Tate & Lyle Ingredients Americas LLC

Walter C Yackel

Donald W Harris

Patricia A Richmond

Ethel D Stanley, Legal Representative

Thomas A Eilers

Eric A Marion

Keith D Stanley

Warren L Nehmer

Geoffrey A R Nobes

Ethel D Stanley

A process for producing an enzyme-resistant starch uses an aqueous feed composition that comprises (i) starch that contains at least about 50% by weight amylose, (ii) water, and (iii) alcohol. The concentration of starch in the feed composition is between about 5% and about 50% by weight, and the pH of the feed composition is between about 3.5 and about 6.5. In a first heating step, the feed composition is heated to a temperature between about 130-170&#xb0; C. for about 0.1-3.0 hours. The feed composition is cooled to a temperature between about 4-70&#xb0; C. for about 0.1-6.0 hours. In a second heating step, the feed composition is heated to a temperature between about 110-150&#xb0; C. for about 0.1-10.0 hours. The starch is separated from the majority of the water and alcohol and is dried.

Enzyme-resistant starch and method for its production

A process for producing alpha-amylase resistant starch comprises extruding a feed starch at a temperature in the range of about 60-220&#xb0; C., thereby producing a product alpha-amylase resistant starch. The feed starch can be in the form of an aqueous slurry or paste that has a dry solids concentration of at least about 50% by weight. The process optionally can include the additional step of heating the product starch to a temperature of at least about 90&#xb0; C. in the presence of moisture, to increase further the alpha-amylase resistance of the product.

Production of enzyme-resistant starch by extrusion

A process for producing an enzyme-resistant starch uses an aqueous feed composition that comprises (i) starch that contains at least about 50% by weight amylose, (ii) water, and (iii) alcohol. The concentration of starch in the feed composition is between about 5% and about 50% by weight, and the pH of the feed composition is between about 3.5 and about 6.5. In a first heating step, the feed composition is heated to a temperature between about 130&#x2013;170&#xb0; C. for about 0.1&#x2013;3.0 hours. The feed composition is cooled to a temperature between about 4&#x2013;70&#xb0; C. for about 0.1&#x2013;6.0 hours. In a second heating step, the feed composition is heated to a temperature between about 110&#x2013;150&#xb0; C. for about 0.1&#x2013;10.0 hours. The starch is separated from the majority of the water and alcohol and is dried.

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Blaine, WA, United States of America

Walter C Yackel