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Acidum folicum production method without sewerage discharge

A production method and technology for sewage discharge, applied in the direction of organic chemistry, etc., can solve the problems of low yield of crude products, can not solve the problem of sewage well, and achieve the effect of reducing production cost, reducing process water consumption and easy control.

Inactive Publication Date: 2010-12-08
JIHENG PHARMA HENGSHUI CITY
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AI Technical Summary

Problems solved by technology

Both of the above two methods cannot well solve the sewage problem generated in the folic acid production process, and the crude product yield is not very high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] 1. Crude product production: p-aminobenzoyl glutamic acid, trichloroacetone and 2,4,5-triamino-6-hydroxypyrimidine sulfate are reacted in a crude product reaction tank at a reaction temperature of 36°C. After the reaction, open the cooling water valve to lower the temperature in the reaction tank to 20-25°C, press filter through the plate frame, and the filtrate flows into the static flow pool outside. The materials are handed over to the next section for acid dissolution. The filtrate in the static flow pool is waste liquid, which enters the resin treatment tank and is decolorized and adsorbed by resin; the waste liquid after decolorization and adsorption enters the crude product reaction tank for use as process water.

[0015] 2. Acid-dissolving process: Put 1 / 3 of the wet crude product in the previous section into the acid-dissolving pot, stir for 3-5 minutes, add dilute sulfuric acid, start to speed up, as the crude product continues to dissolve, slow down the speed...

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Abstract

The invention discloses a production method of folacin without sewage discharge and a technological process thereof comprises crude product production, acid dissolution process, alkali dissolution process and refining process. The sewage discharge is reduced to zero, meeting the requirements of national environment protection and saving water and cost. The production method of the invention leadsthe yield of crude products to be increased from the original 80 percent to present 85 percent, thus improving product yield so as to decrease waste and improve the rate of production.

Description

technical field [0001] The invention relates to a folic acid production method, in particular to a folic acid production method without sewage discharge in the production process. Background technique [0002] Existing folic acid production technology is: first prepare intermediate product N-p-aminobenzoyl glutamic acid with p-nitrobenzoyl chloride and sodium glutamate, then prepare intermediate product 6 with methyl cyanoacetate, guanidine nitrate, sodium methylate -Hydroxy-2,4,5-triaminopyrimidine sulfate, and finally use the above two intermediate products to prepare crude folic acid, which is purified to obtain pure folic acid. Anhui Keyuan Applied Technology Development Co., Ltd. mentions the production of folic acid intermediate p-aminobenzoic acid by hydrogenation reduction method, the production of 2,4,5-triamino-6-hydroxypyrimidine sulfate by hydrogenation reduction method, and the use of tower type Chloroacetone is produced by the chlorination method, and these th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D475/04
Inventor 马朝华李海霞王二虎董文广焦银蕾马凤霞卢荣磊武胜
Owner JIHENG PHARMA HENGSHUI CITY
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