Preparation technology and preparation device of 3,3-dimethylbutyraldehyde

Abstract

The invention provides a preparation technology and a preparation device of 3,3-dimethylbutyraldehyde. The preparation technology comprises the following steps: 2-chloro-2-methylpropane and vinyl acetate react under the conditions that dichloromethane is taken as a solvent and aluminum chloride is taken as a catalyst, and a first reaction product containing 1-chloro-3,3-dimethylbutyl acetate is obtained; the first reaction product and water are mixed and input into a thermal fluid passage of a plate heat exchanger, a cooling agent is input into a cold fluid passage of the plate heat exchanger, the first reaction product and the cooling agent are enabled to exchange heat in the plate heat exchanger in a first downstream heat exchange process manner and in a second upstream heat exchange process manner, so that the first reaction product has continuous hydrolysis reaction, and a second reaction product containing 3,3-dimethylbutyraldehyde is obtained; the second reaction product is subjected to distillation separation, and the target product 3,3-dimethylbutyraldehyde is obtained. According to the preparation technology provided by the embodiment of the invention, continuous production can be realized, and the production efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a 3,3-dimethylbutanal preparation process and a preparation device. Background technique [0002] 3,3-Dimethylbutyraldehyde is an important chemical raw material and one of the main synthetic raw materials for medicine and food additive neotame. [0003] In the existing 3,3-dimethylbutyraldehyde synthesis process, the hydrolysis part is completed in the enamel reactor. After a whole batch of materials is put into the enamel reactor, a large amount of ice cubes or water are added to react at low temperature, and at the same time, the interlayer of the reactor is cooled with ice and brine. Because the reaction is relatively fast, the reaction can be completed within 2-15 seconds. The traditional hydrolysis process cannot quickly and evenly mix the two materials, which will cause the problem of local reaction temperature being too high; in order to ensure sufficient hyd...

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Problems solved by technology

[0005] For this reason, an object of the present invention is to propose a kind of 3,3-dimethylbutyraldehyde preparation technology, solves the problem that the original 3,3-dimethylbutyraldehyde hydrolysis process cannot be continuously produced by using a reactor, takes up a lot of manpower, and the hydrolysis Disadvantages of unevenness and large amount of wastewater reduce labor costs and improve production efficiency

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