Continuous reactor for oleic acid ester exchange reaction and purifying method of fatty acid diglyceride

Abstract

The invention relates to a continuous reactor for oleic acid ester exchange reaction. The continuous reactor comprises a reactor body, wherein a catalyst solution adding pipe is arranged at the top part of the reactor body; the upper part of the reactor body is provided with a reaction generation matter outlet; the reaction generation matter outlet extends to the top part of the reactor; a greaseadding pipe is arranged at the lower part of the reactor body, and extends to the bottom part of the reactor; an air exhaust pipe is arranged at the bottom part of the reactor body, and is connected with a vacuum pump; a mixed solution heater and a plurality of reaction circular plates a and reaction circulate plates b are arranged in an inner cavity of the reactor body; the reaction circular plates a and the reaction circular plates b are alternatively arranged in the inner cavity of the reactor body; a multi-stage reaction cavity is formed between the adjacent reaction circular plates a andreaction circular plates b. The purifying method of the fatty acid diglyceride using the continuous reactor for oleic acid ester exchange reaction is characterized in that a molecule distillation purifying technology of distillation equipment comprises five stages of molecule distillation purifying production technology, so as to improve the production efficiency, save energy and decrease energy consumption.

Description

technical field [0001] The invention relates to the fields of oil industry and oil chemical industry, in particular to a continuous reactor for oil transesterification and a method for purifying fatty acid diglyceride. Background technique [0002] Diacylglycerol (DG) is a structural lipid in which one fatty acid in triacylglycerol (TG) is replaced by a hydroxyl group. DG is a trace component of natural vegetable oil and an endogenous intermediate product of fat metabolism in the body. It is a food ingredient generally recognized as safe (GRAS). In recent years, it has been found that dietary DG has the functions of reducing visceral fat, inhibiting weight gain, and lowering blood lipids, so it has received extensive attention. [0003] DG has many advantages such as safety, nutrition, good processing suitability, and high human compatibility. Diacylglycerol is a product obtained by esterifying glycerol (glycerol) with two fatty acids, referred to as diacylglycerol and digl...

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Problems solved by technology

[0006] The current oil transesterification reaction is generally a batch reactor, which has a small output and low efficiency. The inventor once invented a continuous diacylglycerol reactor CN201210191389.3, and a catalyst glycerol solution is added to the upper part of the reactor body. A glycerin heater and a catalyst mixing tank are arranged on the catalyst glycerin solution feeding pipe, and a grease feeding pipe is arranged at the lower part of the reactor body, and the grease feeding pipe is arranged in the reactor body with the nozzle facing down; A grease heater is arranged on the top of the reactor body, and a mixed solution heater is arranged in the inner cavity of the reactor body. Several baffles arranged in a horizontal staggered manner are arranged in the reactor body above the mixed solution heater. There is a reaction product outlet on the top, and an emptying pipe is provided at the bottom of the reactor body; fatty acid diglycerides are separated from the reaction product by multi-stage molecular distillation equipment. When separating, the distillation temperature is 180-260 degrees. Vacuum degree is 0-1000Pa

During the small test of this invention, it was found that its reaction effect was not ideal, the reaction yield was not high, and the multi-stage molecular distillation purification technology was vague, because at that time we had not invented advanced energy-saving molecular distillation equipment without stirring, Therefore, it is necessary to continue to innovate, and now the present invention further improves and innovates on the basis of the original patent (CN201210191389.3)

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