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:
Jun. 01, 1982
Filed:
Apr. 30, 1980
Applicant:
Inventors:
Klaus Gerlach, Obernau, DE;
Joachim Behnke, Amorbach, DE;
Wolfgang Rosener, Erlenbach, DE;
Ewald Hohm, Momlingen, DE;
Assignee:
Akzo N.V., Arnhem, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
210651 ; 210708 ; 210799 ; 2105002 ;
Abstract
An ultrafiltration membrane comprised of a linear polyurethane having a hydraulic permeability for water of about 50 to 500 1/m.sup.2 .multidot. h and a separation factor .alpha. of about 2.times.10.sup.-3 to 1.times.10.sup.-4, the permeability being based on determination with a membrane of a thickness of about 0.02 mm, a pressure differential of 1 bar and a temperature of 20.degree. C. and the separation factor .alpha. being established with a 2% oil-water emulsion at 25.degree. C. The membrane is particularly suited for operation of oil-water mixtures or emulsions.