Process for preparation of protein-hydrolysate from soy flour

A process for preparation of protein hydrolysate from soy flour. The process comprises the steps of hydrolyzing an aqueous slurry of defatted soy flour containing 6-30% solid content w/v using proteolytic enzyme of plant origin at a pH of 5-9 and at a temperature of 535 C. under stirring for 30 minutes to 6 hours; inactivating the enzyme by a known manner, neutralizing the pH value of the slurry, separating the solids by a known manner, and drying the clarified liquor so obtained to get the hydrolysate.