Stauffer Chemical Company

Karl E Reineke

Edward D Weil

W Elliot Bay

W Elliott Bay

Dialkylphenylphosphonates are prepared by the reaction of a metal alkoxide with a phenyl phosphonic dihalide. The reactants are combined to give a temperature rise to 60.degree. C. within 15 minutes, resulting in improved yields and assay of product.

Method of preparing dialkylphenylphosphonates

There is disclosed an improved process for the addition of phospines to alpha-olefins at high yields and conversions. The process involves the absence of a catalyst whose residues could interfere with the utility of the product, such as n-hexyldiphenylphosphine, as a ligand. Simple thermal reaction is used at temperatures of at least 200.degree. C., most preferably 250.degree. C.-350.degree. C. The pressure is preferably at least atmospheric. Preferred reactants, products, and processing conditions are also disclosed. Batch processes are exemplified and continuous processes proposed.

Addition of phosphines to alpha-olefins

An improved process is disclosed for preparing alkyldiarylphosphines and related compounds. Typically, diphenylphosphinous chloride is reacted in solution with an excess of an alkali metal; and the reaction product reacted with chlorohexane thereby forming hexyldiphenylphosphine. The improved process obtains greater yields, by use of critical amounts of alkali metal; use of a single reactor rather than two reactors; preinitiation of the first stage reaction; reduction of temperatures to increase reaction rate under certain conditions; and preferred reactants and physical form thereof. Novel products include behenyldiphenylphosphine.

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Mohegan Lake, NY, United States of America

Karl E Reineke