Organo-phosphorous catalyst composition and process for making the same
AssigneeImperial Chemical Industries PLC
InventorsJames Robert Jennings, Lawrence Francis Michael Kelly
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Abstract
Catalyst composition for the dimerization of acrylonitrile comprising an organo-phosphorus compound of formula ##STR1## bonded to a matrix of an inorganic oxide having surface --OH groups, especially of silica or alumina. Groups R and Y are hydrocarbyl. The catalyst compositions are prepared by heating the matrix with an appropriate phosphorus compound having group(s) X which react with --OH groups with the elimination of HX. The invention also relates to a process for the dimerization of acrylonitrile. Main products are 1,4-dicyanobutene-1 and 2-methylene glutaronitrile.
Claims12
A catalyst composition, suitable for use in the dimerisation of acrylonitrile, consisting essentially of a matrix of a refractory metal oxide having chemically bonded to the surface thereof one or more organo phosphorus radicals of general formula ##STR5## where groups R, which may be the same or different, present hydrocarbyl groups and Y represents either a divalent hydrocarbyl group or a direct link, the appropriate phosphorus atom or atoms of the compound being bonded to the matrix through the oxygen atom of one or more surface hydroxyl groups of the matrix.
Dependencies are inferred from the claim text.