Patent ID: 6444836
Filing Date: 2002-09-03
Classification: C07F

Abstract:
A process for manufacturing organic phosphites comprising:a) reacting a hydroxyl-containing compound with a phosphorous compound; b) desorbing residual hydroxyl-containing compound in the reaction product in a desorbing column employing an inert gas as a desorbing agent; wherein: an effluent stream from the desorbing column is about at least 99.5 wt. % pure organic phosphites, and wherein said hydroxyl-containing compound is a phenolic compound, said phosphorous compound is a phosphorous halide, and said organic phosphites are selected from organic phosphites of the formula: (RO)2PRâ€”Râ€ƒâ€ƒ(I) orPâ€”(OR)3â€ƒâ€ƒ(II) where each R is independently selected from alkyl, aryl, alkaryl, aralkyl and substituted alkyl, aryl, alkaaryl and arakyl groups.