CN101367765A - Imidazoline derivant, method of preparing the same, and uses of the same as gas-liquid diphasic inhibitor - Google Patents
Imidazoline derivant, method of preparing the same, and uses of the same as gas-liquid diphasic inhibitor Download PDFInfo
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- CN101367765A CN101367765A CNA2008101402707A CN200810140270A CN101367765A CN 101367765 A CN101367765 A CN 101367765A CN A2008101402707 A CNA2008101402707 A CN A2008101402707A CN 200810140270 A CN200810140270 A CN 200810140270A CN 101367765 A CN101367765 A CN 101367765A
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Abstract
The present invention relates to an imidazoline derivative. The imidazoline derivative is characterized in that the molecular formula is [R-CN2CH2CH2]-(CH2)2-NHCSNH2, wherein, R is C7 to C16 alkyl. The preparation method comprises two steps: firstly, diethylene triamine and 8 to 17 alkyl organic acid are used for synthesizing an intermediate product alkyl imidazoline under the condition with dimethylbenzene; secondly, thiourea is directly added into the intermediate product alkyl imidazoline, and the imidazoline derivative can be synthesized under the identical condition with the dimethylbenzene. The imidazoline derivative can be used as gas-liquid phase corrosion inhibitor which can inhibit corrosion of carbon and steel in the brine with carbon dioxide. The inhibitor is not only suitable for the brine with carbon dioxide of high salinity, but also suitable for the gas phase with carbon dioxide. And the present invention has the advantages that the amount for application is low, the inhibition efficiency is high, the operation for preparation is simple, and the utilization is convenient.
Description
Technical field
The present invention relates to a kind of imidazolidine derivatives and preparation method thereof and as the application of gas, liquid diphasic inhibitor.
Background technology
The history in existing more than 100 year of the use of inhibiter is a kind of easy to use, guard technology that cost is low, often is applicable to that fluid such as pipeline carries.Contain and not only have the liquid phase corrosion in the salt solution of carbonic acid gas, also have gaseous corrosion.The multiple liquid phase inhibiter that is used for containing the salt solution of carbonic acid gas is arranged at present, and its main component has heterogeneous ring compound or organic acid or acid amides etc., and is widely used in oil field extracted water, the transportation pipe road.But, the serious moist gaseous corrosion that above-mentioned these applied environments exist can not be ignored, and be applicable to comparatively high temps simultaneously, gas, the liquid diphasic inhibitor that carbon steel is had a good corrosion mitigating effect that contain in the salt solution (seawater, bittern, underground water, oil field reinjection water, oil gas delivery medium, drilling well/well finishing liquid etc.) of sour gas such as carbonic acid gas do not appear in the newspapers.
Summary of the invention
The object of the present invention is to provide a kind of imidazolidine derivatives and preparation method thereof, and contain gas, liquid diphasic inhibitor in the salt solution of carbonic acid gas as efficient, nontoxic inhibition, can remedy the above-mentioned deficiency of prior art.
A kind of imidazolidine derivatives is characterized in that its molecular formula is [R-CN
2CH
2CH
2]-(CH
2)
2-NHCSNH
2, structural formula is:
R is the alkyl of C7 to C16 in the formula.
The preparation method of above-mentioned imidazolidine derivatives is characterized in that being divided into two steps: the first step, adopt diethylenetriamine and eight yuan to 17 yuan alkyl organic acids to synthesize the intermediate product alkyl imidazoline under the condition that dimethylbenzene exists; Second step directly added thiocarbamide in the intermediate product alkyl imidazoline, synthesize imidazolidine derivatives equally in the presence of dimethylbenzene.
Above-mentioned imidazolidine derivatives in containing the salt solution of carbonic acid gas as the gas of corrosion of carbon steel, the application of liquid diphasic inhibitor.
The high salinity that is not only applicable to inhibiter of the present invention contains in the salt solution of carbonic acid gas, also be applicable in the gas phase that contains carbonic acid gas, and consumption is little, and the inhibition efficiency height, simple to operate during preparation, easy to use.
Embodiment
Imidazolidine derivatives of the present invention synthesizes the first step according to following two steps:
Second step:
R is the alkyl of C7 to C16 in the formula.
Inhibiter of the present invention is based on above-claimed cpd, but do not need to purify.The mixture that obtains during with preparation is made sample as gas, when the liquid diphasic inhibitor experimentizes with the Q235 carbon steel, and specification is 50mm * 10mm * 3mm.Used carbon steel is as usual behind polishing, tap water flushing, alcohol flushing, cold air drying, and is standby after being placed in the moisture eliminator that silica-gel drier is housed 24.Test medium is for feeding the NaCl aqueous solution of saturated carbonic acid gas, and is airtight, 40-80 ℃ of temperature, and the test period is 72h.Weight-loss method is adopted in experiment, respectively three parallel samples is placed on gas phase and liquid phase, obtains the erosion rate in two-phase respectively.This laboratory method is to measure erosion rate according to the changes in weight of sample before and after corrosion.Use following formula to calculate the corrosion inhibition rate of inhibiter in gas, the liquid two-phase respectively:
IE＝(1-V/V
0)×100％
In the formula: the corrosion inhibition rate of IE-inhibiter (%); Erosion rate (the gm of sample behind V-adding inhibiter
-2D
-1); V
0Erosion rate (the gm of sample in the-blank saline
-2D
-1).
Experimental result shows, this inhibiter is 40-80 ℃, normal pressure, contains in the salt solution of carbonic acid gas in temperature, when its total concentration by weight in the 40-100ppm scope, to the vapor phase corrosion inhibitor rate of carbon steel more than 70%; Simultaneously, to the liquid phase corrosion inhibition rate of carbon steel more than 75%.There is not Cavitations on the surface of laboratory sample.
Claims (3)
1. an imidazolidine derivatives is characterized in that its molecular formula is [R-CN
2CH
2CH
2]-(CH
2)
2-NHCSNH
2, structural formula is:
R is the alkyl of C7 to C16 in the formula.
2. the preparation method of the described imidazolidine derivatives of claim 1 is characterized in that being divided into two steps: the first step, adopt diethylenetriamine and eight yuan to 17 yuan alkyl organic acids to synthesize the intermediate product alkyl imidazoline under the condition that dimethylbenzene exists; Second step directly added thiocarbamide in the intermediate product alkyl imidazoline, synthesize imidazolidine derivatives equally in the presence of dimethylbenzene.
The described imidazolidine derivatives of claim 1 in containing the salt solution of carbonic acid gas as the gas of corrosion of carbon steel, the application of liquid diphasic inhibitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101402707A CN101367765A (en) | 2008-09-18 | 2008-09-18 | Imidazoline derivant, method of preparing the same, and uses of the same as gas-liquid diphasic inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101402707A CN101367765A (en) | 2008-09-18 | 2008-09-18 | Imidazoline derivant, method of preparing the same, and uses of the same as gas-liquid diphasic inhibitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101367765A true CN101367765A (en) | 2009-02-18 |
Family
ID=40411791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101402707A Pending CN101367765A (en) | 2008-09-18 | 2008-09-18 | Imidazoline derivant, method of preparing the same, and uses of the same as gas-liquid diphasic inhibitor |
Country Status (1)
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| CN (1) | CN101367765A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101531635B (en) * | 2009-04-02 | 2010-11-17 | 中国海洋大学 | Imidazoline asymmetrical bi-quaternary ammonium salt, method for preparing same and application thereof |
| CN101921233A (en) * | 2010-08-10 | 2010-12-22 | 陕西科技大学 | Tree imidazoline quaternary ammonium salt corrosion inhibitor and preparation method thereof |
| CN102747374A (en) * | 2011-04-22 | 2012-10-24 | 中国石油化工股份有限公司 | Oil-soluble corrosion inhibitor, its preparation method and application |
| CN103789774A (en) * | 2014-01-21 | 2014-05-14 | 山东省泰和水处理有限公司 | Preparation method of imidazoline ramification corrosion inhibitor |
| CN105542737A (en) * | 2015-12-10 | 2016-05-04 | 深圳市创智材料科技有限公司 | Preparation method and application of high-temperature high-pressure corrosion inhibitor capable of resisting corrosion by H2S and CO2 |
| CN108165246A (en) * | 2016-12-08 | 2018-06-15 | 中国石油天然气股份有限公司 | A kind of grease well protection liquid and preparation method |
| CN110105943A (en) * | 2019-06-04 | 2019-08-09 | 中海油常州涂料化工研究院有限公司 | A kind of high-temperature acidification corrosion inhibitor and preparation method thereof |
| CN114622205A (en) * | 2022-03-22 | 2022-06-14 | 河北永创化工科技有限公司 | Neutralization corrosion inhibitor for refinery and preparation method thereof |
-
2008
- 2008-09-18 CN CNA2008101402707A patent/CN101367765A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101531635B (en) * | 2009-04-02 | 2010-11-17 | 中国海洋大学 | Imidazoline asymmetrical bi-quaternary ammonium salt, method for preparing same and application thereof |
| CN101921233A (en) * | 2010-08-10 | 2010-12-22 | 陕西科技大学 | Tree imidazoline quaternary ammonium salt corrosion inhibitor and preparation method thereof |
| CN102747374A (en) * | 2011-04-22 | 2012-10-24 | 中国石油化工股份有限公司 | Oil-soluble corrosion inhibitor, its preparation method and application |
| CN102747374B (en) * | 2011-04-22 | 2014-04-09 | 中国石油化工股份有限公司 | Oil-soluble corrosion inhibitor, its preparation method and application |
| CN103789774A (en) * | 2014-01-21 | 2014-05-14 | 山东省泰和水处理有限公司 | Preparation method of imidazoline ramification corrosion inhibitor |
| CN105542737A (en) * | 2015-12-10 | 2016-05-04 | 深圳市创智材料科技有限公司 | Preparation method and application of high-temperature high-pressure corrosion inhibitor capable of resisting corrosion by H2S and CO2 |
| CN105542737B (en) * | 2015-12-10 | 2019-03-01 | 东莞市智源电子科技有限公司 | Anti- H2S、CO2The preparation method and applications of the high temperature and pressure corrosion inhibiter of corrosion |
| CN108165246A (en) * | 2016-12-08 | 2018-06-15 | 中国石油天然气股份有限公司 | A kind of grease well protection liquid and preparation method |
| CN110105943A (en) * | 2019-06-04 | 2019-08-09 | 中海油常州涂料化工研究院有限公司 | A kind of high-temperature acidification corrosion inhibitor and preparation method thereof |
| CN110105943B (en) * | 2019-06-04 | 2021-07-09 | 中海油常州涂料化工研究院有限公司 | High-temperature acidizing corrosion inhibitor and preparation method thereof |
| CN114622205A (en) * | 2022-03-22 | 2022-06-14 | 河北永创化工科技有限公司 | Neutralization corrosion inhibitor for refinery and preparation method thereof |
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Open date: 20090218 |