Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus esters
Patent
1998-04-16
1999-06-29
Ambrose, Michael G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus esters
C07F 96574
Patent
active
059170760
ABSTRACT:
A process for producing organo-phosphites of the formula ##STR1## wherein R.sup.1 and R.sup.2 are each 2,4-di-tert-butyl and R.sup.3 is hydrogen is provided. The process involves heating a reaction mixture containing pentaerythritol wherein the pentaerythritol has an average particle size of about 250 microns or less, preferably the pentaerythritol has an average particle size of about 150 microns or less, phosphorous trihalide, a phenolic compound of the formula: ##STR2## wherein each R.sup.1 and R.sup.2 is t-butyl and R.sup.3 is hydrogen, a solvent selected from the group consisting of heptane, hexane, octane, xylene, toluene, and mixtures of the solvents containing at least one of the aforementioned and a catalyst. The process utilizing the aforementioned pentaerythritol particle size has the unexpected advantages of short reaction times as compared to the same process using a larger pentaerythritol particle size.
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Ambrose Michael G.
General Electric Company
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