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:
Nov. 06, 1990
Filed:
Aug. 31, 1988
Applicant:
Inventors:
Willi Wuest, Ratingen-Hoesel, DE;
Wilfried Raehse, Duesseldorf, DE;
Guenther Just, Hilden, DE;
Dieter Kuehling, Monheim, DE;
Siegfried Emde, Duesseldorf, DE;
Erhard Kuehn, Willich, DE;
Assignee:
Henkel Corporation, Ambler, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
536 56 ; 210348 ; 210367 ; 210374 ;
Abstract
Process and means for purifying cellulose ethers without flocculation points or with relatively high flocculation points (up to 95.degree. C.) and thermoplastic, i.e. highly propoxylated, products made from cellulose in any form, the crude product is first suspended and the suspension liquid subsequently separated in a reverse filter centrifuge a single-stage or multistage wash can be carried out. The filter cake is discharged by reversal of the filter cloth of the centrifuge.