Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1984-07-31
1985-11-19
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55158, 585819, B01D 5322
Patent
active
045539839
ABSTRACT:
A process for recovering and concentrating organic vapor from a feed stream of air having an organic vapor content of no more than 20,000 ppm by volume. A thin semipermeable membrane is provided which has a feed side and a permeate side, a selectivity for organic vapor over air of at least 50, as measured by the ratio of organic vapor permeability to nitrogen permeability, and a permeability of organic vapor of at least 3.times.10.sup.-7 cm.sup.3 (STP) cm/cm.sup.2 sec.cm Hg. The feed stream is passed across the feed side of the thin semipermeable membrane while providing a pressure on the permeate side which is lower than the feed side by creating a partial vacuum on the permeate side so that organic vapor passes preferentially through the membrane to form an organic vapor depleted air stream on the feed side and an organic vapor enriched stream on the permeate side. The organic vapor which has passed through the membrane is compressed and condensed to recover the vapor as a liquid.
REFERENCES:
patent: 2159434 (1939-05-01), Frey
patent: 2388095 (1945-10-01), Stahly
patent: 2617493 (1952-11-01), Jones
patent: 3043891 (1962-06-01), Stuckey
patent: 3062905 (1962-11-01), Jennings et al.
patent: 3367504 (1968-02-01), Westmoreland
patent: 3417870 (1968-12-01), Bray
patent: 3903694 (1975-09-01), Aine
patent: 3911080 (1975-10-01), Mehl et al.
patent: 4115465 (1978-09-01), Elfert et al.
patent: 4119417 (1978-10-01), Heki et al.
patent: 4243701 (1981-01-01), Riley et al.
patent: 4311594 (1982-01-01), Perry
patent: 4386944 (1983-06-01), Kimura
patent: 4444571 (1984-04-01), Matson
McCandless, "Separation of Aromatics and Naphthenes by Permeation Through Modified Vinylidene Fluoride Films", Ind. Eng. Chem. Process Des. Develop., vol. 12, No. 3, 1973 (Jul.), pp. 354-359.
EPA, "Control of Volatile Organic Emissions from Existing Stationary Sources-vol. 1: Control Methods for Surface-Coating Operations", EPA-450/2-76-028.
Rogers et al., "Separation by Permeation Through Polymeric Membranes", Recent Developments in Separation Science, vol. 11, pp. 107 to 155 (1972).
Spangler, American Lab., vol. 7, pp. 36, 37 and 40 to 45, 1975.
Riley et al., "Permeability of Plastic Films and Coatings", Polymer Science and Technology, vol. 6, pp. 375 to 388 (1974).
Ward et al., J. Membr. Sci., vol. 1, pp. 99 to 108, (1976).
Billmeyer, Jr. Textbook of Polymer Science, (Wiley Interscience, N.Y. 1970).
H. Strathmann, "Trennung von Molekularen Mischungen Mit Hilfe Synthetischer Membranen, Sinkopff, Darmstadt (1979).
H. Strathmann et al., "The Formation Mechanism of Asymmetric Membranes", Desalination, vol. 16, pp. 179 to 203 (1975).
Kremen, "Technology and Engineering of ROHA Spiral-Wound Reverse Osmosis Membrane Modules", Reverse Osmosis and Synthetic Membranes, S. Sourirajan (Ed.) National Research Council of Canada Publication No. 15627, Canada, pp. 371-385 (1977).
Membrane Technology and Research, Inc.
Spitzer Robert
LandOfFree
Process for recovering organic vapors from air 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 recovering organic vapors from air, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovering organic vapors from air will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-81770