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Diazotization reaction continuous production method in saccharin production process

A technology of production process and production method, which is applied in the field of continuous production of diazotization reaction in the production process of saccharin, can solve the problems of unstable process parameters and product quality, high labor intensity of workers, and high production cost, so as to reduce production cost, The effect of reducing labor intensity and improving stability

Active Publication Date: 2015-03-11
CHINA PINGMEI SHENMA GRP KAIFENG XINGHUA FINE CHEM
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Problems solved by technology

The production method is intermittent production, the process parameters and product quality are unstable, and the labor intensity of workers is high, and the production cost is high

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  • Diazotization reaction continuous production method in saccharin production process
  • Diazotization reaction continuous production method in saccharin production process

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[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] figure 1 The process flow of the continuous production method of diazotization reaction in the production process of saccharin of the present invention is shown. As shown in the figure, the present invention is realized in this way. A continuous production method of diazotization reaction in the production process of saccharin comprises:

[0017] S101: Mixed acid preparation, mix hydrochloric acid and water with a mass concentration of about 31% at a volume ratio of 1:0.30 through a mixing pump and enter a tube mixer to mix and cool down. The temperature of the mixed solution should be cont...

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Abstract

The invention discloses a diazotization reaction continuous production method in a saccharin production process, which comprises the following steps: preparing mixed acid, mixing hydrochloric acid with mass concentration being 31% and water according to volume ratio of 1: 0.30 through a mixing pump and introducing into a tubular type mixer for mixing and then cooling, controlling the temperature of the mixed liquor at 0-30 DEG C; mixing methyl esters mixed liquor and hydrochloric acid solution according to volume ratio of 0.96: 1 through a primary mixing pump and then introducing in a primary reactor for a diazotization reaction, controlling the temperature of the mixed liquor at 0-30 DEG C, then mixing through a secondary mixing pump and then introducing into a secondary reactor for the diazotization reaction, controlling temperature at 0-30 DEG C; after diazotization reaction is completed, introducing the diazo liquid in the next process for a displacement reaction. The traditional intermittent sodium saccharin production process is improved to a continuous mode, the sodium saccharin production technological parameter and product quality stability are increased, labor intensity is mitigated, and production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of saccharin production, and in particular relates to a continuous production method of diazotization reaction in the saccharin production process. Background technique [0002] The traditional diazotization reaction production method in the production process of sodium saccharin is: add the mixed solution of methyl anthranilate, sodium nitrite and water to the mixed solution of hydrochloric acid and water prepared in advance, and carry out heavy nitrogen reaction. In the traditional production process of sodium saccharin, the diazotization reaction is carried out in the reactor. The production method is intermittent production, the process parameters and product quality are unstable, and the labor intensity of workers is high, and the production cost is high. Contents of the invention [0003] The object of the present invention is to provide a continuous production method of diazotization reaction in t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C245/20
Inventor 杨国新
Owner CHINA PINGMEI SHENMA GRP KAIFENG XINGHUA FINE CHEM
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