Method for recovering triethylamine from industrial waste water

A technology for industrial wastewater and triethylamine, which is applied in chemical instruments and methods, natural water treatment, water/sewage treatment, etc., can solve the problems of triethylamine being unable to be obviously stratified, high steam energy consumption, and large amount of wastewater, etc. To achieve the effect of reducing energy consumption, reducing sewage pressure, and reducing recovery costs

Active Publication Date: 2021-08-06
SHANXI WEIQIDA PHARMA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As mentioned above, the concentration of triethylamine in the waste water produced in the production of ceftriaxone sodium is relatively low, generally 0.5wt%~1.0wt%, and the amount of waste water is large (100m 3 / day), because triethylamine is slightly soluble in water, in the case of low content, the free triethylamine and waste water cannot be clearly separated after adding alkali in the waste water, and if rough steaming is carried out, the energy consumption of steam will be reduced very high and uneconomical
[0007] Therefore, said method is not applicable to the waste water that ceftriaxone sodium produces, i.e. this waste water with lower concentration of triethylamine, how to reclaim triethylamine for such waste water, need to work out an effective method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Get the waste water with low content of triethylamine produced in the production of ceftriaxone sodium, wherein triethylamine content is 0.8wt%, pH value is 5.7, COD is 960mg / L, and ammonia nitrogen is 145mg / L. Regulate the pH value of this waste water to 10 with 32wt% sodium hydroxide solution, pass through macroporous adsorption resin column bed (resin model DM700, wet packing, loading capacity 1.0L, aspect ratio is 8.0 with the flow rate of 2.0L / h ), when the detection column outlet effluent detected triethylamine, it stopped entering the waste water (waste water intake: 10L), and collected the adsorption residual liquid flowing through the resin column bed simultaneously, and in this adsorption residual liquid, COD was 80mg / L, The ammonia nitrogen is 15mg / L, which is discharged into the general sewage treatment system of the factory for unified biochemical treatment; then, 1.5L of purified water is used to pass through the macroporous adsorption resin column bed (flo...

Embodiment 2

[0036] Get the waste water with low content of triethylamine produced in the production of ceftriaxone sodium, wherein the content of triethylamine is 0.5wt%, the pH value is 5.3, the COD is 890mg / L, and the ammonia nitrogen is 131mg / L. Regulate the pH value of this waste water to 10 with 32wt% sodium hydroxide solution, pass through macroporous adsorption resin column bed (resin model DM700, wet packing, loading capacity 1.0L, aspect ratio is 8.0 with the flow rate of 2.5L / h ), when the detection column outlet effluent detected triethylamine, it stopped entering the waste water (waste water intake: 16.5L), and collected the adsorption residual liquid flowing through the resin column bed simultaneously, and the COD in the adsorption residual liquid was 68mg / L , ammonia nitrogen is 18mg / L, and it is discharged into the general sewage treatment system of the factory for unified biochemical treatment; then, 1.5L of purified water is used to pass through the macroporous adsorption ...

Embodiment 3

[0040] Get the waste water with low content of triethylamine produced in the production of ceftriaxone sodium, wherein the content of triethylamine is 1.0wt%, the pH value is 4.6, the COD is 915mg / L, and the ammonia nitrogen is 113mg / L. Regulate the pH value of this waste water to 11 with 32wt% sodium hydroxide solution, pass through macroporous adsorption resin column bed (resin model LX033, wet packing, loading capacity 1.0L, aspect ratio is 8.0 with the flow velocity of 1.5L / h ), when the detection column outlet effluent detected triethylamine, it stopped entering waste water (waste water intake: 8L), and collected the adsorption residual liquid flowing through the resin column bed simultaneously, and in this adsorption residual liquid, COD was 62mg / L, The ammonia nitrogen is 14mg / L, which is discharged into the general sewage treatment system of the factory for unified biochemical treatment; then, 1.5L of purified water is used to pass through the macroporous adsorption res...

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PUM

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Abstract

The invention relates to a method for recovering triethylamine from industrial waste water. The method for reclaiming triethylamine of the present invention comprises the following steps: (1) use alkali to adjust the pH value of the waste water with low triethylamine content to alkaline, then the waste water is adsorbed by non-polar macroporous adsorption resin, three Ethylamine is adsorbed on the resin, and then an acid solution is used for desorption to obtain a triethylamine desorption solution with increased content; (2) an alkali is used to adjust the pH value of the triethylamine desorption solution obtained above to alkaline, and then distilled, Collecting triethylamine; and (3) rectifying the collected triethylamine, collecting fractions at 70°C-73°C to obtain purified triethylamine. The process design of the method is reasonable, energy consumption is reduced, and the discharged wastewater has low COD and ammonia nitrogen indicators, and can be discharged into the general sewage treatment system of the factory for unified general biochemical treatment.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a method for reclaiming triethylamine from industrial waste water, especially a method for reclaiming triethylamine from waste water with low content of triethylamine, more specifically, in the production of ceftriaxone sodium A method for recovering triethylamine from waste water with low content of triethylamine produced. Background technique [0002] Ceftriaxone is a third-generation broad-spectrum, high-efficiency, long-acting, and low-toxic cephalosporin, which is widely used in clinical practice. The main method of producing ceftriaxone sodium at present is: take 7-ACA as the main raw material and triazine ring condensation to generate 7-ACT intermediate, 7-ACT and AE active ester undergo three-step process under methanol-dichloromethane binary solvent system Ethylamine catalyzes the reaction to generate ceftriaxone sodium. After the reaction is completed, water is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/84C07C209/86C07C211/05C02F1/28C02F103/36
CPCC02F1/285C02F2103/343C02F2103/36C02F2303/16C07C209/84C07C209/86C07C211/05
Inventor 白延峰李伟张俊锋李树有张华秀刘君臣
Owner SHANXI WEIQIDA PHARMA IND
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