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A kind of cationic polyacrylamide and its application

A polyacrylamide, cationic technology, used in flocculation / sedimentation water / sewage treatment and other directions

Active Publication Date: 2021-05-07
江西洪城环境股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the domestic situation, although there are a wide variety of PAM products on the market, most of these products are used in the tertiary mining of oil fields, papermaking and other industries, and there is still a large gap in the practical PAM water purifier for urban sewage purification.

Method used

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  • A kind of cationic polyacrylamide and its application
  • A kind of cationic polyacrylamide and its application
  • A kind of cationic polyacrylamide and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Add 21g of acrylamide, 2.33g of dimethyl diallyl ammonium chloride, 0.1g of urea, and 0.1g of EDTA into a 1L three-necked flask in sequence, and dissolve them in 70mL of deionized water to prepare a salt solution A, which is protected by nitrogen gas. , mechanically stirred at a speed of 300r / min for 30min. Prepare Initiator B containing 0.0053 g ammonium persulfate, 0.0125 g sodium borohydride, 0.0125 g azobisisobutylamidine hydrochloride and 1.5 mL deionized water. The prepared initiator B was added dropwise to the salt solution A with a peristaltic pump, and the dropping time was 30 minutes. After the dropwise addition, the reaction temperature was raised to 50°C, and the reaction was continued for 2-3 hours until the solution became a transparent colloid. The jelly sample was taken out and placed in an evaporating dish and dried at a constant temperature of 75° C. to a constant weight to obtain a cationic polyacrylamide (10-CPAM) with an ionicity of 10 wt.%.

[004...

Embodiment 2

[0046] Add 21g of acrylamide, 5.25g of dimethyl diallyl ammonium chloride, 0.1g of urea, and 0.1g of EDTA into a 1L three-necked flask in sequence, and dissolve them in 70mL of deionized water to prepare a salt solution A, which is protected by nitrogen gas. , mechanically stirred at a speed of 300r / min for 30min. Prepare Initiator B containing 0.0053 g ammonium persulfate, 0.0125 g sodium borohydride, 0.0125 g azobisisobutylamidine hydrochloride and 1.5 mL deionized water. The prepared initiator B was added dropwise to the salt solution A with a peristaltic pump, and the dropping time was 30 minutes. After the dropwise addition, the reaction temperature was raised to 50°C, and the reaction was continued for 2-3 hours until the solution became a transparent colloid. Take out the jelly sample and place it in an evaporating dish and dry it at a constant temperature of 75°C to a constant weight to obtain a cationic polyacrylamide with an ionization of 20wt.%.

Embodiment 3

[0048] Add 21g of acrylamide, 9g of dimethyl diallyl ammonium chloride, 0.1g of urea, and 0.1g of EDTA in sequence in a 1L three-necked flask, and dissolve them in 70mL of deionized water to prepare a salt solution A, which is protected by nitrogen gas. Stir mechanically at a speed of 300r / min for 30min. Prepare Initiator B containing 0.0053 g ammonium persulfate, 0.0125 g sodium borohydride, 0.0125 g azobisisobutylamidine hydrochloride and 1.5 mL deionized water. The prepared initiator B was added dropwise to the salt solution A with a peristaltic pump, and the dropping time was 30 minutes. After the dropwise addition, the reaction temperature was raised to 50°C, and the reaction was continued for 2-3 hours until the solution became a transparent colloid. Take out the jelly sample and place it in an evaporating dish and dry it at a constant temperature of 75°C until it reaches a constant weight to obtain a cationic polyacrylamide with an ion content of 30wt.%.

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Abstract

The invention discloses a cationic polyacrylamide and its application, belonging to the technical field of sewage treatment. The monomer of the cationic polyacrylamide is acrylamide, the ionic monomer is dimethyl diallyl ammonium chloride, and the initiator is Ammonium persulfate, sodium borohydride, azobisisobutylamidine hydrochloride; the ionic monomer is grafted on the carbon chain of polyacrylamide; the ionicity of the cationic polyacrylamide is 10-40wt.%, preferably is 30wt.%; the degree of polymerization of the cationic polyacrylamide is 6-240,000, preferably 200,000; the present invention introduces appropriate water-soluble ionic groups in the process of synthesizing polyacrylamide to regulate its ionicity, and is used in urban Sewage treatment, by screening out the appropriate ionicity and corresponding use process conditions, further optimize the electrostatic adsorption and flocculation of charged groups on such polymers to impurities in water, so that functional integration can achieve efficient sewage purification effects to meet the national standard. Grade A standard.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a cationic polyacrylamide and its application. Background technique [0002] With the modernization of my country's industry and agriculture and the evolution of urbanization, the sewage generated by urban production and life has become more and more complex in composition and discharge volume; at the same time, it corresponds to the requirements of sustainable development and healthy life. , The demand of the whole society for a clean water environment has objectively contributed to the continuous improvement of the national sewage purification treatment standards. At present, the sewage treatment indicators of major cities in China are facing the realistic requirement of upgrading from the current first-class B standard to the first-class A standard, and the current use of simple inorganic flocculation purifiers such as polyaluminum chloride (PAC) for urban sewage purif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F226/02C02F1/56
CPCC02F1/56C08F220/56C08F226/02
Inventor 赵丹魏锋何洪张雨青郑振伟陈超张宁
Owner 江西洪城环境股份有限公司
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