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Polyether carboxylic ester corrosion and scale inhibitor marked by fluorescence and preparation method thereof

A polyether carboxylate, corrosion and scale inhibitor technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. Disperse iron, automatic drug delivery and other problems, achieve the effects of good biodegradation performance, low production cost, simple and convenient operation

Inactive Publication Date: 2012-12-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the molecular structure of polyepoxysuccinic acid is mainly carboxyl functional groups, a single functional group limits its ability to disperse iron; in addition, a major disadvantage of non-phosphorus water treatment agents is that it does not contain phosphorus in its structure, so it cannot use commonly used molybdenum. ammonium acid spectrophotometric detection, so that the concentration of water treatment chemicals cannot be detected online and automatically administered

Method used

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  • Polyether carboxylic ester corrosion and scale inhibitor marked by fluorescence and preparation method thereof
  • Polyether carboxylic ester corrosion and scale inhibitor marked by fluorescence and preparation method thereof

Examples

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Effect test

example 1

[0018] Example 1: at N 2 Add 100g of allyl polyethylene glycol monoether to the protected reactor, add 120g of succinic anhydride and react at 70°C for 2.5h, adjust the reaction temperature to 85°C, then add 80g of maleic anhydride, 0.5g of 8-allyl Oxy-1,3,6-sodium pyrenetrisulfonate, 100g water, mix well, add 12g sodium persulfate (dissolved in 50g water) dropwise, after the dropwise addition, continue to react at 80°C for 3h, then cool down to room temperature Finally, the green and environment-friendly polyether carboxylate corrosion and scale inhibitor (APELYG) with fluorescent label was prepared.

[0019] When the dosage of the obtained APELYG is 8mg / L, the effect on Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 99.8%, for CaCO 3 Scale inhibition rate is 92.1%, for CaSO 4 The scale inhibition rate is 97.3%, and the corrosion inhibition rate for carbon steel (in accordance with HG / T 3523) can reach 93.7%.

example 2

[0020] Example 2: at N 2 Add 100g of allyl polyethylene glycol monoether and 60g of succinic anhydride to the protected reactor and react at 60°C for 3 hours. After adjusting the reaction temperature to 75°C, add 80g of acrylic acid, 5g of 8-allyloxy- 1,3,6-Sodium pyrenetrisulfonate, 35g of water, mix well, add 10g of potassium persulfate (dissolved in 100g of water) dropwise, after the dropwise addition, raise the temperature to 90°C, continue the reaction for 5h, and cool down to room temperature Finally, the green and environment-friendly polyether carboxylate corrosion and scale inhibitor (APELYG) with fluorescent label was prepared.

[0021] When the obtained APELYG dosage is 8mg / L, the Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 99.3%, for CaCO 3 Scale inhibition rate is 89.6%, for CaSO 4 The scale inhibition rate is 94.2%. , the corrosion inhibition rate of carbon steel (according to the regulations of HG / T 3523) can reach 91.1%.

example 3

[0022] Example 3: at N 2 Add 120g of allyl polyethylene glycol monoether and 240g of succinic anhydride to the protected reactor and react at 100°C for 2 hours. After adjusting the reaction temperature to 80°C, add 50g of acrylic acid, 50g of hydroxyethyl acrylate, 15g of 8- Allyloxy-1,3,6-pyrene trisulfonate sodium, 280g water, mix well, add dropwise 10g potassium persulfate (5g) and potassium persulfonate (5g) mixture (dissolved in 60g water), add dropwise After the completion, the temperature was raised to 95°C, and the reaction was continued for 2 hours. After cooling down to room temperature, a green and environmentally friendly polyether carboxylate corrosion and scale inhibitor (APELYG) with fluorescent labels was prepared.

[0023] When the obtained APELYG dosage is 8mg / L, the Ca 3 (PO 4 ) 2 Scale inhibition rate up to 97.9%, for CaCO 3 Scale inhibition rate is 89.6%, for CaSO 4 The scale inhibition rate is 92.5%, and the corrosion inhibition rate for carbon steel...

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Abstract

A polyether carboxylic ester corrosion and scale inhibitor marked by fluorescence is prepared by conducting radical copolymerization on a polyether carboxylic ester reaction monomer, a monomer containing vinyl unsaturated double bonds and a fluorescence monomer containing unsaturated double bonds. A structural general formula of the polyether carboxylic ester corrosion and scale inhibitor marked by fluorescence is shown in the specification, wherein A is of a repeating structure unit after the polymerization of the monomer containing the vinyl unsaturated double bonds, B is of a repeating structure unit of the polymerization of the fluorescence monomer containing the unsaturated double bonds, and R is H or C1-C5 low-carbon alkyl; and the polymerization degree x is 1-5000, the polymerization degree y is 1-5000, the polymerization degree z is 1-5000, and the repeated unit number m is 1-100.

Description

technical field [0001] The invention relates to a fluorescently labeled polyether carboxylate corrosion and scale inhibitor (APELYG) and a preparation method thereof, which is a phosphorus-free, nitrogen-free, biodegradable multifunctional water treatment system suitable for industrial circulating cooling water systems The invention is used for corrosion and scale inhibition treatment of water quality, and belongs to the preparation and application technology of corrosion and scale inhibitors in the technical field of water treatment. Background technique [0002] The circulating cooling water system contains a large amount of alkaline earth metal cations such as Ca 2+ , Mg 2+ 、Ba 2+ , Fe 2+ , Fe 3+ 、Al 3+ , Zn 2+ etc., will react with SO in water 4 2- , CO 3- 、HCO 3- , OH - 、PO 4 2- , SiO 3 2- and other anions to form insoluble inorganic salts such as Ca 3 (PO 4 ) 2 , CaCO 3 , CaSO 4 , MgCO 3 , Mg(OH) 2 , Scale is deposited on the surface of pipes and ...

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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