Patent ID: 8278490

Claim:
A process for the in-situ formation of a bis(alkylphenyl)pentaerythritol diphosphite wherein R is independently selected from the group consisting of C 1-22 alkyl, C 1-22 alkoxy, C 3-22 alkenyl, C 6-40 aryl, C 7-40 cycloalkyl, C 7-40 cycloalkylene, C 7-40 alkylaryl, C 7-40 arylalkyl, C 7-40 aryloxy, and n is an integral value ranging from 2 to 4 inclusive, comprising the steps of: adding phosphorus trichloride (PCl 3 ) to a reaction vessel previously charged with pentaerythritol adding a phenol selected from the group consisting of alkylphenol and arylalkylphenol wherein R and n are as defined previously, the phenol acting as both a reactant and a solvent for the reaction; and adding a phase transfer catalyst.