Treatment method of (meth)acrylic acid wastewater

A technology of methacrylic acid and treatment method, which is applied in the field of chemical industry, can solve the problem of acrylic acid not being used as a resource, and achieve the effect of resource utilization, high efficiency and fast speed

Active Publication Date: 2020-02-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the treatment process has been greatly simplified, the acrylic acid in wastewater has not been used as a resource

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present embodiment uses waste water 1, puts the 250ml three-necked bottle that is equipped with electric stirrer, thermometer and nitrogen inlet and outlet pipe into water bath, adds waste water 1 and 0.1 gram photoinitiator 2959 (1w%), stirs, bubbles with nitrogen 15 minutes. Use the LED lamp to irradiate the glass bottle at a distance of 15cm for one minute, and the material in the bottle turns into a white gel-like solid. After the gel was taken out, it was dried in an oven at 120° C. to obtain 16 grams of hard lumps with a water content of about 10w%. Use an electric pulverizer to grind it into a fine powder, and measure the water absorption rate of pure water to 36 times according to the standard method.

Embodiment 2

[0027] In this example, waste water 1 is used, 10w% of AA, 0.08w% of photoinitiator 819 and 0.2w% of hydroxybenzophenone are added, the pH value is adjusted to about 8 with alkaline water, and the LED is illuminated for 120 seconds, and the rest are carried out in the same way Example 1. Dried to obtain about 32 grams of solids with a water content of about 10w%, and a water absorption rate of 112 times.

Embodiment 3

[0029]This example uses waste water 1, 20w% of AA, 2w% of sodium methallylsulfonate, adjusted to a pH of about 4 with KOH, 0.1w% of 2959 and 0.3w% of azobisisobutylamidine salt salt. After 60 seconds of LED light, it was placed in a water bath at 80°C for 4 hours. After drying treatment similar to Example 1, 47 grams of solids with a water content of about 10w% were obtained, and the water absorption rate was 500 times.

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PUM

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Abstract

The invention discloses a treatment method of (meth)acrylic acid wastewater. The method comprises the following steps: adding a vinyl monomer and an initiator into the (meth)acrylic acid wastewater, the wastewater is illuminated to form a gel-form polymer, and the polymer is dehydrated and dried to obtain a high-water-absorptivity material. The treatment method of acrylic acid wastewater has the advantages of low energy consumption, high efficiency and simple process, and can realize recycling of (meth)acrylate production wastewater.

Description

technical field [0001] Technical Field The present invention relates to the field of chemical technology, in particular to a treatment method for acrylic acid wastewater. Background technique [0002] The (meth)acrylic acid contained in the industrial wastewater produced in the production of (meth)acrylates is difficult to biodegrade, the treatment cost of the direct incineration method is too high, and the discharge after dilution will cause great damage to the water environment, so it needs to be harmless deal with. The treatment methods for (meth)acrylic acid wastewater include physical methods, chemical methods and biological methods, all of which require multi-step treatment that is time-consuming and high in operating costs. [0003] The existing treatment method, the application number is CN201710930729.2, and the application date is 20171009 invention patent, which discloses a comprehensive treatment method for acrylate production wastewater, which is obtained by ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/06C08F220/06C08F228/02C08F222/38C08F216/12C08F2/48
CPCC08F120/06C08F220/06C08F2/48C08F228/02C08F216/125C08F222/385
Inventor 王跃川徐燕
Owner SICHUAN UNIV
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