JPS6416560A - Preparation of tissual concentrated soybean protein - Google Patents

Abstract

PURPOSE:To obtain the titled high-purity soybean protein suitable as a meatlike food, etc., by converting defatted soybean into tissues, extracting saccharides with an aqueous solution of an acid, alkali, etc., separating solid from liquid and then drying the resultant solid. CONSTITUTION:Defatted soybeans 1 after removing fats and oils from soybeans are fed to an extruder processing step 2 and subjected to denaturation and tissue formation treatment. The resultant defatted soybeans subjected to the tissue formation treatment are then dipped and mixed with an aqueous solution of an acid, such as hydrochloric acid or organic acid, an alkali, such as sodium hydroxide or potassium hydroxide, or water-soluble organic solvent, such as ethyl alcohol, to extract and remove saccharides. The obtained mixture solution after the extraction treatment is subsequently fed to a solid-liquid separating step 4, such as wire net filter, and separated into an extract solution and solid. The above-mentioned extract solution is then discharged to the outside of the system and the solid is introduced into a drying step 5 to afford the aimed tissual concentrated soybean protein 6.