Recapture agent, preparation method and method for treating trivalent chromium in electroplating wastewater

A technology for electroplating wastewater and trivalent chromium, which is applied in the fields of metallurgical wastewater treatment, water/sewage treatment, chemical instruments and methods, etc. It can solve the problems of poor pertinence, poor electroplating wastewater treatment effect, and inability to meet standards in one-time treatment. , to achieve the effect of cost reduction, good treatment effect and strong treatment pertinence

Pending Publication Date: 2020-10-27
四川润邦利泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of recapture agent and preparation method and the method for treating lead ion in waste water, to solve the problem that the heavy metal catch agent in the prior art is widely used, but to the electroplating waste water containing low concentration trivalent chromium ion The treatment effect is not good, and the pertinence is not strong; for the electroplating wastewater containing high concentration of trivalent chromium ions, the one-time treatment cannot meet the standard, and the technical problem is that it needs to be recycled to meet the discharge standard

Method used

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  • Recapture agent, preparation method and method for treating trivalent chromium in electroplating wastewater
  • Recapture agent, preparation method and method for treating trivalent chromium in electroplating wastewater
  • Recapture agent, preparation method and method for treating trivalent chromium in electroplating wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A 500g small airtight reactor with temperature control is used to prepare a recapture agent for trivalent chromium ions in electroplating wastewater:

[0040] 1.1 Raw materials, the amount of raw materials is shown in Table 1 below:

[0041] Table 1 Embodiment 1 raw material list:

[0042]

[0043] 1.2 Preparation method, comprising the following steps:

[0044] (1) Alcohol water is mixed with mass concentration and is the alcohol solution of 40%; Hydroxide water is configured with mass concentration and is the hydroxide solution of 25%;

[0045] (2) Add hexamethylenediamine and the alcohol solution prepared in step (1) into the reaction vessel at a room temperature of 25°C, and mix and stir for 18 minutes to obtain a mixed solution A;

[0046] (3) The temperature of the mixed solution A in the reaction vessel was lowered to 5°C, and carbon disulfide was added dropwise to the reaction vessel at a constant speed under stirring, and the dropwise addition was complete...

Embodiment 2

[0051] A 500g small airtight reactor with temperature control is used to prepare a recapture agent for trivalent chromium ions in electroplating wastewater:

[0052] 2.1 Raw materials, the amount of raw materials is shown in Table 2 below:

[0053] Table 2 Embodiment 2 raw material table:

[0054]

[0055] 2.2 Preparation method, comprising the following steps:

[0056] (1) Alcohol water is mixed with mass concentration and is the alcohol solution of 60%; Hydroxide water is configured with mass concentration and is the hydroxide solution of 15%;

[0057](2) Add hexamethylenediamine and the alcohol solution prepared in step (1) into the reaction vessel at a room temperature of 25°C, and mix and stir for 15 minutes to obtain a mixed solution A;

[0058] (3) The temperature of the mixed solution A in the reaction vessel was lowered to 10°C, and carbon disulfide was added dropwise to the reaction vessel at a constant speed under stirring, and the dropwise addition was complet...

Embodiment 3

[0063] A 500g small airtight reactor with temperature control is used to prepare a recapture agent for trivalent chromium ions in electroplating wastewater:

[0064] 3.1 Raw materials, the amount of raw materials is shown in Table 3 below:

[0065] Table 3 Embodiment 3 raw material table:

[0066]

[0067] 3.2 Preparation method, comprising the following steps:

[0068] (1) Alcohol water is mixed with mass concentration and is the alcohol solution of 20%; Hydroxide water is configured with mass concentration and is the hydroxide solution of 40%;

[0069] (2) At room temperature, add hexamethylenediamine and the alcohol solution prepared in step (1) into the reaction vessel, and mix and stir for 18 minutes to obtain mixed solution A;

[0070] (3) Lower the temperature of the mixed solution A in the reaction vessel to 7°C, and add carbon disulfide dropwise to the reaction vessel at a constant speed under stirring; after the dropwise addition, keep the temperature at 7°C and...

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Abstract

The invention provides a recapture agent, a preparation method and a method for treating trivalent chromium in electroplating wastewater, and solves the problems that a heavy metal capture agent in the prior art is wide in application range, but the treatment effect on electroplating wastewater containing low-concentration trivalent chromium ions is not good, and the pertinence is not strong, andfor electroplating wastewater containing high-concentration trivalent chromium ions, one-time treatment cannot reach the standard, and the discharge standard can be reached only by circular treatment.The recapture agent is prepared from the following components in parts by weight: 2-9 parts of ethylenediamine; 10 to 25 parts of alcohols; 9-28 parts of carbon disulfide; 6 to 11 parts of hydroxide;0.05 to 0.6 part of sulfonate; 0.06 to 0.5 part of stearate; 38-66 parts of water. The recapture agent for treating trivalent chromium ions in the electroplating wastewater has a good treatment effect on the electroplating wastewater containing low-concentration trivalent chromium ions and the electroplating wastewater containing high-concentration trivalent chromium ions, is high in treatment pertinence, and can reach the emission standard through one-time treatment; and the unit dosage during treatment is small, and the wastewater treatment cost is low.

Description

technical field [0001] The invention relates to a heavy metal scavenger, in particular to a heavy metal scavenger, a preparation method and a method for treating trivalent chromium in electroplating wastewater. Background technique [0002] With the rapid development of the electroplating industry, the amount of electroplating wastewater containing chromium (Ⅲ) ions is increasing day by day, and the pollution of chromium (Ⅲ) ions will pose a serious threat to human health, life and survival. In order to alleviate and solve this problem, environmentalists around the world have invested a lot of research. Among them, the chemical precipitation method has become one of the main means of treating heavy metal wastewater due to its low cost and simple equipment requirements. [0003] At present, the heavy metal scavenger on the market is widely used, and the effect on low-concentration heavy metals is not good, and the pertinence is not strong. For high-concentration wastewater, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62C02F103/16C02F101/22
CPCC02F1/62C02F2103/16C02F2101/22
Inventor 陈林唐乾坤
Owner 四川润邦利泰科技有限公司
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