Preparation of levulose from granular starch
AssigneeCPC International Inc.
InventorRaoul Guillaume Philippe Walon
Life of this patent
Estimating the term…
Abstract
A process for the direct conversion of granular starch to levulose comprising mixing a granular starch with water, bacterial alpha-amylase, glucoamylase and a glucose isomerase derived from Streptomyces albus at a temperature of from about 40.degree. to about 70.degree. C. and a pH of from about 5.0 to about 7.0 and maintaining the starch in essentially granular form until a soluble hydrolysate containing levulose is produced, wherein any residual insoluble starch is in essentially granular, ungelatinized form.
Claims12
A process for the direct conversion of granular starch to levulose comprising forming an aqueous slurry of granular starch, bacterial alpha-amylase, glucoamylase and glucose isomerase derived from Streptomyces albus, at a temperature of at least about 40.degree. C and below the temperature at which the starch is gelatinized, at a pH of from about 5 to about 7 and maintaining the conditions of temperature and pH so that the insoluble starch retains its essentially granular form while a soluble starch hydrolysate containing levulose is produced, whereby any residual insoluble starch remains in essentially granular, ungelatinized form.
Dependencies are inferred from the claim text.