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Preparation method and application of composite flocculant

A composite flocculant and organic flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, mining wastewater treatment, etc., can solve problems such as poor oil removal effect, improve flocculation performance and increase positive charge Density, the effect of improving the adsorption capacity

Active Publication Date: 2021-04-30
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention discloses a preparation method and application of a composite flocculant to solve the technical problem in the prior art that the flocculant has poor oil removal effect on highly turbid oily mine water

Method used

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  • Preparation method and application of composite flocculant
  • Preparation method and application of composite flocculant
  • Preparation method and application of composite flocculant

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Embodiment approach

[0033] According to one embodiment of the present invention, a kind of preparation method of composite flocculant is provided, comprising:

[0034] Polymerized ferric sulfate and organic flocculant are homogeneously compounded to obtain a composite flocculant; among them, polyferric sulfate is obtained by hydrothermal synthesis of ferrous sulfate, and the organic flocculant is made of acrylamide, dimethyl diallyl chloride A polymer formed by the polymerization of ammonium chloride and stearyl methacrylate.

[0035] Further, the preparation method of polymerized ferric sulfate comprises: adding an oxidizing agent to an acidic solution containing ferrous sulfate for oxidation reaction, then adding a strong base to adjust the pH of the reaction system to 6.8-7.2, then performing a stirring reaction, and then transferring the reaction solution to Carry out hydrothermal reaction in a hydrothermal reactor to obtain polyferric sulfate.

[0036] Further, the preparation method of the...

Embodiment 1

[0043] 1) Preparation of Nano Polymerized Ferric Sulfate (PFS):

[0044] First weigh 27.8 grams of FeSO 4 ·7H 2 O solid particles and dissolved in 300mL of glycerol solution with a mass fraction of 50% (glycerol and water are mixed at a ratio of 1:1), and acidified by adding 10-12mL of concentrated sulfuric acid to control Fe 2+ : SO 4 2- The molar ratio is 1.1 to 1.2, so that the pH value of the solution reaches 1.5, and then the mass fraction is 30% H 2 o 2 , the dosage is 51mL (adding excess H 2 o 2 , to ensure that Fe in solution 2+ is completely oxidized), adding H 2 o 2 Afterwards, the solution was rapidly oxidized to reddish-brown, and then continued to slowly add 0.1mol / L sodium hydroxide solution dropwise under stirring conditions to adjust the pH value of the solution to 7.0, and continued to stir and react in a magnetic stirrer at a constant temperature of 60°C for 120 minutes. , put the reaction solution into a hydrothermal reaction kettle, and conduct a ...

Embodiment 2

[0050] 1) Preparation of Nano Polymerized Ferric Sulfate (PFS):

[0051] First weigh 27.8 grams of FeSO 4 ·7H 2 O solid particles and dissolved in 300mL of glycerol solution with a mass fraction of 50% (glycerol and water are mixed at a ratio of 1:1), and acidified by adding 10-12mL of concentrated sulfuric acid to control Fe 2+ : SO 4 2- The molar ratio is 1.1 to 1.2, so that the pH value of the solution reaches 1.3, and then 30% H by mass fraction is added dropwise in a water bath at a constant temperature of 50°C 2 o 2 , the dosage is 51mL (adding excess H 2 o 2 , to ensure that Fe in solution 2+ is completely oxidized), adding H 2 o 2 Afterwards, the solution was rapidly oxidized to reddish-brown, and then continued to slowly add 0.1mol / L sodium hydroxide solution dropwise under stirring conditions, adjusting the pH value of the solution to 6.8, and continued to stir and react in a magnetic stirrer at a constant temperature of 55°C for 130 minutes. , put the reac...

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Abstract

The invention discloses a preparation method of a composite flocculant, which comprises the following steps: carrying out homogeneous compounding on polyferric sulfate and an organic flocculant to obtain the composite flocculant, wherein the polymeric ferric sulfate is prepared from ferrous sulfate through hydrothermal synthesis, and the organic flocculant is a polymer formed by polymerizing acrylamide, dimethyl diallyl ammonium chloride and octadecyl methacrylate. The composite flocculant prepared according to the preparation method of the composite flocculant provided by the invention has good turbidity reduction and oil removal effects in pretreatment of high-turbidity oil-containing mine water, destabilization and coagulation of suspended particles and emulsified oil drops in the high-turbidity oil-containing mine water can be realized, and recycling of the high-turbidity mine water is promoted.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a preparation method and application of a composite flocculant. Background technique [0002] In the process of coal mining and production, there is a huge demand for water, and underground water inrush events often occur during deep well excavation, resulting in a large amount of mine wastewater. According to relevant statistics, the annual discharge of mine water in my country is about 7.17 billion m 3 In recent years, with the improvement of water treatment technology and the increasingly stringent requirements for mine water treatment, the treatment and reuse of mine water has become a necessary way for green coal mining. The most common treatment process for highly turbid mine water in China consists of coagulation, sedimentation, filtration and disinfection, with coagulation being the most important. [0003] With the promotion of mechanized and intensive engineeri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F1/28C02F103/10
CPCC02F1/5236C02F1/56C02F1/285C02F2103/10
Inventor 张春晖赵桂峰全炳旭焦亚楠唐元晖杨博孙超何绪文王文倩霍倩倩王新玲
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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