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Preparation method of environment-friendly corrosion and scale inhibitor for industrial circulating water

A corrosion and scale inhibitor, industrial circulating water technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. The problem of high corrosion rate can achieve the effect of excellent scale inhibition and dispersion effect, good thermal stability and high slow release rate.

Inactive Publication Date: 2018-02-16
WUXI HAOYU ENERGY SAVING ENVIRONMENTAL PROTECTION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The invention provides a preparation method of an environment-friendly corrosion and scale inhibitor for industrial circulating water, which solves the problem of low scale inhibition rate, high corrosion rate, low metal ion chelating ability and Technical problems such as poor thermal stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Weigh according to the ratio of parts by mass: 100 parts of double distilled water, 1.5 parts of urea, 13 parts of tannic acid, 7.5 parts of ammonium hydrogen phosphate, 0.6 parts of ethanolamine, 10 parts of diethylenetriamine, polyacrylic acid 34 parts of sodium, 4 parts of polyacrylamide, 15 parts of red mud, 20 parts of sulfuric acid, 0.5 parts of trichlorophenol, 6.5 parts of polyepoxysuccinic acid, 4 parts of HPAA, 10 parts of acrylate, 4 parts of succinic anhydride.

[0026] Step 2: Put sodium polyacrylate, polyacrylamide, sulfuric acid and red mud into an enamel reaction kettle equipped with a thermometer, heating device, reflux condenser and stirrer, raise the temperature to 50°C, start the stirrer to stir for 30 minutes, and the stirring speed 300r / min.

[0027] Step 3: Add double distilled water, ammonium hydrogen phosphate, urea and diethylenetriamine, raise the temperature to 75°C, stir at constant temperature for 60 minutes, and the stirring speed ...

Embodiment 2

[0031]Step 1: Weigh according to the ratio of parts by mass: 100 parts of double distilled water, 3.5 parts of urea, 17 parts of tannic acid, 11.5 parts of ammonium hydrogen phosphate, 1 part of ethanolamine, 30 parts of diethylenetriamine, polyacrylic acid 40 parts of sodium, 8 parts of polyacrylamide, 25 parts of red mud, 40 parts of sulfuric acid, 0.9 parts of trichlorophenol, 8.5 parts of polyepoxysuccinic acid, 8 parts of HPAA, 20 parts of acrylate, and 8 parts of succinic anhydride.

[0032] Step 2: Put sodium polyacrylate, polyacrylamide, sulfuric acid and red mud into the enamel reaction kettle equipped with thermometer, heating device, reflux condenser and stirrer, raise the temperature to 70°C, start the stirrer to stir for 50min, the stirring speed 400 r / min.

[0033] Step 3: Add double distilled water, ammonium hydrogen phosphate, urea and diethylenetriamine, raise the temperature to 95°C, stir at constant temperature for 120min, and the stirring speed is 650 r / min...

Embodiment 3

[0037] Step 1: Weigh according to the ratio of parts by mass: 100 parts of double distilled water, 2.5 parts of urea, 15 parts of tannic acid, 9.5 parts of ammonium hydrogen phosphate, 0.8 parts of ethanolamine, 20 parts of diethylenetriamine, polyacrylic acid 37 parts of sodium, 6 parts of polyacrylamide, 20 parts of red mud, 30 parts of sulfuric acid, 0.7 parts of trichlorophenol, 7.5 parts of polyepoxysuccinic acid, 6 parts of HPAA, 15 parts of acrylate, 6 parts of succinic anhydride.

[0038] Step 2: Put sodium polyacrylate, polyacrylamide, sulfuric acid and red mud into an enamel reaction kettle equipped with a thermometer, a heating device, a reflux condenser and a stirrer, raise the temperature to 60°C, start the stirrer to stir for 40 minutes, and the stirring speed 350 r / min.

[0039] Step 3: Add double distilled water, ammonium hydrogen phosphate, urea and diethylenetriamine, raise the temperature to 85°C, stir at constant temperature for 90min, and the stirring spee...

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Abstract

The invention discloses a preparation method of an environment-friendly corrosion and scale inhibitor for industrial circulating water. The environment-friendly corrosion and scale inhibitor is prepared from raw materials as follows: double distilled water, urea, a deoxidant, ammonium hydrogen phosphate, ethanol amine, diethylenetriamine, sodium polyacrylate, polyacrylamide, red mud, sulfuric acid, trichlorophenol, polyepoxysuccinic acid, HPAA (hydroxyphosphonoacetic acid),acrylic ester and succinic anhydride; the corrosion and scale inhibitor has good scale inhibiting and dispersion effects at the temperature of 150-170 DEG C; the BOD removal rate is 90%-98%, the calcium carbonate scale inhibiting rate is 99.2%-99.6%, the phosphorus removal rate is up to 99.5%-99.9%, the paraffin controlrate is 88%-92%, the rate of corrosion to carbon steel is 0.0018-0.0022 mm / a, the COD removal rate is 84%-94%, the calcium carbonate scale inhibiting rate is up to 99%-99.6%, the strontium sulfate scale inhibiting rate is 99.2%-99.6%, and the rate of corrosion inhibition to carbon steel is 89%-97%.

Description

technical field [0001] The invention relates to an environment-friendly material, in particular to a preparation method of an environment-friendly corrosion and scale inhibitor for industrial circulating water. Background technique [0002] Scale and corrosion inhibitors are composed of organic phosphine, high-quality copolymers and copper corrosion inhibitors. They have excellent corrosion inhibition performance on carbon steel, copper and copper alloys, and excellent scale and dispersion performance on calcium carbonate and calcium phosphate. This product is mainly used in open circulating cooling water treatment systems, especially suitable for systems containing copper equipment. This product can be used in water with high pH, ​​high alkalinity, and high hardness. It is currently one of the ideal water treatment agents for alkaline operation without pH adjustment. [0003] There are many kinds of scale and corrosion inhibitors, which are usually compounded with some spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12
CPCC02F5/105C02F5/125C02F2303/08
Inventor 胡晓荣俞娟胡瑜
Owner WUXI HAOYU ENERGY SAVING ENVIRONMENTAL PROTECTION EQUIP CO LTD
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