Benzofuranone stabilization of phosphate esters

Details Benzofuranone stabilization of phosphate esters Benzofuranone stabilization of phosphate esters

2006-07-04

2006-07-04

Richter, Johann (Department: 1626)

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

Organic compounds

Phosphorus esters

Reexamination Certificate

active

07071347

ABSTRACT:
A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a benzofuranone (e.g., is 5,7-di-t-butyl-3-(3,4 di-methylphenyl)3H-benzofuran-2-one) for a sufficient length of time to decolorize and stabilize the esters against subsequent color formation.

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