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The recovery method of aminothixamic acid

A technology of aminothioxamic acid and a recovery method, applied in the field of medicine, can solve the problems of no reasonable recovery and treatment plan for the three wastes, high pressure on environmental protection, waste of cost, etc., and achieve the effects of considerable profits, reducing pressure on production and environmental protection, and reducing the cost and difficulty of processing.

Active Publication Date: 2022-06-10
SHANDONG JINCHENG PHARMACCUTICAL CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process produces a lot of three wastes, and there is no reasonable recovery and treatment plan for the three wastes, resulting in unnecessary waste of costs and greater pressure on environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The clarity of the AE active ester prepared with foetalin is less than 1, and the content is 99.5%, and the product is qualified.

Embodiment 2

[0059] The clarity of the AE active ester prepared with foetalin is less than 1, and the content is 99.6%, and the product is qualified.

Embodiment 3

[0066] Follow-up with the clarity of the AE active ester prepared by foetalin <1, content 99.5%, the product is qualified.

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Abstract

The invention belongs to the technical field of medicine, and in particular relates to a method for recovering aminothiaxamic acid. The hydrolyzate produced in the production process of aminothiaxamic acid is concentrated by electrodialysis to obtain a concentrated solution, which is pre-decolorized to obtain a first-step crude product of aminothiaxamic acid, which is reversed and decolorized to obtain a second-step crude product of aminothiaxamic acid, which is refined in two steps to obtain a finished product of aminothiaxamic acid; reversed decolorization The first-step crude product of aminothiaxamic acid is dissolved in water, liquid caustic soda is added dropwise to carry out reverse adjustment for dissolving, and then the color is decolorized to obtain the second-step crude product of aminothiaxamic acid. The invention can recycle qualified aminothioxamic acid products, reduces the amount of waste water treatment, has high efficiency, simplicity, environmental protection and high profit, and is suitable for large-scale industrial production.

Description

The recovery method of thioxamic acid technical field The invention belongs to the technical field of medicines, be specifically related to a kind of recovery method of foetalin. Background technique [0002] Oxymethoxamic acid is mainly used in the synthesis of the third generation, the fourth generation of cephalosporins, and the medicinal effect is good, and the side effect is little to people. It has broad application prospects and high added value. At present, most of the continuous industrial production techniques for preparing oxetiaxamic acid intermediate are all relatively stable, adopt oximation, Alkylization, chlorination, cyclization, hydrolysis process, after the hydrolysis, the acid is adjusted with pH as the end point to control to obtain the crude product of thiophene, its hydrolyzed solution There will be some products in it, and they will generally be treated according to the three wastes. Chinese patent CN 103012312 A discloses a kind of method for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D277/593
CPCC07D277/593
Inventor 王瑞阴华栋李佳刘承鑫张增佳
Owner SHANDONG JINCHENG PHARMACCUTICAL CHEM CO LTD
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