Improvements in or relating to the treatment of soya beans

摘要

517,997. Treating soya beans. PLEWS, W. J. Aug. 19 1938, No. 24474. Convention date, Nov. 27, 1937. [Class 58] To hull and to disembitter soya beans they are submitted to substantial steam pressure which is subsequently suddenly released. The moist soya beans, with or without extra water, may be heated in a rotating container until at least a part of the moisture is converted into steam the container then being suddenly opened: or the beans are heated in the container till part of the moisture is converted into steam, part or all of this steam being allowed to escape, steam under pressure then being forced into the container and the container being suddenly opened after an appropriate period of treatment which is about two or three minutes: as a third method the beans are placed in a closed container, such as that described in Specification 472.466, and steam superheated about 100' to 200‹F at a substantial pressure, e.g., in general between 50 and 3001bs. per sq. inch is introduced into the container the pressure being released after a period of treatment of from thirty-five seconds to five minutes. The beans thus treated are expanded, porous and easily friable between the fingers, and the hulls, which flake off during the treatment, are dry and brittle. The process may be applied to granulated soya beans or to beans that have previously been hulled or disembittered.