Preparation method of corrosion inhibitor for novel ionic liquid oil field water

A technology of ionic liquids and corrosion inhibitors, which is applied in the field of synthetic oilfield water injection compound corrosion inhibitors, can solve the problems of rapid corrosion of oilfield reinjection water pipelines, and achieve the effects of increasing activation energy, reducing corrosion speed, and slowing down corrosion

Active Publication Date: 2015-04-08
TANGSHAN NORMAL UNIV
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

Used to solve the problem of rapid corrosi

Method used

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  • Preparation method of corrosion inhibitor for novel ionic liquid oil field water
  • Preparation method of corrosion inhibitor for novel ionic liquid oil field water
  • Preparation method of corrosion inhibitor for novel ionic liquid oil field water

Examples

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example 1

[0036] Example 1: Synthesis of [Bmim]Br

[0037] Weigh 32ml of N-methylimidazole solution and 44ml of n-bromobutane solution and add them into a three-neck flask equipped with a reflux condenser. A calcium chloride drying tube is installed on the reflux condenser. Heat and stir the mixture at 70°C. It was reacted for 24h, cooled to room temperature, and the crude product was obtained. Then put the crude product into a separatory funnel, wash with about 30mL of ethyl acetate each time, wash twice in total, remove the ethyl acetate by rotary evaporation, dry in vacuum at 60°C for 24h, and keep the weight constant to obtain a light yellow viscous The liquid [Bmim]Br was 76.53g, and the yield was 85.11%. The reaction equation is as follows:

[0038]

[0039] To simulate the composition of oilfield reinjection water quality, add 0.0003623molNaSO to 1L of water 4 , 0.00815molK 2 SO 4 , 0.01923molCaCl 2 , 0.01143molMgCl 2 , 0.001655molMgSO 4 , 0.0035gNa 2 S, 0.0000417mol ...

example 2

[0041] Measure 8 mL of N-methylimidazole and 12 mL of benzyl chloride into a three-necked flask equipped with a reflux condenser, heat and stir the mixture at 70 °C to react for 20 h, cool to room temperature, and separate layers to obtain a crude product. Then put the crude product into a separatory funnel, wash it twice with about 60 mL of ethyl acetate, and remove the ethyl acetate by rotary evaporation to obtain a brown viscous liquid a. Weigh 16.00 g of compound a and 16.50 g of NaBF 4 The mixture was added to a three-necked flask equipped with a reflux condenser, 100 mL of water was added as a solvent, the mixture was heated and stirred at 70 °C to react for 20 h, and the water was removed by rotary evaporation after the reaction. Dry in vacuum at 60°C for 24h to obtain a light brown liquid. The reaction equation is as follows:

[0042]

[0043] To simulate the composition of oilfield reinjection water quality, add 0.0003623molNaSO to 1L of water 4 , 0.00815molK 2 ...

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Abstract

The invention relates to a synthetic oilfield flooding compounded corrosion inhibitor which takes imidazole type ionic liquid synthesized by a two-step method as a controlled-release host and the other added compounds as auxiliary controlled-release agents. A preparation method of the corrosion inhibitor for the novel ionic liquid oil field water comprises the following steps: (1) at a certain temperature, mixing N-methylimidazole with n-butyl bromide or benzyl chloride, reacting while stirring, washing and removing unreacted substances after reaction is carried out for hours, thus obtaining halide of N-methylimidazole; (2) mixing the product obtained in the step (1) with a selected compound, adding a solvent, stirring for reacting for a period of time at a certain temperature, extracting a reaction solution, washing, and removing the solvent, thus obtaining the target products; and (3) compounding the products obtained in the step (2) with urotropine, OP-10, potassium iodide and thiourea in a certain proportion, thus obtaining the corrosion inhibitor with extremely high corrosion inhibition efficiency. The preparation method of the corrosion inhibitor for the novel ionic liquid oil field water has the advantages that raw materials are simple and available, the operational process is easy and safe, the reaction time is short, the cost is low, the yield is high, the corrosion inhibition performance is strong, the corrosion inhibitor for the novel ionic liquid oil field water is applicable to industrial large-scale production, and the practicability is strong.

Description

technical field [0001] The present invention relates to a kind of synthetic oilfield water injection compound slow-release agent which uses N-methylimidazole as starting material, imidazole-type ionic liquid synthesized by two-step method as slow-release main agent, and several other compounds as auxiliary slow-release agents. etchant. Background technique [0002] At present, there are many kinds of corrosion inhibitors for oilfield water in China, such as aminotrimethylene phosphonic acid (ATMP), hydroxyethylidene diphosphonic acid (HEDP), polyol phosphate, benzotriazole (BTA), formazan Benzotriazole (TTA), polyacrylic acid, SL-1, SL-2, polymaleic anhydride, amine molybdate, SR-1025, IMC-50-S, sodium lignosulfonate and other varieties. Although there are many varieties, the main agents of many varieties are the same, such as imidazoline and its derivatives, fatty amines and their derivatives, amides, Mannich bases, organic acid esters, organic amines, quaternary ammonium ...

Claims

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Application Information

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IPC IPC(8): C23F11/14C23F11/16
Inventor 蔡明建赵贵
Owner TANGSHAN NORMAL UNIV
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