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AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsJames J. Kasica, James L. Eden
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A continuous coupled jet-cooking/spray-drying process for processing inherently water-dispersible or water-soluble crystalline polymers, such as starches, polygalactomannan gums, and fully hydrolyzed polyvinyl alcohols, is disclosed. it involves the steps of: (a) forming a slurry or paste of the polymer and water, (b) jet-cooking the slurry or paste with steam at a temperature sufficient to fully disperse or solubilize the polymer, (c) immediately conveying and introducing under elevated temperature and pressure the jet-cooked dispersion or solution into a nozzle of a spray-dryer chamber, (d) atomizing the jet-cooked dispersion or solution through the nozzle, (e) drying the atomized mist within the spray-dryer chamber at a temperature sufficient to dry the polymer; and (f) recovering the dried polymer as a water-dispersible or water-insoluble powder. High amylose starches (above about 40% amylose) prepared by this process are characterized in that the starch is substantially non-crystalline and substantially non-degraded. Starch mixtures, mixtures of high amylose starches and other starches, gums, or polyvinyl alcohols can be co-processed.
A pregelatinized, spray-dried, non-granular starch powder of a starch having an amylose content of above about 40%, characterized in that the starch is substantially non-crystalline and substantially non-retrograded.
A pregelatinized, spray-dried, non-granular spray-dried starch powder of a starch having an amylose content of above about 60%, which is prepared by a continuous coupled jet-cooking/spray-drying process comprising the steps of:
A pregelatinized, spray-dried, non-granular starch powder which comprises a mixture of a pregelatinized, spray-dried, non-granular starch powder of a starch having an amylose content of above about 40% and a pregelatinized, non-granular, spray-dried starch powder of a starch having an amylose content of 0 to about 40%, characterized in that the starches are substantially non-crystalline and in that the starch having the amylose content of above about 40% is substantially non-retrograded.
A pregelatinized, spray-dried, non-granular starch powder which comprises a mixture of a pregelatinized, spray-dried, non-granular starch powder of a starch having an amylose content of above about 40% and a pregelatinized, non-granular, spray-dried starch powder of a starch having an amylose content of 0 to about 40%, which is prepared by a continuous coupled jet-cooling/spray-drying process comprising the steps of:
A pregelatinized, spray-dried, non-granular starch powder of a starch base having an amylose content of 0 to about 40%, characterized in that the starch is substantially non-crystalline, has a low displacement density, and has a bulk density higher than the bulk density of the same base starch which is pregelatinized by jet-cooking and spray-drying in two separate steps.
A pregelatinized, spray-dried, non-granular starch powder of a starch having an amylose content of 0 to about 40%, which is prepared by a continuous coupled jet-cooking/spray-drying process comprising the steps of:
A pregelatinized, spray-dried, non-granular starch powder of a starch base having an amylose content of above about 40%, with the proviso that the starch base is not an isolated potato amylose, characterized in that the starch is substantially non-crystalline, is substantially non-retrograded, and has a bulk density higher than the bulk density of the same base starch which is pregelatinized by jet-cooking and spray-drying in two separate steps.
Dependencies are inferred from the claim text.