Patent · US Expired

Cellulose ester blend membranes, process for making same and their use

US5611930A · kind A · utility

19Cited by

4References

9Claims

0Family size

Assignee

Deutsche Carbone AG · DE

Inventors

Quang Trong Nguyen · Ludres, FR
Jean M. L. N eel · Villers-lès-Nancy, FR
Hartmut E. A. Br uschke · Schallstadt, DE
Hermann Steinhauser · Riegelsberg, DE

Key dates

Filing date	Oct 13, 1993
Grant date	Mar 18, 1997
Priority date	—
Expiry date	Oct 13, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C41/36
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for removing C.sub.1 -C.sub.3 alkanols from their mixtures with hydrocarbons or heteroatom-containing hydrocarbons wherein the method comprises utilizing a membrane comprising a non-porous separation layer of cellulose ester containing polymeric materials, characterized in that said polymeric material is a polymer blend of a first polymer selected from cellulose esters and at least one second polymer selected from polyvinyl pyrrolidone (PVP), copolymers of vinyl pyrrolidone and vinyl acetate (VP-co-VA), polyethylene glycol (PEG), N,N,-dialkylated polyacrylic amide (DPAA) and cellulose esters other than said first polymer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.