Acidizing corrosion inhibitor and preparation method thereof

A technology of acidifying corrosion inhibitor and concentrated hydrochloric acid, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of poor compatibility between corrosion inhibitor and acid solution, and the corrosion inhibition performance cannot meet the requirements of use, and achieves good performance. Economic and environmental benefits, reducing construction risks, and good corrosion inhibition performance

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an acidifying corrosion inhibitor to solve the problems of poor compatibil...

Method used

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  • Acidizing corrosion inhibitor and preparation method thereof
  • Acidizing corrosion inhibitor and preparation method thereof
  • Acidizing corrosion inhibitor and preparation method thereof

Examples

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Embodiment 1

[0023] The acidifying corrosion inhibitor of the present embodiment is made from the following raw materials in parts by weight: 40 parts of acetophenone, 24 parts of formaldehyde, 10 parts of ethylenediamine, 24 parts of absolute ethanol, and a mass concentration of 32% concentrated hydrochloric acid 1 2 parts, 2 parts of propargyl alcohol.

[0024] The preparation method of the acidifying corrosion inhibitor of the present embodiment comprises the following steps:

[0025] 1) At room temperature, place acetophenone, formaldehyde, absolute ethanol and concentrated hydrochloric acid in a reaction kettle equipped with an electric stirrer, a return water condenser, and a constant temperature heating device, and stir for 12 minutes to obtain mixture A;

[0026] 2) Add ethylenediamine into the reaction kettle, close the reaction kettle, open the return water condenser and the electric stirrer, raise the temperature of the reaction kettle to 80°C, and react the ethylenediamine with...

Embodiment 2

[0029] The acidifying corrosion inhibitor of the present embodiment is made from the following raw materials in parts by weight: 39 parts of acetophenone, 24 parts of formaldehyde, 9 parts of ethylenediamine, 24 parts of absolute ethanol, and a mass concentration of 36% concentrated hydrochloric acid 1 1 part, propargyl alcohol 1 part.

[0030] The preparation method of the acidifying corrosion inhibitor of the present embodiment comprises the following steps:

[0031] 1) At room temperature, place acetophenone, formaldehyde, absolute ethanol and concentrated hydrochloric acid in a reaction kettle equipped with an electric stirrer, a return water condenser, and a constant temperature heating device, and stir for 10 minutes to obtain a mixture A;

[0032] 2) Add ethylenediamine into the reaction kettle, close the reaction kettle, open the return water condenser and the electric stirrer, raise the temperature of the reaction kettle to 80°C, and react the ethylenediamine with the...

Embodiment 3

[0035] The acidifying corrosion inhibitor of the present embodiment is made from the following raw materials in parts by weight: 41 parts of acetophenone, 26 parts of formaldehyde, 11 parts of ethylenediamine, 26 parts of absolute ethanol, and 2 parts of concentrated hydrochloric acid with a mass concentration of 33%. 1 part, propargyl alcohol 1 part.

[0036] The preparation method of the acidifying corrosion inhibitor of the present embodiment comprises the following steps:

[0037] 1) At room temperature, place acetophenone, formaldehyde, absolute ethanol and concentrated hydrochloric acid in a reaction kettle equipped with an electric stirrer, a return water condenser, and a constant temperature heating device, and stir for 15 minutes to obtain mixture A;

[0038] 2) Add ethylenediamine into the reaction kettle, close the reaction kettle, open the return water condenser and the electric stirrer, raise the temperature of the reaction kettle to 80°C, and react the ethylenedi...

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Abstract

The invention discloses an acidizing corrosion inhibitor and a preparation method, the acidizing corrosion inhibitor comprises the following raw materials by weight: 39-41 parts of acetophenone, 24-26 parts of formaldehyde, 9-11 parts of ethene diamine, 24-25 parts of absolute ethyl alcohol, 1-2 parts of concentrated hydrochloric acid, and 1-3 parts of propiolic alcohol. The acidifying corrosion inhibitor employs acetophenone, formaldehyde, absolute ethyl alcohol, concentrated hydrochloric acid, ethene diamine and propiolic alcohol as raw materials, through reasonable complex formulation, the acidifying corrosion inhibitor has good dispersibility in an acid solution, any synergist and surfactant is not required for realizing good compatibility of the acid solution and other acidifying additives; rust inhibition performance is good, the first grade standard in an industry can be reached, no damage is generated to rock core during an acidifying process; influence of the acidizing corrosion inhibitor is little to human body and environment, so that acidifying construction cost is reduced, on-site construction security is increased, the corrosion inhibitor has good economic benefit and environment benefit, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of oil field chemical industry, and in particular relates to an acidification corrosion inhibitor, and also relates to a preparation method of the acidification corrosion inhibitor. Background technique [0002] In the process of oilfield development, fracturing and acidizing technology is the main transformation measure for oil well stimulation and water well injection. Almost all oil and water wells need to go through this process. The fracturing technology is the first choice to increase production capacity, so acidizing and acid fracturing have become indispensable measures in the process of increasing production and efficiency of oilfields in various countries. In the process of acidizing and acid fracturing, high-concentration acid liquid will inevitably corrode metals, especially when the acid liquid is in a flowing state and the temperature at the bottom of the well is high, the acid liquid will corr...

Claims

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Application Information

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IPC IPC(8): C09K8/74
CPCC09K8/74
Inventor 许惠林司玉梅贾跃立杨琪张燕利陈雪梅
Owner CHINA PETROLEUM & CHEM CORP
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