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Method for purifying gases

  • US 6,187,277 B1
  • Filed: 06/04/1999
  • Issued: 02/13/2001
  • Est. Priority Date: 06/04/1999
  • Status: Expired due to Fees
First Claim
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1. A method of removing SO2 from a gas, comprising contacting the SO2 containing gas with an aqueous solution of dimethyl sulfoxide while maintaining the pH of the aqueous solution acidic to dissolve SO2 in the aqueous solution of dimethyl sulfoxide and thereafter reacting the dissolved SO2 with alkaline earth metal ions to form a solid alkaline earth sulfate or a solid alkaline earth sulfite or mixtures thereof.

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