As a sucrose derivative, fatty acid sucrose ester is a safe, non-toxic, odor-free, non-polluting polyol-type non-ionic surface with excellent performance, no side effects, no irritation, good stability, and complete biodegradability. active agent. It can effectively reduce the surface tension of water, and has excellent performance in wetting, dispersing, solubilizing, foaming, emulsifying, and detergency. At the same time, it also has insecticidal and bacteriostatic properties. Therefore, it has strong adaptability and wide application range. At present, it has been widely used in food industry, daily chemical industry, pharmaceutical industry, textile, agriculture and animal husbandry and other fields, especially as emulsifier, dispersant, foaming agent, wetting agent and cleaning agent in food industry; Cosmetics, detergents, etc. in the chemical industry.
The invention CN200910029594.8 proposes a new ultrasonic synthesis process of sucrose caprylate, and synthesizes high monoesterified caprylic acid sucrose ester in high yield. The product has good hydrophilicity and thermal stability. The technical scheme of the present invention: an ultrasonic synthesis method of sucrose caprylate, using sucrose and ethyl caprylate as raw materials, potassium carbonate as a catalyst to carry out acylation reaction, the molar ratio of sucrose and ethyl caprylate is 2-2.5:1, with Dimethyl sulfoxide was used as the reaction solvent, the substrate sucrose concentration was controlled at 1 mol/L, the reaction temperature was 70-80 °C, the catalyst accounted for 9%-13% of ethyl octanoate, and the reaction pressure was 11kPa under the condition of The ultrasonic reaction was carried out for 2h in an ultrasonic cleaner with a power of 100W and an operating frequency of 40KHz. After the reaction, most of the solvent was evaporated under reduced pressure, and the distillation residue was dissolved in a sodium chloride solution with a mass concentration of 25% and a n-butanol solution under stirring. The sodium chloride solution: n-butanol V/V=1:1 , the liquids were separated, the organic phase was washed twice with a small amount of water, dried over anhydrous Na2SO4, and the solvent was removed. After the residue was washed twice with ethyl acetate, it was vacuum-dried at 45°C to constant weight to obtain a white waxy solid with a yield of 75%. % Sucrose Caprylate. CN200910029594.8 adopts green synthesis technology to synthesize sucrose octanoate with high yield. This method not only greatly shortens the reaction time, but also has high reaction selectivity, and the content of monoester in the product reaches 92%. The HLB value of the synthesized sucrose caprylate is greater than 10, has good hydrophilicity and good thermal stability, and can exist stably below 150°C.