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Hydroxylamine wastewater processing method

A treatment method, hydroxylamine technology, applied in water/sewage treatment, special compound water treatment, neutralized water/sewage treatment, etc., can solve the problems of high cost and large dosage, and achieve less solid waste and low cost Effect

Active Publication Date: 2019-01-15
ZHEJIANG GUOBANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above-mentioned defects existing in the treatment of existing hydroxylamine wastewater (including wastewater containing hydroxylamine and wastewater containing hydroxylamine salts), the application provides a method for effectively removing hydroxylamine components in wastewater and overcoming the dosage of other materials in the prior art. Large, costly defects

Method used

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: the treatment that contains hydroxylamine wastewater

[0020] Take 100g of wastewater containing hydroxylamine, the concentration of hydroxylamine is 5%, adjust the pH value to 7 with hydrochloric acid, add 0.2g of ferric chloride hexahydrate (containing 0.04g of ferric ion), stir for 0.5 hours, and slowly add 4g of it dropwise with a dropping funnel Hydrogen peroxide (30% concentration), during the dropping process, pay attention to controlling the rate of adding hydrogen peroxide, observe the temperature change of the feed liquid and the foam generated during the reaction, and prevent the temperature from being too high and the reaction speed from being too fast to cause the material to rush. After the dropwise addition, the stirring was continued until the exothermic reaction basically stopped, and the concentration of hydroxylamine was 0.002% for detection by sampling.

Embodiment 2

[0021] Embodiment 2: the treatment that contains hydroxylamine wastewater

[0022] Take 100g of wastewater containing hydroxylamine, the concentration of hydroxylamine is 10%, adjust the pH value to 6 with sulfuric acid, add 1.0g of ferric chloride hexahydrate (containing 0.21g of ferric ion), stir for 0.5 hours, and slowly add 8g of it dropwise with a dropping funnel Hydrogen peroxide (30% concentration), during the dropping process, pay attention to controlling the rate of adding hydrogen peroxide, observe the temperature change of the feed liquid and the foam generated during the reaction, and prevent the temperature from being too high and the reaction speed from being too fast to cause the material to rush. After the dropwise addition, the stirring was continued until the exothermic reaction basically stopped, and the concentration of hydroxylamine was 0.003% for detection by sampling.

Embodiment 3

[0023] Embodiment 3: the treatment that contains hydroxylamine wastewater

[0024] Take 100g of wastewater containing hydroxylamine, the concentration of hydroxylamine is 8%, adjust the pH value to 6.5 with hydrochloric acid, add 1.1g of ferric chloride hexahydrate (containing 0.24g of ferric ion), stir for 0.5 hours, and slowly add 5g of it dropwise with a dropping funnel Hydrogen peroxide (30% concentration), during the dropping process, pay attention to controlling the rate of adding hydrogen peroxide, observe the temperature change of the feed liquid and the foam generated during the reaction, and prevent the temperature from being too high and the reaction speed from being too fast to cause the material to rush. After the dropwise addition, the stirring was continued until the exothermic reaction basically stopped, and the concentration of hydroxylamine was 0.004% for detection by sampling.

[0025] Embodiment 1-3 is three schemes of our scheme as representative, in test ...

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PUM

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Abstract

The invention relates to a hydroxylamine wastewater processing method, and belongs to the technical field of water, wastewater, or sewage processing. According to the processing method, the pH of hydroxylamine wastewater to be processed is adjusted to 2-8; trivalent iron ions with a catalytic amount are added, the wastewater is stirred, the catalytic amount is that trivalent iron ions account for0.5 to 5 wt.% of hydroxylamine; then hydrogen peroxide is added, the wastewater is stirred until there is no obvious heat release, and the reactions are finished. The method is used to process hydroxylamine wastewater and has the advantages of low residual hydroxylamine, low cost, little solid waste, and simple post treatment.

Description

technical field [0001] The application relates to a method for treating hydroxylamine wastewater, which belongs to the technical field of water, wastewater or sewage treatment. Background technique [0002] Hydroxylamine is generally used as a reducing agent in organic synthesis, and its reaction with carbonyl compounds to generate oximes is widely used in chemical synthesis. For example, caprolactam is formed by reacting cyclohexanone with hydroxylamine to form cyclohexanone oxime, and then undergoes Beckmann rearrangement reaction to obtain caprolactam. Hydroxylamine is also an important raw material for the preparation of pharmaceutical intermediates, such as the macrolide product produced by our company. The first step reaction of this product is the reaction of erythromycin A and hydroxylamine to form erythromycin oxime. [0003] Hydroxylamine is a low-cost chemical raw material. In order to ensure the full utilization of other compounds during the oximation reaction w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/16
CPCC02F1/66C02F1/722C02F1/725C02F2101/16C02F2305/02
Inventor 金勇李广青张承群邵昌哲尤启冬余辉龙侯仲轲姚礼高孟仲建
Owner ZHEJIANG GUOBANG PHARMA
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