Hoechst Aktiengesellschaft

Dirk Buhring

Fritz Engelhardt

Klaus Delpy

Ralf Zerrer

Viliam Tittel

Process for the preparation of flowable, anhydrous acyloxyalkanesulfonates and their use In the process of the invention, in the context of the esterification of fatty acids with hydroxyalkanesulfonates, the reaction product (molten mass) at 180.degree. to 250.degree. C. is sheared in such a manner during the cooling to 150.degree. to 50.degree. C. that the mean particle size of the product is &lt;100 .mu.m. The acyloxyalkanesulfonate product thus obtained is still highly flowable, pumpable and the like, even at temperatures in the range from 60.degree. to 100.degree. C. and be stored in the fluid state without change at these temperature even over a long period.

Process for the preparation of flowable, anhydrous

Process for the preparation of acyloxyalkanesulfonates having improved properties The acyloxyalkanesulfonates are obtained in accordance with the invention by direct esterification in which at least one fatty acid is esterified with at least one ammonium hydroxyalkanesulfonate of the formula HO-A-SO.sub.3.sup.- + NR.sup.1 R.sup.2 R.sup.3 R.sup.4 in which A is a C.sub.2 -C.sub.4 -alkylene and R.sup.1.sub.1 R.sup.2.sub.1 R.sup.3 and R.sup.4 are hydrogen or a C.sub.1 -C.sub.4 -alkylene group in the presence of an esterification catalyst at a temperature of not more than 200.degree. C., with removal of the water present. This process gives a product of high acyloxyalkane-ammonium sulfonate content without the need for a consistency regulator to be added.

Process for the preparation of acyloxyalkanesulfonates having improved

The present invention relates to a process for the preparation of ether-sulphonates of high purity, substantially free from extraneous salts, of the general formula I

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Frankfurt am Main, Germany

Dirk Buhring