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Method for recycling triethylamine from wastewater containing triethylamine hydrochloride

A technology of triethylamine hydrochloride and triethylamine, applied in chemical instruments and methods, water pollutants, organic chemistry, etc., can solve problems such as difficulty in meeting expected discharge requirements, large consumption, high ammonia-nitrogen in wastewater, and achieve Reduced sewage characteristic factor, simple production operation, and the effect of reducing ammonia-nitrogen

Inactive Publication Date: 2015-12-02
JIANGSU RUIKE MEDICAL SCI & TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0002] In the synthesis of carbapenicillin key intermediate 4AA, triethylamine will be used as an acid agent in the reaction process. Because the amount of triethylamine in the synthesis is relatively large, and after the reaction is complete, triethylamine hydrochloride or Phosphate exists in the water in the form of phosphate, resulting in excessive ammonia-nitrogen in the discharged wastewater, and it is difficult to meet the expected discharge requirements through general biochemical aerobic-anaerobic treatment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] Take 1000ML of reaction wastewater, heat it to 60°C, adjust the pH to 8 with 20% liquid caustic soda, and keep it warm for half an hour. Dry with sodium for 1 hour, filter, distill the filtrate under atmospheric pressure, collect 88-90°C fractions to obtain 152 g of triethylamine, with a purity of more than 99.18% and a water content of less than 0.31%.

Embodiment 2

[0020] Take 1000ML of reaction wastewater, heat it to 60°C, adjust the pH to 9 with 20% liquid caustic soda, and keep it warm for half an hour. Sodium-dried for 1 hour, filtered, and the filtrate was distilled under atmospheric pressure, and the fraction at 88-90°C was collected to obtain 160 g of triethylamine with a purity of more than 99.26% and a water content of less than 0.31%.

Embodiment 3

[0022] Take 1000ML of reaction wastewater, heat it to 60°C, adjust the pH to 10 with 20% liquid caustic soda, and keep it warm for half an hour. Sodium-dried for 1 hour, filtered, and the filtrate was distilled under atmospheric pressure, and the fraction at 88-90°C was collected to obtain 162 g of triethylamine with a purity of more than 99.46% and a water content of less than 0.39%.

[0023] The method for reclaiming triethylamine from waste water containing triethylamine hydrochloride provided by the present invention has high recovery rate and high recovery purity, and can reduce the discharge of refractory pollution factors in waste water, which can be improved by this method Reducing the production cost of 4AA, the key intermediate of carbapenicillin, can also reduce the discharge of refractory pollution factors in wastewater, so as to achieve the purpose of reducing discharge of wastewater characteristic factors, which can reduce costs and improve efficiency, and can be ...

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Abstract

The invention discloses a method for recycling triethylamine from wastewater containing triethylamine hydrochloride. The method comprises the following steps: (1) heating wastewater to 60 DEG C, and adding caustic soda liquid with purity of 20% to regulate the pH value of wastewater to 8-10; (2) preserving the temperature for half an hour to dissociate triethylamine from triethylamine hydrochloride; and (3) after the temperature preservation, standing to layer, so as to remove a water layer, adding anhydrous sodium sulfate into a residual organic layer after the water layer is removed, drying for 1 hour, filtering, distilling filtered filtrate under normal pressure, and collecting distillate. The method for recycling triethylamine from wastewater containing triethylamine hydrochloride has the beneficial effects that the recovery rate and the recycling purity are high, the immission of difficultly treated pollution factors in wastewater can be reduced; by virtue of improvement of the method, the production cost of a carbene penicillin key intermediate 4AA can be lowered; the method has remarkable double benefits on environmental protection and economy, and the purpose of reducing the characterization factors of sewage is achieved.

Description

technical field [0001] The invention relates to a method for recovering triethylamine, in particular to a method for recovering triethylamine from waste water containing triethylamine hydrochloride. Background technique [0002] In the synthesis of carbapenicillin key intermediate 4AA, triethylamine will be used as an acid agent in the reaction process. Because the amount of triethylamine in the synthesis is relatively large, and after the reaction is complete, triethylamine hydrochloride or Phosphate exists in the water in the form of phosphate, resulting in excessive ammonia-nitrogen in the discharged wastewater, and it is difficult to meet the expected discharge requirements through general biochemical aerobic-anaerobic treatment. In order to achieve the reduction of wastewater discharge, control the discharge of pollution factors from the source, and strengthen the recovery of organic amine compounds in wastewater is the only way. [0003] In order to achieve the above ...

Claims

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Application Information

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IPC IPC(8): C07C211/05C07C209/86C02F9/04C02F9/10C02F101/38C02F103/36
Inventor 赵小泉朱家伍张杰
Owner JIANGSU RUIKE MEDICAL SCI & TECH CO LTD
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