Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus esters
Patent
1995-02-28
1997-04-01
Richter, Johann
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus esters
C07F 96574
Patent
active
056167679
ABSTRACT:
A process is provided for making 2,2 bisphenyl phosphites and 2,2 biphenyl phosphites. The process provides pure product without requiring a recrystallization step. The process involves reacting phosphorous trichloride with either (a) an aromatic diphenol selected from the group of bisphenyl and biphenyls or (b) a monohydroxy hydrocarbon compound, to induce a first product, and then reacting the first product with the other of (a) and (b) in the presence of an amount of tri-n-alkylamine sufficient to neutralize the hydrochloric acid produced in the second reaction, and utilizing an aromatic liquid hydrocarbon medium and a minimum amount to facilitate precipitation of the resultant aromatic phosphite.
REFERENCES:
patent: 4318845 (1982-03-01), Spivack et al.
patent: 4351759 (1982-09-01), Spivack
patent: 4885326 (1989-12-01), Haruna et al.
patent: 5137950 (1992-08-01), Hobbs et al.
12H-Dibenzo[d,g][1,3,2]Dioxaphosphocins: Synthesis and Evidence for Long-Range Coupling to Phosphorus; Paul A. Odorisio, Stephen D. Pastor, John D. Spivack and Leander Steinhuebel, Phosphorus and Sulfur, 1983, vol. 15, pp. 9-13 (5).
Enlow William P.
Mahood James A.
General Electric Company
Richter Johann
Stockton Laura L.
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