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Preparation process of environment-friendly adsorption material

A technology of adsorption material and preparation process, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of fast adsorption and desorption rate, weak binding force, secondary pollution, etc.

Pending Publication Date: 2021-07-09
铜陵博锋实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Industrial water pollutants mainly involve dyes, aromatic compounds (polycyclic aromatic hydrocarbons, etc.), heavy metals, radioactive substances, etc., which are discharged into the environment and greatly threaten human health and ecological balance. Existing wastewater treatment methods mainly include chemical precipitation, chemical Oxidation method, ion exchange method, membrane separation technology, adsorption method, etc. The adsorption method uses adsorbents with high specific surface area or special groups to enrich and remove pollutants such as heavy metal ions and organic dyes in wastewater. Simple operation, thorough pollutant treatment, small investment, etc., according to the different force between the adsorbent and the adsorption medium, it is divided into material adsorption and chemical adsorption. Physical adsorption is the intermolecular force between the adsorbent and the adsorbate. Produced by van der Waals force, it has the characteristics of small adsorption heat, weak binding force, no selectivity, and fast adsorption and desorption rate. It is generally multi-layer adsorption, chemical adsorption is stable and selective, and it is monomolecular layer adsorption. In the prior art , the adsorption effect of the adsorption material is poor, and it cannot be recycled. Some N and P content are high, and they are used for water pollution control, which is easy to cause eutrophication and secondary pollution of the water body. Therefore, it is necessary to improve an efficient, environmentally friendly and renewable adsorption Materials are a technical problem that needs to be solved at present

Method used

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  • Preparation process of environment-friendly adsorption material
  • Preparation process of environment-friendly adsorption material
  • Preparation process of environment-friendly adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Modified chitosan is made by the following steps:

[0029] Step A1, add 0.1mol chitosan and 160mL acetic acid solution with a mass fraction of 1% into a round bottom flask, stir for 4 hours at room temperature, then add a 35% mass fraction of sodium hydroxide solution to adjust the pH value to 7, and then transfer Place in an ice bath, control the reaction temperature at 0°C, add 0.1 mol of 2-chloroethoxyacetonitrile dropwise to the round bottom flask with a constant pressure dropping funnel, after the addition is complete, raise the temperature to 60°C, and continue to stir for 4 hours. After the reaction, add 35% sodium hydroxide solution into the round bottom flask to adjust the pH to 7, then purify and wash with methanol and acetone three times, and finally dry in an oven at 60°C to constant weight to obtain intermediate 1;

[0030] Step A2, add 1 g of intermediate 1 and 28 mL of methanolic aqueous solution of hydroxylamine hydrochloride with a mass fraction of 3% i...

Embodiment 2

[0033] Modified chitosan is made by the following steps:

[0034] Step A1, add 0.1mol chitosan and 185mL mass fraction of 1% acetic acid solution into a round bottom flask, stir for 5h at room temperature, then add 35% mass fraction of sodium hydroxide solution to adjust the pH value to 7, then Transfer to an ice bath, control the reaction temperature at 3°C, add 0.1mol of 2-chloroethoxyacetonitrile dropwise to the round bottom flask with a constant pressure dropping funnel, after the addition, raise the temperature to 60°C, and continue stirring for 5h After the reaction, add 35% sodium hydroxide solution to the round bottom flask to adjust the pH to 7, then purify and wash with methanol and acetone three times, and finally dry in an oven at 60°C to constant weight to obtain intermediate 1;

[0035] Step A2, add 1g of intermediate 1 and 33mL of methanolic aqueous solution of hydroxylamine hydrochloride with a mass fraction of 3% in a three-necked flask, control the reaction t...

Embodiment 3

[0038] Modified chitosan is made by the following steps:

[0039] Step A1, add 0.1mol chitosan and 220mL acetic acid solution with a mass fraction of 1% into a round bottom flask, stir at room temperature for 6h, then add a 35% mass fraction of sodium hydroxide solution to adjust the pH value to 8, and then transfer In an ice bath, control the reaction temperature at 5°C, dropwise add 0.1mol of 2-chloroethoxyacetonitrile into the round bottom flask with a constant pressure dropping funnel, after the addition, raise the temperature to 60°C, and continue stirring for 6h. After the reaction, add 35% sodium hydroxide solution into the round bottom flask to adjust the pH to 8, then purify and wash with methanol and acetone three times, and finally dry in an oven at 60°C to constant weight to obtain intermediate 1;

[0040] Step A2, add 1g of intermediate 1 and 35mL of methanolic aqueous solution of hydroxylamine hydrochloride with a mass fraction of 3% in a three-necked flask, cont...

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Abstract

The invention discloses a preparation process of an environment-friendly adsorption material, and belongs to the technical field of adsorption material preparation, and the preparation process comprises the following specific steps: adding modified chitosan, deionized water and absolute ethyl alcohol into a reactor, magnetically stirring for 2-4 hours, then adding modified Fe3O4, continuously stirring and reacting for 2 hours, then adding a glutaraldehyde solution with the mass fraction of 25%, stirring and reacting for 8 hours at the temperature of 40-45 DEG C, after the reaction is finished, filtering, drying a filter cake in a drying oven at 60 DEG C for 12 hours, then sequentially washing a dried product with an acetic acid solution with the mass fraction of 2% and distilled water once, and finally drying at 50 DEG C until the weight is constant, so as to obtain the environment-friendly adsorption material. By adding the modified chitosan and the modified Fe3O4, the prepared adsorption material has an excellent adsorption effect, also has an antibacterial property and a regeneration property, and has a relatively high utilization value in improvement of water body pollution.

Description

technical field [0001] The invention belongs to the technical field of adsorption material preparation, and in particular relates to a preparation process of an environmentally friendly adsorption material. Background technique [0002] With the rapid development of social economy, the contradiction between economic construction and ecological environment has become increasingly prominent. The pollution of copper, mercury, arsenic and chemical oxygen demand in river pollutants is increasing year by year. issues of public concern. [0003] Industrial water pollutants mainly involve dyes, aromatic compounds (polycyclic aromatic hydrocarbons, etc.), heavy metals, radioactive substances, etc., which are discharged into the environment and greatly threaten human health and ecological balance. Existing wastewater treatment methods mainly include chemical precipitation, chemical Oxidation method, ion exchange method, membrane separation technology, adsorption method, etc. The adso...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30
CPCB01J20/24B01J20/08B01J20/22
Inventor 何飞
Owner 铜陵博锋实业有限公司
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