Continuous coupled jet-cooking/spray-drying process and novel pr

Details Continuous coupled jet-cooking/spray-drying process and novel pr Continuous coupled jet-cooking/spray-drying process and novel pr

1992-07-27

1994-06-07

Breneman, R. Bruce

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

127 28, 127 32, 127 65, 127 67, 426661, 536102, C08B 3000, C08F 1606, C08F 800

Patent

active

053186354

ABSTRACT:
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-soluble 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.

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