×

Process for purification of anhydrous hydrogen chloride gas

  • US 6,719,957 B2
  • Filed: 04/17/2002
  • Issued: 04/13/2004
  • Est. Priority Date: 04/17/2002
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for the purification of hydrogen chloride gas containing contaminants having a boiling point higher than 100°

  • C. comprisinga) compressing hydrogen chloride gas containing a contaminant, b) feeding the compressed hydrogen chloride gas to a first cooling stage in which the temperature of the compressed gas is reduced to at least 20°

    C. above that of a second cooling stage, thereby generating a first condensate stream and a cooled hydrogen chloride gas stream, c) feeding the cooled hydrogen chloride gas stream from the first cooling stage to a second cooling stage in which the temperature of the feed is reduced to at least −

    20°

    C., thereby generating a second condensate stream and a second cooled hydrogen chloride gas stream, d) returning the second cooled hydrogen chloride gas stream to the first cooling stage as cooling medium, and e) removing the first and second condensate streams.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×