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Removal of undesirable material from water-soluble polysaccharide ethers

  • US 4,988,807 A
  • Filed: 04/09/1990
  • Issued: 01/29/1991
  • Est. Priority Date: 01/23/1989
  • Status: Expired due to Fees
First Claim
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1. A method of removing color bodies from a water-soluble polysaccharide ether containing such color bodies comprising:

  • (a) contacting an aqueous solution which comprises a water-soluble polysaccharide ether containing color bodies, with an anion exchange resin in an amount and at conditions effective to associate the color bodies with the resin; and

    (b) separating the resin from the polysaccharide ether so as to result in the polysaccharide ether having a reduced concentration of color bodies;

    wherein the water-soluble polysaccharide ether is in the aqueous solution in a concentration greater than about 1 weight percent.

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