Method for treating dimethylamine waste water by using weakly acidic cation exchange resin

A cation exchange, dimethylamine technology, applied in ion exchange water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problem of unrealized dimethylamine treatment, high operating costs, and large equipment investment and other problems, to achieve good economic and social benefits, cost savings, and no secondary pollution.

Inactive Publication Date: 2011-05-18
马剑华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stripping method only desorbs part of the dimethylamine in the water and transfers it to the air, and does not realize the real treatment of dimethylamine; the distillation method requires large equipment investment and high energy consumption
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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 adsorption

[0020] Put 30g of 110-type weakly acidic cation exchange resin into the adsorption column (φ30×600mm). Pass DMA wastewater (800-1000mg / L) at room temperature through the resin bed at a flow rate of 5-15ml / min, and the treatment capacity is 11000ml-12000ml. After resin treatment, the DMA content in the wastewater is lower than 24-30mg / L , DMA removal rate is 96%.

Embodiment 2

[0021] Example 2 adsorption

[0022] Put 30g of 111-type weakly acidic cation exchange resin into the adsorption column (φ30×600mm). Pass DMA wastewater (800-1000mg / L) at room temperature through the resin bed at a flow rate of 5-15ml / min, and the treatment capacity is 11000ml-12000ml. After resin treatment, the DMA content in the wastewater is lower than 24-30mg / L , DMA removal rate is 96%.

Embodiment 3

[0023] Example 3 adsorption

[0024] Put 30g of DK110 type weakly acidic cation exchange resin into the adsorption column (φ30×600mm). Pass the DMA wastewater (800-1000mg / L) at room temperature through the resin bed at a flow rate of 20ml / min, and the treatment capacity is 8000ml-9000ml. After resin treatment, the DMA content in the wastewater is lower than 24-30mg / L, DMA The removal rate is 96%.

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PUM

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Abstract

The invention relates to a method for treating dimethylamine waste water by using weakly acidic cation exchange resin, which comprises the following steps: filtering waste water to remove suspended matters, adsorbing the filtered waste water at ordinary temperature by using weakly acidic cation exchange resin; and after the resin which adsorbs dimethylamine tends to be saturated, eluting the dimethylamine with a phosphoric acid, hydrochloric acid or sulfuric acid solution to regenerate the resin. By using the method, the dimethylamine removal rate in the waste water is higher than 96%, and the waste water can be recycled. After desorption, the dimethylamine forms corresponding dimethylamine salts, and the dimethylamine salts can be recycled or directly discharged into a sewage tank. The method has the advantages of simple technique, reliable technology, low processing cost and no secondary pollution, is convenient to operate, and converts dimethylamine waste water into innocuous substances in deed.

Description

technical field [0001] The invention relates to a method for treating waste water in the artificial leather industry, in particular to a method for treating dimethylamine waste water with a weakly acidic cation exchange resin. Background technique [0002] Dimethylamine is a gas at room temperature, has an ammonia-like smell, is easily soluble in water, soluble in ethanol and ether, is flammable, has weak alkalinity, and forms water-soluble salts with inorganic acids. Dimethylamine is highly irritating, and when the content in the wastewater is low, there will be an unpleasant fishy smell, and if the concentration is high, it will have a strong irritating effect on the eyes and respiratory tract. [0003] Dimethylamine (DMA) is the most widely used and most demanded among methylamines. It is widely used in various industrial fields such as pesticides, medicine, organic synthesis, rubber, and leather, as well as in the production of plastics and ion exchange resins. , cataly...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/42C02F101/38
Inventor 马剑华陈然振
Owner 马剑华
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