Process for restoring membrane permeation properties

Details Process for restoring membrane permeation properties Process for restoring membrane permeation properties

1995-05-24

1997-05-20

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264340, B29C 7100

Patent

active

056309708

ABSTRACT:
A process for restoring the selectivity of high-flee-volume, glassy polymer membranes for condensable components over less-condensable components or non-condensable components of a gas mixture. The process involves exposing the membrane to suitable sorbent vapor, such as propane or butane, thereby reopening the microvoids that make up the free volume. The selectivity of an aged membrane may be restored to 70-100% of its original value. The selectivity of a membrane which is known to age over time can also be maintained by keeping the membrane in a vapor environment when it is not in use.

REFERENCES:
patent: 5281255 (1994-01-01), Toy et al.
Yampol'skii et al., "Transport Characteristics and Other Physicochemical Properties of Aged Poly(1-(trimethyl)-1-propyne)" Jour. of Polymer Sci. 48, pp. 1935-1944. (1993).
Odani et al., "Design of Polymer Membranes for Gas Separation" in Polymers for Gas Separation, pp. 132-135, N. Toshima(Ed.), New York, (1992).
Nakagawa, T. et al. "Polyacetylene Derivatives as Membranes for Gas Separation", Gas Separation & Purification, vol. 2 (1988), pp. 3-8.

Affiliated with

Also associated with

Rating

Process for restoring membrane permeation properties does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for restoring membrane permeation properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for restoring membrane permeation properties will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1721900