A kind of multi-layer structure defluorination agent and its preparation method and application

A multi-layer structure, fluoride removal technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. The problem of high equipment requirements, to achieve good fluorine removal effect, easy separation, and low equipment requirements

Active Publication Date: 2021-07-20
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the chemical precipitation method is simple in operation and the process is short, but the effluent often fails to meet the requirements of fluoride ion discharge, and the secondary pollution is serious; due to the limited adsorption capacity, the adsorption method can only absorb waste water with a small concentration, and the treatment process is relatively complicated. , the adsorption capacity of the adsorbent will also decrease with the increase of the adsorption times.
The electrochemical method is not suitable for industrial treatment of large amounts of fluorine-containing wastewater due to high operating costs and high requirements for equipment and equipment.

Method used

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  • A kind of multi-layer structure defluorination agent and its preparation method and application
  • A kind of multi-layer structure defluorination agent and its preparation method and application
  • A kind of multi-layer structure defluorination agent and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of fluorine-removing materials at different heating temperatures

[0043] 1. Preparation of fluoride removal materials

[0044] In the first step, add 5.0 g of nano-CaCO to the round bottom flask 3 , 0.2g polyethylene glycol and 0.2g surfactant sodium dodecyl sulfonate, then measure 100ml of water and add it to a round bottom flask, stir and disperse fully for 30min, then add the monomer DMAEA dissolved in the initiator, wherein the initiator It is dimethyl azobisisobutyrate, the dosage is 0.7g, and the dosage of monomer is 2ml, continue to stir and disperse;

[0045] In the second step, after stirring for 30 minutes, the temperature was raised to 50°C, and 5.0 g of vinyl monomer acrylamide was added to the reaction vessel, and the temperature control reaction was continued for 30 minutes;

[0046]In the third step, the temperature is raised to 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, and the ethylenic monomer styrene dissolved with the initiator is added. The ...

Embodiment 2

[0054] 1. Preparation of fluoride removal materials

[0055] In the first step, add 5.0 g of nano-CaCO to the round bottom flask 3 1. Add calcium phosphate 0.1g, 0.2g, 0.3g, 0.4g, 0.5g, 0.6g and 0.2g of surfactant sodium dodecylsulfonate respectively, then measure 100ml of solvent water into the round bottom flask, stir and disperse for 30min Finally, add the monomer DMAEA that dissolves initiator, initiator is dimethyl azobisisobutyrate, consumption 0.7g, monomer DMAEA consumption 2.0ml, continue to stir and disperse;

[0056] In the second step, after stirring for 30 minutes, the temperature was raised to 50°C, and 5.0 g of ethylenic monomer acrylamide was added to the reaction vessel, and the temperature control reaction was continued for 30 minutes;

[0057] In the third step, raise the temperature to 70°C, add the ethylenic monomer styrene dissolved with the initiator, the initiator is dimethyl azobisisobutyrate, the dosage is 0.7g, the dosage of styrene is 7ml, and then...

Embodiment 3

[0064] Preparation of fluorine-removing materials with different monomer DMAEA dosages

[0065] 1. Preparation of fluoride removal materials

[0066] In the first step, add 5.0 g of nano-CaCO to the round bottom flask 3 , 0.2g polyethylene glycol and 0.2g surfactant sodium dodecyl sulfonate, then measure 100ml of solvent water and add it to a round bottom flask, fully stir and disperse for 30min, then add monomer DMAEA 0ml dissolved in initiator, 1ml, 2ml, 3ml, 4ml, 5ml, 6ml, the initiator is dimethyl azobisisobutyrate, the dosage is 0.7g, continue to stir and disperse;

[0067] In the second step, after stirring for 30 minutes, the temperature was raised to 50° C., and 5.0 g of vinyl monomer acrylamide was added into the reaction vessel. Continue temperature control reaction for 30min;

[0068] In the third step, raise the temperature to 70°C, add the ethylenic monomer styrene dissolved with the initiator, the initiator is dimethyl azobisisobutyrate, the dosage is 0.7g, th...

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Abstract

The patent of the present invention discloses a multi-layer structure fluoride removal agent, including a three-layer structure: the inner layer is an inorganic nano-material; the middle layer is a polymer layer with amino groups; the outer layer is a copolymerization of a hydrophilic segment and a hydrophobic segment. The formed copolymer layer. The present invention also provides a preparation method for the above-mentioned fluorine-removing material: (1) disperse the inorganic nanomaterial, vinyl monomer A, initiator, dispersant and surfactant in the reaction medium, stir while heating, and react for 0.5- 2h to obtain reaction solution I; (2) vinyl monomer B, vinyl monomer C, crosslinking agent and initiator are added in reaction solution I, temperature control reaction 0.5-2h; (3) be heated up to 55-75 ℃, stop heating after reacting for 6-12h; (4) After cooling, wash and dry. The fluoride removal material prepared by the invention has higher fluoride removal performance for polluted acid wastewater with different fluoride ion concentrations and different acidities. In addition, the fluorine removal material can be recycled, which has a good advantage over the traditional fluorine removal technology.

Description

technical field [0001] The invention relates to the treatment of non-ferrous metal smelting sewage acid and the application field of common fluorine-containing wastewater for defluorination, in particular to a preparation method of a fluorine-removing material and its application to non-ferrous metal smelting sewage acid. Background technique [0002] The non-ferrous metal smelting industry produces a large amount of acidic wastewater, which brings a series of environmental problems and poses a great threat to human survival and life. According to statistics, in my country's total industrial production wastewater, the discharge of fluorine-containing waste acid produced by the metallurgical manufacturing industry accounts for a large proportion, accounting for about 15%. The composition of acid wastewater is complex and diverse. If the waste water is discharged directly without treatment, it will not only waste water resources, corrode pipelines, and cause economic losses, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C08F120/34C08F220/56C08F212/08C08F220/36C02F101/14C02F103/16
CPCC02F1/583C02F2101/14C02F2103/16C08F120/34C08F220/56C08F212/08C08F220/36
Inventor 李盛彪贾泳泳储志忠王悦冯兵兵曹炜灿刘奔康蕾
Owner HUAZHONG NORMAL UNIV
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