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Environment-friendly polyethyleneglycol multifunctional water treatment agent and preparation method thereof

A technology of polyethylene glycols and water treatment agents, which is applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc. It can solve the problem of poor stabilization of zinc hydroxide and disperse hydrogen oxidation Poor iron capacity, poor calcium sulfate scale resistance and other problems, to achieve good biodegradability, high-efficiency inhibition, simple and convenient operation

Inactive Publication Date: 2012-11-21
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are more studies on non-phosphorus carboxylic acid water treatment agents, such as hydrolyzed polycalcium maleate (HPMA), polyacrylic acid (PAA), polyepoxysuccinic acid (PESA), maleic anhydride-acrylic acid copolymer (BC -283) and acrylic acid-acrylic copolymer (T-225), etc., US patents 5062962 and 5147555 show that PESA has the effect on CaCO 3 and CaSO 4 It has good scale inhibition effect, but the effect of calcium phosphate inhibition is poor, and the ability to disperse iron hydroxide is poor, and the stabilization effect on zinc hydroxide is not good. In addition, the corrosion inhibition performance of this kind of water treatment agent is average
American Betz Company launched a new generation of sulfonate copolymer AA-APES (acrylic acid allyloxypolyethoxysulfate copolymer) in 2003, blocking Ca 3 (PO 4 ) 2 The efficiency of AA-APES is significantly improved, and AA-APES has a higher tolerance to water hardness, suspended solids, and temperature. It is the latest generation of Ca 3 (PO 4 ) 2 Phosphorus-free water treatment agent for scale, but APES still contains nitrogen elements that cause eutrophication of water sources and the effect of inhibiting calcium sulfate scale is poor

Method used

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  • Environment-friendly polyethyleneglycol multifunctional water treatment agent and preparation method thereof
  • Environment-friendly polyethyleneglycol multifunctional water treatment agent and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0017] Example 1: at N 2 Add 100g of polyethylene glycol into the protected reactor, add 120g of maleic anhydride and react at 65°C for 4 hours to obtain the reaction monomer of polyethylene glycol carboxylic acid; after adjusting the temperature to 70°C, add 50g of itaconic acid, over Potassium sulfate (5g), sodium persulfate (5g) and potassium metabisulfinate (5g) mixture, 360g water, after completion, continue to react at 70°C for 4h, after cooling down to room temperature, green and environment-friendly polyethylene glycol is prepared Class multifunctional water treatment agent (PEGY).

[0018] Gained PEGY water treatment agent is when dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate up to 99.5%, for CaCO 3 Scale inhibition rate is 92.1%, for CaSO 4 The scale inhibition rate is 96.4%. , The light transmittance of Fe(III) solution, which characterizes the performance of dispersing iron, is 15.9%, and the corrosion inhibition rate of carbon steel can reach 92.7...

example 2

[0019] Example 2: at N 2 Add 100g of polyethylene glycol into the protected reactor, add 50g of maleic anhydride and react at 60°C for 1.5h to obtain polyethylene glycol carboxylic acid reaction monomer; after adjusting the temperature to 70°C, add 80g of acrylic acid, 13g of Sodium sulfate, 700g water, after completion, the temperature was raised to 80°C to continue the reaction for 2.5h, and after cooling down to room temperature, a green and environment-friendly polyethylene glycol multifunctional water treatment agent (PEGY) was prepared.

[0020] When the dosage of the obtained PEGY water treatment agent is 8mg / L, the Ca 3 (PO 4 ) 2 Scale inhibition rate up to 99.1%, for CaCO 3 Scale inhibition rate is 93.3%, for CaSO 4 The scale inhibition rate is 94.9%, the light transmittance of the solution containing Fe(III) which characterizes the performance of dispersing iron is 16.3%, and the corrosion inhibition rate of carbon steel can reach 93.8%.

example 3

[0021] Example 3: at N 2 Add 150g of polyethylene glycol into the protected reactor, add 360g of maleic anhydride and react at 100°C for 2.5h to obtain polyethylene glycol carboxylic acid reaction monomer; after adjusting the temperature to 80°C, add 120g of hydroxypropyl acrylate, 15g of sodium persulfate and 880g of water, after completion, continue to react at 80°C for 6h, and after cooling down to room temperature, a green and environment-friendly polyethylene glycol multifunctional water treatment agent (PEGY) is prepared.

[0022] Gained PEGY water treatment agent is when dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 98.7%, for CaCO 3 Scale inhibition rate is 89.5%, for CaSO 4 The scale inhibition rate is 93.5%, the light transmittance of the Fe(III) solution which characterizes the performance of dispersing iron is 15.9%, and the corrosion inhibition rate for carbon steel can reach 89.6%.

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Abstract

An environment-friendly polyethyleneglycol multifunctional water treatment agent (namely PEGY) is prepared through free radical copolymerization of polyethyleneglycol carboxylic acid reaction monomers and monomers containing vinyl unsaturated double bonds. The structural formula of the environment-friendly polyethyleneglycol multifunctional water treatment agent figured as follows, wherein A represents a constitutional repeating unit formed after the polymerization of the monomers containing the vinyl unsaturated double bonds, the polymerization degree x is 1-5,000, the polymerization degree y is 1-5,000, the polymerization degree z is 1-5,000, the polymerization degree z is 1-5,000, and the number m of repeating units is 3-1000.

Description

technical field [0001] The invention relates to a green and environment-friendly polyethylene glycol multifunctional water treatment agent (PEGY) and a preparation method thereof, which is a phosphorus-free, nitrogen-free, biodegradable and environmentally friendly poly The functional water treatment agent is used for the dispersed treatment of corrosion and scale inhibition of water quality, and belongs to the preparation and application technology of the water treatment agent in the technical field of water treatment. Background technique [0002] Due to the extensive use of phosphorus-containing water treatment chemicals, it has caused a large number of bacteria and algae to multiply, form red tides, and cause water pollution. The use of water treatment chemicals has attracted more and more attention. [0003] At present, there are more studies on non-phosphorus carboxylic acid water treatment agents, such as hydrolyzed polycalcium maleate (HPMA), polyacrylic acid (PAA),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C08F290/06
Inventor 周钰明刘广卿黄镜怡姚清照凌磊王虎传曹科刘亚辉吴文导孙伟
Owner SOUTHEAST UNIV
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