Method for purifying sugar solutions using polyacrylamides
AssigneeCytec Technology Corp.
InventorsMichael W. Coville, Qi Dai
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Abstract
Methods for the purification of sugar solutions using hydrolyzed polyacrylamides as flocculants are herein described. The hydrolyzed polyacrylamides are prepared from emulsion or microemulsion polymerization of acrylamide monomer, and subsequently hydrolyzed to a degree of hydrolysis of about 10 to about 50 mole %. The hydrolyzed polyacrylamides have a molecular weight of at least about 10,000,000.
Claims28
A method for purifying an aqueous sugar solution, comprising contacting said sugar solution with an effective amount of a polyacrylamide having a molecular weight of at least about 10,000,000 and a degree of anionic charge of between about 10 to about 50 mole %, and being spray dried from an emulsion.
A method for purifying an aqueous sugar solution, comprising contacting said sugar solution with an effective amount of a polyacrylamide having a molecular weight of at least about 30,000,000 and a degree of anionic charge of between about 10 to about 50 mole %.
A method for purifying an aqueous sugar solution, comprising contacting said sugar solution with an effective amount of a polyacrylamide having a solution viscosity of at least about 7 mpa.s and a degree of anionic charge of between about 10 to about 50 mole %.
A composition comprising:
- (a) an aqueous sugar solution;
- and
- (b) a polyacrylamide having a molecular weight of at least about 30,000,000 and a degree of anionic charge of between about 10 to about 50 mole % being present in an amount effective for purifying the aqueous sugar solution.
Dependencies are inferred from the claim text.