Preparation and purification of ionic liquids and precursors

  • US 20070235696A1
  • Filed: 12/22/2006
  • Published: 10/11/2007
  • Est. Priority Date: 06/21/2002
  • Status: Active Grant
First Claim
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1. A method for preparing ionic liquid substantially free of impurities, comprising:

  • generating ionic liquid precursor comprising impurities;

    exposing the ionic liquid precursor to a purification agent comprising carbon, thereby substantially removing the impurities from the precursor and generating a purified ionic liquid precursor; and

    using the purified ionic liquid precursor to prepare ionic liquid.

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