Method for preparing textural soya bean lecithin through molecular control technology

Abstract

The invention discloses a method for preparing 1, 2 substituent textural soya bean lecithin adopting a molecular control technology. Firstly, the soybean phospholipids are treated through acetone extraction and centrifugal treatment for purification, and thus, the soya bean lecithin with higher purity is obtained; then, the lecithin and unsaturated fatty glyceride are mixed proportionally, and texturizing reaction is carried out through phospholipase D; after the reaction is completed, the phospholipase D is inactivated quickly at high temperature, then, the inactivated phospholipase D is removed through the centrifugal method, an appropriate amount of anhydrous acetone is used to remove the fatty glyceride in the system, and finally, the powdery textural soya bean lecithin product is obtained after freezing and drying. The method has the advantages of short reaction time and higher raw material conversion rate; and moreover, the method has more moderate reaction conditions, the solvent has lower toxicity and is easy to remove, and the product is suitable for the fields of food, pharmaceuticals and health care products.

Description

technical field [0001] The invention belongs to the technical field of preparation of textured phospholipids, and in particular relates to a method for preparing textured soybean lecithin by using molecular control technology. technical background [0002] Soy lecithin is lecithin extracted from soybean oil foot, which contains choline, vitamins, minerals, linolenic acid, and sublinolenic acid, among which choline is the main component of soybean lecithin and is also necessary for the human body Nutrients. Lecithin is currently recognized as the most biologically active phospholipid. Due to its high-efficiency emulsification and antioxidant properties and other functional activities, it has attracted extensive attention and has been widely used in food, cosmetics and feed industries. But like other natural phospholipid molecules, the saturated fatty acids contained in soybean lecithin will increase the harmful cholesterol content in the blood, and excessive intake will pose...

AI Technical Summary

Problems solved by technology

The reaction temperature of this method is high, which affects the activity of phospholipids, and the method uses methanol and other toxic organic solvents in the preparation process, thus limiting the application of the product in the fields of medicine, health care and food; "Guangdong Agricultural Science" In the 14th issue of 2011, Yu Gang's article "Research on Preparation of Phospholipids Rich in Polyunsaturated Fatty Acids Catalyzed by Subcritical Fluid Enzyme" proposed the use of subcritical 1,1,1,2-tetrafluoroethane as the medium and the use of lipase Lipozym TL IM catalyzes the transesterification reaction between polyunsaturated fatty acids and soybean phospholipids to prepare textured phospholipids rich in polyunsaturated fatty acids. The subcritical fluid 1,1,1,2-tetrafluoroethane used in this method is highly toxic and its The product is also not suitable for use in the processing fields such as medicine and food; the invention patent with application number 200910193982.X "a method for preparing textured phospholipids and lecithin" provides a method for preparing textured soybean lecithin, Mix phospholipids or concentrated phospholipids with unsaturated oils, choose Novozym435 lipase as the reaction catalyst to catalyze the phospholipid transesterification reaction, replace the 1, 3-position saturated fatty acids of phospholipids, and prepare the finished phospholipids with powdery texture

The reaction conditions of this method are mild, the degree of substitution of the product is high, and the activity is good, but it uses phospholipids or concentrated phospholipids as raw materials to prepare textured soybean lecithin, and the yield is low, resulting in a great waste of unsaturated fatty acids, and the method The reaction time of the method is longer, the energy consumption is larger, and the industrial production cost is higher

Images