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Processing method of terramycin crystallization mother liquor wastewater

A crystallization mother liquor and treatment method technology, applied in the chemical field, can solve problems such as slow process and poor effect, and achieve the effect of reducing difficulty, reducing product cost, and simple treatment process

Active Publication Date: 2015-06-24
上海赛奥分离技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of processing method of oxytetracycline crystallization mother liquor wastewater, the processing method of described this oxytetracycline crystallization mother liquor wastewater will solve the slow process of processing oxytetracycline crystallization mother liquor wastewater in the prior art, the effect bad technical problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 120 kg of oxytetracycline crystal mother liquor, oxytetracycline content 920ppm, COD18200ppm, add 1450 ml of hydrochloric acid to adjust the pH to 2.8, add 0.1% concentration of polyacrylamide 1800 ml, enter the organic membrane separation system, the molecular weight cut-off of the organic membrane is 2500 Daltons , to get 108 kg of permeate, containing 12ppm of oxytetracycline in the permeate, and 1.3% loss of oxytetracycline; the permeate was treated with anaerobic and aerobic treatment, COD was reduced to 95ppm; The oxytetracycline product is precipitated by electroporation, and the oxytetracycline product is obtained by filtration and drying;

Embodiment 2

[0020] Take 200 kg of oxytetracycline crystallization mother liquor, oxytetracycline content 720ppm, COD14200ppm, add 2450 milliliters of hydrochloric acid to adjust the pH to 2.3, enter the organic membrane separation system, the molecular weight cut-off of the organic membrane is 1000 Daltons, and obtain 175 kg of the permeated liquid. The solution contains 8ppm of oxytetracycline product, and the loss of oxytetracycline product is 0.9%; the permeate solution is anaerobic and aerobic treated, and the COD is reduced to 80ppm; the membrane retention solution is 25 kg, and alkali is added to adjust the isoelectric point to precipitate oxytetracycline product. Filter and dry to obtain oxytetracycline product.

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PUM

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Abstract

The invention provides a processing method of terramycin crystallization mother liquor wastewater, comprising the steps of pretreating terramycin crystallization mother liquor, namely, adding acid solution into the terramycin crystallization mother liquor to adjust the pH of the terramycin crystallization mother liquor to 2-3, adding polyacrylamide at the same time so that the concentration of the polyacrylamide in the terramycin crystallization mother liquor is 10-50ppm; separating by adopting an organic film, wherein the molecular cut off of the organic film is between 800Dalton and 2500Dalton; performing biochemical treatment on a film penetrating solution, namely, carrying out anaerobic-aerobic treatment on the penetrating solution, wherein the COD of the sewage system after aerobic treatment is less than 100 ppm; and separating a film rejection liquid to obtain crude terramycin, namely, adjusting the pH value of the rejection liquid to separate out the product to obtain the crude terramycin. The processing technology is simple and easy to industrialize; through the use of the processing technology, the difficulty of biochemical treatment of terramycin crystallization mother liquor is reduced, and the terramycin products can be recovered at the same time.

Description

Technical field: [0001] The invention relates to the field of chemistry, in particular to a sewage treatment process in the production process of antibiotics, in particular to a treatment method for oxytetracycline crystallization mother liquor wastewater. Background technique: [0002] Oxytetracycline is a off-white to yellow crystalline powder, odorless, bitter in taste, melting point is 180°C, darkens in sunlight, easily destroyed and ineffective in alkaline solution. Oxytetracycline hydrochloride is a yellow crystal with a bitter taste and a melting point of 190-194°C. It is hygroscopic, but moisture and light do not affect its potency. It will not deteriorate or become invalid when stored at room temperature for a long time. Hydrochloride is easily soluble in water, soluble in methanol, slightly soluble in absolute ethanol, insoluble in chloroform and ether, unstable under acidic conditions. Added to the feed and stored at room temperature for four months, the potenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C07C237/26C07C231/24
CPCY02W10/37
Inventor 刘旭红胡兵陶锐于爱国赖新生赵化
Owner 上海赛奥分离技术工程有限公司