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:
Dec. 30, 1997
Filed:
Feb. 08, 1996
Applicant:
Inventors:
Jurgen Heidlas, Trostberg, DE;
Jan Cully, Garching, DE;
Assignee:
SKW Trostberg Aktiengesellschaft, Trostberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07H / ; C07H / ;
U.S. Cl.
CPC ...
536127 ; 536124 ;
Abstract
A process is described for the purification of carbohydrate derivatives with surface-active properties in which an extraction process is used to liberate the solid or liquid starting material from undesired lipophilic by-products by the use of compressed propane or a proportionate mixture thereof with butane at pressures between 8 and 150 bar and a process temperature below 120.degree. C. In this way it is possible to isolate valuable raw materials in a gentle manner either batch-wise or continuously which meet the high purity requirements, for example in the field of cosmetics.