A kind of 2-methylimidazole tubular continuous chemical reaction device and method

Abstract

The present invention proposes a 2-methylimidazole tubular continuous chemical reaction device and method, comprising a raw material tank, a main pipeline, and a PLC automatic control system integrated cabinet, wherein the raw material tank includes an ammonia water tank, an acetaldehyde tank and a glyoxal tank. The main pipeline is provided with a first pipeline mixing reactor, a second pipeline mixing reactor, a third pipeline mixing reactor and a fourth pipeline mixing reactor, and the rear end of the main pipeline is provided with a hot water insulation section through a connecting pipe. One side of the hot water heat preservation section is equipped with a PLC automatic control system integrated cabinet; the present invention can make the raw materials reach continuous The effect of the reaction, while the selectivity of the continuous reaction is higher, the reaction is more sufficient, the quality of the product obtained after the continuous reaction can be improved, and the molar yield of the continuous reaction can be improved. The raw materials will not be in contact with the outside world during the reaction process, and the reaction process is safe. Sex is higher.

Description

technical field [0001] The invention relates to the technical fields of medicine and chemical industry, in particular to a 2-methylimidazole tubular continuous chemical reaction device and method. Background technique [0002] 2-Methylimidazole is white to off-white crystalline powder, hygroscopic, soluble in water, alcohol, acetone and DMF, insoluble in benzene, toxic, irritating and corrosive to skin and mucous membranes, commonly used in production Drug intermediates such as metronidazole and dimetridazole; can be used as curing agents such as epoxy resins, auxiliary agents for fiber dyes, and additives in the preparation of foam plastics. [0003] The liquid-phase mixed reaction usually uses a batch-type tank reaction, which often has the problems of uneven mixing, long reaction time, and low conversion efficiency. In the existing 2-methylimidazole cyclization reaction production process, the first step is to mix ammonia Dialdehyde is added dropwise and mixed, and the s...

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Problems solved by technology

[0004] In view of the above problems, the present invention proposes that the raw materials can achieve the effect of continuous reaction through the first pipeline mixing reactor, the second pipeline mixing reactor, the third pipeline mixing reactor and the fourth pipeline mixing reactor, while the selectivity of continuous reaction Higher, the reaction is more sufficient, can improve the quality of the product obtained after continuous reaction, and solve the problem of insufficient mixing of raw materials in the reaction process, at the same time, the volatility of raw materials is small, will not cause waste of raw materials, and reduce the reaction cost

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