Donald R. Stevenson - Dover OH Daniel L. Clark - Dover OH John C. Debevec - Dover OH Charles N. Slater - Houston TX Carroll W. Larke - Zoar OH
Assignee:
Dover Chemical Corporation - Dover OH
International Classification:
C07F 908
US Classification:
558 95
Abstract:
An improved process for the preparation of tris(nonylphenyl) phosphite is described which includes the steps of combining at least a 4 weight percent excess of nonylphenol (preferably 8 weight percent excess) with PCl. sub. 3 with agitation and heating sufficient to liberate HCl formed during the synthetic reaction as a by-product and removing the excess nonylphenol from the tris(nonylphenyl) phosphite by thin film distillation to reduce the residual chloride level to 90 ppm or less, an acid number of 0. 1 or less and a nonylphenol content after stripping of 0. 1 weight percent or less. The temperature of the reaction was from room temperature to 130. degree. C. , and the temperature of the evaporator which removes the excess nonylphenol is from 100. degree. C. to 350. degree. C. , preferably from 150. degree. C. to 250. degree. C. , under a system vacuum of from 0.
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