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Method for synthesizing phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products

A natural product, phosphorus-free corrosion inhibition technology, applied in water/sludge/sewage treatment, chemical instruments and methods, scale removal and water softening, etc., can solve a small amount of biodegradable, non-biodegradable, and decompose non-toxic substances and other problems, to achieve the effect of reducing reproduction, simple and easy control of scale inhibition treatment, and reducing environmental pollution

Active Publication Date: 2012-05-09
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies in recent years have shown that although most polycarboxylate scale inhibitors have low toxicity, they generally cannot be decomposed into simple non-toxic substances under the action of microorganisms and fungi, that is, they cannot be biodegraded or can only be biodegraded in a small amount. Long-term enrichment in water bodies will also pollute the environment

Method used

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  • Method for synthesizing phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products
  • Method for synthesizing phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The natural product is grafted and modified with unsaturated carboxylic acid. The raw materials of the non-phosphorus corrosion and scale inhibitor are: unsaturated carboxylic acid, natural product, concentrated sulfuric acid, catalyst, hydrogen peroxide, water, etc. The parts by weight of each raw material are:

[0027] Unsaturated carboxylic acid 150

[0028] Natural Products 150

[0029] Concentrated sulfuric acid (98%) 20

[0030] Catalyst 10

[0031] Hydrogen peroxide 160

[0032] water 1200

[0033] The unsaturated carboxylic acid is mainly maleic anhydride; the natural product is lignosulfonate, a product of papermaking waste residue, and can also be polysaccharides and their derivatives or humic acid, tannin, etc.; The catalyst is ammonium persulfate.

[0034] The specific preparation method is as follows: add 800 kg of water into the rinsed reactor, pump 20 kg of concentrated sulfuric acid into the reactor under stirring conditions, add 150 kg of maleic a...

Embodiment 2

[0036] The natural product is grafted and modified with unsaturated carboxylic acid. The raw materials of the non-phosphorus corrosion and scale inhibitor are: unsaturated carboxylic acid, natural product, concentrated sulfuric acid, catalyst, hydrogen peroxide, water, etc. The parts by weight of each raw material are:

[0037] Unsaturated carboxylic acid 300

[0038] Natural Products 350

[0039] Concentrated sulfuric acid (98%) 40

[0040] Catalyst 2

[0041] Hydrogen peroxide 260

[0042] water 1600

[0043] The unsaturated carboxylic acid is maleic anhydride; the natural product is papermaking waste residue lignosulfonate; and the catalyst is potassium persulfate.

[0044] The specific preparation method is as follows: first wash the reactor and related equipment, etc., add 1200 kg of water into the reactor, pump 40 kg of sulfuric acid into the reactor under stirring conditions, and add 300 kg of maleic anhydride into the reactor or drop tank Add 350 kilograms of cal...

Embodiment 3

[0046] The natural product is grafted and modified with unsaturated carboxylic acid. The raw materials of the non-phosphorus corrosion and scale inhibitor are: unsaturated carboxylic acid, natural product, concentrated sulfuric acid, catalyst, hydrogen peroxide, water, etc. The parts by weight of each raw material are:

[0047] Unsaturated carboxylic acid 230

[0048] Natural Products 190

[0049] Concentrated sulfuric acid (98%) 70

[0050] Catalyst 15

[0051] Hydrogen peroxide 360

[0052] water 1600

[0053] The unsaturated carboxylic acid is acrylic acid; the natural product is papermaking waste lignosulfonate; and the catalyst is potassium persulfate.

[0054] The preparation method is as follows: first wash the reactor and related equipment, etc., add 1200 kg of water into the reactor, pump 70 kg of sulfuric acid into the reactor under stirring conditions, and add 230 kg of acrylic acid into the reactor or drop tank; Add 190 kg of sodium lignosulfonate and 15 kg of ...

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Abstract

The invention relates to a method for synthesizing a phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products. The method uses maleic anhydride and other unsaturated carboxylic acids to carry out graft modification on natural products, including papermaking waste residue product lignosulphonate, starch and derivatives thereof, other polysaccharides and derivatives thereof, or humic acid, tannic acid and the like. The phosphorus-free corrosion-inhibition scale inhibitor comprises the following raw materials in portions by weight: 100-500 portions of unsaturated carboxylic acid, 20-400 portions of natural product, 0-100 portions of concentrated sulfuric acid, 0.001-50 portions of catalyst, 10-400 portions of oxydol and 100-2,000 portions of water. The product of the invention does not contain phosphorus or nitrogen, has favorable effects of corrosion and scale inhibition in a circulating cooling water system, and is an environmental-protection corrosion-inhibition scale inhibitor.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and in particular relates to a preparation method of a phosphorus-free corrosion and scale inhibitor using natural products as raw materials. Background technique [0002] In recent years, the application of organic phosphoric acid corrosion and scale inhibitors has developed rapidly. The commonly used corrosion and scale inhibitors for domestic circulating cooling water treatment include polyphosphate, phosphate ester, organic phosphoric acid and polymers. Among them, organophosphoric acid agents are widely used for their efficient dual functions of corrosion inhibition and scale inhibition. This type of water treatment agent has stable chemical properties, can withstand higher temperature and pH value, and has obvious solubility limit effect and synergistic effect. Features. However, phosphorus is the nutrient source for bacteria and algae, and phosphorus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F251/00C02F5/10
Inventor 程终发孙宝季王蛟王忠英梁燕孙晓晴孙群峰王燕平
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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