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US 7,678,555 B2Granted
Production of crystalline short chain amylose
AssigneesTate & Lyle Ingredients Americas LLC, Novozymes A/S
InventorsBarrie Norman, Sven Pedersen, Keith D. Stanley, Patricia A. Richmond
Life of this patent
Estimating the term…
Abstract
A process for producing a starch comprises treating a feed starch that comprises amylopectin with glucanotransferase to produce a chain-extended starch, and treating the chain-extended starch with a debranching enzyme to produce a starch product that comprises amylose fragments. At least about 38% by weight of the amylose fragments have a degree of polymerization (DP) of at least about 35.
Claims17
A process for producing a starch, comprising:
- treating a feed starch that comprises amylopectin with glucanotransferase in aqueous solution or suspension at a temperature of about 70-100° C. and a pH of 5.0-6.0 to produce a chain-extended starch, wherein the glucanotransferase is used in a dosage of about 9 mg enzyme protein to about 13.5 mg enzyme protein per 100 grams of feed starch;
- treating the chain-extended starch with a debranching enzyme to produce a starch product that comprises amylose fragments;
- heating the starch product in aqueous solution or suspension at a temperature of at least about 90° C.;
- and
- membrane filtering a solution or dispersion of the starch product to increase the concentration of amylose fragments that have a degree of polymerization (DP) from 37 to 100;
- wherein from about 38% by weight to 51.2% by weight of the amylose fragments have a degree of polymerization (DP) from 37 to 100;
- and wherein the starch product has a polydispersity of about 2-4.
4 more elements
Dependencies are inferred from the claim text.