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Title: Process for recovering organic vapors from air

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.

Inventors:
 [1]
  1. (Mountain View, CA)
Issue Date:
Research Org.:
MEMBRANE TECHNOLOGY & RES INC
OSTI Identifier:
865672
Patent Number(s):
4553983
Assignee:
Membrane Technology and Research, Inc. (Menlo Park, CA) OSTI
DOE Contract Number:  
AC07-83ID12379
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; recovering; organic; vapors; air; concentrating; vapor; feed; stream; content; 20; 000; ppm; volume; semipermeable; membrane; provided; permeate; selectivity; 50; measured; ratio; permeability; nitrogen; times; 10; -7; cm; stp; hg; passed; providing; pressure; creating; partial; vacuum; passes; preferentially; form; depleted; enriched; compressed; condensed; recover; liquid; partial vacuum; semipermeable membrane; permeable membrane; air stream; feed stream; organic vapor; recovering organic; organic vapors; vapor content; /95/96/585/

Citation Formats

Baker, Richard W. Process for recovering organic vapors from air. United States: N. p., 1985. Web.
Baker, Richard W. Process for recovering organic vapors from air. United States.
Baker, Richard W. Tue . "Process for recovering organic vapors from air". United States. https://www.osti.gov/servlets/purl/865672.
@article{osti_865672,
title = {Process for recovering organic vapors from air},
author = {Baker, Richard W.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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