Process of making low dioxane alkoxylate phosphate esters

Details Process of making low dioxane alkoxylate phosphate esters Process of making low dioxane alkoxylate phosphate esters

1994-12-01

1995-10-31

Richter, Johann

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

Organic compounds

Phosphorus esters

558186, C07F 909

Patent

active

054631017

ABSTRACT:
This invention relates to first stage phosphation processes which utilize a unique phosphation reagent that esterifies ethoxylated alcohols under mild reaction conditions, thus realizing reduced initial 1,4-dioxane production followed by formation of a dioxane-water azeotrope and the vacuum stripping at above about 100 torr of the azeotrope. This easily achieves product 1,4-dioxane levels below about 15 ppm based on the total ester weight.

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