Technology for treating phenol-contained wastewater in synthetic process of L-(+)-D-p-hydroxyphenylglycine

A technology of p-hydroxyphenylglycine and a synthesis process is applied in the field of treatment of phenol-containing wastewater, which can solve the problems of waste of resources, inability to recover phenol, etc., and achieve the effect of reducing the pressure of environmental protection

Inactive Publication Date: 2010-06-30
HENAN NEWLAND PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are different methods for the treatment of phenol-containing wastewater, which can be removed by chemical oxidation and biodegradation. The disadvantage is that phenol cannot be recycled, resulting in waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0010] Example 1: Pack a column with 1000KgXH-303 macroporous adsorption resin, Φ600*4000, wash with acetone until the effluent is colorless, and then rinse with deionized water until the effluent is free of acetone smell, and the treated content is 3000L per hour Phenol wastewater (PH=2, 7500PPM) flows into the adsorption column, and the leakage of 30,000Kg wastewater has a phenol concentration of 15PPM. It flows through another new macroporous resin adsorption column at a speed of 3000L per hour. The leakage liquid phenol concentration is 4PPM. The speed flows through an activated carbon column of the same specification, the leakage liquid phenol concentration is 0.10PPM, and the phenol removal rate is 100%.

example 2

[0011] Example 2: Others are the same as in Example 1. The wastewater flow rate is adjusted to 5000L / hour, the column I leakage concentration is 25PPM, the column II leakage concentration is 5PPM, the activated carbon column leakage concentration is 0.10PPM, and the phenol removal rate is 100%.

example 3

[0012] Example 3: Others are the same as in Example 1. Adjust the wastewater flow rate to 7000L / hour, column I leakage concentration is 150PPM, column II leakage concentration is 12PPM, and activated carbon column leakage concentration is 0.3PPM.

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PUM

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Abstract

The invention relates to a technology for treating phenol-contained wastewater in the synthetic process of L-(+)-D-p-hydroxyphenylglycine, which belongs to the technical field of the treatment of organic chemical wastewater. In the method, after the distillation pretreatment is carried out on synthesized wastewater, the macroporous resin adsorption treatment is carried out on the collected phenol-contained wastewater, wherein the pretreatment comprises the step of carrying out acidized pretreatment on the synthesized wastewater. In the method, because a phenol-contained substance in the wastewater is removed in advance, the recycling and processing difficulty of the subsequent inorganic salt can be greatly improved. The recycled sodium phenolate can be charged back to the synthesizing section of p-hydroxyphenylglycine. The method has stable and reliable treatment effect, low treatment cost and simple, convenient and easily-applied operation and is easy to realize industrialized application.

Description

Technical field [0001] The present invention relates to the treatment technology of phenol-containing wastewater. In particular, it is used in a large amount of phenol-containing wastewater produced during the synthesis of p-hydroxyphenylglycine. Background technique [0002] In the racemic p-hydroxyphenylglycine synthesis section, a large amount of phenol-containing wastewater is produced. The phenol content is 5000-10000PPM. Every 1 ton of p-hydroxyphenylglycine produced produces 5 tons of wastewater. Phenol is a protoplasmic poison and a highly toxic substance, which is harmful to the environment. , Waste water containing phenol cannot be directly discharged. The state requires that the phenol content in industrial waste water be below 0.5 PPM. The phenol content in synthetic waste water is high, which is worthy of recycling. [0003] There are different methods for the treatment of phenol-containing wastewater, which can be removed by chemical oxidation and biodegradation. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F9/10C02F1/28C02F1/04C02F1/66F23G7/00C02F103/36C02F101/34
Inventor 谢建中
Owner HENAN NEWLAND PHARMA
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