Cellulose ester ultra-filtration membranes and their manufacture

Details Cellulose ester ultra-filtration membranes and their manufacture Cellulose ester ultra-filtration membranes and their manufacture

1977-08-15

1979-03-20

Anderson, Philip

Liquid purification or separation

Filter

Material

264 41, 264331, B01D 1304, B01D 3100, B29D 2704

Patent

active

041452950

ABSTRACT:
A process for preparing ultra-filtration membranes and the product thereof, in which a selected cellulosic-ester polymer solution is cast into a thin film, at about ambient temperature, partially dried and immersed in a gelation bath at -20 .degree. to +30.degree. C. The gelation bath contains a sufficient percentage by volume of ethyl alcohol or other organic polar compound to ensure that a flux rate in excess of the initial minimum is achieved. In this way, ultra-filtration membranes having water flux rates selected from within the approximate range 14-10,000 gals./sq.ft./day at 100 psig and a molecular weight cut off above about 15,000, can be produced.

REFERENCES:
patent: 3412184 (1968-11-01), Sharples et al.
patent: 3432584 (1969-03-01), Cannon et al.
patent: 3439074 (1969-04-01), Sharples et al.
patent: 3592672 (1971-07-01), Rowley et al.
patent: 3646179 (1972-02-01), Stana
patent: 3957935 (1976-05-01), Staude

Affiliated with

Also associated with

Rating

Cellulose ester ultra-filtration membranes and their manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cellulose ester ultra-filtration membranes and their manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cellulose ester ultra-filtration membranes and their manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-219858