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Cation nucleating agent and preparation method thereof

A technology of cation and nucleating agent, which is used in dewatering/drying/concentrating sludge treatment, etc., can solve the problem that the nucleating agent has no charge and cannot neutralize large negative ion groups.

Inactive Publication Date: 2008-12-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the nucleating agent in the existing sewage treatment process is not charged and cannot neutralize the large negative ion group in the sludge, and provides a cationic nucleating agent and its preparation method

Method used

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specific Embodiment approach 1

[0012] Specific embodiment one: In this embodiment, the cationic nucleating agent consists of propylene monomer, quaternary ammonium salt type cationic starch, disodium EDTA, propylene glycol-1.2, K 2 S 2 o 8 , Mannich reagent and dimethyl sulfate, wherein the molar ratio of acrylic monomer to quaternary ammonium cationic starch is 1:0.05-0.5, and the molar ratio of acrylic monomer to disodium EDTA is 1:0.002-0.05 , The molar ratio of EDTA disodium to propylene glycol-1.2 is 1:0.08~1.22, EDTA disodium and K 2 S 2 o 8 The molar ratio of Mannich reagent and propenyl monomer is 1: 1.05~1.55, the molar ratio of Mannich reagent and propylene monomer is 1: 0.15~0.35, and the molar ratio of Mannich reagent and dimethyl sulfate is 1: 1.05~1.20, and described propenyl monomer Body is acrylamide, sodium acrylate or acrylonitrile; Described Mannich reagent is that mass concentration is that 30% dimethylamine aqueous solution is dripped in the mass concentration of equimolar ratio und...

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the molar ratio of propylene-based monomer and quaternary ammonium salt type cationic starch in the cationic nucleating agent is 1: 0.06~0.1, and the molar ratio of propylene-based monomer and EDTA disodium The molar ratio of EDTA disodium and propylene glycol-1.2 is 1:0.09~1.1, the molar ratio of EDTA disodium and K 2 S 2 o 8 The molar ratio of Mannich reagent to propylene monomer is 1: 0.16 to 0.20, the molar ratio of Mannich reagent to dimethyl sulfate is 1: 1.06 to 1.10. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the molar ratio of propylene-based monomer and quaternary ammonium salt type cationic starch in the cationic nucleating agent is 1: 0.11~0.25, and the molar ratio of propylene-based monomer and EDTA disodium The molar ratio of EDTA disodium to propylene glycol-1.2 is 1: 1.12 to 1.21, and the molar ratio of EDTA disodium to K 2 S 2 o 8 The molar ratio of Mannich reagent to propylene monomer is 1: 1.16-1.25, the molar ratio of Mannich reagent to propylene monomer is 1: 0.21-0.34, and the molar ratio of Mannich reagent to dimethyl sulfate is 1: 1.11-1.19. Others are the same as in the first embodiment.

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Abstract

The invention provides a cationic nucleating agent and a preparation method thereof, relating to a nucleating agent. The invention solves the problem that: in the prior sewage water treatment process, the nucleating agent without electric property can not neutralize macroanionic clusters in mud. The cation nucleating agent is prepared by propenyl monomers, quaternary cationic starch, EDTA disodium, propanediol-1.2, K2S2O8, Mannich reagent and dimethyl sulfate. The method comprises the following steps of: adding the propenyl monomers, an EDTA disodium aqueous solution, the propanediol-1.2 and the K2S2O8 into an aged solution to produce a grafted product; adding the Mannich reagent into the grafted product to produce Mannich alkali; and adding the dimethyl sulfate into the produced Mannich alkali to stir, thereby obtaining the cationic nucleating agent. The cationic nucleating agent in the invention with a positive charge can adsorb the macroanionic clusters in the mud, thereby forming a gel nucleus with a volume larger than that of the prior nucleating agent.

Description

technical field [0001] The present invention relates to a nucleating agent. Background technique [0002] In addition to solid particles such as a large amount of sediment and organic residues, domestic sewage sludge also contains residual organic soluble substances such as fruit juices and vegetable juices, liquid insoluble substances such as vegetable oils and animal fats, and their saponified or partially saponified substances. Alkaline soap, neutral detergent, non-ionic detergent and other surface active substances. After various physical or chemical changes such as mechanical degradation, physical capture, chemical adsorption, and activated sludge conversion, the above substances form stable colloidal particles, which are not easy to precipitate and separate out. Colloidal particles pass through again -COO - , -OH - Such groups adsorb a large amount of sediment or solid insoluble impurities to form a large negative ion group. At the same time, surface-active substan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 祁佩时綦峥
Owner HARBIN INST OF TECH
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