Acidizing corrosion inhibitor and preparation method thereof

A technology of acidifying corrosion inhibitor and catalyst, which is applied in the fields of chemical instruments and methods, organic chemistry, earthwork drilling, etc., can solve the problems of poor corrosion inhibition effect, poor acid solubility and water solubility, etc. Remarkable etching effect and simple production process

Inactive Publication Date: 2014-08-20
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The currently used acidifying corrosion inhibitors are mainly imidazoline quaternary ammonium salts, aldehyde and ketone amine compounds, quinoline quaternary ammonium salts and pyridine quaternary ammonium salts, etc., all of which have poor corrosion inhibition effects, especially acid solubility and water solubility. Waiting for defects

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

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preparation example Construction

[0029] The preparation method of the acidified corrosion inhibitor comprises the following steps:

[0030] (1) the initiator, the catalyst and the halogenated propylene oxide are uniformly mixed at 20°C to 40°C, and reacted for 5 hours to 10 hours to obtain the reaction product;

[0031] (2) adding a quinoline derivative to the reaction product obtained in step (1) and mixing evenly, condensing and refluxing at 120°C to 180°C for 8 hours to 10 hours, to prepare the acidified corrosion inhibitor;

[0032] The mass ratio of the initiator, catalyst, halogenated propylene oxide and quinoline derivative is 2~4:1~2:50~100:10~30, preferably 2.5~3:1~1.5:50~80 : 25 to 30.

[0033] The initiator is an alcohol, preferably a mixture of one or more of methanol, ethanol, isopropanol, ethylene glycol, propylene glycol and glycerol, more preferably ethylene glycol.

[0034] The catalyst is a mixture of one or more of boron trifluoride, tetrahydrofuran, phosphorus hexafluoride, triethyl oxys...

Embodiment 1

[0039] The preparation method of the acidified corrosion inhibitor comprises the following steps:

[0040] (1) the initiator, the catalyst and the halogenated propylene oxide are uniformly mixed at 20° C. and reacted for 5 hours to obtain the reaction product;

[0041] (2) adding a quinoline derivative to the reaction product obtained in step (1) and mixing uniformly, condensing and refluxing at 120° C. for 8 hours to obtain product A, that is, preparing the acidified corrosion inhibitor;

[0042] The mass ratio of the initiator, catalyst, halogenated propylene oxide and quinoline derivative is 2:1:50:10.

[0043] The initiator is methanol; the catalyst is boron trifluoride diethyl ether; the halogenated propylene oxide is epibromopropane; and the quinoline derivative is quinoline.

Embodiment 2

[0045] The preparation method of the acidified corrosion inhibitor comprises the following steps:

[0046] (1) the initiator, the catalyst and the halogenated propylene oxide are uniformly mixed at 30 ° C and reacted for 7 hours to obtain the reaction product;

[0047] (2) adding a quinoline derivative to the reaction product obtained in step (1) and mixing uniformly, condensing and refluxing at 160° C. to obtain product B, that is, preparing the acidified corrosion inhibitor;

[0048] The mass ratio of the initiator, the catalyst, the halogenated propylene oxide and the quinoline derivative is 4:1:50:25.

[0049] The initiator is ethylene glycol; the catalyst is triethoxy salt; the halogenated propylene oxide is epiiodopropane; the quinoline derivative is quinoline.

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Abstract

The invention discloses an acidizing corrosion inhibitor and a preparation method thereof. The structural general formula of the acidizing corrosion inhibitor is as shown in formula (I), and the preparation method comprises the steps of (1) uniformly mixing an initiator, a catalyst and halogenated epoxypropane, and carrying out ring opening polymerization reaction at 20-40 DEG C; and (2) adding quinoline into the reaction product of step (1) and mixing uniformly, condensing and back flowing for 8-10 hours at 120-180 DEG C, and carrying out quaterisation reaction so as to prepare the acidizing corrosion inhibitor, wherein the mass ratio of the initiator to the catalyst to the halogenated epoxypropane to the quinoline is (2-4):(1-2):(50-100):(10-30). The corrosion inhibitor has the characteristics of good water solubility, less use level, good corrosion inhibition and the like.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical industry, and more particularly relates to an acidified corrosion inhibitor and a preparation method thereof. Background technique [0002] In the acidizing process, the injection of acid may cause surface pitting, hydrogen embrittlement and weightless corrosion of metal equipment, and sometimes may lead to sudden equipment rupture accidents, resulting in serious economic losses. Therefore, in order to prevent acidification, casing, tubing, etc. Corrosion of equipment, adding acidified corrosion inhibitor to acid solution to slow down corrosion. [0003] As early as 1885, the American Petroleum Development Corporation proposed the concept of using oil well acidification technology to stimulate crude oil production. However, in production practice, due to the severe corrosion of oil wells by hydrochloric acid, this acidification stimulation technology was forced to stop using, and finally fail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/54C07D215/10C07D215/26C07D215/227C07D215/233C08G65/333
CPCC09K8/74C07D215/10C07D215/227C07D215/233C07D215/26C08G65/33317C08G2650/50C09K8/725C09K2208/32
Inventor 付朝阳李强王江顺何金杯李小敏
Owner HUAZHONG UNIV OF SCI & TECH
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