Application and preparation of hydrogenated lysolecithin_Industrial additives

Overview^[1]

In plant-derived lysolecithin, hydrogenated lysolecithin refers to a 2-monoacylglycerol phospholipid or a 1-monoacylglycerol phospholipid. This lysolecithin is produced by phospholipase A1 or A2 as a hydrolase. It is obtained by acting on water-treated soybean lecithin (1,2-diacylglycerol phospholipid), partially hydrolyzing the fatty acid ester component of this phospholipid, and then modifying it. Compared with ordinary soybean lecithin, the characteristics of this hydrogenated lysolecithin are: (1) enhanced oil-in-water emulsification, (2) improved emulsion stability under acidic conditions and coexistence with salt, ( 3) Improved ability to bind to protein and starch, and (4) excellent demoulding or plate release properties. Therefore, the demand for soy lysolecithin has been increasing in recent years.

Apply^[3]

Lecithin is widely used as an emulsifier and solubilizer in the food, feed, pharmaceutical and cosmetic industries. Hydrogenated lysolecithin is available in powder and granular forms and is said to be expected to be used as an emulsifier and solubilizer in foods, cosmetics and pharmaceuticals, as a conditioner, emulsifier, etc. in the field of personal metal oxide pigment care products . Good compatibility with skin. It has excellent antistatic, dispersing, emulsifying and lubricating abilities.

Preparation^[2]

1.2kg of hydrated lecithin (a mixture of phospholipids) with a moisture content of 50%, or the hydrated colloidal substance obtained from the degumming step of soybean oil, is heated at 50°C to 55°C, stirred and mixed with a phospholipase A2 for hydrolysis Enzyme Lecitase 10L (produced by Japan’s Novo Nordisk Co., 11000 units/ml) 0.2ml, enzymatic hydrolysis reaction for 24 hours, when the acid value of the reaction product is 60, add 40ml 5 silane coupling agent N hydroxide For sodium aqueous solution, use the “acid value” determination method in Section 4.2.1 of “Standard Analysis Methods for Fats, Oils and Related Substances” edited by the Japan Petroleum Chemistry Association in 1996 to determine the acid value. Adjust the acid value to less than 45, and heat Increase the temperature to 85°C to 90°C, then maintain it at the same temperature for 30 minutes to perform enzyme inactivation treatment to obtain the target hydrogenated lysolecithin aqueous solution, and then add water to make the weight reach 1.2kg.

Mix 300g of lysolecithin aqueous solution obtained in the above procedure with 300ml of acetone (corresponding to approximately twice the volume of water contained in the hydrogenated lysolecithin solution), and stir the mixed solution to make the hydrogenated lysolecithin phase float on the surface , resulting in separation from the water phase. Remove the lower aqueous phase and separate the upper hydrogenated lysolecithin phase. Extract five times with 700 ml of acetone each time. Remove the free fatty acids (by-products in the hydrogenated lysolecithin production reaction) in this hydrogenated lysolecithin phase by elution. ), oily components such as neutral oil, sterols and residual water derived from the raw materials. The hydrogenated lysolecithin phase obtained after acetone extraction treatment can remove the remaining acetone under reduced pressure to obtain powdery high-quality hydrogenated lysolecithin. Product 64g.