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Phosphorus-free corrosion and scale inhibitor for water treatment, and preparation method thereof

A phosphorus-free corrosion inhibition and water treatment technology, applied in the field of water treatment, can solve the problems of complex formulations and no formulations of phosphorus-free corrosion and scale inhibitors, and achieve rich sources, excellent corrosion and scale inhibition effects, and simple preparation processes Effect

Inactive Publication Date: 2015-11-18
广州市鑫川工程技术开发公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents 200710052475, 200810039161, 200610127172, and 2009100205068 disclose the formulation of non-phosphorus corrosion and scale inhibitors, which contain molybdate and polyepoxysuccinic acid that play a role in corrosion inhibition, but the above corrosion and scale inhibitors The agent also contains other components such as polymaleic anhydride, acrylic acid copolymer, triethanolamine, benzotriazole (BTA) or tungstate, borate, etc., and the formula is complex
However, for chemical wastewater to be used as circulating cooling water after secondary biochemical treatment, there is no efficient phosphorus-free corrosion and scale inhibitor formula

Method used

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  • Phosphorus-free corrosion and scale inhibitor for water treatment, and preparation method thereof

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Embodiment 1

[0031] In the embodiment of the present invention, a phosphorus-free corrosion and scale inhibitor for water treatment is composed of the following raw materials in parts by weight:

[0032] Sodium metasilicate 30 parts

[0033] Ammonium acetate 15 parts

[0034] 45 parts of monoglyceride succinate

[0035] 10 parts citric acid

[0036] 100 parts of water.

[0037] The preparation method of the phosphorus-free corrosion and scale inhibitor for water treatment is to dissolve sodium metasilicate in half of the water to obtain an aqueous sodium metasilicate solution; then dissolve ammonium acetate in the remaining half of the water to obtain acetic acid Ammonium aqueous solution; heat sodium metasilicate aqueous solution to 60°C, then add citric acid, stir for 30 minutes, then heat up to 100°C, add succinic acid monoglyceride, stir for 5 minutes, add ammonium acetate aqueous solution, continue stirring for 1 hour, drop to The non-phosphorus corrosion and scale inhibitor for w...

Embodiment 2

[0042] In the embodiment of the present invention, a phosphorus-free corrosion and scale inhibitor for water treatment is composed of the following raw materials in parts by weight:

[0043] Sodium metasilicate 50 parts

[0044] 35 parts of ammonium acetate

[0045] 60 parts of monoglyceride succinate

[0046] 20 parts citric acid

[0047] 150 parts of water.

[0048] The preparation method of the phosphorus-free corrosion and scale inhibitor for water treatment is to dissolve sodium metasilicate in half of the water to obtain an aqueous sodium metasilicate solution; then dissolve ammonium acetate in the remaining half of the water to obtain acetic acid Ammonium aqueous solution; heat sodium metasilicate aqueous solution to 90°C, then add citric acid, stir for 50 minutes, then heat up to 120°C, add monoglyceride succinate, stir for 10 minutes, add ammonium acetate aqueous solution, continue stirring for 1.5h, drop After reaching room temperature, the non-phosphorus corrosi...

Embodiment 3

[0053] In the embodiment of the present invention, a phosphorus-free corrosion and scale inhibitor for water treatment is composed of the following raw materials in parts by weight:

[0054] Sodium metasilicate 35 parts

[0055] Ammonium acetate 20 parts

[0056] 50 parts of monoglyceride succinate

[0057] 13 parts citric acid

[0058] 120 parts of water.

[0059] The preparation method of the phosphorus-free corrosion and scale inhibitor for water treatment is to dissolve sodium metasilicate in half of the water to obtain an aqueous sodium metasilicate solution; then dissolve ammonium acetate in the remaining half of the water to obtain acetic acid Ammonium aqueous solution; heat sodium metasilicate aqueous solution to 70°C, then add citric acid, stir for 35 minutes, then raise the temperature to 105°C, add monoglyceride succinate, stir for 6 minutes, add ammonium acetate aqueous solution, continue stirring for 1.1h, drop After reaching room temperature, the non-phosphor...

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Abstract

The invention discloses a phosphorus-free corrosion and scale inhibitor for water treatment, and a preparation method thereof. The phosphorus-free corrosion and scale inhibitor for water treatment comprises, by weight, 30-50 parts of sodium metasilicate, 15-35 parts of ammonium acetate, 45-60 parts of succinylated monoglycerides, 10-20 parts of citric acid and 100-150 parts of water. The method comprises the following steps: dissolving sodium metasilicate in half of water to prepare an aqueous solution of sodium metasilicate; dissolving ammonium acetate in the remaining water to prepare an aqueous solution of ammonium acetate; and heating the aqueous solution of sodium metasilicate to 60-90DEG C, adding citric acid, stirring for 30-50min, heating to 100-120DEG C, adding succinylated monoglyceride, stirring for 5-10min, adding the aqueous solution of ammonium acetate, continuously stirring for 1-1.5h, and cooling to room temperature in order to obtain the phosphorus-free corrosion and scale inhibitor for water treatment. The corrosion and scale inhibitor for water treatment is free from phosphorus, so the corrosion and scale inhibitor is nontoxic to environment and has no pollution to the environment; the corrosion and scale inhibitor has good corrosion and scale inhibition effects; and the corrosion and scale inhibitor also has the advantages of abundant sources of raw materials, simple preparation process, low cost, and suitableness for industrial circulating cooling water systems.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a phosphorus-free corrosion and scale inhibitor for water treatment and a preparation method thereof. Background technique [0002] During the recycling process of industrial cooling water, there will be different degrees of inorganic salt deposition, corrosion, bacteria and algae growth and other problems, resulting in serious consequences such as reduced efficiency of heat exchange equipment, blockage, corrosion and perforation, and bring great hidden dangers to industrial production. . The use of appropriate corrosion and scale inhibitors and supporting water treatment agents can reduce the adverse effects caused by corrosion, scaling, and bacterial growth of metal materials in equipment and pipelines, prolong the service life of equipment, and reduce the energy and resources caused by corrosion. Losses are reduced to a minimum. [0003] Due to the advantages of good chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/12C02F5/10
CPCC02F5/125C02F2103/023C02F2303/08
Inventor 俞亮亮
Owner 广州市鑫川工程技术开发公司
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