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Technology for treatment of fluorine-boron-containing wastewater during Ceftezole acid preparation

A technology of ceftizolic acid and preparation process, applied in the field of wastewater treatment technology, can solve problems such as environmental pollution, and achieve the effects of large value of by-products, simple operation and small investment

Inactive Publication Date: 2013-03-13
江苏德峰药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Boron trifluoride is used as a raw material for the synthesis of ceftezole. After the reaction, it is hydrolyzed to generate boric acid and fluoboric acid, which are mixed with waste water. If it is discharged directly, it will inevitably cause environmental pollution.
At present, no research related to this aspect has been reported in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A process for treating fluorine-boron wastewater in the preparation process of ceftezole acid, respectively removing boric acid and fluoboric acid in the wastewater through two-stage neutralization reactions, the specific steps are:

[0016] 1) The first stage reaction: first add calcium hydroxide to the wastewater for neutralization reaction, the mixing weight ratio of wastewater and calcium hydroxide is 10:0.63, when the pH of the solution reaches 6-7, continue to stir for 1-2 hours , the crystallized precipitate is subjected to solid-liquid separation, the filtrate is sent to the next stage of reaction for use, and the solid precipitate is dried to obtain calcium borate solid;

[0017] 2) Second-stage reaction: pump the above-mentioned filtrate into the secondary reaction tank, start the mixer, put in potassium chloride with a weight ratio of 0.42 parts by weight based on the weight of the above-mentioned wastewater, and react for 1 hour after feeding, and the precipi...

Embodiment 2

[0019] Same as Example 1, the difference is that the mixing weight ratio of the waste water and calcium hydroxide is 10:6.5, the weight ratio of the waste water and potassium chloride is 10:0.45, and the filtrate is detected by the environmental protection testing center station. The fluorine content in the separated water reaches 3.05 mg / l, the boron content reaches 1.89 mg / l, and the pH is 6.8, meeting the national industrial wastewater discharge standards.

Embodiment 3

[0021] With embodiment 1, the difference is that the mixing weight ratio of the waste water and calcium hydroxide is 10:6.4, the weight ratio of the waste water and potassium chloride is 10:0.44, and the filtrate is detected by the environmental protection testing center station, The fluorine content in the separated water reaches 2.89 mg / l, the boron content reaches 1.7 mg / l, and the pH is 6.7, meeting the national industrial wastewater discharge standards.

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PUM

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Abstract

The invention discloses a technology for treatment of fluorine-boron-containing wastewater during Ceftezole acid preparation. According to the technology, boric acid and fluoboric acid are remove from wastewater respectively by a two-stage neutralization reaction, so that the fluorine content of the industrial wastewater is decreased to 5mg / l, the boron content is reduced to 5mg / l, and the pH of the wastewater is 6-7, thus meeting the national wastewater discharge standards. The technology has the advantages of simple operation, small investment, and large by-product value. Calcium borate can be used for alkali-free glass fiber production, and potassium fluoborate can be used as a catalyst for polypropylene synthesis.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a process for treating fluorine-boron wastewater in the preparation process of ceftezole acid. Background technique [0002] Boron trifluoride is a Lewis acid commonly used in organic synthesis, and is widely used in the production of cephalosporins and other organic synthesis reactions. Boron trifluoride is used as a raw material for the synthesis of ceftezole acid. After the reaction, boric acid and fluoboric acid are hydrolyzed to form boric acid and fluoboric acid, which are mixed with waste water. If they are directly discharged, environmental pollution will inevitably occur. Therefore, the removal of boric acid and fluoboric acid in cephalosporin wastewater has always been the focus of research in this industry. At present, no research related to this aspect has been reported in the literature. Contents of the invention [0003] The object of the present invention is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/36
Inventor 王德峰石飞王炳才张耀斌朱小飞俞健钧
Owner 江苏德峰药业有限公司
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