7-ADCA mother liquor recovery treatment method

A 7-ADCA, mother liquor recovery technology, applied in filtration treatment, water/sewage treatment, natural water treatment, etc., can solve problems such as difficulty in meeting environmental protection requirements, inability to simultaneously recover high-quality ammonium sulfate and 7-ADCA, etc. Easy to operate, obvious effect, simple process effect

Pending Publication Date: 2020-08-04
NORTH CHINA PHARMA COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of 7-ADCA mother liquor recovery treatment method, to solve the problem that the existing 7-ADCA mother liquor recovery method cannot reclaim high-quality ammonium sulfate and 7-ADCA simultaneously, and is difficult to meet the environmental protection demand

Method used

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  • 7-ADCA mother liquor recovery treatment method

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Effect test

Embodiment 1

[0023] Such as figure 1 Shown is a schematic flow sheet of a 7-ADCA mother liquor recovery treatment method provided by the invention, comprising the following steps:

[0024] The raw materials are separated by crystallization and centrifugation to obtain 7-ADCA finished product and 7-ADCA mother liquor. The main substances contained in the mother liquor are inorganic salts and other organic impurities, and part of 7-ADCA (concentration 0.8 mg / mL), of which the COD concentration is 3800mg / L, SO 4 2- The concentration is 55000mg / L, NH 4+ The concentration is 15000mg / L, (NH 4 ) 2 SO 4 Concentration is 7%, pH is 4.0, wastewater volume is 140m 3 .

[0025] After the 7-ADCA mother liquor is collected by a temporary storage tank, it is first filtered through a filter, and then the 4m 3 / h flow rate into the electrodialysis unit for treatment. Utilizing the selective permeability of the ion exchange membrane of the electrodialysis device, the ammonium ions and sulfate ions w...

Embodiment 2

[0029] The raw materials are separated by crystallization and centrifugation to obtain 7-ADCA finished product and 7-ADCA mother liquor. The main substances contained in the mother liquor are inorganic salts and other organic impurities, and some 7-ADCA (concentration 1.0 mg / mL), of which the COD concentration is 4000mg / L, SO 4 2- The concentration is 58000mg / L, NH 4+ The concentration is 16000mg / L, (NH 4 ) 2 SO 4 The concentration is 7.3%, the pH is 4.0, and the wastewater volume is 120m 3 .

[0030] After the 7-ADCA mother liquor is collected by a temporary storage tank, it is first filtered through a filter, and then the 4m 3 / h flow rate into the electrodialysis unit for treatment. Utilizing the selective permeability of the ion-exchange membrane of the electrodialysis device, the ammonium ion and sulfate ion with strong ionization degree in the mother liquor pass through the membrane to obtain ammonium sulfate concentrate (electrodialysis concentrated water 7.6), a...

Embodiment 3

[0034] The raw materials are separated by crystallization and centrifugation to obtain 7-ADCA finished product and 7-ADCA mother liquor. The main substances contained in the mother liquor are inorganic salts and other organic impurities, and some 7-ADCA (concentration 1.2 mg / mL), of which the COD concentration is 4200mg / L, SO 4 2- The concentration is 60000mg / L, NH 4+ The concentration is 17000mg / L, (NH 4 ) 2 SO 4 Concentration is 7.5%, pH is 4.0, wastewater volume is 100m 3 .

[0035] After the 7-ADCA mother liquor is collected by a temporary storage tank, it is first filtered through a filter, and then the 4m 3 / h flow rate into the electrodialysis unit for treatment. Utilizing the selective permeability of the ion exchange membrane of the electrodialysis device, the ammonium ions and sulfate ions with strong ionization degree in the mother liquor pass through the membrane to obtain ammonium sulfate concentrate (electrodialysis concentrated water), and the ammonium sulf...

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Abstract

The invention provides a recovery treatment method of 7-ADCA mother liquor. The method comprises the following steps: (a) filtering the mother liquor, feeding the mother liquor into an electrodialysistreatment device, enabling ammonium ions and sulfate ions in the mother liquor to penetrate through an ion exchange membrane of the electrodialysis treatment device to obtain an ammonium sulfate concentrated solution, retaining 7-ADCA and organic impurities in the mother liquor in the mother liquor, and discharging the 7-ADCA and the organic impurities as electrodialysis fresh water; (b) concentrating the electrodialysis fresh water through a nanofiltration membrane, and crystallizing to recover 7-ADCA; (c) feeding the ammonium sulfate concentrated solution into an MVR evaporation system, andtreating to obtain ammonium sulfate crystal mush; and (d) cooling, crystallizing and centrifuging the ammonium sulfate crystal mush to obtain an ammonium sulfate finished product. According to the method, 7-ADCA and ammonium sulfate with economic value in the mother liquor can be effectively recovered, and the purity of the ammonium sulfate finished product can reach 98% or above; the method is simple in process and easy to operate, the effect of reducing ammonia nitrogen and salinity in the wastewater is obvious, and the current-stage environment-friendly emission requirement is met.

Description

technical field [0001] The invention relates to the technical field of recycling and treating chemical wastewater, in particular to a method for recycling and treating 7-ADCA mother liquor. Background technique [0002] With the country's emphasis on environmental protection and people's yearning for a better environment, the requirements and standards for wastewater treatment have become more stringent, and the treatment of high-salt and ammonia nitrogen in wastewater has become a major problem. Existing high-salt wastewater treatment processes mainly include electrolysis, electrodialysis, biochemical methods, salt-adaptive biological methods, membrane separation methods, and evaporation and concentration technologies. [0003] 7-ADCA (Chinese name: 7-aminodesacetoxycephalosporanic acid) is one of the mother nuclei of lactam antibiotics, and it is a white or off-white crystalline powder. It is mainly used as an intermediate in the semi-synthesis of important cephalosporin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/24C02F103/34C02F101/10C02F101/16C02F101/30
CPCC02F9/00C01C1/24C02F2103/34C02F1/4693C02F1/442C02F2101/101C02F2101/16C02F2101/30C02F1/38C02F1/001C01P2006/80C01P2006/82
Inventor 杨洪先王捷黎飞赵秀梅于凯王琦靳超刘毅刚胡刚宋斌李爱军孔祥坦崔正月付成名王云鹏刘强崔克娇崔丽珍王欣杨婷
Owner NORTH CHINA PHARMA COMPANY
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