A kind of fluorine-containing cationic imidazoline corrosion inhibitor and preparation method thereof

A technology of imidazoline corrosion inhibitors and cations, which is applied in the field of fluorine-containing cation imidazoline corrosion inhibitors and its preparation, can solve problems such as the adverse effects of corrosion inhibition rate and the influence of popularization and application of imidazoline corrosion inhibitors, and achieve good mitigation Erosion rate, not easy to fall off, and the effect of reducing interfacial tension

Active Publication Date: 2011-12-14
陕西日新石油化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although imidazoline compounds have a certain effect in preventing metal corrosion, the above-mentioned imidazoline compounds have certain shortcomings in terms of corrosion inhibition efficiency, high temperature resistance, water solubility, hydr

Method used

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  • A kind of fluorine-containing cationic imidazoline corrosion inhibitor and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Organic carboxylic acid and diethylene triamine are added into the reactor according to the molar ratio of 1:0.1 to obtain the reactant, and the organic carboxylic acid is saturated or unsaturated C 1 -C 22 Monohydric aliphatic organic carboxylic acids, the saturated or unsaturated C 1 -C 22 The monobasic aliphatic organic carboxylic acid is oleic acid, and benzene solvent is added in the reactant, and the mass ratio of reactant and benzene solvent is 1: 0.1, and described benzene solvent is xylene, after adding benzene solvent, heat and React at 130°C for 0.5h, then heat up and perform cyclization reaction at 190°C for 0.5h, cool to 80°C after the cyclization reaction, add perfluoroalkylsulfonyl fluoride, perfluoroalkylsulfonyl fluoride and organic carboxylic acid dropwise after cooling The molar ratio is 1:0.1, the perfluoroalkyl sulfonyl fluoride is perfluorobutyl sulfonyl fluoride, after the perfluoroalkyl sulfonyl fluoride is added dropwise, the reaction is kept ...

Embodiment 2

[0022] Add organic carboxylic acid and diethylenetriamine into the reactor according to the molar ratio of 1:2 to obtain the reactant, the organic carboxylic acid is saturated or unsaturated C 1 -C 22 Monohydric aliphatic organic carboxylic acids, the saturated or unsaturated C 1 -C 22 Monohydric aliphatic organic carboxylic acid is stearic acid, add benzene solvent in reactant, the mass ratio of reactant and benzene solvent is 1: 2, described benzene solvent is m-xylene, heat after adding benzene solvent And react at 165°C for 5h, then heat up and perform cyclization reaction at 210°C for 5h, cool to 110°C after the cyclization reaction, drop perfluoroalkylsulfonyl fluoride, perfluoroalkylsulfonyl fluoride and organic carboxylic acid The molar ratio is 1:2, the perfluoroalkyl sulfonyl fluoride is perfluorohexyl sulfonyl fluoride, the perfluoroalkyl sulfonyl fluoride is added dropwise and then incubated for 5 hours, and the quaternizing reagent, quaternary ammonium The mola...

Embodiment 3

[0024] Add organic carboxylic acid and diethylenetriamine into the reactor according to the molar ratio of 1:0.4 to obtain the reactant, the organic carboxylic acid is saturated or unsaturated C 1 -C 22 Monohydric aliphatic organic carboxylic acids, the saturated or unsaturated C 1 -C 22 The monobasic aliphatic organic carboxylic acid is coconut oil acid, add benzene solvent in the reactant, the mass ratio of reactant and benzene solvent is 1: 0.4, and described benzene solvent is p-xylene, heat after adding benzene solvent And react at 140°C for 1.5h, then raise the temperature and perform cyclization reaction at 195°C for 1.5h, cool to 85°C after the cyclization reaction, add perfluoroalkylsulfonyl fluoride dropwise after cooling, perfluoroalkylsulfonyl fluoride and organic The molar ratio of the carboxylic acid is 1:0.4, the perfluoroalkylsulfonyl fluoride is perfluorooctanesulfonyl fluoride, after the perfluoroalkylsulfonyl fluoride is added dropwise, the reaction is kep...

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Abstract

The invention provides a fluorine-containing cationic imidazoline corrosion inhibitor and a preparation method thereof. The method comprises the following steps: adding an organic carboxylic acid and diethylenetriamine into a reactor in a molar ratio of 1:(0.1-2); adding a benzene solvent, heating, and performing a reaction at the temperature of 130-165 DEG C; heating, and performing a cyclization reaction at the temperature of 190-210 DEG C; cooling to 80-110 DEG C after the cyclization reaction; dripping perfluoroalkglsulfonyl fluoride after cooling, and performing a thermostatic reaction; and dripping a quaternizing reagent after the thermostatic reaction, and performing a thermostatic reaction to prepare the fluorine-containing cationic imidazoline corrosion inhibitor. The corrosion inhibitor is a rufous sticky liquid and can be miscible with water in any proportion, wherein the flash point is more than 60 DEG C, the condensation point is less than minus 10 DEG C, and the density is between 0.86g/ml and 0.99g/ml. The fluorine-containing cationic imidazoline corrosion inhibitor has the advantages of good metal surface adsorption, easily formed oleophobic metal surface, less possibility of dropping and the like, and can be used for reducing the friction of organic media, such as crude oil, finished product oil and the like, to a vessel surface.

Description

technical field [0001] The invention relates to an imidazoline corrosion inhibitor and a preparation method thereof, in particular to a fluorine-containing cationic imidazoline corrosion inhibitor and a preparation method thereof. Background technique [0002] In recent years, imidazoline compounds are one of the fastest-growing organic corrosion inhibitors. Its molecular structure contains a nitrogen five-membered heterocycle. A monomolecular film is formed on the surface to change the oxidation-reduction potential of hydrogen ions to achieve the purpose of corrosion inhibition. [0003] At present, domestic reports on imidazoline corrosion inhibitors include: Wang Jianhua, Shu Fuchang, etc. use diethylenetriamine, triethylenetetramine, polyethylenepolyamine, oleic acid, benzyl chloride, chloroacetic acid, and absolute ethanol as raw materials. , to synthesize a series of imidazoline derivative corrosion inhibitors. Zhu Xun, Zhou Xiuqin and others synthesized cycloalkylim...

Claims

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Application Information

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IPC IPC(8): C23F11/14
Inventor 张光华刘国俊李俊国房瑜红朱军峰
Owner 陕西日新石油化工有限公司
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