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Environment-friendly polyether antisludging agent and preparation method thereof

A scale inhibitor, an environmentally friendly technology, applied in the field of industrial circulating cooling water systems, can solve the problems of poor CaCO3 resistance, increased industrial application costs, difficult to deal with inorganic waste salts, etc., and achieves good biodegradation performance and low production cost. , highly effective inhibitory effect

Inactive Publication Date: 2012-06-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2003, Betz developed the trimer of APES, aiming to further optimize product performance and reduce production costs, but the disadvantage of this type of scale inhibitor is the inhibition of CaCO 3 The performance is not good, and its structure still contains nutrients such as nitrogen, and long-term large-dose use will still cause eutrophication of water bodies
Chinese patent CN101172720 discloses a phosphorus-free allyloxy polyether carboxylic acid scale inhibitor and its preparation method, but a large amount of difficult-to-handle inorganic waste salts will be produced during the preparation process of the scale inhibitor, causing secondary pollution and Increase the cost of its industrial application

Method used

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  • Environment-friendly polyether antisludging agent and preparation method thereof
  • Environment-friendly polyether antisludging agent and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0022] Example 1: at N 2 Add 100g of allyl polyethylene glycol monoether to the protected reactor, add 80g of γ-butyrolactone and react at 80°C for 2 hours to obtain a polyether carboxylic acid reaction monomer, add 80g of acrylic acid and 100g of hydroxyethyl acrylate at 80°C ester, then add 300g of water, mix well and dropwise add 12g of sodium persulfate (dissolved in 50g of water), dropwise

[0023] After completion, the reaction was continued at 80°C for 3 hours, and after cooling down to room temperature, an environmentally friendly polyether scale inhibitor (APEQ) was prepared. Gained APEQ antiscalant is when dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 99.68%, for CaCO 3 The scale inhibition rate is 93.87%.

example 2

[0024] Example 2: at N 2 Add 100g of allyl polyethylene glycol monoether and 80g of γ-nonanolide to the protected reactor for 3 hours at 60°C to obtain a polyether carboxylic acid reaction monomer, add 60g of acrylic acid and 120g of methacrylic acid at 60°C Hydroxypropyl ester, then add 250g of water, mix well and dropwise add 10g of potassium persulfate (dissolved in 50g of water), after the dropwise addition, raise the temperature to 85°C, continue the reaction for 5h, and after cooling down to room temperature, an environmentally friendly Type polyether antiscalant (APEQ).

[0025] Gained APEQ antiscalant is when dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 99.52%, for CaCO 3 The scale inhibition rate is 94.75%.

example 3

[0026] Example 3: at N 2 Add 120g of allyl polyethylene glycol monoether and 60g of ε-caprolactone to the protected reaction kettle and react at 100°C for 5 hours to obtain a polyether carboxylic acid reaction monomer. After the temperature drops to 75°C, add 100g of maleic acid and 120g of dihydroxypropyl fumarate, then add 300g of water, mix well and dropwise add 15g of sodium persulfate (dissolved in 60g of water), after the dropwise addition, the temperature is raised to 90°C, continue the reaction for 2h, and drop to After room temperature, the environment-friendly polyether scale inhibitor (APEQ) was prepared.

[0027] Gained APEQ antiscalant is when dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 96.54%, for CaCO 3 The scale inhibition rate is 91.17%.

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Abstract

The invention relates to an environment-friendly polyether antisludging agent. A polyether carboxylic reaction monomer, a vinyl-containing unsaturated double-bond carboxylic monomer and a vinyl-containing unsaturated double-bond carboxylic ester monomer are subjected to radical copolymerization, thereby obtaining the environment-friendly polyether antisludging agent. The structure formula is as follows, wherein A is a repeated structure unit after the vinyl-containing unsaturated double-bond carboxylic monomer is subjected to the radical copolymerization; B is the repeated structure unit after the vinyl-containing unsaturated double-bond carboxylic ester monomer is subjected to the radical copolymerization; R is H or C1-C5 low-carbon alkyl; n value is 2-10; the degree of polymerization x is 2-5000; the degree of polymerization y is 2-5000; the degree of polymerization z is 2-5000; and the repeated structure unit m is 1-100.

Description

technical field [0001] The invention relates to a phosphorus-free, nitrogen-free and biodegradable environment-friendly polyether scale inhibitor (APEQ) and a preparation method thereof, which belongs to the category of scale inhibitor preparation and application and is suitable for industrial circulating cooling water systems. Background technique [0002] With the increasing attention of human beings to the living environment and the increasingly stringent environmental protection regulations, people pay more and more attention to green water treatment agents. However, the widespread use of a large number of phosphorus and nitrogen-containing scale inhibitors has caused a large number of bacteria Breeding, eutrophication of water bodies and other environmental pollution problems, therefore, it is imperative to develop green water treatment agents without phosphorus and nitrogen. [0003] At present, the research on scale inhibitors at home and abroad mainly focuses on orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/06C08F220/28C08F222/02C08F222/20C08F222/14C02F5/10
Inventor 周钰明刘广卿黄镜怡姚淸照张培新凌磊钟小丰符嫦娥吴文导孙伟
Owner SOUTHEAST UNIV
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