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Acidification compound imidazoline corrosion inhibitor and method for preparing same

A technology of corrosion inhibitor and oxazoline type, which is applied in the field of compound imidazoline type corrosion inhibitor for acidification and its preparation, can solve the problem that compound use cannot achieve the expected effect and the like, and achieves improved acidification effect and natural environment. No harm, the effect of a wide range of raw materials

Inactive Publication Date: 2016-11-09
CNPC BOHAI DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these two types of corrosion inhibitors for acidification are generally used in combination, but sometimes the combination of two types of corrosion inhibitors for acidification cannot achieve the expected effect. Therefore, it is necessary to study new types of corrosion inhibitors suitable for acidification systems. corrosion inhibitor

Method used

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  • Acidification compound imidazoline corrosion inhibitor and method for preparing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 24.5 parts of deionized water and 40 parts of ethanol into the reaction flask, then add 32 parts of imidazoline and 3 parts of dodecyltrimethylammonium bromide into the reaction flask and stir evenly, 40-50 After reacting at ℃ for 0.5h, stop heating, add 0.5 part of polyoxyethylene alkylphenol ether into the reaction bottle, stir evenly and cool to room temperature to obtain a tan transparent liquid, corrosion inhibitor product I.

Embodiment 2

[0017] Add 24 parts of deionized water and 45 parts of propanol into the reaction flask, then add 25 parts of imidazoline and 5 parts of 1-polyaminoethyl-2-undecylimidazoline hydrochloride into the reaction flask successively Stir evenly in the reaction bottle, react at 40-50°C for 0.8h, stop heating, add 1 part of polyoxyethylene alkyl alcohol ether into the reaction bottle, stir evenly and cool to room temperature to obtain a brown transparent liquid, namely the corrosion inhibitor product II.

Embodiment 3

[0019] Add 32.5 parts of deionized water and 30 parts of propanol into the reaction flask, then add 35 parts of imidazoline and 2 parts of 1-polyaminoethyl-2-undecylimidazoline hydrochloride into the reaction flask successively Stir evenly in the reaction flask, react at 40-50°C for 0.6h, stop heating, add 1.5 parts of polyoxyethylene-1,1'dialkyl propynyl alcohol ether to the reaction flask, stir evenly and cool to room temperature to obtain brown Transparent liquid, namely corrosion inhibitor product III.

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Abstract

The invention discloses an acidification compound imidazoline corrosion inhibitor. The acidification compound imidazoline corrosion inhibitor comprises, by weight, 2-5% of cationic surfactants, 25-55% of imidazoline, 0.5-3% of non-ionic surfactants, 30-50% of mutual solvents and the balance water. The acidification compound imidazoline corrosion inhibitor has the advantages that the acidification compound imidazoline corrosion inhibitor is made of the imidazoline, the imidazoline, the cationic surfactants and the non-ionic surfactants are matched with one another to prepare the acidification compound imidazoline corrosion inhibitor, accordingly, raw materials for the acidification compound imidazoline corrosion inhibitor can come from wide sources, the prepared acidification compound imidazoline corrosion inhibitor is low in cost, excellent in corrosion inhibition performance, free of harm to natural environments and safe in use, metal corrosion can be effectively reduced, and acidification effects of the acidification compound imidazoline corrosion inhibitor can be improved; the acidification compound imidazoline corrosion inhibitor is prepared from the raw materials, a method for preparing the acidification compound imidazoline corrosion inhibitor is simple, conditions are easy to control, and accordingly requirements of industrial production can be met.

Description

technical field [0001] The invention relates to the technical field of oil recovery chemical treatment agents, in particular to a compound imidazoline type corrosion inhibitor for acidification and a preparation method thereof. Background technique [0002] Acidizing is to inject acid liquid into the formation through oil and water wells to remove formation blockages, such as ferric oxide, ferrous sulfide, clay, etc., or dissolve formation rocks to restore and improve formation permeability. In order to improve the acidizing effect, many additives are added to the general system, among which corrosion inhibitors are essential, and a small amount of them, about 0.1-1wt%, can greatly reduce metal corrosion; while the acidic solution of the acidified formation needs the buffering agent of the acidic medium. etchant. [0003] Corrosion inhibitors for acidic media are generally divided into two categories: adsorption film type corrosion inhibitors, such as urotropine, alkylamine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/54
CPCC09K8/54C09K2208/32
Inventor 刘音陈世春王红科解洪祥牛增前贾红战王云云
Owner CNPC BOHAI DRILLING ENG
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