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Amphoteric or cationic polymeric flocculating agent

A polymer flocculant, cationic technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of high phase transformation ability, strong adsorption capacity and high reactivity

Inactive Publication Date: 2011-04-06
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Morpholine alkyl acrylate monomer or morpholine alkyl methacrylate monomer is a potential cationic monomer, and its synthesis method and polymerization reaction have been reported in the literature [C.E.Rehberg, W.A.Faucette; J .Am.Chem.Soc.; 1949; 71(9); 3164~3165.], but it has not been reported that it is clearly used to prepare amphoteric and cationic polymer flocculants

Method used

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  • Amphoteric or cationic polymeric flocculating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 23.75g of deionized water, 1.1875g of acrylamide, 0.0375g of morpholine ethyl acrylate hydrochloride and 0.025g of acrylic acid into a stoppered graduated test tube with a capacity of 25ml, dissolve and mix well. Use 1 mol / L NaOH solution and 1 mol / L hydrochloric acid to adjust the pH value of the aqueous solution of the polymerization reaction system to 2, cool in an ice-water bath, and pass nitrogen gas for 15 minutes to remove oxygen. Join 1.875×10 -4 g of potassium persulfate and 0.855×10 -4Oxidation-reduction initiator system composed of sodium sulfite of g, stop the nitrogen gas flow and plug the test tube tightly to prevent air from entering, polymerize for 6 hours at 20°C, and obtain a translucent colloid, which is an amphoteric polymer with high-efficiency phase transition ability. The colloid of the flocculant; the powder of the amphoteric polymer flocculant is obtained after the colloid is granulated, dried, crushed, and sieved. It has high phase transit...

Embodiment 2

[0028] Add 22.5g deionized water, 2.125g acrylamide, 0.225g morpholine ethyl acrylate methyl quaternary ammonium salt and 0.025g acrylic acid into a stoppered graduated test tube with a capacity of 25ml, dissolve and mix well. Use 1 mol / L NaOH solution and 1 mol / L hydrochloric acid to adjust the pH value of the aqueous solution of the polymerization reaction system to 7.4, cool in an ice-water bath, and pass nitrogen gas for 20 minutes to remove oxygen. Join 0.208×10 -4 g of ammonium persulfate and 0.095×10 -4 Oxidation-reduction initiator system composed of sodium sulfite of g, stop the nitrogen flow and plug the test tube stopper tightly to prevent air from entering, and react at 25°C for 6 hours to obtain a translucent colloid, which is an amphoteric polymer flocculation with high-efficiency phase transition ability. The colloid of the agent; the colloid is granulated, dried, crushed and sieved to obtain the powder of the amphoteric polymer flocculant, which has high phase...

Embodiment 3

[0030] Add 20g of deionized water, 2.5g of methacrylamide, 2.25g of morpholine ethyl acrylate hydrochloride and 0.25g of 2-acrylamido-2-methylpropanesulfonic acid into a stoppered graduated test tube with a capacity of 25ml, Dissolve and mix well. Use 1 mol / L NaOH solution and 1 mol / L hydrochloric acid to adjust the pH value of the aqueous solution of the polymerization reaction system to 7.0, cool in an ice-water bath, and pass nitrogen gas for 25 minutes to remove oxygen. Add 0.832×10 -4 g potassium persulfate and 0.18×10 -4 For an oxidation-reduction initiator system composed of sodium sulfite, stop the nitrogen flow and plug the test tube tightly to prevent air from entering, and react at 5°C for 12 hours to obtain a translucent colloid, which is an amphoteric polymer flocculant with high-efficiency phase transition ability. The colloid; the colloid is granulated, dried, pulverized, and sieved to obtain the powder of the amphoteric polymer flocculant, which has high phas...

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Abstract

The invention belongs to the field of environment-friendly materials, relates to an amphoteric or cationic polymeric flocculating agent having efficient phase variation capacity, in particular to a polymeric flocculating agent containing acrylic morpholine alkyl esters or methacrylic morpholine alkyl esters. The flocculating agent is prepared by adopting aqueous solution polymerization, and comprises the following steps: preparing solution by using a certain amount of neutral monomer, cationic monomer (acrylic morpholine alkyl ester monomer or methacrylic morpholine alkyl ester monomer) and anionic monomer, adjusting the pH value of the solution, introducing inert gases into the solution to remove oxygen, then adding other agents such as initiating agent and the like into the solution, stopping introducing the inert gases into the solution and keeping a reaction closed, and adjusting the reaction temperature at the temperature of between 0 and 60 DEG C to carry out polymerization so as to obtain the amphoteric or cationic polymeric flocculating agent.

Description

technical field [0001] The invention belongs to the field of environmental protection materials, and relates to a class of amphoteric or cationic polymer flocculants with high-efficiency phase transition capabilities, in particular to high-molecular flocculants containing morpholine alkyl acrylates or morpholine alkyl methacrylates. Molecular flocculants. Background technique [0002] Amphoteric and cationic polymer flocculants are a kind of polymer polyelectrolyte, which can neutralize and bridge the negatively charged colloidal particles in water, destabilize and flocculate the particles in the system, thus facilitating the settlement of particles and filter dehydration. It is widely used in filter aid, retention aid and enhancement in paper industry, sludge dehydration in urban sewage treatment process, wastewater flocculation in textile printing and dyeing, leather processing, aquatic product processing, food processing and other fields. In the 1960s and 1970s, Merck a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/54C08F220/36C08F220/06C08F220/70C02F1/56
Inventor 吴飞鹏许川张玉玺
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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