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Diethyleneamine-(2-benzotriazole)-(2′-long carbon chain alkenyl) bis-imidazoline corrosion inhibitor and preparation method

A technology of benzotriazole and diethyleneamine, applied in the preparation of the corrosion inhibitor, in the field of diethyleneamine-bisimidazoline corrosion inhibitor, achieves stable performance, strong synergistic effect, and rapid heating uniform effect

Inactive Publication Date: 2019-10-22
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the promotion of ethanol gasoline, the gap between the supply and demand of fuel ethanol will show an expanding trend; while developing fuel ethanol, in order to ensure food security, the National Development and Reform Commission clearly stated in the "Renewable Energy Mid- and Long-term Development Plan" that no more food will be used. Production capacity of fuel ethanol as raw material, reasonable use of non-grain biomass raw materials to produce fuel ethanol, coal-based ethanol may usher in development opportunities

Method used

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  • Diethyleneamine-(2-benzotriazole)-(2′-long carbon chain alkenyl) bis-imidazoline corrosion inhibitor and preparation method
  • Diethyleneamine-(2-benzotriazole)-(2′-long carbon chain alkenyl) bis-imidazoline corrosion inhibitor and preparation method
  • Diethyleneamine-(2-benzotriazole)-(2′-long carbon chain alkenyl) bis-imidazoline corrosion inhibitor and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 20mL of xylene, 39.76g (0.21mol) of tetraethylenepentamine and 11.92g (0.1mol) of 4-carboxybenzotriazole into a 250mL four-neck round bottom flask, and then put it into a built-in magnetic stirrer In the MCR-3S microwave chemical reactor of the device, adjust the three-stage temperature control program, turn on the microwave chemical reactor, first maintain the reaction at a microwave power of 100W and a temperature of 75-78°C for 6 minutes, and then slowly add 31.13g (0.1 mol) 11-eicosenoic acid, heat up to 130-135°C after the addition, reflux for 35 minutes at a microwave power of 250W, then heat up to 165-170°C, and reflux for 20 minutes at a microwave power of 500W Minutes, a reddish-brown liquid was obtained, cooled, and the xylene was recovered by rotary evaporation under vacuum to obtain a brown viscous liquid——(1,1′-diethyleneamine)-(2-benzotriazole)-(2′ -10-nonadecenyl) bis-imidazoline corrosion inhibitor, its structural formula is as follows:

[0020] ...

Embodiment 2

[0022] Add 20mL of xylene, 43.51g (0.229mol) of tetraethylenepentamine and 11.45g (0.096mol) of 4-carboxybenzotriazole into a 250mL four-neck round bottom flask, and then put it into a built-in magnetic stirrer In the MCR-3S microwave chemical reactor of the device, adjust the three-stage temperature control program, turn on the microwave chemical reactor, first maintain the reaction at a microwave power of 100W and a temperature of 70-73°C for 8 minutes, and then slowly add 25.26g (0.099 mol) 2-hexadecenoic acid, heat up to 120-125°C after adding, reflux for 32 minutes under microwave power of 250W, then heat up to 170-175°C, and depressurize and reflux for 20 minutes under microwave power of 500W Minutes, a reddish-brown liquid was obtained, cooled, and the xylene was recovered by rotary evaporation under vacuum to obtain a brown viscous liquid——(1,1′-diethyleneamine)-(2-benzotriazole)-(2′ -pentadecenyl) bisimidazoline corrosion inhibitor, its structural formula is as follow...

Embodiment 3

[0025] Add 20mL of xylene, 40.82g (0.216mol) of tetraethylenepentamine and 11.59g (0.097mol) of 4-carboxybenzotriazole into a 250mL four-neck round bottom flask, and then put it into a built-in magnetic stirrer In the MCR-3S microwave chemical reactor of the device, adjust the three-stage temperature control program, turn on the microwave chemical reactor, first maintain the reaction at a microwave power of 100W and a temperature of 72-75°C for 5 minutes, and then slowly add 28.33g (0.101 mol) 9,12-octadecadienoic acid, heat up to 135-140°C after addition, reflux for 38 minutes under microwave power of 250W, then heat up to 175-180°C, depressurize under microwave power of 500W Reflux for 28 minutes to obtain a reddish-brown liquid, cool it, and recover xylene by vacuum rotary evaporation to obtain a brown viscous liquid—(1,1′-diethyleneamine)-(2-benzotriazole)- (2′-8,11-heptadecadienyl) bis-imidazoline corrosion inhibitor, its structural formula is as follows:

[0026]

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Abstract

The invention discloses a diethyleneamine-(2-benzotriazole)-(2'-long carbon chain alkylene)bis-imidazoline corrosion inhibitor and a preparation method thereof. A structural formula of the corrosion inhibitor is shown in the description, wherein R represents monoalkenyl or bialkenyl with the carbon chain number of C7 to C23; the corrosion inhibitor is prepared by taking tetraethylenepentamine, 4-carboxy benzotriazole and long carbon chain carboxylic acid as raw materials and xylol as a water carrying agent, and carrying out amidation reaction and cyclization reaction under a microwave condition through a normal-pressure reflowing and decompression and reflowing two-step temperature raising method; and the preparation method has the characteristics of short reaction time, rapid and uniformheating, high efficiency, strong penetrability, easiness for separating a product and the like. According to the corrosion inhibitor disclosed by the invention, a benzotriazole group is introduced into a structure so that the corrosion inhibition effect on copper is enhanced; and the corrosion inhibitor can be used for alleviating corrosion of coal-produced ethanol gasoline to the copper, and alsocan be applied to an acidic medium or oilfield produced water containing CO2 and H2S so as to alleviate the corrosion to carbon steel.

Description

technical field [0001] The invention belongs to the technical field of petroleum product additives, and in particular relates to a diethyleneamine-(2-benzotriazole)-(2′-long carbon chain alkene group) bis-imidazoline buffer which can be used for coal-based ethanol gasoline Corrosion agent, and the preparation method of this corrosion inhibitor. Background technique [0002] On September 13, 2017, 15 departments including the National Development and Reform Commission, the National Energy Administration, and the Ministry of Finance jointly issued the "Implementation Plan on Expanding the Production of Biofuel Ethanol and Promoting the Use of Ethanol Gasoline for Vehicles", specifying that by 2020, in the country Promote the use of ethanol gasoline for vehicles within the scope, and basically achieve full coverage. At present, more than 40 countries and regions have promoted biofuel ethanol and ethanol gasoline for vehicles. Promoting the use of ethanol gasoline for vehicles ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D405/14C23F11/14
Inventor 李俊莉张颖程雯黄婷任海晶王晓晖
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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