Process for the formation of hydrocarbyl BIS(hydrocarbyl phospha

Details Process for the formation of hydrocarbyl BIS(hydrocarbyl phospha Process for the formation of hydrocarbyl BIS(hydrocarbyl phospha

1994-11-01

2000-10-24

Ambrose, Michael G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

C07F 909, C07F 912, C07F 911

Patent

active

061369977

ABSTRACT:
A process for the synthesis of a hydrocarbyl bis(dihydrocarbyl phosphate), such as a hydrocarbyl bis(diaryl phosphate), comprises the reaction of an unstable hydrocarbyl-containing diol, such as an aromatic group-containing diol, with a dihydrocarbyl halophosphate, such as diphenyl chlorophosphate, in the presence of a Lewis acid catalyst, such as magnesium dichloride, in the additional presence of an effective amount (e.g., up to about 100% by weight of diol and halophosphate) of a liquid hydrocarbon, such as an aliphatic hydrocarbon, like heptane, or an aromatic hydrocarbon, such as toluene, to enhance the removal of hydrogen halide by-product and thereby increase the yield of hydrocarbyl bis(dihydrocarbyl phosphate).

REFERENCES:
patent: 3254973 (1966-06-01), Giammaria et al.
patent: 3642959 (1972-02-01), Nichols
patent: 3737487 (1973-06-01), Nichols
patent: 4133846 (1979-01-01), Albright
patent: 4343732 (1982-08-01), Zama et al.
Derwent Patent Abstract No. 05192 J/49 (Abstract JP 57/174,331 of Oct. 27, 1982.

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