A method for the production of peanut globulin

摘要

Peanut globulin is prepared from comminuted peanut material containing no appreciable amount of fragments of testa by treating the said peanut material with a dilute alkaline solution of such concentration that a pH of at least 11.0 is maintained during the extraction, separating the alkaline extract from undissolved matter and thereafter precipitating the globulins from the alkaline extract. It is preferable that the peanut material is substantially free of oil, before extraction. The extraction may be effected by sodium hydroxide or potassium hydroxide solution which is preferably several times greater in weight than the peanut material, and which is preferably of such a strength that the globulin is not subjected to a pH greater than 11.5 for an appreciable time. In the example, peanuts are crushed by passing them first through loosely set rollers and then through more closely set rollers, and the product is blown by a draught. This is repeated with more closely-set rollers and the product placed on a vibrating screen while air is sucked through. The resulting testa-free material is extracted with petrol to remove oil and the petrol evaporated off. The ground meal is then moistened with water and treated with sodium hydroxide solution. The product after stirring, centrifuging and filtering is acidified with sulphur dioxide and the precipitated globulins washed with water. Globulins prepared in this way may be made into viscous solutions with sodium hydroxide which do not undergo surface gelation during a spinning process. Specification 553,539 is referred to.