating protons, the acrylonitrile and solvent being substantially dry, and the solution contacted with a catalyst comprising a phosphorus (III) compound of general formula: ##STR1## where Ar is an aromatic nucleus and where groups X, which may be the same or different, are electron-donating substituents of the aromatic nucleus which give rise to a negative Hammett .sigma. constant, and R represents a hydrocarbyl group, the acrylonitrile and solvent being contacted with a low-cost scavenging reagent for a predetermined period of time before being contacted with the aforementioned catalyst.

REFERENCES:
patent: 4126632 (1978-11-01), Hogan et al.
patent: 4138428 (1979-02-01), Jennings et al.
Clark et al., Quarterly Reviews, 18, (1964), pp. 295-320.
Hidai, et al., Aspects of Homogeneous Catalysis, vol. 2, (1974), pp. 159-188.
Dietsche, Tetrahedron Letters, No. 51, pp. 6347-6351, (1966).

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