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US 6,423,833 B1Granted
Functional sugar polymers from inexpensive sugar sources and apparatus for preparing same
OwnerSteven J. Catani, Kathleen S. Laurenzo +2inventors
InventorsSteven J. Catani, Kathleen S. Laurenzo, Juan L. Navia, Robert E. Walkup
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Abstract
A process for preparing functional sugar polymers comprising transferring a monosaccharide or oligosaccharide to an acceptor, removing by-products, separating polymers which have not achieved the desired chain length and recycling these underdeveloped polymers, and an apparatus for producing same.
Claims17
A process to produce straight or branched carbohydrate polymers comprising:
- a) transferring a monosaccharide or oligosaccharide residue from a carbohydrate donor to an acceptor by using an enzyme, thereby forming a reaction mixture containing by-products which inhibit the activity or selectivity of the enzyme and carbohydrate polymers;
- b) removing any by-products from the reaction mixture formed in step a) which may inhibit yield or selectivity of the enzyme;
- c) separating carbohydrate polymers which have not achieved the desired chain length from carbohydrate polymers which have achieved the desired chain length;
- and
- d) recycling the carbohydrate polymers which have not achieved the desired chain length to said transferring step.
2 more elements
A process for producing fructooligosaccharides which are linked via their reducing ends to an alpha-D-glucopyranosyl moiety comprising:
- a) transferring fructose residues from sucrose to a fructooligosaccharide of the formula GFn where G is glucose, F is fructose and n is an integer between 1 and 60 by using a fructosyl-transferase, thereby forming a reaction mixture containing sucrose, glucose and fructooligosaccharides;
- b) removing glucose and fructooligosaccharides having at least the desired value of n from the reaction mixture formed in step a) from fructooligosaccharides which have less than the desired value of n;
- and
- c) recycling the fructooligosaccharides which have less than the desired value of n to said transferring step.
1 more element
Dependencies are inferred from the claim text.