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Corrosion-inhibition scale inhibitor composition and corrosion-inhibition scale inhibitor and application thereof

A technology of corrosion and scale inhibitors and compositions, which is applied in the field of corrosion and scale inhibitors and corrosion and scale inhibitor compositions, can solve the problems of limited treatment effect, high labor intensity, and large alkali consumption, and achieve good mitigation Corrosion performance and scale inhibition performance, improvement of corrosion inhibition performance, and the effect of inhibiting corrosion

Active Publication Date: 2012-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this method consumes a lot of alkali, and the cost is high. On the other hand, the labor intensity is high, and the treatment effect is also limited.

Method used

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  • Corrosion-inhibition scale inhibitor composition and corrosion-inhibition scale inhibitor and application thereof
  • Corrosion-inhibition scale inhibitor composition and corrosion-inhibition scale inhibitor and application thereof
  • Corrosion-inhibition scale inhibitor composition and corrosion-inhibition scale inhibitor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0074] This example is used to illustrate the corrosion and scale inhibitor provided by the present invention and its preparation method.

[0075] Various raw materials in the corrosion and scale inhibitor compositions of Examples 1-7 and the conditions for mixing the corrosion and scale inhibitor compositions with water are shown in Table 2, wherein polyepoxysuccinic acid, hydrolyzed polymaleic anhydride, acrylic acid Copolymer with 2-acrylamido-2-methyl-propanesulfonic acid, Copolymer of acrylic acid with 2-acrylamido-2-methyl-propanesulfonic acid and maleic anhydride, Acrylic acid with methyl acrylate and acrylate hydroxy Propyl ester copolymers were purchased from Beijing Linhua Water Quality Stabilizer Factory, and the trade numbers were RP-112, BC-500, RP-35, RP-33, and BC-508.

[0076] Table 2

[0077]

experiment Embodiment 1-9

[0079] This experimental example is used to illustrate the corrosion and scale inhibition performance test of the corrosion and scale inhibitors.

[0080] With reference to the GB / T 18175-2000 standard "Measurement of Corrosion Inhibition Performance of Water Treatment Agents by Rotary Coupon Method", the corrosion and scale inhibitors obtained in Examples 1-7 of the present invention and blank sample A are disclosed in Example 2 of CN101805067A The composite corrosion inhibitor B carried out the rotary coupon corrosion test, and with reference to the GB / T 16632-2008 standard "Measuring Calcium Carbonate Deposition Method for Scale Inhibition Performance of Water Treatment Agents", the corrosion inhibitors obtained in Examples 1-7 of the present invention Scale inhibitor, blank sample A and composite corrosion inhibitor B disclosed in Example 2 of CN101805067A were subjected to calcium carbonate scale inhibition test.

[0081] Test water quality: Calcium hard (as CaCO 3 Calcula...

experiment Embodiment 10

[0087] The corrosion and scale inhibitor obtained in Example 1 of the present invention is carried out laboratory dynamic simulation test (with reference to the chemical industry standard HG / T 2160-2008 "cooling water dynamic simulation test method"), using the same method as in Experimental Examples 1-9 water quality as supplementary water. The mass concentration of corrosion and scale inhibitors in water is controlled at 90-110mg / L.

[0088] 2 pieces of Φ10×1×500mm 20 # The carbon steel test tubes were tested in parallel, and the test water added with the corrosion and scale inhibitor of the present invention went through the tubes. The test tube is externally heated with saturated steam, the temperature of the experimental water inlet is controlled at 30±1°C, the temperature difference between the inlet and outlet is 10°C, the flow rate is 0.8-1m / s, and the total phosphorus (as PO 4 3- meter) mass concentration is 8mg / L, the concentration multiple of circulating water (b...

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Abstract

The invention provides a corrosion-inhibition scale inhibitor composition, a corrosion-inhibition scale inhibitor and an application thereof, wherein the corrosion-inhibition scale inhibitor composition comprises water-soluble oxidizable inorganic metal salts, water-soluble inorganic zinc salts, phosphine compounds and polymers; the weight ratio of the water-soluble oxidizable inorganic metal salts, the water-soluble inorganic zinc salts, the phosphine compounds and the polymers is 0.005-0.2:0.05-1:0.1-0.75:1; the polymer is selected from one or more than one of hydrolyzed polymaleic anhydride, polyaspartic acid, polyepoxy succinic acid, and polyacrylic acid polymers. The corrosion-inhibition scale inhibitor composition and the corrosion-inhibition scale inhibitor provided by the invention has both good corrosion inhibition and scale inhibition.

Description

technical field [0001] The invention relates to a corrosion and scale inhibitor composition, a corrosion and scale inhibitor containing the corrosion and scale inhibitor composition of the invention and applications thereof. Background technique [0002] When replenishing water with an alkalinity lower than 30 mg / L (calculated as calcium carbonate) in the circulating water, the pH of the naturally operating circulating water is generally less than 7.0. When the sewage is returned to the circulating water system, that is, when it contains high After the sewage with a high concentration of ammonia nitrogen enters the circulating water system, it needs to be aerated through the cooling tower, and the NH 3 Continuously blow off in the cooling tower, NH 4 + leave H + Continual accumulation, therefore, also keeps the pH of the circulating water below 7.0. [0003] When dealing with weakly acidic water quality, the method of adding high-concentration polyphosphate in circulatin...

Claims

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Application Information

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IPC IPC(8): C02F5/14
CPCC23F14/02C23F11/08
Inventor 余正齐李亚红李本高
Owner CHINA PETROLEUM & CHEM CORP
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