Method for synchronously extracting soybean oil, soybean milk powder and soybean dietary fiber by aqueous enzymatic method

Abstract

The invention relates to a method for synchronously extracting soybean oil, soybean milk powder and soybean dietary fiber by an aqueous enzymatic method, which belongs to the technical field of plant grease processing. The method comprises the following steps: 1) dehulling soybeans and crushing the soybeans, extruding and puffing the material to obtain a puffed product; 2) adding water into an enzymatic hydrolysis reaction vessel, heating steam and adding the puffed product to obtain a mixed liquor, performing alkaline extraction on the mixed liquor, adding alkali protease for performing enzymatic hydrolysis, using a horizontal centrifuge after enzymatic hydrolysis is carried out for performing centrifugation to obtain an emulsified oil, a hydrolysate and residues; 3) using a disk centrifuge for performing centrifugation on the emulsified oil to obtain the soybean oil and a water phase, adding the water phase into the hydrolysate for concentration, and drying the material to obtain the soybean milk powder; and 4) adding water for mixing the water and the residues for homogenizing and drying a mixture to obtain the soybean dietary fiber. The method has the advantages of simple process, less enzyme usage amount, short reaction time, and low cost. The prepared high-quality soybean oil can obtain the high-nutrition partly-defatted soybean milk powder and high-oil high-protein soybean dietary fiber, and is suitable for industrial continuous production.

Description

technical field [0001] The invention belongs to the technical field of vegetable oil processing, and mainly relates to a method for synchronously extracting soybean oil, soybean milk powder and soybean dietary fiber by an aqueous enzymatic method. Background technique [0002] The traditional methods of producing vegetable oil are mainly pressing and leaching. The pressing method has a simple process and less supporting equipment, which can maintain the special flavor of the product, but the oil extraction rate is low, the energy consumption is high, and the cost is high. Moreover, the protein denaturation of the cake after pressing is serious, and the protein utilization rate is low, resulting in a serious waste of vegetable protein. . The leaching method has high production efficiency and low residual oil rate, but this method requires a lot of equipment, large investment, large loss of oil flavor and residual organic solvents, and requires refining treatment, and also po...

AI Technical Summary

Problems solved by technology

At present, the extraction of soybean oil by aqueous enzymatic method is mostly limited to laboratory research. Due to the problems of high cost of enzyme preparation, long reaction time, and difficulty in demulsification in the process of extracting soybean oil by aqueous enzymatic method, it is rarely put into production practice. There are few studies on the simultaneous industrial production of soybean oil, soybean milk powder and soybean dietary fiber by aqueous enzymatic method