A kind of complex nickel remover and its preparation method and application

A remover and complexing technology, applied in chemical instruments and methods, metallurgical wastewater treatment, water/sludge/sewage treatment, etc. volume, easy to precipitate, and enhance the effect of breaking the network

Active Publication Date: 2022-05-10
深圳市点石源水处理技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is very difficult to meet this discharge standard, and the treatment efficiency of the existing technology is relatively low, and the ferrous sulfate commonly used in the treatment of nickel-containing wastewater in the prior art, increasing its dosage will lead to an increase in the amount of mud

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of embodiment of complexed nickel remover of the present invention, the preparation method of complexed nickel remover described in the present embodiment is as follows:

[0032] Take 40mL of water and 40g of cyanuric acid in a three-necked flask, add 15mL of ethylenediamine, keep the reaction temperature at 28°C, gradually add 37mL of carbon disulfide, raise the temperature to 83°C, add 10mL of acrylic acid, 2.5g of sulfuric acid Iron, 0.15g triterpene saponins are used to stabilize the reaction system, react for 15min, then add 6.5g sodium hydroxide (gradually added) and 0.02g potassium persulfate, the reaction continues for 2.2h, the reaction state continues to be a turbid liquid with particles, reducing the reaction When the temperature reaches 33°C, add 6g of sodium sulfide and 12mL of water, and add 5.4mL of carbon disulfide three times (adding once every 15min). The addition is completed within the first 30min of the reaction, and the reaction is 55min to o...

Embodiment 2

[0034] A kind of embodiment of complexed nickel remover of the present invention, the preparation method of complexed nickel remover described in the present embodiment is as follows:

[0035] Take 50mL of water and 40g of thiocyanic acid in a three-necked flask, add 17.5mL of ethylenediamine, keep the reaction temperature at 25°C, gradually add 47.5mL of carbon disulfide, raise the temperature to 80°C, add 8mL of acrylic acid, 3g Iron sulfate, 0.1g triterpene saponins are used to stabilize the reaction system, react for 15min, then add 7g sodium hydroxide (gradually added) and 0.01g potassium persulfate, the reaction lasts for 2.5h, and the reaction state continues to be a turbid liquid with particles, reducing the reaction When the temperature reaches 30°C, add 5g of sodium sulfide and 11mL of water, and add 6mL of carbon disulfide three times (adding once every 15min). The addition is completed within the first 30min of the reaction, and the reaction is 50min to obtain a hig...

Embodiment 3

[0037] A kind of embodiment of complexed nickel remover of the present invention, the preparation method of complexed nickel remover described in the present embodiment is as follows:

[0038] Take 33.5mL of water and 40g of thiocyanic acid in a three-necked flask, add 13.4mL of ethylenediamine, keep the reaction temperature at 30°C, gradually add 30.15mL of carbon disulfide, raise the temperature to 85°C, add 12mL of acrylic acid, 2g iron sulfate, 0.2g triterpene saponins are used to stabilize the reaction system, react for 15min, then add 6g sodium hydroxide (gradually added) and 0.03g potassium persulfate, the reaction lasts for 2h, the reaction state continues to be a turbid liquid with particles, reducing the reaction When the temperature reaches 35°C, add 7g of sodium sulfide and 13mL of water, and add 4mL of carbon disulfide three times (adding once every 15min). The addition is completed within the first 30min of the reaction, and the reaction is 60min to obtain a high-...

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PUM

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Abstract

The invention discloses a complex nickel remover, a preparation method and application thereof, and belongs to the technical field of sewage treatment in environmental protection. The synthesis steps of the complexed nickel remover are as follows: take water, thiocyanate and ethylenediamine to react at 25-30°C, add carbon disulfide after a period of reaction, and then raise the temperature to 80-85°C, Add acrylic acid and ferric sulfate, stabilize the reaction system with triterpene saponins, add sodium hydroxide and potassium persulfate after 15 minutes of reaction, then react for 2-2.5 hours, then lower the reaction temperature to 30-35°C, add alkali sulfide and water, Add carbon disulfide three times and react for 50-60 minutes to obtain a high-concentration complex nickel remover. The complexed nickel remover is relatively stable and does not precipitate. Compared with other methods, the nickel removal efficiency is higher, and the complexed nickel can be removed without adding ferrous sulfate during application, which can reduce the amount of mud.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a nickel complex remover and its preparation method and application. Background technique [0002] Nickel is one of the most widely used plating types. But at the same time of nickel plating, a large amount of nickel-containing wastewater will be produced. As a heavy metal, nickel will accumulate in the environment and in animals and plants, affecting the growth and development of animals and plants; and the World Health Organization (WHO) lists it as one of the carcinogens, which will pose a serious threat to human health. [0003] Therefore, in order to ensure the sustainable development of the industry, my country has made regulations on the discharge standards of nickel-containing wastewater. According to the 2008 "National Discharge Standards for Pollutants in the Electroplating Industry" (GB21900-2008), the discharge standard for nickel-containin...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C02F1/62C02F103/16
CPCC02F1/62C02F2103/16
Inventor吴春丽石宗武
Owner深圳市点石源水处理技术有限公司