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Efficient low-phosphorus compound water treatment agent

A water treatment agent, high-efficiency technology, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc. High-level problems, to achieve good synergistic effect, small impact, low phosphorus content

Inactive Publication Date: 2012-10-10
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency and low-phosphorus composite water treatment agent to overcome the existing materials in the prior art, such as polyaminopolyether-based methylene phosphonic acid (PAPEMP), 2-hydroxyphosphonoacetic acid (HPAA) itself containing Disadvantages such as high phosphorus content and not easy to biodegrade, not environmentally friendly, composite water treatment agent is not low in phosphorus, and large dosage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of composite water treatment agent: 30% polyaspartic acid (PESA), 11% 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 2% zinc sulfate heptahydrate, 1 % benzotriazole, 28% maleic acid-acrylic acid copolymer (brand SQ-934, produced by Shandong Tianqing Technology Development Co., Ltd.), and 28% deionized water were added to the reaction vessel at room temperature and stirred evenly That is, the desired high-efficiency composite water treatment agent is obtained.

[0023] The above-mentioned test water quality was used to carry out the calcium carbonate scale inhibition and rotary coupon tests. The dosage of the composite water treatment agent was 16mg / L, the static scale inhibition rate was 84.38%, the corrosion rate to carbon steel was 0.034mm / a, and the corrosion rate to copper was 0.0017mm / a, the corrosion rate of stainless steel is 0.0004mm / a.

[0024] Example 1 Phosphate control and discharge standards in circulating water at different magnification...

Embodiment 2

[0027] Preparation of composite water treatment agent: 36% polyaspartic acid (PESA), 9% 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 1% zinc chloride, 0.5% Benzotriazole, 25% maleic acid-acrylic acid copolymer (brand SQ-934, produced by Shandong Tianqing Science and Technology Development Co., Ltd.), and 28.5% deionized water were added to the reaction vessel at room temperature, and stirred evenly. Get the desired high-efficiency composite water treatment agent.

[0028] The above-mentioned test water quality was used to carry out the calcium carbonate scale inhibition and rotary coupon tests. The dosage of the composite water treatment agent was 20mg / L, the static scale inhibition rate was 85.73%, the corrosion rate to carbon steel was 0.047mm / a, and the corrosion rate to copper was 0.0015mm / a, the corrosion rate of stainless steel is 0.0005mm / a.

[0029] Example 2 Phosphate Control Standards and Emissions in Circulating Water at Different Rates (Table 3)

[0030] ...

Embodiment 3

[0032] Preparation of composite water treatment agent: 38% polyaspartic acid (PESA), 12% 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 4% zinc sulfate, 0.5% benzene Paratriazole, 18% maleic acid-acrylic acid copolymer (brand SQ-934, produced by Shandong Tianqing Science and Technology Development Co., Ltd.), and 27.5% deionized water were added to the reaction vessel at room temperature, and stirred evenly to obtain The required high-efficiency composite water treatment agent.

[0033]The above-mentioned test water quality was used to carry out the calcium carbonate scale inhibition and rotary coupon tests. The dosage of the composite water treatment agent was 15mg / L, the static scale inhibition rate was 87.3%, the corrosion rate to carbon steel was 0.046mm / a, and the corrosion rate to copper was 0.0014mm / a, the corrosion rate of stainless steel is 0.0002mm / a.

[0034] Example 3 Phosphate Control Standards and Emissions in Circulating Water at Different Rates (Table 4)...

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Abstract

The invention provides an efficient low-phosphorus compound water treatment agent and belongs to the technical field of industrial circulating cooling water treatment. The water treatment agent consists of the following raw materials: polyaspartic acid (PESA), 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), zinc salt, azoles, maleic acid-acrylic copolymer (MA / AA) and deionized water, wherein PESA is taken as a main scale inhibitor, PBTCA and MA / AA are taken as auxiliary scale inhibitors, a corrosion inhibitor is formed by the zinc salt, the azoles, PBTCA and PESA, and MA / AA is taken as a dispersing agent. By fully utilizing the synergistic effect of various components, a multifunctional low-phosphorus compound water treatment agent with scale and corrosion inhibition functions is formed.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment and relates to a water treatment agent. Background technique [0002] In the circulating water system, there are mainly three problems of scaling, corrosion and microbial hazards. The most convenient and effective way to prevent system scaling and corrosion is to add corrosion and scale inhibitors to the circulating water. my country's industrial circulating cooling water treatment formula chemicals have gradually developed from the initial phosphorus-based, molybdenum-based, silicon-based, and chromium-based compounds to compound agents with phosphorus-based formulations as the main agent. The main agent is phosphonic acid (-PO3H2) Corrosion and scale inhibitors linked by carbon atoms are often referred to as organic phosphonic acids. They mainly include hydroxyethylidene diphosphonic acid (HEDP), aminotrimethylenephosphonic acid (ATMP), ethylenediaminetetr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 胡新霞刘文峰高云峰张福义刘杰华王金明柴斌张雷
Owner SHANDONG TIANQING TECH DEV
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