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Method for recovering acetonitrile from waste liquor obtained in producing cefoperazone sodium

A technology of cefoperazone sodium and foperazone sodium is applied in the field of recovery of acetonitrile in pharmaceutical waste liquid, which can solve the problems of high toxicity and high acetonitrile content

Inactive Publication Date: 2005-08-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cefoperazone sodium produces a large amount of waste liquid containing acetonitrile in the middle section of its production. Due to the high content and high toxicity of acetonitrile, the waste liquid cannot directly enter the sewage treatment plant of the pharmaceutical factory
At present, there is no report on the effective treatment of this kind of cefoperazone sodium production waste liquid or the method of reclaiming acetonitrile therefrom at home and abroad

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0004] Specific embodiment one: the steps of this embodiment are: (1) rectification: the cefoperazone sodium production waste liquid is sent into the rectification tower and carries out rectification, and the tower top extraction mass fraction is the crude acetonitrile of 83%; (2) salt Analysis: Add the compound salting-out agent to the crude acetonitrile, mix the compound salting-out agent and the crude acetonitrile fully by stirring, then let it stand for 10-60 minutes, and remove part of the water and impurities in the crude acetonitrile by salting out; (3) Filtration: The thick acetonitrile that contains compound salting-out agent is filtered, and the compound salting-out agent is filtered out; (4) the thick acetonitrile after salting-out carries out secondary rectification, and the mass fraction of extraction is the thick acetonitrile of 84%, and thick acetonitrile passes salt Analysis and filtration, the salted-out crude acetonitrile is returned to the secondary rectifica...

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Abstract

A process for recovering acetonitrile for the sewage generated in preparing cefoperazone sodium includes rectifying to obtain coarse acetonitrile, adding composite salting-out agent, stirring, filter, and rectifying again to obtain high-purity acetonitrile.

Description

Technical field: [0001] The invention relates to a method for recovering acetonitrile in pharmaceutical waste liquid. Background technique: [0002] Cefoperazone sodium (also known as Pioneer must) is a third-generation broad-spectrum semi-synthetic cephalosporin. Some large pharmaceutical factories have started trial production and have now officially realized localization. Cefoperazone sodium produces a large amount of waste liquid containing acetonitrile in the middle section of its production. Due to the high content and high toxicity of acetonitrile, the waste liquid cannot directly enter the sewage treatment plant of the pharmaceutical factory. At present, there is no report on the effective treatment of this cefoperazone sodium production waste liquid or the method of reclaiming acetonitrile therefrom at home and abroad. Invention content: [0003] The purpose of the present invention is to provide a method for reclaiming acetonitrile from cefoperazone sodium prod...

Claims

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Application Information

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IPC IPC(8): C07C253/34C07C255/03
Inventor 刘惠玲
Owner HARBIN INST OF TECH
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