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Process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment

A 7-ADCA and 6-APA technology, applied in the chemical industry, can solve the problems of high salinity, waste of resources, and poor biodegradability of wastewater, and achieve the effects of reducing COD, saving resources, and improving biodegradability

Active Publication Date: 2014-02-26
INNER MONGOLIA CHANGSHENG PHARMA
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In the process of recovering phenylacetic acid from 6-APA and 7-ADCA wastewater, a large amount of acid and alkali will be used. The two will form salts and exist in the wastewater system. If they are not recycled, the salinity of the wastewater will be higher. Poor biodegradability and waste of resources

Method used

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  • Process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment
  • Process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment
  • Process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 carries out phenylacetic acid recovery to 6-APA or 7-ADCA production waste water

[0024] Take 1L of 6-APA or 7-ADCA production wastewater, add 15% sulfuric acid to make the pH of the solution 2.0, then add 250mL of toluene, stir for 15min, let stand for stratification, and separate the water phase for further processing;

[0025] Add 10% sodium hydroxide solution to the organic phase to make the pH of the solution 10.0, stir for 10 min, let stand to separate the layers, and separate the organic phase, which can be reused after distillation. Add 10% sodium hydroxide solution to the aqueous phase obtained in this step to make the pH 12.0, then add 2mL30%H 2 o 2 After stirring for 10 min, the aqueous phase was heated to 60° C., then 1 g of activated carbon was added, stirred for 30 min, and filtered. Cool the filtrate to room temperature and cool down with an ice-water bath, add 15% sulfuric acid to the filtrate to make the pH of the solution 2.0, grow crys...

Embodiment 2

[0026] Embodiment 2 processes the 6-APA or 7-ADCA production waste water after reclaiming phenylacetic acid

[0027] (1) Adjust the pH value: take 1L of the aqueous phase produced in Example 1, its COD is 56440mg / L, and adjust its pH to 0.5 with 15% sulfuric acid;

[0028] (2) Extraction: add 400mL trialkylphosphine oxide (C 8 -C 10 ) and octanol extractant, trialkylphosphine oxide (C 8 -C 10 ) accounted for 33% by volume in the extractant, stirred for 20min, allowed to stand for stratification, separated the water phase, and set aside, its COD was measured to be 3048mg / L;

[0029] (3) Stripping: Add 80mL of 30% sodium hydroxide solution to the organic phase obtained in step (2), stir for 20 minutes, let stand to separate, and recover the extractant. The COD removal rate of the aqueous phase in this process is 92.4%;

[0030] (4) Recovery of sodium sulfate: Take 1L of the aqueous phase obtained in step (2), and concentrate it with a rotary evaporator. The temperature of th...

Embodiment 3

[0031] Embodiment 3 processes the 6-APA or 7-ADCA production wastewater after reclaiming phenylacetic acid

[0032] (1) Adjust the pH value: take 1L of the aqueous phase produced in Example 1, its COD is 58740mg / L, and adjust its pH to 2.0 with 15% sulfuric acid;

[0033](2) Extraction: Add 200mL of tributyl phosphate and MIBK to the aqueous phase obtained in step (1) as an extractant, the volume ratio of tributyl phosphate in the extractant is 67%, stir for 20min, and let stand Layering, separate the water phase, set aside, measure its COD as 3220mg / L;

[0034] (3) Stripping: Add 66 mL of 30% sodium hydroxide solution to the organic phase obtained in step (2), stir for 20 minutes, let stand to separate, and recover the extractant. The COD removal rate of the aqueous phase in this process is 94.5%;

[0035] (4) Recovery of sodium sulfate: Take 1L of the aqueous phase obtained in step (2), and concentrate it with a rotary evaporator. The temperature of the water bath is 60°C, ...

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Abstract

The invention relates to a process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment, and belongs to the field of chemical technology. The process for 6-APA or 7-ADCA production waste water recycling resource and biochemistry pretreatment comprises an extraction step, that is a extractant compsed of a complexing agent and a cosolvent are added into the water phase for extraction. According to the invention, after phenylacetic acid is recycled, the aqueous COD is reduced from 50000-60000 mg / L to 2500-3000 mg / L, thereby the COD of the waste water is substantially reduced, and the biodegradability is improved, and the requirement of the environmental protection biochemical treatment process is satisfied; after the environmental protection biochemical treatment, the water can reach the discharge standard, simultaneously sodium sulfate in water phase obtained by complexation extraction is recycled, and the recycled sodium sulfate can be used for fermentation production once again, thereby reducing production cost and saving resource.

Description

technical field [0001] The invention relates to a waste water treatment technology, more specifically a process for resource recovery and biochemical pretreatment of 6-APA or 7-ADCA production waste water, which belongs to the technical field of chemical industry. Background technique [0002] β-lactam antibiotics are the most commonly used antibacterial drugs clinically and have made great contributions to human health. Penicillins and cephalosporins are important members of the β-lactam antibiotics. 6-APA and 7-ADCA are the mother nuclei for the production of penicillins and cephalosporins antibiotics respectively, and they occupy an important position in the production of penicillins and cephalosporins antibiotics. With the rapid development of penicillins and cephalosporins, the demand for 6-APA and 7-ADCA will inevitably increase. In the process of producing 6-APA and 7-ADCA, a large amount of wastewater containing phenylacetic acid will be produced. [0003] In addi...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D5/00C02F1/66C02F1/26
Inventor 陈学军陈顺记乔文庆李静郭军臣王继明党建忠张彦君
Owner INNER MONGOLIA CHANGSHENG PHARMA
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