U.S. patents available from 1976 to present.
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Method and apparatus for removing residual hydrogen from a purified gas

Patent 5238469 Issued on August 24, 1993. Estimated Expiration Date: Icon_subject April 2, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Inventors

Application

No. 862399 filed on 04/02/1992

US Classes:

95/115, Heating and cooling95/116, Inorganic gas or liquid particle sorbed (e.g., vapor, mist, etc.)96/108, SOLID SORBENT APPARATUS96/126, With heat exchange means165/171Means spanning side-by-side tube elements

Examiners

Primary: Spitzer, Robert

Attorney, Agent or Firm

Foreign Patent References

  • 0365490 EP. 04/13/1990
  • 51-028594 JP 03/13/1976
  • 60-030919 JP 02/13/1985
  • 2177079A GB. 01/13/1987
  • 2177080A GB. 01/13/1987

International Class

B01D 053/04

Abstract

The invention relates generally to a gas purification system for the purification of noble gasses and nitrogen. An improved method of purification generally includes the following steps: (a) heating an impure gas; (b) contacting the impure gas with an impurity sorbing material to produce a purified gas; (c) cooling the purified gas to a temperature less than about 100° C.; and (d) contacting the purified gas with a hydrogen sorbing gas to remove residual hydrogen. The system includes an improved heat exchange apparatus for cooling the purified gas and a low temperature hydrogen sorption apparatus.

Other References

  • Application of SAES and HWT gas purifiers for the removal of impurities from helium-hydrogen gas mixtures (Albrecht et al) J. Less-Common Met. 172-174:1157-1167 (1991)
  • Hydrogen isotope sorption and recovery by a non-evaporable getter combined with a chemical compressor material (Doni et al.) J. Vac. Sci. Technol. A. 4(6):2447-2451 (1986)
  • Removal of simple hydrocarbons from a rare gas by a 70%Zr-25%V-5%Fe getter (George et al) Gas Sep. & Purif. 3:50-55 (1989
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