Method and system for recovering waste water generated in carbocisteine production

A technology for carbocisteine ​​and waste water production, applied in chemical instruments and methods, natural water treatment, multi-stage water/sewage treatment, etc.

Inactive Publication Date: 2012-12-26
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this kind of wastewater, there are currently physical and chemical methods, biological methods and other treatment methods. Physical and chemical methods consume a lot of chemicals and produce secondary pollution; excessive ammonia nitrogen and chloride ions inhibit microorganisms and high COD, which makes biological The method is difficult to deal with and the effect is poor

Method used

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  • Method and system for recovering waste water generated in carbocisteine production
  • Method and system for recovering waste water generated in carbocisteine production
  • Method and system for recovering waste water generated in carbocisteine production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A three-compartment 6-unit BP-A-C / BMED bipolar membrane electrodialysis system composed of bipolar membranes, anion exchange membranes, and cation exchange membranes arranged alternately in sequence, see figure 1 , where the effective area of ​​the membrane is 842cm 2 . The contents of ammonium chloride and carbocisteine ​​in the carbocisteine ​​production wastewater tested in this example were 2 mol / L and 1 g / L respectively, and the conductivity was 171 mS / cm. Pump carbocisteine ​​production wastewater into the salt chamber. The alkali chamber uses the ammonia solution with a concentration of 0.05mol / L as the initial solution. The acid chamber uses the hydrochloric acid solution with a concentration of 0.05mol / L as the initial solution. L of sodium chloride solution. Under the conditions of membrane surface flow rate of 3cm / s and external constant voltage of 16V, the intermittent operation mode is adopted, and the pH of the salt chamber is adjusted between 2 and 3 w...

Embodiment 2

[0071] The BP-C / BMED bipolar membrane electrodialysis system with bipolar membranes and cation exchange membranes alternately arranged to form two compartments and five units, see figure 2 , where the membrane effective area is 735cm 2 , The thickness of the partition is 0.132cm. The contents of ammonium chloride and carbocisteine ​​in the carbocisteine ​​production wastewater tested in this example were 0.5 mol / L and 1 g / L respectively. Carbocisteine ​​production wastewater is pumped into the acid / salt chamber, the alkali chamber uses ammonia solution with a concentration of 0.05 mol / L as the initial solution, and the electrode chamber uses 0.5 mol / L sodium chloride solution. The flow velocity on the membrane surface is 3cm / s and the current density is 500A / m 2 Under certain conditions, the intermittent operation mode is adopted, and the pH value and conductivity in the alkali chamber and the acid / salt chamber are monitored online. The electrodialysis separation was termi...

Embodiment 3

[0074] The bipolar membrane electrodialysis system adopted in this embodiment is the same as that in Embodiment 2. The content of ammonium chloride and carbocisteine ​​in the carbocisteine ​​production wastewater tested in this example was 2mol / L and 1g / L respectively. Carbocisteine ​​production wastewater is pumped into the acid / salt chamber, the alkali chamber uses ammonia solution with a concentration of 0.05 mol / L as the initial solution, and the electrode chamber uses 0.5 mol / L sodium chloride solution. The flow velocity on the membrane surface is 3cm / s and the current density is 500A / m 2 Under certain conditions, the intermittent operation mode is adopted, and the pH value and conductivity in the alkali chamber and the acid / salt chamber are monitored online. The electrodialysis separation was terminated when the conversion rate of salt in the acid / salt chamber was 40%.

[0075]The concentration of ammonia water in the alkali chamber is 0.62mol / L, the concentration of h...

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Abstract

The invention discloses a method and system for recovering waste water generated in carbocisteine production. The system comprises a bipolar membrane electro-dialysis desalination system and a recovering system; the recovering system comprises an acid concentrating and recovering system, a base concentrating and recovering system and a carbocisteine concentrating and recovering system. With the adoption of the system, salts in the waste water generated in carbocisteine production can be converted into corresponding acid and base so as to be removed; the obtained acid and base can be directly used in the carbocisteine production process or be used in the carbocisteine production process after an advanced treatment; the carbocisteine in the waste water is further recovered by using a carbocisteine concentrating crystallizing system. By treating the waste water generated in the carbocisteine production by using the method, organism pollution, salt pollution and ammonia nitrogen pollution are avoided; in addition, the recovered acid and base can be reused in the carbocisteine production process to realize zero emission; by using the recovered carbocisteine, the carbocisteine yield is increased and the cost of the method provided by the invention can be further reduced.

Description

[0001] technical field [0002] The invention belongs to the field of pharmacy and chemical industry, and in particular relates to a method and system for recycling carbocisteine ​​production wastewater. Background technique [0003] Carbocisteine, also known as Carbocisteine, has the molecular formula C 5 h 9 NO 4 S, white crystalline powder. Carbocisteine ​​is a sticky sputum regulator, which mainly affects the secretion of bronchial glands at the cellular level, increasing the secretion of low-viscosity salivary mucin, while reducing the production of high-viscosity fucoidal mucin, thus making the sputum more viscous. Reduced, easy to dissolve. Carbocisteine ​​is used for chronic bronchitis, bronchial asthma and other diseases caused by thick sputum, difficulty in expectoration, and phlegm obstruction of the trachea; it can also be used to prevent and treat difficulty in expectoration and pneumonia complications after surgery; it can also be used for non-suppurativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F103/36
Inventor 王红萍李应辉李增徐昆鹏马雪庆钟帆刘莎
Owner WUHAN UNIV
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