Preparation method of non-phosphorus corrosion and scale inhibitor

A phosphorus-free corrosion and scale inhibitor technology, applied in chemical instruments and methods, descaling and water softening, complex/solubilizing agent treatment, etc., can solve problems such as complex and cumbersome configuration process, adverse consequences, and large differences , to achieve the effects of avoiding eutrophication, good stability and excellent corrosion inhibition performance

Inactive Publication Date: 2015-02-18
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the composite formula, in addition to the above substances, it also includes other components such as polymaleic anhydride, acrylic acid copolymer, benzotriazole or tungstate, borate, etc. The formula is complicated and the configuration process is complic

Method used

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  • Preparation method of non-phosphorus corrosion and scale inhibitor
  • Preparation method of non-phosphorus corrosion and scale inhibitor
  • Preparation method of non-phosphorus corrosion and scale inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example one:

[0028] Prepare 100g of phosphorus-free corrosion and scale inhibitor solution: add 7.5g of sodium gluconate, 11.05g of zinc sulfate, and 2.05g of rare earth metal salts to 58.45g of water, stir well, and then add 10g of polyepoxysuccinic acid for scale inhibition and dispersion 10.7g of agent, stir evenly, finally add 0.25g of benzotriazole, stir until fully dissolved, and filter to obtain.

[0029] Use the prepared 100g of the phosphorus-free corrosion and scale inhibitor solution and add it to the industrial water to be treated at a concentration of 300mg / L.

Example Embodiment

[0030] Embodiment two:

[0031] Prepare 100g of phosphorus-free corrosion and scale inhibitor solution: add 5.0g of sodium gluconate, 11.05g of zinc sulfate, and 2.05g of rare earth metal salts to 44.35g of water, stir well, and then add 10g of polyepoxysuccinic acid, N-long 16.6g of chain alkylamino carboxylic acid, 10.7g of scale inhibitor and dispersant, stir evenly, finally add 0.25g of benzotriazole, stir until fully dissolved, and filter to obtain.

[0032] Use the prepared 100g of the phosphorus-free corrosion and scale inhibitor solution and add it to the industrial water to be treated at a concentration of 150mg / L.

Example Embodiment

[0033] Embodiment three:

[0034] Prepare 100g of phosphorus-free corrosion and scale inhibitor solution: add 5.0g of sodium gluconate and 5.53g of zinc sulfate to 63.92g of water, stir well, then add 7.5g of polyepoxysuccinic acid and 12.5 of N-long chain alkyl amino carboxylic acid g, 5.35g scale inhibitor dispersant, stir evenly, and finally add 0.2g benzotriazole and stir until it is fully dissolved, then filter to obtain.

[0035] Use the prepared 100g of the phosphorus-free corrosion and scale inhibitor solution and add it to the industrial water to be treated at a concentration of 400mg / L.

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Abstract

The invention relates to a preparation method of a non-phosphorus corrosion and scale inhibitor. The preparation method of the non-phosphorus corrosion and scale inhibitor is characterized by being blended from the following components in percentage by weight: 1) 5-15% of polyepoxysuccinic acid, 2) 5-15% of a dirt dispersion agent, 3) 20-50% of organic carboxylic acid, 4) 5-10% of zinc salt, 5) 0.1-0.5% of imidazole, 6) 0.5-3% of an inorganic corrosion inhibitor, and 7) the balance of water according to mass percent, wherein the polyepoxysuccinic acid is a market-sold liquid preparation, the solid content is 40%, and the degree of polymerization n is an integer of 10-50. The preparation steps are as follows: adding the zinc salt and the inorganic corrosion inhibitor in a fixed amount of water, fully stirring to completely dissolve the zinc salt and the inorganic corrosion inhibitor, then adding the polyepoxysuccinic acid, the dirt dispersion agent and the organic carboxylic acid, fully stirring, finally adding the imidazole until the imidazole is completely dissolved, and filtering.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a preparation method of a phosphorus-free corrosion and scale inhibitor, in particular to a preparation method of a phosphorus-free corrosion and scale inhibitor suitable for medium-alkali hard water. It is a phosphorus-free, nitrogen-free, biodegradable and environmentally friendly pharmaceutical preparation method suitable for industrial circulating cooling water systems. Background technique [0002] During the continuous circulation of industrial cooling water in the circulation system, there will be different degrees of precipitation and adhesion of sediments, metal corrosion and microbial growth, which will cause sticky sludge to block pipes, reduce the efficiency of heat exchange equipment, and corrode and perforate, etc. Serious consequences will threaten and destroy the long-term safe production of the factory. The use of appropriate corrosion and sca...

Claims

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Application Information

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IPC IPC(8): C02F5/08C02F5/10C02F5/12
CPCC02F5/105C02F5/125C23F11/08C02F2103/023
Inventor 秦立娟陶蕾王超武建刚王昊王震石硕年
Owner CHINA NAT OFFSHORE OIL CORP
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