Process for the preparation of phosphites
AssigneeGeneral Electric Company
InventorsKief Hess, James A. Mahood, Steve Marcus, Charles E. White, Jr.
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Abstract
A process for manufacturing organic phosphites of at least 95.5 wt. % purity, said process comprising: reacting a hydroxyl-containing compound with a phosphorous compound, and desorbing residual hydroxyl-containing compound in the reaction product in a desorbing column employing an inert gas as a desorbing agent.
Claims14
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)2PR—R (I)
- or
- P—(OR)3 (II)
- where each R is independently selected from alkyl, aryl, alkaryl, aralkyl and substituted alkyl, aryl, alkaaryl and arakyl groups.
An improved process for purifying organic phosphites by removing residual hydroxy-containing compounds and organic solvents from said phosphites, said process comprising feeding said organic phosphites to a desorbing column employing an inert gas as a desorbing agent, wherein said inert gas desorbs said residual hydroxy-containing compounds and organic solvents from said phosphites for an end product of at least 99.5 wt. % pure organic phosphites, and wherein
- a) said organic phosphites are selected from organic phosphites of the formula:
- (RO)2P—R (I)
- or
- P—(OR)3 (II)
- where each R is independently selected from alkyl, aryl, alkaryl, aralkyl and substituted alkyl, aryl, alkaaryl and arakyl groups;
- b) said hydroxy-containing compounds are phenolic compounds.
Dependencies are inferred from the claim text.