Henkel Kommanditgesellschaft Auf Aktien

Klaudia Bischof

Uwe Ploog

Guenter Uphues

Kaspar Schlueter

Pavel Sladek

Kenan Kenar

Process for reducing the residual content of free alkylating agent in

Textile treatment preparations

Textile softeners

In the production of monoalkylphosphoric acid esters, at least one fatty alcohol or mixtures of fatty alcohols containing from 8 to 18 carbon atoms and preferably from 12 to 14 carbon atoms in a straight chain is/are reacted with a 0.2 to 2 molar excess of polyphosphoric acid at a temperature of 60.degree. to 130.degree. C.; following an after-reaction time of 120 to 300 minutes at a temperature of 95.degree. to 105.degree. C., the product of this reaction is slowly hydrolyzed at 90.degree. to 100.degree. C. with 0.5 to 1.0 mole water, based on the quantity of phosphorus atoms in the reaction mixture, the hydrolysis product is neutralized to a level of from 40 to 65% and preferably to a level of from 50 to 60%, based onthe acid number, with dilute alkali metal hydroxide, and the two phases formed are separated from one another after a residence time of 30 to 180 minutes at a temperature in the range of from 50.degree. to 95.degree. C.

Process for the production and isolation of monoalkyl phosphoric acid

Growing community of inventors

Werne, Germany

Klaudia Bischof