Production method of fatty acid diglyceride and special reactor

Abstract

The invention provides a production method of fatty acid diglyceride and a special reactor belongs to the fields of fat deep processing methods and special devices. The production method of the fatty acid diglyceride includes: mixing glycerite heated to a preset temperature with catalysts prior to respectively delivering the catalyst-glycerite mixture and fat heated to a preset temperature to the reactor of a special structure; in the reactor, subjecting catalyst-glycerite mixture and the fat to transesterification and esterification so as to generate a reaction product containing diglyceride and monoglyceride; and finally, separating the fatty acid diglyceride from the reaction product by the aid of multistage molecular distilling devices. The production method of the fatty acid diglyceride is naturally carried out in the reactor, and continuous production can be well achieved without power stirring and with low energy consumption; in high-temperature reaction, the produced fatty acid diglyceride is high-quality under protection of nitrogen; and when adopted, the basic catalyst subjected to weak acid neutralization reaction is prevented from remaining in the fatty acid diglyceride to play a saponated destruction role in the fatty acid diglyceride.

Description

(1) Technical field [0001] The invention relates to a deep processing method and special equipment for oil, in particular to a production method and a special reactor for producing functional oil fatty acid diglycerides from cotton oil. (2) Background technology [0002] Cotton oil is a by-product of the cotton planting industry. Before the reform and opening up, because the refining level of cotton oil was not high, the residue of gossypol, which is harmful to human body, was relatively high in cotton oil. This shadow has been affecting the present for decades. With the current With the advancement of oil refining technology, cottonseed oil adopts advanced degumming, deacidification, dehydration, decolorization, deodorization, dewaxing and other six degassing processes, which can effectively remove gossypol and other harmful substances in cottonseed oil, and the taste is pure and healthy. Cotton oil contains a large amount of essential fatty acids, among which linoleic acid...

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Problems solved by technology

[0004] Currently published patent application: a preparation method of partial glycerides, application number: CN201110083076.1, which mainly passes through a special reactor - fiber reactor (not every manufacturer can afford this special reactor) ), the main product it wants to obtain is monoglyceride, as can be seen from its claim 1. (2) the mol ratio of raw oil and glycerol is 1: 3-30, in addition, this patent application also has There are two flaws: one is that glycerin and alkaline catalyst are simply mixed, which will saponify and lose more oil, and the reaction effect is not good. As can be seen from its embodiment 1 / 2 / 3, this oil glycerin After the proportioning reaction, the monoglyceride should be 42%--50%, and the diglyceride should be more than 50%. This patent application also has other small problems, such as how to deal with its alkaline catalyst, it can only stay in the glycerol monoglyceride. Ester neutralizes diglycerides to prevent alkaline catalysts from remaining in fatty acid diglycerides, which can damage the product by saponification

[0005] In some other published patent applications, the method for manufacturing diglycerides is all reacted with a reaction tank, which is a batch reaction equipment. Their disadvantages are that they cannot be produced on a large scale, and the production process has high energy consumption, resulting in high production cost

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