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Phosphorus-free environment-friendly polyether multifunctional water treatment agent and preparation method thereof

A water treatment agent, an environmentally friendly technology, applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc., can solve environmental pollution such as poor ability, eutrophication of bacteria and algae secondary pollution and other problems, to achieve the effect of green and environmentally friendly preparation process, good biodegradation performance, and good corrosion inhibition performance

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, a class of water treatment agents that have been studied more and have better anti-scaling effects are mostly phosphates, such as hydroxyethylidene diphosphonic acid (HEDP), polyol phosphate (PAPE), aminotrimethylene phosphonic acid (ATMP) ), 2-hydroxyphosphorylacetic acid (HPAA), 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC), ethylenediaminetetramethylenephosphonic acid (EDTMP), and polyaminopolyether tetra Methylene phosphoric acid (PAPEMP), etc., such water treatment agents are used in large quantities and widely, which have caused environmental pollution problems such as the proliferation of bacteria and algae, eutrophication of water bodies, etc. Therefore, the development of phosphorus-free water treatment agents is the 21st century. general trend
[0004] The phosphorus-free water treatment agents that are more researched now are 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 acid ester copolymer (T-225), etc., such water treatment agents are effective against CaCO 3 and CaSO 4 It has good scale inhibition effect, but the effect of calcium phosphate inhibition is very poor, and the ability to disperse iron hydroxide and stabilize zinc hydroxide is poor. In addition, the corrosion inhibition performance of this kind of water treatment agent is not good
Chinese patent CN101003410A discloses a phosphorus-free allyloxy polyether scale inhibitor and its preparation method. However, a large amount of difficult-to-handle inorganic waste salt will be produced during the preparation process of the scale inhibitor, which will easily cause secondary pollution and increase its Industrial application cost

Method used

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  • Phosphorus-free environment-friendly polyether multifunctional water treatment agent and preparation method thereof
  • Phosphorus-free environment-friendly polyether multifunctional water treatment agent and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0018] Example 1: at N 2 Add 100g polyethylene glycol diallyl ether to the protected reactor, adjust the temperature to 70°C, add 15g itaconic acid, potassium persulfate (1g), sodium persulfate (1g) and potassium metabisulfinate (1g) the mixture, 160g water, after completion, continue to react at 70°C for 5.5h, and after cooling down to room temperature, a phosphorus-free environmentally friendly polyether multifunctional water treatment agent (PEGDE) is prepared.

[0019] Gained PEGDE water treatment agent is when dosage is 8mgL, to Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 99.8%, for CaCO 3 Scale inhibition rate is 92.3%, for CaSO 4 The scale inhibition rate is 95.6%. , The light transmittance of Fe(III) solution, which characterizes the performance of dispersing iron, is 15.5%, and the corrosion inhibition rate of carbon steel can reach 92.7%.

example 2

[0020] Example 2: at N 2 Add 100g of polyethylene glycol divinyl ether into the protected reaction kettle, adjust the temperature to 70°C, add 180g of acrylic acid, 3g of sodium persulfate, and 320g of water, and then raise the temperature to 80°C to continue the reaction for 3 hours, and then cool down to room temperature , prepared a phosphorus-free environmental protection polyether multifunctional water treatment agent (PEGDE).

[0021] The PEGDE water treatment agent of gained is when dosage is 8mgL, to Ca 3 (PO 4 ) 2 Scale inhibition rate up to 99.4%, for CaCO 3 Scale inhibition rate is 91.5%, for CaSO 4 The scale inhibition rate is 93.9%, the light transmittance of the Fe(III) solution that characterizes the performance of dispersing iron is 16.3%, and the corrosion inhibition rate for carbon steel can reach 94.8%.

example 3

[0022] Example 3: at N 2 Add 150g of polyethylene glycol diallyl ether to the protected reactor, adjust the temperature to 80°C, add 120g of hydroxypropyl acrylate, 16g of sodium persulfate, and 850g of water, and continue the reaction at 80°C for 6.5 hours , after cooling down to room temperature, a phosphorus-free environmentally friendly polyether multifunctional water treatment agent (PEGDE) was prepared.

[0023] Gained PEGDE water treatment agent is when dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 98.3%, for CaCO 3 Scale inhibition rate is 90.7%, for CaSO 4 The scale inhibition rate is 92.5%, the light transmittance of the solution containing Fe(III) which characterizes the performance of dispersing iron is 17.6%, and the corrosion inhibition rate for carbon steel can reach 91.7%.

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Abstract

Polyethylene glycol diene ether and monomer containing vinyl unsaturated double bonds undergo radical copolymerization, so that a phosphorus-free environment-friendly polyether multifunctional water treatment agent (PEGDE) is obtained. In the general structural formula of the phosphorus-free environment-friendly polyether multifunctional water treatment agent, A is the constitutional repeating unit of the polymerized monomer containing vinyl unsaturated double bonds, G is -CH2-O- or -O-, the degree of polymerization x is 1 to 5000, the degree of polymerization y is 1 to 5000, the degree of polymerization z is 1 to 5000, the degree of polymerization p is 1 to 5000, and the repeating unit m is 3 to 1000.

Description

technical field [0001] The present invention relates to a phosphorus-free and environment-friendly polyether multifunctional water treatment agent (PEGDE) and a preparation method thereof, which is a phosphorus-free and biodegradable environment-friendly multifunctional water treatment agent suitable for industrial circulating cooling water systems. The invention relates to the dispersion treatment of corrosion and scale inhibition for water quality, and belongs to the preparation and application technology of water treatment agent in the technical field of water treatment. Background technique [0002] The use of circulating cooling water is a common way to save industrial water, but inorganic metal ions such as calcium and magnesium ions in the water after repeated use of cooling water are very easy to form inorganic scales such as insoluble salts such as calcium phosphate, calcium carbonate, and magnesium carbonate. The deposition of scale on the surface of heat exchanger...

Claims

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Application Information

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IPC IPC(8): C02F5/10C08F283/06
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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