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Method for recycling chloroprene rubber industrial wastewater

A technology of industrial wastewater and chloroprene rubber, which is applied in water/sewage treatment, natural water treatment, neutralized water/sewage treatment, etc. It can solve problems such as reducing recycling costs, easy to block reverse osmosis membranes, and difficult separation of copper ions. Achieve the effect of improving production efficiency, reducing production cost and simple process

Inactive Publication Date: 2020-10-27
李昌欣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to: aim at the above existing problems, provide a method for recycling and treating neoprene rubber industrial wastewater, which can solve the problem that copper ions in neoprene rubber industrial wastewater are difficult to separate and easily block the reverse osmosis membrane, and reduce the cost of recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for recovery and treatment of chloroprene rubber industrial wastewater is characterized in that it comprises the following steps:

[0034] Step 1: adjusting the pH value of the neoprene rubber industrial wastewater after biochemical treatment to 7-8;

[0035] Step 2: Calculate the total amount of copper ions in the waste liquid, and add 1 mol / L potassium phosphate solution to the waste water obtained in step 1 according to 1 times the total amount of copper ions, to produce a suspension containing copper phosphate;

[0036] Step 3: Add an oxidizing agent to the suspension in Step 2, heat to 70°C, and react for 10 hours to obtain a suspension containing copper hydroxyphosphate;

[0037] Step 4: Filter the suspension obtained in Step 3 to obtain copper hydroxyphosphate.

[0038] Step five: washing the copper hydroxyphosphate obtained in step four with deionized water and ethanol for 2-3 times, and then drying at 60°C to obtain a purified copper hydroxyphosphate ...

Embodiment 2

[0041] A method for recovery and treatment of chloroprene rubber industrial wastewater is characterized in that it comprises the following steps:

[0042] Step 1: adjusting the pH value of the neoprene rubber industrial wastewater after biochemical treatment to 7-8;

[0043] Step 2: Calculate the total amount of copper ions in the waste liquid, and according to 1.1 times of the total amount of copper ions, add 2mol / L potassium phosphate solution to the waste water obtained in step 1 to produce a suspension containing copper phosphate;

[0044] Step 3: Add an oxidizing agent to the suspension in Step 2, heat to 75° C., and react for 9 hours to obtain a suspension including copper hydroxyphosphate;

[0045] Step 4: Filter the suspension obtained in Step 3 to obtain copper hydroxyphosphate.

[0046] Step five: washing the copper hydroxyphosphate obtained in step four with deionized water and ethanol for 2-3 times, and then drying at 60°C to obtain a purified copper hydroxyphosph...

Embodiment 3

[0049] A method for recovery and treatment of chloroprene rubber industrial wastewater is characterized in that it comprises the following steps:

[0050] Step 1: adjusting the pH value of the neoprene rubber industrial wastewater after biochemical treatment to 7-8;

[0051] Step 2: Calculate the total amount of copper ions in the waste liquid, and according to 1.2 times of the total amount of copper ions, add 3mol / L potassium phosphate solution to the waste water obtained in step 1 to produce a suspension containing copper phosphate;

[0052] Step 3: Add an oxidizing agent to the suspension in Step 2, heat to 80°C, and react for 8.5 hours to obtain a suspension including copper hydroxyphosphate;

[0053] Step 4: Filter the suspension obtained in Step 3 to obtain copper hydroxyphosphate.

[0054] Step five: washing the copper hydroxyphosphate obtained in step four with deionized water and ethanol for 2-3 times, and then drying at 60°C to obtain a purified copper hydroxyphosph...

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Abstract

The invention discloses a method for recycling chloroprene rubber industrial wastewater. The method is characterized by comprising the following steps: step 1, regulating the pH value of the chloroprene rubber industrial wastewater subjected to biochemical treatment to 7-8; step 2, continuously adding a soluble phosphate solution into the wastewater obtained in the step 1 to produce a turbid liquid containing copper phosphate; step 3, adding an oxidizing agent into the turbid liquid obtained in the step 2, heating to 70-90 DEG C, and reacting for 7-10 hours to obtain turbid liquid containing copper hydroxyphosphate; and step 4, filtering the turbid liquid obtained in the step 3 to obtain copper hydroxyphosphate. A soluble phosphate solution is added, copper phosphate precipitates are produced, copper phosphate and copper phosphate can react under the heating condition to generate hydroxyl copper phosphate, organic matter in the waste liquid is degraded, copper ions in the waste liquidcan be removed, degradation of the organic matter can be synchronously conducted, the production efficiency is effectively improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of industrial waste water treatment, in particular to a method for recycling and treating neoprene rubber industrial waste water. Background technique [0002] Neoprene is a synthetic rubber made by the polymerization of chloroprene. It has good comprehensive properties such as oil resistance, flame resistance, oxidation resistance and ozone resistance, and has been widely used. However, the common method of producing neoprene is the calcium carbide method, which produces a large amount of high-concentration organic wastewater during the production process. Chloroprene rubber industrial wastewater is based on acetylene generator, vinyl acetylene (MVA) synthetic droplet separator and water washing tower, chloroprene (CD) synthetic brine washing tower polymer separator, chloroprene (CD) Synthetic tail gas absorption tower, toluene recovery tower tail gas condenser, latex I and II separators and chelating resin, etc. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01B25/37C02F103/38C02F101/20
CPCC01B25/37C02F1/001C02F1/441C02F1/62C02F1/66C02F1/722C02F1/725C02F9/00C02F2101/20C02F2103/38
Inventor 李昌欣
Owner 李昌欣