Non-phosphorus corrosion and scale inhibitor for low-hardness water system industrial recycling cooling water

A technology of phosphorus-free corrosion and scale inhibitor, which is applied in the formulation of phosphorus-free corrosion and scale inhibitor, low hardness circulating cooling water, and phosphorus-free corrosion and scale inhibitor, can solve the problem that the effect of corrosion inhibitor cannot meet the field industrial application. , failure to form an effective system, etc., to avoid eutrophication and heavy metal pollution, to protect the environment, and to achieve good stability.

Active Publication Date: 2014-01-22
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of corrosion inhibitors in other studies can not meet the field industrial application
[0007] In the existing technology, the corrosion and scale inhibitors that can meet the low hardness water quality are rarely used in the circulating cooling water system due to factors such as cost, dosage, technology, etc., and an effective technical solution for the circulating water system has not been formed. There are phosphorus-free corrosion and scale inhibitors that can meet the needs of low hardness water quality to solve the current problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 10% aqueous solution of low molecular weight tetrapolymer of AMPS, acrylic acid, maleic acid, sodium allyl sulfonate AMPS-AA-SAS-MA at a concentration of 30%; low molecular weight quaternary of AMPS-AA-SAS-MA The copolymer is commercially available, and its molecular weight is between 3000 and 5000; the concentration is 50% polyaspartic acid solution 15%, long chain alkyl sulfonate 10%, N-long chain alkyl amino carboxylate 5%, polyhydroxy carboxylate 5%, tungstate 3%, zinc salt 2%, pH stabilizer 1%, water 49%, add to the beaker in turn, stir well to get the required phosphorus-free corrosion and scale inhibition agent.

Embodiment 2

[0019] 15% aqueous solution of low molecular weight tetrapolymer of acrylic acid, maleic acid, sodium allyl sulfonate AMPS-AA-SAS-MA at a concentration of 30%; low molecular weight tetrapolymer of AMPS-AA-SAS-MA The molecular weight is between 3000 and 5000; the concentration is 50% polyaspartic acid solution 10%, long chain alkyl sulfonate 15%, N-long chain alkyl amino carboxylate 5%, polyhydroxy carboxylic acid Add 10% of salt, 2% of tungstate, 2% of zinc salt, 1% of pH stabilizer, and 40% of water into the beaker in turn, and stir evenly to obtain the required phosphorus-free corrosion and scale inhibitor.

Embodiment 3

[0021] 20% aqueous solution of low molecular weight tetrapolymer of acrylic acid, maleic acid, sodium allyl sulfonate AMPS-AA-SAS-MA with a concentration of 30%, low molecular weight tetrapolymer of AMPS-AA-SAS-MA The molecular weight is between 3000 and 5000; the concentration is 50% polyaspartic acid solution 10%, long chain alkyl sulfonate 5%, N-long chain alkyl amino carboxylate 10%, polyhydroxy carboxylic acid Add 10% of salt, 2% of tungstate, 2% of zinc salt, 1% of pH stabilizer, and 40% of water into the beaker in turn, and stir evenly to obtain the required phosphorus-free corrosion and scale inhibitor.

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PUM

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Abstract

The invention discloses a non-phosphorus corrosion and scale inhibitor suitable for the low-hardness water quality. The non-phosphorus corrosion and scale inhibitor is characterized by comprising, by weight, 15% to 20% of AMPS quadripolymer water solutions with the concentration of 30%, 10% to 15% of polyaspartic acid solutions the concentration of 50%, 5% to 10% of hydroxyl carboxylate, 5% to 15% of long-chain alkyl sulfonates, 5% to 10% of N-long-chain alkyl amino carboxylate, 1% to 5% of tungstate, 1% to 3% of zinc salt, 1% to 2% of pH stabilizers selected from sodium hydroxide or hydrochloric acid, and the balance deionized water.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a phosphorus-free corrosion and scale inhibitor for industrial circulating cooling water systems, which is suitable for low-hardness circulating cooling water with calcium hardness less than 40 mg / L. The source of water quality can be natural low-hardness water, demineralized water after ion exchange, electrodialysis, reverse osmosis and other means to reduce hardness, wastewater reuse water with dehardening process, etc. For the circulating water in the cooling system, it is required that the calcium hardness after reaching the concentration ratio is less than 40mg / L. This type of water quality is characterized by low hardness and strong corrosiveness. It relates to a product containing polyaspartic acid, polyhydroxy carboxylate, long-chain alkyl sulfonate, AMPS-AA-SAS-MA tetrapolymer, N-long-chain alkyl amino carboxylate, tungstate , Phosphorus-free corrosion...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12
Inventor 王超秦立娟陶蕾王震石硕年陈军
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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