Organic-inorganic ionic hetero high efficiency flocculant

A technology of inorganic ions and flocculants, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of reduced effect and reduced viscosity of composite flocculants, and achieve the effect of floc recovery, high utilization rate of chemicals and fast flocculation speed.

Inactive Publication Date: 2004-12-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Inorganic flocculants have the characteristics of strong charge neutralization ability, fast action, low toxicity, wide source of raw materials, and low cost of use. Compared with inorganic flocculants, organic polymer flocculants have the advantages of less dosage, faster flocculation, Coexistence of salts, little influence of pH value and temperature, less sludge generation, and easy handling. Usually, inorganic flocculants and organic polymer flocculants have to be added step by step to have a better synergistic effect, that is, first The inorganic flocculant exerts electrical neutralization and destroys the stability of the suspended colloidal particles in the wastewater, and then the organic macromolecule further bridges to produce large and solid flocs, and the organic and inorganic flocculants are mechanically mixed to make a composite flocculant. The electrolyte effect of the flocculant leads to the shrinkage of the organic polymer chain in the solution, especially with the extension of storage, the viscosity of the composite flocculant decreases, and the effect is significantly reduced

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0012] Example 1: 52 kg of acrylamide, 24 kg of methacryloyloxyethyltrimethylammonium chloride and 400 kg of 3% aluminum hydroxide colloidal solution were added to a 1000L enamel polymerization kettle at one time, and then 320 kg Deionized water, stirred and fed with nitrogen, heated to 50-60°C, added 4 kg of initiator aqueous solution, stirred evenly, and reacted at constant temperature for 6 hours to obtain an ionic hybrid flocculant with an aluminum hydroxide content of 13.6%. solution.

Embodiment 2

[0013] Example 2: 52 kilograms of acrylamide, 24 kilograms of methacryloyloxyethyltrimethylammonium chloride and 400 kilograms of 1% aluminum hydroxide colloidal solution were added to a 1000L enamel polymerization kettle at one time, and then 320 kilograms were added Deionized water, stirred and fed with nitrogen, heated to 50-60°C, added 4 kg of initiator aqueous solution, stirred evenly, and reacted at constant temperature for 6 hours to obtain an ionic hybrid flocculant with an aluminum hydroxide content of 5% solution.

Embodiment 3

[0014] Example 3: 60 kg of acrylamide, 16 kg of methacryloxyethyltrimethylammonium chloride and 80 kg of 1% aluminum hydroxide colloidal solution were added to a 1000L enamel polymerization kettle at one time, and then 320 kg Deionized water, stirred and fed with nitrogen, heated to 50-60°C, added 4 kg of initiator aqueous solution, stirred evenly, and reacted at constant temperature for 6 hours to obtain an ionic hybrid flocculant with an aluminum hydroxide content of 1%. solution.

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Abstract

The efficient flocculant consists of hydroxide colloid 0.5-15 wt%, acrylamide 50-95 wt% and cationic monomer 0-45 wt%. The hydroxide colloid may be aluminum other, iron hydroxide, magnesium hydroxide or zinc other, and has colloid size of 10-200 nm. The cationic monomer includes DMDAAC or DMC. The organic-inorganic hetero efficient flocculant has in-situ polymerized acrylamide/cationic monomer copolymer linked to the surface of charged inorganic colloid particle, so that it has the synergistic effect of electrically neutralizing effect of inorganic flocculant and the bridging effect of organic polymer and greatly raised flocculating efficiency.

Description

technical field [0001] The invention relates to water treatment chemicals, in particular to an organic-inorganic ion hybrid high-efficiency flocculant. Background technique [0002] Inorganic flocculants have the characteristics of strong charge neutralization ability, fast action, low toxicity, wide source of raw materials, and low cost of use. Compared with inorganic flocculants, organic polymer flocculants have the advantages of less dosage, faster flocculation, Coexistence of salts, little influence of pH value and temperature, less sludge generation, and easy handling. Usually, inorganic flocculants and organic polymer flocculants have to be added step by step to have a better synergistic effect, that is, first The inorganic flocculant exerts electrical neutralization and destroys the stability of the suspended colloidal particles in the wastewater, and then the organic macromolecule further bridges to produce large and solid flocs, and the org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 杨骛远钱锦文沈之荃郑宝庆
Owner ZHEJIANG UNIV
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