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Method for preparing adsorption resin through using (methyl)acrylic acid production wastewater as raw material

A technology for methacrylic acid and wastewater production, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., to achieve the effects of simple process, COD reduction, and a wide range of heavy metals

Active Publication Date: 2015-07-08
辽宁华泰环保科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research in this area has not been reported at home and abroad.

Method used

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  • Method for preparing adsorption resin through using (methyl)acrylic acid production wastewater as raw material
  • Method for preparing adsorption resin through using (methyl)acrylic acid production wastewater as raw material
  • Method for preparing adsorption resin through using (methyl)acrylic acid production wastewater as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The wastewater used in this example is methacrylic acid wastewater, and its composition is shown in Table 1; the method of this example is as follows: directly enter the evaporator for heating and evaporating the wastewater, and after the steam is condensed, it can be neutralized with alkali to recover sodium acetate. When the volume of the remaining waste liquid after evaporation is about 5% of the volume of the original waste water, the material is discharged to obtain a viscous mixed polymer, which is then dried. Weigh 50g of mixed polymer, add 25g of phenolic resin (based on resin mass), stir and mix evenly, glue and solidify at 150°C for 120min, cool to room temperature in a desiccator, crush, sieve, and take 80-200 mesh The parts in between were soaked in 1mol / L sodium hydroxide solution for 12 hours, washed with water until neutral, and dried at 105°C. The heavy metal adsorption resin can be obtained.

Embodiment 2

[0028] The wastewater used in this example is methacrylic acid wastewater, and its composition is shown in Table 1; the method of this example is as follows: directly enter the evaporator for heating and evaporating the wastewater, and after the steam is condensed, it can be neutralized with alkali to recover sodium acetate. When the volume of the remaining waste liquid after evaporation is about 5% of the volume of the original waste water, the material is discharged to obtain a viscous mixed polymer, which is then dried. Weigh 50g of the mixed polymer, add 50g of phenolic resin (calculated by resin mass), stir and mix evenly, glue and solidify at 150°C for 120min, cool to room temperature in a desiccator, crush, sieve, and take 80-200 mesh The parts in between were soaked in 1mol / L sodium hydroxide solution for 12 hours, washed with water until neutral, and dried at 105°C. That is, the heavy metal adsorption resin is obtained.

Embodiment 3

[0030] The waste water used in this embodiment is methacrylic acid waste water, and its composition is shown in Table 1; the method of this embodiment is as follows: directly enter the evaporator for heating and evaporating the waste water, and after the steam is condensed, it can be neutralized with alkali to recover sodium acetate. When the volume of the remaining waste liquid after evaporation is about 5% of the volume of the original waste water, the material is discharged to obtain a viscous mixed polymer, which is then dried. Weigh 50g of mixed polymer, add 60g of phenolic resin (based on resin mass), stir and mix evenly, glue and solidify at 150°C for 120min, cool to room temperature in a desiccator, crush, sieve, and take 80-200 mesh The parts in between were soaked in 1mol / L sodium hydroxide solution for 12 hours, washed with water until neutral, and dried at 105°C. That is, the heavy metal adsorption resin is obtained.

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Abstract

A method for preparing an adsorption resin through using (methyl)acrylic acid production wastewater as a raw material comprises the following steps: carrying out a condensation polymerization reaction of acrylic acid, methacrylic acid and aldehyde under heating stirring conditions to generate a macromolecular high-boiling-point mixed polymer containing a carboxyl group and the like, carrying out adhesive curing of the mixed polymer by a water-soluble phenolic resin, and carrying out alkali activation to prepare a heavy metal adsorption resin; allowing low-boiling-point acetic acid to evaporate with water, neutralizing by an alkali, carrying out evaporative concentration, carrying out cooling crystallization, and recovering crystallized sodium acetate. The method for preparing the heavy metal adsorption resin belongs to the salvaging field, substantially reduces COD in the (methyl)acrylic acid wastewater, can be used for preparing heavy metal adsorbents, and has the advantages of wide range of suitable heavy metals, simple and stable process, easy control, low cost, and high economic, social and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing an adsorption resin from (meth)acrylic acid production wastewater as a raw material. Background technique [0002] Both methacrylic acid and acrylic acid are important chemical raw materials, and a large amount of wastewater will be produced in the production process. The wastewater contains a large amount of acetic acid, methacrylic acid, acrylic acid, aldehydes and toluene and other organic substances, and the chemical oxygen demand (CODcr) is as high as Tens of thousands to hundreds of thousands of mg / L belong to high-concentration organic wastewater. [0003] At present, the treatment methods for high-concentration organic wastewater such as (meth)acrylic acid production wastewater mainly include incineration, biochemical and catalytic wet oxidation (Zhang Yongwei, "Industrial Water Treatment", 2012, Volume 32, Issue 4: p17-20) . Among these...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08G6/00C08L61/06C08L33/02C08L59/00B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 王敏张东方得安黄先顺
Owner 辽宁华泰环保科技集团有限公司
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