Process for the preparation of granular cold water-soluble starch
AssigneeKansas State University Research Found.
InventorsShyamala Rajagopalan, Paul A. Seib
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Abstract
An improved, atmospheric pressure process for the production of granular cold water-soluble starches is disclosed which comprises forming a slurry of starch granules, water and polyhydric alcohol (e.g. 1,2-propanediol), heating the slurry to convert the starch crystalline structure to a V-type single helix crystalline arrangement or to an amorphous structure, and thereafter separating the converted, cold water-soluble starch granules from the liquid phase. The process can be used to good effect on cereal, tuber, root and legume starches and on many of their cross-linked and substituted forms to yield cold water-soluble starch granules having cold water-solubilities on the order of 70-95%.
Claims12
A process for preparing granular cold water-soluble starch comprising the steps of:
- preparing a slurry of initially cold water insoluble starch granules and a liquid phase including water and a polyhydric alcohol, said slurry having a starch:water weight ratio of from about 1:0.6 to 1:3, and a starch:polyhydric alcohol weight ratio of from about 1:2 to 1:10, both of the foregoing ratios being on a dry starch basis;
- heating said slurry to a temperature of from about 80.degree.-130.degree. C. for a period of from about 3-30 minutes to convert the crystalline structure of said starch granules to cold water-soluble V-type single helix crystalline structure or an amorphous structurel while substantially maintaining the granular integrity of the starch and yielding birefringent starch granules having a cold water solubility of at least about 70%;
- and
- separating the birefringent, converted, cold water-soluble starch granules or fragments thereof from said liquid phase.
Dependencies are inferred from the claim text.