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Corrosion inhibitors and corrosion inhibitor compositions, and preparation methods thereof, application of corrosion inhibitors and corrosion inhibitor compositions to inhibition of aqueous corrosion, and treating method for circulating water

A technology of corrosion inhibitor and composition, applied to corrosion inhibitor, application of the aforementioned corrosion inhibitor or the aforementioned corrosion inhibitor composition in inhibiting water corrosion, corrosion inhibitor composition, treatment of circulating water, aforementioned corrosion inhibitor In the field of agent preparation, it can solve the problems of unfavorable cooling water circulation and other problems, and achieve the effect of not being easily used by microorganisms, good corrosion inhibition effect, and long-lasting drug effect

Active Publication Date: 2017-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this composite corrosion and scale inhibitor compounded several substances together, and its influence on microorganisms was the superposition of various substances. While it was easy to biodegrade, it was also easy to be used by microorganisms, resulting in the reproduction of microorganisms, which was not conducive to Circulation of cooling water

Method used

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  • Corrosion inhibitors and corrosion inhibitor compositions, and preparation methods thereof, application of corrosion inhibitors and corrosion inhibitor compositions to inhibition of aqueous corrosion, and treating method for circulating water
  • Corrosion inhibitors and corrosion inhibitor compositions, and preparation methods thereof, application of corrosion inhibitors and corrosion inhibitor compositions to inhibition of aqueous corrosion, and treating method for circulating water
  • Corrosion inhibitors and corrosion inhibitor compositions, and preparation methods thereof, application of corrosion inhibitors and corrosion inhibitor compositions to inhibition of aqueous corrosion, and treating method for circulating water

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Experimental program
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Effect test

preparation example Construction

[0037] Simultaneously, the present invention also provides a preparation method of a corrosion inhibitor, the preparation method comprising: under condensation reaction conditions, in the presence of a catalyst, aliphatic hydroxycarboxylic acid and / or its salt and alcohol amine in water contact to form the corrosion inhibitor; wherein, the aliphatic hydroxycarboxylic acid has the structure shown in the following formula I; the alcohol amine has the structure shown in the following formula II,

[0038]

[0039] In the formula I, R 1 is H or OH, R 2 for H or COOH, R 3 for COOH, CH 2 -COOH or In the formula II, R 4 and R' 4 the same or different, and independently selected from H and R 5 for H or CH 3 , n is an integer from 1 to 4. In the formula III, R 6 for H or CH 3 , R 7 for CH 3 or CH 2 CH 3 .

[0040] The preparation method of the corrosion inhibitor provided by the present invention forms a water-soluble condensation reaction product by promoting the c...

preparation example 1

[0078] Add 32.7g (0.15mol) of sodium gluconate, 14.9g (0.1mol) of triethanolamine and 100ml of water into a four-necked flask equipped with a stirrer, a distillation device and a thermometer, and start stirring to fully dissolve the sodium gluconate and triethanolamine mix. At room temperature (20°C), 5 g of concentrated sulfuric acid (containing H 2 SO 4 , 0.05mol). Heat up the heating bath (heating medium is dimethyl silicone oil) with the aforementioned flask built in to 130°C, react for 6 hours, distill out 40g of water, and cool the remaining liquid in the flask to obtain a phosphorus-free corrosion inhibitor. This product is recorded as S1, the solid content of the corrosion inhibitor S1 is determined to be 39.9% by weight, and the molecular weight distribution of the condensation reaction product in the corrosion inhibitor S1 is determined to be in the range of 327-683.

preparation example 2-5

[0080] Preparation method of phosphorus-free corrosion inhibitor: refer to the preparation method of phosphorus-free corrosion inhibitor in Preparation Example 1, the difference is shown in the following table:

[0081] Preparation example

[0082] The phosphorus-free corrosion inhibitor prepared in Preparation Example 2-5 is designated as S2-S5.

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Abstract

The invention discloses corrosion inhibitors and corrosion inhibitor compositions, and preparation methods thereof, application of the corrosion inhibitors and the corrosion inhibitor compositions to inhibition of aqueous corrosion, and a treating method for circulating water. The corrosion inhibitors contain products of condensation reactions of compounds as shown in a formula I which is described in the specification and / or salts thereof with compounds as shown in a formula II and / or a formula III which is described in the specification. In the formula I, R<1> is H or OH; R<2> is H or COOH; R<3> is COOH, CH<2>-COOH or C<3>H<6>O<2> as described in the specification. In the formula II, R<4> and R'<4> are identical or different and are separately and independently selected from a group consisting of H and C<n+1>H<2n+2>OR<5> as described in the specification, R<5> is OH or CH<3>, and n is an integer in a range of 1 to 4. In the formula III, R<6> is H or CH<3>, and R<7> is CH<3> or CH<2>CH<3>. The corrosion inhibitors have good slow release effect, are not prone to utilization by microbes and pose little influence to the content of microbes in water in the process of usage.

Description

technical field [0001] The present invention relates to the field of water treatment, specifically, to a corrosion inhibitor and a corrosion inhibitor composition containing the corrosion inhibitor; the present invention also relates to a preparation method of the aforementioned corrosion inhibitor; the present invention further relates to a The application of the aforementioned corrosion inhibitor or the aforementioned corrosion inhibitor composition in inhibiting water corrosion; the present invention further relates to a treatment method for circulating water. Background technique [0002] Cooling water is an indispensable public works for industry and enterprises, and it is a major water user. Recycling the cooling water after treatment, on the one hand, can meet the requirements of the process for water treatment effect and ensure the long-term normal operation of the production device; on the other hand, it can save more than 98% of industrial water and reduce a larger...

Claims

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Application Information

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IPC IPC(8): C02F5/12C02F5/10
CPCC02F5/10C02F5/12
Inventor 冯婕郦和生胡艳华王岽王亭李博伟
Owner CHINA PETROLEUM & CHEM CORP
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