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A kind of composite defluorinating agent and preparation method thereof

A kind of fluoride removal agent and composite technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problem of fluoride ions not reaching the standard discharge, and achieve the effect of fluoride removal. Good, prolong the cleaning cycle, improve the effect of utilization

Active Publication Date: 2022-01-25
SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve one of the above-mentioned problems, the present invention proposes a composite defluorinating agent and its preparation method. The defluorinating agent prepared in the present invention can deeply remove fluorine, and solve the problem that the fluorine ion in wastewater treated by the simple calcium salt method cannot meet the discharge standard. And it can effectively prevent the pipe scaling problem caused by calcium defluoridation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example discloses a composite defluorination agent, which is prepared from the following components according to mass percentage: 15 parts of polyaspartic acid-sulfonated styrene copolymer, 5 parts of zinc salt, 8 parts of acid, iron 30 parts of salt, 3 parts of cationic starch ether quaternary ammonium salt, 39 parts of water.

[0035] In this embodiment, the preparation method of above-mentioned polyaspartic acid-sulfonated styrene copolymer comprises the following steps:

[0036] 1) Add polyaspartic acid, sulfonated styrene, deionized water and catalyst to the reactor in sequence, heat in a constant temperature water bath, stir to dissolve polyaspartic acid and sulfonated styrene, add hydrogen The pH value of the sodium oxide solution is maintained at 8.5 to obtain a reaction solution;

[0037] 2) Under a nitrogen atmosphere, maintain the temperature at 75°C, add the initiator dropwise to the reaction solution at a constant speed, heat to reflux and stir mechan...

Embodiment 2

[0051] This example discloses a composite defluorination agent, which is prepared from the following components according to mass percentage: 15 parts of polyaspartic acid-sulfonated styrene copolymer, 8 parts of zinc salt, 10 parts of acid, iron 35 parts of salt, 5 parts of cationic starch ether quaternary ammonium salt, 27 parts of water.

[0052] In this embodiment, the preparation method of above-mentioned polyaspartic acid-sulfonated styrene copolymer comprises the following steps:

[0053] 1) Add polyaspartic acid, sulfonated styrene, deionized water and catalyst to the reactor in sequence, heat in a constant temperature water bath, stir to dissolve polyaspartic acid and sulfonated styrene, add hydrogen The pH value of the sodium oxide solution is maintained at 8.5 to obtain a reaction solution;

[0054] 2) Under a nitrogen atmosphere, maintain the temperature at 75°C, add the initiator dropwise to the reaction solution at a constant speed, heat to reflux and stir mecha...

Embodiment 3

[0068] This example discloses a composite defluorination agent, which is prepared from the following components according to mass percentage: 15 parts of polyaspartic acid-sulfonated styrene copolymer, 6 parts of zinc salt, 9 parts of acid, iron 25 parts of salt, 5 parts of cationic starch ether quaternary ammonium salt, 40 parts of water.

[0069] In this embodiment, the preparation method of above-mentioned polyaspartic acid-sulfonated styrene copolymer comprises the following steps:

[0070] 1) Add polyaspartic acid, sulfonated styrene, deionized water and catalyst to the reactor in sequence, heat in a constant temperature water bath, stir to dissolve polyaspartic acid and sulfonated styrene, add hydrogen The pH value of the sodium oxide solution is maintained at 8.5 to obtain a reaction solution;

[0071] 2) Under a nitrogen atmosphere, maintain the temperature at 75°C, add the initiator dropwise to the reaction solution at a constant speed, heat to reflux and stir mechan...

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Abstract

The invention belongs to the technical field of water treatment agents. The invention relates to a composite defluorination agent, which comprises the following raw materials in parts by weight: 10-15 parts of polyaspartic acid-sulfonated styrene copolymer, 5-parts of zinc salt 8 parts, 8‑10 parts of acid, 25‑35 parts of iron salt, 3‑5 parts of cationic starch ether quaternary ammonium salt, 27‑49 parts of water. The invention also discloses a preparation method of the composite type defluorination agent. Compared with the prior art, the present invention has the following advantages: the composite defluorination agent described in the present invention is mainly aimed at the chemical depth defluorination of industrial wastewater such as coal metallurgy coking wastewater, glass manufacturing wastewater, polysilicon, semiconductor wastewater, and pharmaceutical wastewater. The reddish-brown liquid mainly uses the strong coagulation and flocculation function of cationic starch ether quaternary ammonium salt, combined with the adsorption and complexation ability of zinc salt and iron salt to fluoride ion, the fluoride ion in the effluent is controlled below 2mg / L, and the defluoridation effect is good. The aspartic acid copolymer can effectively control the scaling of calcium salts, prolong the cleaning period of the pipeline, and improve the utilization rate of lime.

Description

technical field [0001] The invention belongs to the technical field of water treatment agents, and in particular relates to a composite defluorinating agent and a preparation method thereof. Background technique [0002] At present, the more effective methods for removing fluoride ions in wastewater include ion exchange method, membrane method, adsorption method, and chemical agent method. The ion exchange method is suitable for small water volume and low concentration wastewater, but it has no advantages in terms of treatment cost and operating efficiency when dealing with large water volume and high concentration fluorine-containing wastewater; membrane methods such as nanofiltration, reverse osmosis, electrodialysis, etc. Innovative technology, although the treatment effect is better, but the cost is high, and at the same time requires high operation and management experience, problems may often occur during operation, and the biggest problem is that the concentrated wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F1/52C08F283/04C08F212/14C02F101/14
CPCC02F1/56C02F1/5236C08F283/04C02F2101/14C08F212/30
Inventor 田民格高德超曾俊郏瑞花田沛霖
Owner SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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