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Method for deacidifying a fluid stream and washing liquid used in such a method

  • US 7,749,309 B2
  • Filed: 03/04/2003
  • Issued: 07/06/2010
  • Est. Priority Date: 03/12/2002
  • Status: Active Grant
First Claim
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1. A process for deacidifying a fluid stream comprising an acid gas as an impurity, comprising:

  • intimately contacting the fluid stream with a scrubbing liquid,separating a fluid stream substantially free of the acid gas from a scrubbing liquid laden with acid gas,wherein the scrubbing liquid is an aqueous solution comprising;

    a) from 3 to 60% by weight 3-dimethylamino-1-propanol andb) from 0.1 to 50% by weight piperazine,and said contacting is performed at a total pressure of 2 bar or higher.

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