National Starch and Chemical Corporation

Roger W Rubens

Wadym Jarowenko

Otto B Wurzburg

Martin D Thaler

Jayant K Patel

A process for simultaneously atomizing, cooking, and drying a mixture of starch and water in the exhaust gas stream from a sonic pulse jet combustion engine is described. The process consists of preparing a mixture of a granular starch with water (preferably a starch cake), feeding the mixture into the exhaust pipe of the jet combustion engine, maintaining the resulting mixture of atomized starch, water, and hot gas in the exhaust pipe for a time sufficient to gelatinize and substantially dry the atomized starch, and recovering the pregelatinized starch powder by exhausting the mixture into a collection chamber supplied with a flow of air.

Pulse combustion process for the preparation of pregelatinized starches

The invention discloses a dual derivatizing process for the preparation of cold water swelling starches and foodstuffs thickened therewith. The starch base is first subjected to a primary crosslinking reaction using sodium trimetaphosphate (STMP) according to conventional techniques, then reslurried, treated with additional STMP and drum dried to effect a secondary crosslinking reaction in situ.

Process for preparing cross-linked starches using STMP

Starch is phosphorylated by a virtually pollution-free, continuous process whereby an aqueous reagent solution of a tripolyphosphate, orthophosphate or pyrophosphate salt or a mixture thereof is sprayed onto a moist starch cake on a rotary vacuum filter in an amount sufficient to achieve efficient impregnation of the starch cake without losing significant levels of salt to the effluent. In a preferred embodiment, the reagent solution contains alkali metal tripolyphosphate salt and is obtained by diluting a concentrated solution thereof. The thus-impregnated starch is subsequently dried and heat-reacted by known procedures to produce an orthophosphate starch monoester.

Continuous process for phosphorylating starch

The invention discloses a dual derivatizing process for the preparation of cold water swelling starches and foodstuffs thickened therewith. The starch base is first subjected to a primary crosslinking reaction using sodium trimetaphosphate (STMP) according to conventional techniques, then reslurried, treated with additional STMP and drum dried to effect a secondary cross-linking reaction in situ.

Foodstuffs containing crosslinked starches using STMP

Starch is phosphorylated by an improved pollution-free process which involves forming a reagent solution of an alkali metal tripolyphosphate salt in water having 20- 36% by weight of the salt dissolved therein, forming a starch cake containing no more than 45% by weight moisture, adding 2 - 30% by weight of the tripolyphosphate salt reagent solution to the starch cake, and drying and heat-reacting the thus-impregnated starch. In this process more efficient impregnation of the starch is achieved. The impregnation is preferably effected in a centrifuge.

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Somerville, NJ, United States of America

Roger W Rubens