Method for preparing efficient acid-proof corrosion inhibiter

A corrosion inhibitor and high-efficiency technology, applied in the field of preparation of high-efficiency acid-resistant corrosion inhibitor, can solve the problems of poor anti-corrosion effect, inability to meet device anti-corrosion and high cost, and achieve the effects of low cost, good anti-corrosion effect and mild reaction conditions

Inactive Publication Date: 2014-08-06
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing anti-acid corrosion inhibitors have a series of problems such ...

Method used

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  • Method for preparing efficient acid-proof corrosion inhibiter
  • Method for preparing efficient acid-proof corrosion inhibiter
  • Method for preparing efficient acid-proof corrosion inhibiter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Add ethanol, formic acid and N-methylaniline to the reactor, stir evenly, then heat up to 70°C;

[0027] (2) Add acetophenone in the reactor, and drop formaldehyde simultaneously, then react 5h;

[0028] (3) add benzyl chloride in the reactor again, in reaction 3h;

[0029] (4) Stop heating, cool down to room temperature naturally, then add propynyl alcohol into the reactor, and stir evenly to obtain an acid-resistant corrosion inhibitor.

[0030] In step (1), the mass percentages of ethanol, formic acid and N-methylaniline are 30%, 10%, and 5%, respectively.

[0031] In step (2), the mass fraction percentage of adding acetophenone is 20%. The adding mass percent of formaldehyde is 10%.

[0032] In step (3), the mass percentage of benzyl chloride added is 20%.

[0033] In step (4), the mass percentage of propynyl alcohol added is 5%.

Embodiment 2

[0035] (1) Add ethanol, formic acid and N-methylaniline to the reactor, stir evenly, then heat up to 90°C;

[0036] (2) Add acetophenone in the reactor, and drop formaldehyde simultaneously, then react for 3h;

[0037] (3) add benzyl chloride in the reactor again, in reaction 1h;

[0038] (4) Stop heating, cool down to room temperature naturally, then add propynyl alcohol into the reactor, and stir evenly to obtain an acid-resistant corrosion inhibitor.

[0039] In step (1), the mass percentages of ethanol, formic acid and N-methylaniline are 40%, 5%, and 15%, respectively.

[0040] In step (2), the mass percentage of acetophenone added is 10%. The adding mass percent of formaldehyde is 15%.

[0041] In step (3), the mass percentage of benzyl chloride added is 10%.

[0042] In step (4), the mass percentage of propynyl alcohol added is 5%.

Embodiment 3

[0044] (1) Add ethanol, formic acid and N-methylaniline to the reactor, stir evenly, then heat up to 80°C;

[0045] (2) Add acetophenone in the reactor, and drop formaldehyde simultaneously, then react for 4h;

[0046] (3) add benzyl chloride in the reactor again, in reaction 2h;

[0047] (4) Stop heating, cool down to room temperature naturally, then add propynyl alcohol into the reactor, and stir evenly to obtain an acid-resistant corrosion inhibitor.

[0048] In step (1), the mass percentages of ethanol, formic acid and N-methylaniline are 36.6%, 8.7%, and 10%, respectively.

[0049] In step (2), the mass percentage of acetophenone added is 14.2%. The adding mass percent of formaldehyde is 12%.

[0050] In step (3), the mass percentage of benzyl chloride added is 14.4%.

[0051] In step (4), the mass percentage of propynyl alcohol added is 4.1%.

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Abstract

The invention discloses a method for preparing an efficient acid-proof corrosion inhibiter. The preparing method comprises the following specific steps: (1), adding ethanol, methanoic acid and N-methylaniline in a reactor, uniformly agitating, and then heating and raising the temperature to 70-90DEG C; (2), adding acetophenone into the reactor, simultaneously dropping in formaldehyde, and then, reacting for 3-5h; (3) adding benzyl chloride into the reactor and reacting for 1-3h; (4) stopping heating, naturally cooling to a room temperature, then adding propargyl alcohol into the reactor, and uniformly mixing to obtain the acid-proof corrosion inhibiter. The method for preparing the efficient acid-proof corrosion inhibiter has the advantages of mild reaction conditions and simple preparing technology. The acid-proof corrosion inhibiter prepared by the method has great corrosion resisting effect, is at a low cost, and has significant social and economic meanings after popularization and application.

Description

technical field [0001] The invention relates to the technical field of chemistry and chemical engineering, in particular to a preparation method of a high-efficiency acid-resistant corrosion inhibitor. Background technique [0002] Corrosion inhibitors are chemical substances or compounds that can prevent or slow down the corrosion of materials when they exist in the environment (medium) in an appropriate concentration and form, so corrosion inhibitors can also be called corrosion inhibitors. Its dosage is very small (0.1% ~ 1%), but the effect is remarkable. This method of protecting metals is called corrosion inhibitor protection. Corrosion inhibitors are used in neutral medium (boiler water, circulating cooling water), acidic medium (hydrochloric acid for removing scale, acid leaching solution for rust removal of plated parts before electroplating) and gaseous medium (gas phase corrosion inhibitor). [0003] At present, during the process of processing high-acid crude o...

Claims

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Application Information

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IPC IPC(8): C23F11/04
Inventor 程丽华潘奇于湘童汉清杨鑫莉梁亮
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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