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Biodegradable non-phosphorous anti-scale corrosion inhibitor and preparation method thereof

A phosphorus-free scale inhibition and biodegradation technology, applied in chemical instruments and methods, scale removal and water softening, water/sludge/sewage treatment, etc., can solve problems such as no field application conclusions, and achieve the goal of reducing treatment costs Effect

Inactive Publication Date: 2012-11-14
ZHEJIANG ZHENENG TECHN RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101077810A discloses a green scale and corrosion inhibitor for stainless steel condensers, which is composed of polyaspartic acid and polymaleic acid, but only in the laboratory to evaluate its polarization potential and static scale inhibition Scale and corrosion inhibition effect, no field application conclusion

Method used

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  • Biodegradable non-phosphorous anti-scale corrosion inhibitor and preparation method thereof
  • Biodegradable non-phosphorous anti-scale corrosion inhibitor and preparation method thereof
  • Biodegradable non-phosphorous anti-scale corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Select raw materials according to mass percentage:

[0031]

[0032]

[0033] Water 130g, maleic anhydride / acrylic acid / acrylic acid hydroxylactone / 2-acrylamido-2-methylpropanesulfonic acid tetrapolymer (molecular weight 2000-10000, monomer maleic anhydride, acrylic acid in tetrapolymer The mass ratio of hydroxylactone acrylate and 2-acrylamido-2-methylpropanesulfonic acid is 2:6:1:1. The preparation method refers to: Liu Xiang et al., Synthesis of MAHA tetrapolymer and its scale inhibition Performance, Modern Chemical Industry, 29 (7), 2009.7;) 600g, zinc chloride 50g, polyepoxysuccinic acid (molecular weight 700-800, quality standard HG / T3823-2006, produced by Shanghai Meijing Environmental Protection Material Co., Ltd.) 100g, Polyaspartic acid (molecular weight 4000-5000, quality standard HG / T3822-2006, produced by Shijiazhuang Desai Chemical Co., Ltd.) 100g, fluorescent tracer (carboxysulfonaphthalimide) 20g were added to the reaction kettle in turn , stirred...

Embodiment 2

[0035] Select raw materials according to mass percentage:

[0036]

[0037] Water 85g, maleic anhydride / acrylic acid / acrylic acid hydroxylactone / 2-acrylamido-2-methylpropanesulfonic acid tetrapolymer (molecular weight 2000-10000, monomer maleic anhydride, acrylic acid in tetrapolymer The mass ratio of hydroxylactone acrylate and 2-acrylamido-2-methylpropanesulfonic acid is 2:6:1:1, and the preparation method is the same as in Example 1) 600g, zinc sulfate heptahydrate 95g, polyepoxysuccinate Acid (molecular weight 700-800, quality standard HG / T3823-2006, produced by Shanghai Meijing Environmental Protection Materials Co., Ltd.) 75g, polyaspartic acid (molecular weight 4000-5000, quality standard HG / T3822-2006, Shijiazhuang Desai Chemical Co., Ltd. Produced by the company) 125g, fluorescent tracer (carboxysulfonyl naphthalimide) 20g were added to the reaction kettle in turn, and stirred at 30~35℃ for 1~1.5 hours to obtain a biodegradable phosphorus-free scale inhibitor Etch...

Embodiment 3

[0039] Select raw materials according to mass percentage:

[0040]

[0041]Water 165g, maleic anhydride / acrylic acid / acrylic acid hydroxylactone / 2-acrylamido-2-methylpropanesulfonic acid tetrapolymer (molecular weight 2000-10000, monomer maleic anhydride, acrylic acid in tetrapolymer The mass ratio of hydroxylactone acrylate and 2-acrylamido-2-methylpropanesulfonic acid is 2:6:1:1, and the preparation method is the same as in Example 1) 550g, zinc sulfate monohydrate 65g, polyepoxysuccinate Acid (molecular weight 700-800, quality standard HG / T3823-2006, produced by Shanghai Meijing Environmental Protection Materials Co., Ltd.) 50g, polyaspartic acid (molecular weight 4000-5000, quality standard HG / T3822-2006, Shijiazhuang Desai Chemical Co., Ltd. Produced by the company) 150g, fluorescent tracer (carboxysulfonaphthalimide) 20g were sequentially added to the reaction kettle, stirred at 30~35℃ for 1~1.5 hours, and the biodegradable phosphorus-free scale inhibitor Etching age...

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Abstract

The invention discloses a biodegradable non-phosphorous anti-scale corrosion inhibitor and a preparation method thereof. The biodegradable non-phosphorous anti-scale corrosion inhibitor comprises, by mass, 10-20% of polyaspartic acid, 5-20% of polyepoxysuccinic acid, 30-60% of copolymers, 5-10% of zinc salt, 2-5% of fluorescent tracers and the balance water, wherein the molecular weight of the copolymers ranges from 2000-10000, and the copolymers are maleic anhydride / acrylic acid / acrylic acid oxylactone / 2-acrylamide-2-methylpro panesulfonic acid quaternary copolymers. The non-phosphorous anti-scale corrosion inhibitor is used for stainless steel condenser circulating cooling water systems of thermal power plants, is non-phosphorous, non-toxic, easily biodegradable, free from environmental problems and unlimited in discharge, and is capable of controlling carbon steel corrosion rate to be smaller than or equal to 0.075mm / a, controlling corrosion rate of copper, copper alloy and stainless steel to be smaller than or equal to 0.005mm / a, controlling dirt deposition rate to be smaller than or equal to 15mcm and controlling scale inhibition rate to be larger than or equal to 80%.

Description

(1) Technical field [0001] The invention relates to the field of water treatment, in particular to a water treatment agent for a circulating cooling water system of a stainless steel condenser in a thermal power plant, that is, a biodegradable and environment-friendly phosphorus-free scale and corrosion inhibitor. (2) Background technology [0002] At present, most of the water treatment agents used in the circulating cooling water system of condensers in thermal power plants in my country are phosphorus-containing agents, and the phosphorus content in circulating water is generally above 2.0mg / L, but phosphorus is a nutrient source for bacteria and algae, and phosphorus-containing water treatment It is easy to cause eutrophication of the water environment, promote the growth of bacteria and algae, and cause water pollution. my country's current "Comprehensive Sewage Discharge Standard" GB8978-1996 primary discharge standard requires that the maximum allowable discharge conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
Inventor 邬东立张国鑫刘昕朱云水诸育德周国平陆军
Owner ZHEJIANG ZHENENG TECHN RES INST
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