High-temperature acidifying inhibiter and preparation method thereof

A technology of acidizing corrosion inhibitor and corrosion inhibitor, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of operator's health damage, unsafe production process, increase of unit consumption of benzyl chloride, etc. Reduce production costs, reduce usage, and avoid the effect of self-condensation

Inactive Publication Date: 2010-02-10
SHOUGUANG YUXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the reaction process, since the formaldehyde is in a sufficient state, it will inevitably cause the volatilization of formaldehyde. Usually, the consumption of formaldehyde is about 0.1255 tons for every ton of corrosion inhibitor produced, which is relatively large and the production cost is high. , the formaldehyde volatilized into the air has caused great damage to the health of the operators, and the production process is unsafe
[0005] In the production process, it is also nece...

Method used

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  • High-temperature acidifying inhibiter and preparation method thereof
  • High-temperature acidifying inhibiter and preparation method thereof
  • High-temperature acidifying inhibiter and preparation method thereof

Examples

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Embodiment 1

[0028] Example 1, take the following raw materials in parts by weight to produce a high-temperature acidification corrosion inhibitor, 79.33 parts of ethanol, 19 parts of formic acid, 22.33 parts of aniline, 31.11 parts of acetophenone, 26.13 parts of formaldehyde, 31.54 parts of benzyl chloride and 8.55 parts of propynyl alcohol share.

[0029] Produce according to the following process steps:

[0030] 1) The raw materials are prepared in parts by weight, and the formaldehyde is prepared into an aqueous solution with a concentration of 30%;

[0031] 2) Place ethanol, formic acid and aniline in the reaction kettle and stir for 8 minutes;

[0032] 3) Add acetophenone into the reaction kettle, raise the temperature of the reaction kettle to 80° C., then add formaldehyde solution to the reaction kettle dropwise, and the dropping time is 20 minutes;

[0033] 4) After adding the formaldehyde solution dropwise, control the temperature of the reactor at 80±0.5°C for 3 hours;

[00...

Embodiment 2

[0039] Embodiment 2, get the raw material production high temperature acidification corrosion inhibitor of following parts by weight, ethanol 83.5 parts, formic acid 20 parts, aniline 23.5 parts, acetophenone 32.75 parts, formaldehyde 27.5 parts, benzyl chloride 33.2 parts and propynyl alcohol 9 share.

[0040] Produce according to the following process steps:

[0041] 1) The raw materials are prepared in parts by weight, and the formaldehyde is prepared into an aqueous solution with a concentration of 30%;

[0042] 2) Place ethanol, formic acid and aniline in the reaction kettle and stir for 12 minutes;

[0043] 3) Add acetophenone into the reaction kettle, raise the temperature of the reaction kettle to 81° C., and then add formaldehyde dropwise to the reaction kettle for 30 minutes;

[0044] 4) After adding formaldehyde dropwise, control the temperature of the reactor at 78±0.5°C for 4 hours;

[0045] 5) Add benzyl chloride into the reactor, and control the temperature o...

Embodiment 3

[0050] Embodiment 3, take the raw material of following parts by weight to produce high-temperature acidification corrosion inhibitor: 87.68 parts of ethanol, 21 parts of formic acid, 24.68 parts of aniline, 34.39 parts of acetophenone, 28.88 parts of formaldehyde, 34.86 parts of benzyl chloride and 9.45 parts of propynyl alcohol share.

[0051] Produce according to the following process steps:

[0052] 1) The raw materials are prepared in parts by weight, and the formaldehyde is prepared into an aqueous solution with a concentration of 30%;

[0053] 2) Place ethanol, formic acid and aniline in the reaction kettle and stir for 18 minutes;

[0054] 3) Add acetophenone into the reaction kettle, raise the temperature of the reaction kettle to 82° C., then add formaldehyde solution dropwise to the reaction kettle, and the dropping time is 40 minutes;

[0055] 4) After adding the formaldehyde solution dropwise, control the temperature of the reactor at 77±0.5°C for 5 hours;

[0...

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Abstract

The invention relates to a high-temperature acidifying inhibiter and a preparation method thereof. The high-temperature acidifying inhibiter comprises the following materials in parts by weight: 79.33-87.68 of ethanol, 19-21 of methanoic acid, 22.33-24.68 of aniline, 31.11-34.39 of acetophenone, 26.13-28.88 of methanal, 31.54-34.86 of benzyl chloride and 8.55-9.45 of propiolic alcohol, wherein theethanol, the methanoic acid and the aniline are placed into a reaction kettle to be stirred; then the acetophenone is added into the reaction kettle; then a methanal solution is dripped into the reaction kettle; the benzyl chloride is added into the reaction kettle after the methanal solution is dripped into the reaction kettle; the temperature of the reaction kettle is reduced to room temperature, and then the propiolic alcohol is added into the reaction kettle to be stirred. The water content inside the reaction kettle is low without adding an aqueous hydrochloric acid solution so as to prevent the benzyl chloride from hydrolyzing and be beneficial to reducing the unit consumption of the benzyl chloride in the quaterisation reaction process; before the methanal is completely dripped, the amount of the methanal dripped into the reaction kettle is less than the reaction mole ratio of synthetic Mannich base, the methanal is in an insufficient state so as to reduce the volatilization ofthe methanal, ensure the health of operators and be safer.

Description

technical field [0001] The invention relates to a high-temperature acidification corrosion inhibitor and a preparation method thereof, which belong to the technical field of oil field chemical industry. Background technique [0002] In oil field construction, fracturing and acidizing is a very important oil production stimulation measure. Almost every oil production well has to go through this process. The commonly used acidizing agent is 20% hydrochloric acid or a compound of hydrochloric acid and hydrofluoric acid. Soil acid, these two acids are very strong inorganic acids, which will lead to corrosion of downhole pipe strings and metal equipment, and with the increase of well depth, the temperature will increase, which will inevitably lead to more serious corrosion. To prevent or reduce the corrosion of downhole tubing string by acid liquid at high temperature, it is necessary to add a high temperature corrosion inhibitor into the acid liquid. [0003] At present, common...

Claims

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Application Information

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IPC IPC(8): C09K8/74
Inventor 杨明冯树海董景福杨磊
Owner SHOUGUANG YUXIN CHEM IND
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