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Heavy metal sulfydryl adsorption material and preparation method thereof

A technology for adsorption materials and heavy metals, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of low modification efficiency of mercapto resin, achieve good treatment effect, high removal rate, and reduce production cost effect

Active Publication Date: 2021-06-18
中铝环保生态技术(湖南)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the present invention overcomes the shortcoming of low modification efficiency of mercapto resin obtained by direct modification of white balls in the conventional method, which is beneficial to improving the utilization rate of raw materials, reducing production costs, and improving the adsorption capacity of heavy metals. The purpose of the present invention is to provide a Heavy metal thiol adsorption material, the structural formula of the thiol functional group structural unit is as follows:

Method used

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  • Heavy metal sulfydryl adsorption material and preparation method thereof
  • Heavy metal sulfydryl adsorption material and preparation method thereof
  • Heavy metal sulfydryl adsorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1. Add 72g of acrylic acid and 7.82g of mercaptoethanol to the reactor, add 1.9g of p-toluenesulfonic acid and 400ml of THF under stirring conditions, heat and reflux at 70°C for 4h to obtain mercaptoethyl acrylate, and distill under reduced pressure, Washed three times with water and dried to obtain mercaptoethyl acrylate.

[0023] Step 2. mix the obtained mercaptoethyl acrylate with 13g divinylbenzene press, add 1g benzoyl peroxide, obtain oily phase; then, add 500mL deionized water containing 0.05%~0.1% polyvinyl alcohol, in Under stirring conditions, the oil phase is dispersed into oil beads in the water phase, and the diameter of the oil beads is controlled. At the same time, it is heated to 60°C and reacted for 6 hours to carry out a polymerization reaction. After the reaction, cool and filter to obtain a mercapto alcohol-modified acrylic acid polymer. .

[0024] Synthesis shown in table 1 is carried out with reference to the method described in example 1 st...

Embodiment 2

[0029] Add 72g of acrylic acid and 93.76g of mercaptoethanol into the reactor, add 7g of p-toluenesulfonic acid and 600ml of THF under stirring conditions, heat and reflux at 70°C for 5h to obtain mercaptoethyl acrylate, distill under reduced pressure, and wash with water three times. Dry to obtain product mercapto acrylate. Mix the obtained mercaptoethyl acrylate with 13 g of divinylbenzene, add 1 g of benzoyl peroxide to obtain an oil phase; then, add 500 mL of deionized water containing 0.05% to 0.1% of polyvinyl alcohol, and stir The oil phase is dispersed into oil droplets in the water phase, and the diameter of the oil droplets is controlled. At the same time, it is heated to 60° C. for 6 hours to carry out a polymerization reaction. After the reaction, it is cooled and filtered to obtain a mercapto alcohol-modified acrylic acid polymer.

Embodiment 3

[0031] Add 72g of acrylic acid and 10.6g of 2-mercapto-3-butanol into the reactor, add 2g of p-toluenesulfonic acid and 400ml of THF under stirring conditions, heat and reflux at 70°C for 2h to obtain mercaptobutyl acrylate, and distill under reduced pressure , washed with water three times, and dried to obtain the product mercaptobutyl acrylate. Mix the obtained mercaptobutyl acrylate with 15g of divinylbenzene, add 1g of benzoyl peroxide to obtain an oil phase; then, add 500mL of deionized water containing 0.05% to 0.1% of polyvinyl alcohol, and stir The oil phase is dispersed into oil droplets in the water phase, and the diameter of the oil droplets is controlled. At the same time, it is heated to 60° C. for 6 hours to carry out a polymerization reaction. After the reaction, it is cooled and filtered to obtain a mercapto alcohol-modified acrylic acid polymer.

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Abstract

The invention discloses a heavy metal sulfydryl adsorption material and a preparation method thereof. The preparation method comprises the following steps: adding acrylic acid and mercapto alcohol into a reactor, adding a catalyst p-toluenesulfonic acid or sulfuric acid and an organic solvent under a stirring condition, mixing the obtained acrylic acid mercapto ester with divinyl benzene, adding an initiator to obtain an oil phase, adding polyvinyl alcohol, dispersing the oil phase into oil droplets in a water phase under a stirring condition, carrying out polymerization reaction, and cooling and filtering to obtain mercapto alcohol modified acrylic polymer resin. According to the method, each structural unit on a macromolecular chain contains one sulfydryl molecule, so that the resin with high sulfydryl content is obtained, the defect of low modification efficiency of sulfydryl resin obtained by using white balls for direct modification in a conventional method is overcome, the utilization rate of raw materials is increased, the production cost is reduced, the antimony adsorption capacity is improved, and a good treatment effect on other heavy metals is achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a heavy metal sulfhydryl adsorption material and a preparation method thereof. Background technique [0002] Heavy metal pollution is currently the most serious pollution, and it is also one of the most difficult to deal with and one of the most harmful pollution to human body. Since heavy metals cannot be decomposed and destroyed, the current treatment methods for them are to separate them from wastewater by phase transfer. Chinese patent 201811283274.0 discloses that the thiol unit structure of a mercury ion adsorption resin is The mercapto-containing mercury ion adsorbent has the disadvantages of complex preparation process, high preparation cost, and low adsorption capacity, which limit its practical application in the treatment of mercury ion-containing wastewater. The mercapto-containing resin has a weak adsorption capacity and a low adsorption capaci...

Claims

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Application Information

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IPC IPC(8): C08F220/38C08F212/36B01J20/26B01J20/30C02F1/28C02F101/20
CPCC08F220/38C08F212/36B01J20/262C02F1/285B01J2220/4812C02F2101/20Y02P10/20
Inventor 马昆鹏王密黄涛曹楚彦孟云峰彭川罗程
Owner 中铝环保生态技术(湖南)有限公司
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