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Preparation method for arborescent imidazoline corrosion inhibitor

A technology of imidazoline corrosion inhibitor and oleic acid imidazoline, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of low corrosion inhibition efficiency and slow release efficiency decline, and achieve inhibition Corrosion, steel corrosion inhibition, good slow-release effect

Inactive Publication Date: 2015-07-22
成都石大力盾科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing corrosion inhibitors have low corrosion inhibition efficiency under acidic conditions, especially when the temperature is high, the slow release efficiency drops sharply
Therefore, the existing imidazoline corrosion inhibitors still need to be improved in terms of corrosion resistance in acidic media, such as temperature resistance, structural optimization, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0022] A preparation method of dendritic imidazoline corrosion inhibitor, the method specifically comprises the following steps:

[0023] (1) Dissolve 0.18 mol of methyl acrylate in 15 ml of methanol, add 0.03 mol of tris(2-aminoethyl)amine dropwise under stirring, and use constant pressure dropping funnel for tris(2-aminoethyl)amine Adding dropwise, the dropping rate is controlled at every 5s / drop, after the addition of tris(2-aminoethyl)amine is completed, then feed nitrogen gas and react in the dark for 37h under nitrogen protection, stop the reaction, and remove excess acrylic acid by rotary evaporation methyl ester and solvent methanol to obtain a light yellow viscous crude product, and then use a mixed solution of methanol and dichloromethane as an eluent, wherein the volume ratio of methanol to dichloromethane is 1:20, separated by column chromatography to obtain Pale yellow viscous liquid G0.5 polyamide-amine (PAMAM) 0.01mol;

[0024] (2) Dissolve 0.04mol of diethylen...

preparation Embodiment 2

[0027] A preparation method of dendritic imidazoline corrosion inhibitor, the method specifically comprises the following steps:

[0028] (1) Dissolve 0.24 mol of methyl acrylate in 10 ml of isopropanol, add 0.01 mol of tris(2-aminoethyl)amine dropwise under stirring, and tris(2-aminoethyl)amine is dripped at constant pressure The liquid funnel is added dropwise, and the dropping rate is controlled at every 4s / drop. After the dropwise addition of tris(2-aminoethyl)amine is completed, nitrogen gas is then introduced to react in the dark for 36 hours under the protection of nitrogen gas, and the reaction is stopped. Methyl acrylate and solvent isopropanol to obtain a light yellow viscous crude product, then use a mixed solution of methanol and methylene chloride as eluent, wherein the volume ratio of methanol and methylene chloride is 1:20, pass through the column Chromatographic separation obtained 0.08mol of pale yellow viscous liquid G0.5 polyamide-amine (PAMAM);

[0029] (2...

preparation Embodiment 3

[0032] A preparation method of a dendritic imidazoline corrosion inhibitor. The method specifically comprises the following steps:

[0033] (1) Dissolve 0.12 mol of methyl acrylate in 20 ml of ethanol, add 0.05 mol of tris(2-aminoethyl)amine dropwise under stirring, and use constant pressure dropping funnel for tris(2-aminoethyl)amine Dropping, the dropping rate is controlled at one drop every 8s. After the addition of tris(2-aminoethyl)amine is completed, then nitrogen gas is introduced to react in the dark for 38 hours under the protection of nitrogen gas. The reaction is stopped, and excess methyl acrylate is removed by rotary evaporation. ester and solvent ethanol to obtain a light yellow viscous crude product, and then use a mixed solution of methanol and dichloromethane as an eluent, wherein the volume ratio of methanol and dichloromethane is 1:20, and the light yellow viscous product is separated by column chromatography. Yellow viscous liquid G0.5 polyamide-amine (PAMA...

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Abstract

The invention discloses a preparation method for an arborescent imidazoline corrosion inhibitor. The preparation method comprises the following steps: firstly, carrying out a reaction between methyl acrylate and tris(2-aminoethyl)amine to obtain G0.5 polyamidoamine (PAMAM); secondly, carrying out a reaction between the obtained G0.5 polyamidoamine (PAMAM) and diethylenetriamine to obtain G1 polyamidoamine (PAMAM); finally, carrying out a reaction between the obtained G1 polyamidoamine (PAMAM) and oleic acid to obtain oleic acid imidazoline, namely the arborescent imidazoline corrosion inhibitor. The preparation method has the advantages that the composite arborescent imidazoline corrosion inhibitor has a good slow release effect during antacid medium corrosion; even if the temperature is relatively high, the slow release effect can still be good.

Description

technical field [0001] The invention relates to a preparation method of a dendritic imidazoline corrosion inhibitor. Background technique [0002] Corrosion in acidic environment is a common type of corrosion in the process of oil and gas field development, and imidazoline organic corrosion inhibitors have been widely used in anti-corrosion in acidic medium. However, the existing corrosion inhibitors have low corrosion inhibition efficiency under acidic conditions, especially when the temperature is high, the slow release efficiency drops sharply. Therefore, the existing imidazoline corrosion inhibitors still need to be improved in terms of corrosion resistance in acidic media, such as temperature resistance and structural optimization. Contents of the invention [0003] The purpose of this invention is to provide a kind of preparation method of dendritic imidazoline corrosion inhibitor, the dendritic imidazoline corrosion inhibitor synthesized by the method has a good sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/16C08G83/00C09K8/54C09K8/74C23F11/04
CPCC07D233/16C08G83/00C08G83/004C09K8/54C09K8/74C09K2208/32C23F11/04
Inventor 何毅何泽陈丽郭睿马兰
Owner 成都石大力盾科技有限公司
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