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Sulfydryl functional active carbon preparation method and mercury removal adsorbent

An activated carbon and functional technology, applied in the field of heavy metal adsorption, can solve the problems of reducing adsorption amount, reducing sulfhydrylation rate, pore blockage, etc., achieving the effect of strong mercury adsorption capacity, avoiding self-hydrolysis reaction and reducing cost.

Inactive Publication Date: 2020-01-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the new mercury removal material mercapto-functionalized activated carbon prepared by Xiao Lingling et al. uses mercaptopropyltrimethoxysilane in the preparation process, the solvent is a mixed solution of alcohol and water, and mercaptopropyltrimethoxysilane will dissolve in the reaction system containing water. A great degree of self-hydrolysis and condensation reaction occurs, so the addition of water in the reaction system brings many disadvantages, which will block the pores of the carrier material, reduce the amount of adsorption, and reduce the rate of sulfhydrylation, etc.

Method used

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  • Sulfydryl functional active carbon preparation method and mercury removal adsorbent

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Experimental program
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Effect test

Embodiment 1

[0052] First, add 10g of coal-based activated carbon into 50g of γ-mercaptopropyltrimethoxysilane n-heptane solution, add 0.3g of methyl titanate as a catalyst, and react at 100°C for 2h. After the reaction, the reaction product is heated at 150 ℃, cooled, washed, and dried to obtain the finished activated carbon adsorbent, namely sulfhydryl functional activated carbon, marked as 1#.

Embodiment 2

[0054] First, add 5g of coconut shell activated carbon into 50g of γ-mercaptopropyltrimethoxysilane toluene solution, add 0.2g of butyl titanate as a catalyst, and react at 80°C for 8h. After the reaction, the reaction product is pumped at 150°C. Drying, cooling, washing, and drying, the finished product activated carbon adsorbent is obtained, i.e. sulfhydryl functional activated carbon, marked as 2#.

Embodiment 3

[0056] First, add 5g of coconut shell activated carbon to 50ml of chloroform solution containing 2.3g of γ-mercaptopropyltriethoxysilane, add 0.1g of tert-butyl titanate as a catalyst, and react at 60°C for 10h. After the reaction, the reaction product Pump dry at 150° C., cool, wash, and dry to obtain the finished activated carbon adsorbent, that is, sulfhydryl functional activated carbon, marked as 3#.

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Abstract

The invention discloses a sulfydryl functional active carbon preparation method, which at least comprises: carrying out a reaction on a solution containing sulfydryl silicone grease and active carbonin the presence of a catalyst, and carrying out high-temperature pumping-out to obtain the sulfydryl functional active carbon, wherein the reaction is an anhydrous reaction system. According to the invention, the prepared sulfydryl functional active carbon as the adsorbent has excellent properties of high adsorption rate, strong mercury adsorption capacity and the like; and the method is simple and convenient in process and low in cost, is suitable for mercury removal treatment of wastewater in mercury-related industry, and has huge prospects in industrial production and application.

Description

technical field [0001] The application relates to a preparation method of mercapto-functional activated carbon and a mercury-removing adsorbent, which belong to the field of heavy metal adsorption. Background technique [0002] Mercury (Hg) is the 80th element in the periodic table, belongs to the transition metal elements, and is the only metal element that is liquid at room temperature. Mercury is a highly toxic substance and one of the most toxic heavy metal elements in the environment. The toxic valences are monovalent and divalent, and can be transformed into highly toxic methylmercury. The toxicity of various mercury compounds is very different. Large, the toxicity of mercury lasts for a long time, and mercuric chloride in inorganic mercury is a highly toxic substance; methylmercury in organic mercury is easily absorbed when it enters the human body, is not easy to degrade, and is excreted very slowly, especially it is easy to accumulate in the brain. Most toxic. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/22C02F1/283C02F1/285C02F2101/20
Inventor 刘亚男吴雅琪刘广业刘中民徐云鹏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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