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 kind of technology of corrosion inhibitor and composition, applied in corrosion inhibitor composition, preparation of the foregoing corrosion inhibitor, corrosion inhibitor, application of the foregoing corrosion inhibitor or the foregoing corrosion inhibitor composition in inhibiting water corrosion, circulation In the field of water treatment, it can solve problems such as unfavorable cooling water recycling, and achieve the effect of being difficult to be used by microorganisms, lasting drug effect and good corrosion inhibition effect.

Inactive 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

Examples

Experimental program
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Effect test

preparation example Construction

[0043] At the same time, the present invention also provides a preparation method of a corrosion inhibitor, the preparation method comprising: contacting an aliphatic hydroxycarboxylic acid and / or its salt with an amino acid in water under condensation reaction conditions and in the presence of a catalyst to form The corrosion inhibitor; wherein, the aliphatic hydroxycarboxylic acid has the structure shown in the following formula I; the amino acid has the structure shown in the following formula II,

[0044]

[0045]

[0046] 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 for H, C 1 -C 4 Alkyl, (CH 2 ) n -COOH,CH 2 ) 4 -NH 2 , or CH 2 -OH, wherein n and m are each independently selected from 1 and 2.

[0047] The preparation method of the corrosion inhibitor provided by the present invention forms a water-soluble condensation reaction product by promoting the condensation reaction of the alip...

preparation example 1

[0087] Add 21.8g (0.1mol) of sodium gluconate, 26.6g (0.2mol) of aspartic acid, and 100ml of water into a four-necked flask equipped with a stirrer, a distillation device, and a thermometer, and start stirring to make sodium gluconate and asparagus The acid was fully dissolved and mixed, and then 15.0 g of concentrated sulfuric acid (containing H 2 SO 4 0.15mol). Heat the heating bath (the heating medium is simethicone oil) with the aforementioned flask built in to 100°C, and react for 10 hours. During the reaction, the amount of water evaporated is 30g, and the remaining liquid is cooled to obtain the corrosion inhibitor. This product is designated as S1, It is determined that the solid content of the corrosion inhibitor S1 is 29.5% 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 311-426.

preparation example 2-5

[0089] The preparation method of corrosion inhibitor: refer to the preparation method of corrosion inhibitor in Preparation Example 1, the difference is that the consumption of each raw material is different, and the specific content is shown in the following table:

[0090] Preparation example

[0091] The corrosion inhibitors prepared in Preparation Examples 2-5 are 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 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<7>O<3> as described in the specification. In the formula II, R4 is selected from a group consisting of H, C1-C4 alkyl groups, (CH<2>)<n>-COOH, (CH<2>)<4>-NH<2>, CH<2>-OH or other groups as described in the description, and n and m are independently selected from a group consisting of 1 and 2. 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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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F5/10
CPCC02F5/12C02F5/10
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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