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Comprehensive utilization method of waste liquor in production of basic cupric carbonate

A technology of copper carbonate and waste liquid, applied in the direction of copper nitrate, copper sulfate, copper halide, etc., can solve the problems of waste of resources, consumption of sulfuric acid, environmental pollution, etc., and achieve the effect of reducing production costs, reducing processing costs, and easing the reaction process

Active Publication Date: 2013-12-18
SHENZHEN SHENTOU ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these waste liquids are discharged directly, it will not only pollute the environment, but also cause a waste of resources.
[0004] At present, there are few bibliographical reports about the recycling of basic copper carbonate production waste liquid resources, only Chinese patent application CN102897802A discloses a method for reclaiming reagent grade anhydrous sodium sulfate from basic copper carbonate production waste liquid, but it ignores In order to recycle the sodium bicarbonate that exists in a large amount in the waste liquid, it chooses to neutralize it by adding sulfuric acid, which not only consumes a large amount of sulfuric acid, but also causes a great waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Collect the waste liquid (chlorinated waste liquid) after the reaction of acidic copper chloride solution and sodium carbonate solution to produce basic copper carbonate. Sampling and testing found that it contains 84.6g / L of sodium bicarbonate and 140.7g / L of sodium chloride. L;

[0029] (2) Add a small amount of distilled water into the reaction kettle, turn on the stirring device, and raise the temperature to 35°C at the same time, then add the self-prepared 2mol / L copper chloride solution and the chlorine-containing waste liquid in step (1) to the reactor at the same time In the reactor, control the pH to be 6.0;

[0030] (3) After the feed-liquid pair is added, the reaction temperature and pH value are kept constant, and the reaction is continued for 30 minutes to obtain the reaction product;

[0031] (4) The reaction product obtained in step (3) is centrifugally filtered, washed with water, dried at 100°C, crushed and passed th...

Embodiment 2

[0034] (1) Collect the waste liquid (sulfate-containing waste liquid) after the reaction of acidic copper sulfate solution and sodium carbonate solution to produce basic copper carbonate. Sampling and detection showed that it contained 75.1g / L of sodium bicarbonate and 154.2g / L of sodium sulfate ;

[0035] (2) Add a small amount of distilled water into the reaction kettle, turn on the stirring device, and raise the temperature to 60°C at the same time, then add the self-prepared 1mol / L copper sulfate solution and the sulfate-containing waste liquid from step (1) to the reactor at the same time. In the reactor, control the pH to be 4.5;

[0036] (3) After the feed-liquid pair is added, the reaction temperature and pH value are kept constant, and the reaction is continued for 60 minutes to obtain the reaction product;

[0037] (4) The reaction product obtained in step (3) is filtered, washed with water, dried at 100°C, crushed and passed through ...

Embodiment 3

[0041] (1) Collect the waste liquid (chlorinated waste liquid) after the reaction of acidic copper chloride solution and sodium carbonate solution to produce basic copper carbonate. Sampling and testing found that it contains 84.6g / L of sodium bicarbonate and 140.7g / L of sodium chloride. L;

[0042] (2) Add industrial-grade sodium carbonate to the above-mentioned chlorine-containing waste liquid in an amount of 50g / L;

[0043] (3) Add a small amount of distilled water into the reaction kettle, turn on the stirring device, and raise the temperature to 90°C at the same time, then add the self-prepared 1.5mol / L copper nitrate solution and the chlorine-containing waste liquid in step (2) to the reactor at the same time In the reactor, control the pH to be 3.0;

[0044] (4) After the addition of the feed-liquid pair is completed, the reaction temperature and pH value are kept constant, and the reaction is continued for 10 minutes to obtain the reacti...

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Abstract

The invention discloses a comprehensive utilization method of waste liquor in the production of basic cupric carbonate and relates to the field of treatment methods of industrial wastewater. The invention aims at providing a comprehensive utilization method of waste liquor in the production of basic cupric carbonate, and in particular relates to a method for reusing sodium bicarbonate in the waste liquor. The waste liquor in the production of the basic cupric carbonate is the waste liquor generated after the basic cupric carbonate is produced by a reaction between an acidic copper chloride solution or an acidic copper sulfate solution and a sodium carbonate solution. The comprehensive utilization method of the waste liquor in the production of the basic cupric carbonate mainly comprises the following steps: adding a little distilled water into a reaction kettle as a base solution; when the reaction temperature rises to 35-90 DEG C, starting a stirring device, and adding the waste liquor containing sulfate radicals or chlorine and the acidic copper solution into the reaction kettle for reaction, wherein the pH value during the addition of the solutions is controlled to be 3-6; and filtering, washing, drying and sieving reaction products to obtain the basic copper salt. The method disclosed by the invention is simple to operate, easy to control reaction conditions, and widely applicable to the recycling and reusing of the waste liquor in the production of basic cupric carbonate.

Description

technical field [0001] The invention relates to a treatment method for industrial waste water, in particular to a comprehensive utilization method for production waste liquid of basic copper carbonate. Background technique [0002] Basic copper carbonate is a raw material for the synthesis of copper salt and copper oxide. Its production method is generally prepared by reacting an acidic copper-containing solution (copper chloride or copper sulfate) with a sodium carbonate solution. The following reactions mainly occur: [0003] In the production process of basic copper carbonate, about 8 cubic meters of waste liquid will be produced per ton of product. The waste liquid is weakly alkaline, with a pH value of about 8-9. The waste liquid contains a large amount of sodium bicarbonate and sodium salt (sulfuric acid Sodium or sodium chloride), the content of sodium bicarbonate is about 80g / L-110g / L, and it is close to saturation when the concentration is high, while the content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/05C01G3/10C01G3/08
Inventor 陈志传毛谙章周兆安李钧张银亮刘小文廖春华易海洋
Owner SHENZHEN SHENTOU ENVIRONMENT TECH CO LTD
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