Process of making alkyl phosphine compounds by reacting an olefin and a phosphine in the vapor phase over a mineral acid catalyst
AssigneeAmerican Cyanamid Company
InventorsC. Joseph Calbick, Mark A. Kuck, Donald H. Valentine
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Abstract
Alkylphosphines are made by a reaction of gaseous phosphine and the corresponding gaseous olefin in contact with at least one non-oxidizing acid catalyst. Products produced thereby are alkylphosphines which contain substantially no metallic or oxygenating impurities. The process is a continuous process and employs a mineral acid catalyst either in solid form or as a liquid supported on a solid, inert material.
Claims5
A process for the production of an alkylphosphine which comprises continuously reacting an olefin and a phosphine in the vapor phase, at a pressure sufficient to insure flow of the reactants, and in the presence of a solid, non-oxidizing, mineral acid or a liquid, non-oxidizing, mineral acid supported on a solid, inert material, continuously cooling the resultant reaction media so as to condense the resultant alkyl phosphine and recovering the condensed alkyl phosphine in a yield exceeding 90 weight percent based on consumed phosphine and 90 weight percent based on consumed olefin and containing less than 1 ppm of germanium, sulfur, metallic or oxidizing impurities.
Dependencies are inferred from the claim text.