The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 1990
Filed:
Jan. 23, 1990
Herbert Stuhler, Burgkirchen, DE;
Klaus Dullinger, Neuotting, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A process for the sulfation of primary free OH groups of partial esters of aliphatic polyhydric alcohols with SO.sub.3 is described. As solvent, use is made of at least one compound which has a boiling point of 40.degree. to 200.degree. C. at a pressure of 98 kPa, is liquid under the chosen reaction conditions and, in addition to at least one trivalent nitrogen atom, which is linked exclusively to carbon atoms, contains only carbon, hydrogen and optionally ether oxygen atoms. The sulfated partial esters and also their alkali of alkaline earth salts are obtained with a good color and good yield and without the formation of large quantities of salts which pollute the waste water. They may be used, for example, for detergent base materials, synthetic soaps and flotation agents.