Gas-liquid two-phase palmitic acid-based imidazoline corrosion inhibitor and its preparation and use method

A technology of palmitic acid-based imidazoline and corrosion inhibitor, which is applied in the field of oil and gas field chemistry, can solve the problems of difficulty in inhibiting the corrosion of the top of oil and gas pipes, difficult to inhibit liquid phase corrosion of oil and gas pipes, and difficult to prevent corrosion, and achieves great economic and social benefits, The effect of inhibiting metal corrosion and forming dense film

Active Publication Date: 2019-05-10
陕西森瑞石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the liquid phase corrosion at the bottom of the pipeline, adding a liquid phase corrosion inhibitor with better effect can achieve good results; but for the gas phase, it is difficult for the traditional single liquid phase corrosion inhibitor to achieve the purpose of anticorrosion, and it is difficult to inhibit the corrosion of oil and gas pipelines. Corrosion at the top of the oil and gas pipeline, and it is difficult to inhibit the liquid phase corrosion at the bottom of the oil and gas pipeline with a single gas phase corrosion inhibitor

Method used

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  • Gas-liquid two-phase palmitic acid-based imidazoline corrosion inhibitor and its preparation and use method
  • Gas-liquid two-phase palmitic acid-based imidazoline corrosion inhibitor and its preparation and use method
  • Gas-liquid two-phase palmitic acid-based imidazoline corrosion inhibitor and its preparation and use method

Examples

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Embodiment 1

[0032] This embodiment provides a gas-liquid two-phase palmitic acid-based imidazoline corrosion inhibitor, which includes a main agent, several auxiliary agents and a solvent, and is formed by mixing the main agent, auxiliary agents and solvents.

[0033] The main agent is an imidazoline derivative prepared from palmitic acid, polyethylene polyamine, and a water-carrying agent; the auxiliary agent includes isopropanol, aminoethyl acid, and diglycolamine; and the solvent is ethanol. In this embodiment, preferably, polyethylene polyamine is selected from triethylenetetramine; water carrier is selected from xylene.

[0034] The present embodiment provides the preparation method of this gas-liquid biphasic palmitic acid base imidazoline corrosion inhibitor, comprises the following steps:

[0035] Step 1, the preparation of imidazoline derivatives

[0036] Put 100kg of the raw material triethylenetetramine and 100kg of the water-carrying agent xylene into the reactor, start stirr...

Embodiment 2

[0044] On the basis of Example 1, this example provides a preferred formulation of a gas-liquid biphasic palmitic acid-based imidazoline corrosion inhibitor. In terms of weight percent, the proportion of the feeding amount of each component is: palmitic acid 240kg, 110kg of triethylenetetramine, 120kg of water-carrying xylene; 100kg of isopropanol, 100kg of aminoethyl acid, 50kg of diglycolamine; 280kg of solvent ethanol.

[0045] For the preparation method and application method of the gas-liquid biphasic palmitic acid-based imidazoline corrosion inhibitor, see Example 1. The difference from Example 1 is that the gas-liquid biphasic palmitic acid-based imidazoline corrosion inhibitor is used at a concentration of 150 mg / L.

Embodiment 3

[0047] On the basis of Example 1, this example provides a preferred formulation of a gas-liquid biphasic palmitic acid-based imidazoline corrosion inhibitor. In terms of weight percent, the proportion of the feeding amount of each component is: palmitic acid 250kg, 120kg of triethylenetetramine, 150kg of water-carrying xylene; 120kg of isopropanol, 100kg of aminoethyl acid, 50kg of diglycolamine; 210kg of solvent ethanol.

[0048] For the preparation method and application method of the gas-liquid biphasic palmitic acid-based imidazoline corrosion inhibitor, see Example 1. The difference from Example 1 is that the gas-liquid biphasic palmitic acid-based imidazoline corrosion inhibitor is used at a concentration of 200 mg / L.

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Abstract

The invention belongs to the field of chemical technology of oil and gas fields and discloses a gas-liquid bi-phase palmitic acid-based imidazoline corrosion inhibitor. The corrosion inhibitor comprises a main agent, a plurality of auxiliary agents and a solvent, wherein the main agent is an imidazoline derivative prepared from palmitic acid, polyethylene polyamine and an azeotropic agent; the auxiliary agents include isopropanol, aminoethyl acid and diglycolamine; and ethanol is selected as the solvent. Based on percentage by weight, the ratio of the components is as follows: 22%-25% of palmitic acid, 10%-12% of polyethylene polyamine, 10%-15% of azeotropic agent, 8%-12% of isopropanol, 10% of aminoethyl acid, 5% of diglycolamine and 21%-35% of solvent. The palmitic acid-based corrosion inhibitor belongs to the oil-soluble water dispersible type, is stable and easily soluble, good in compatibility with other chemical agents, strong in adsorptivity on the metal surface, small in usage amount, capable of effectively inhibiting corrosion of H2S, CO2 and salinity brine to an oil casing and suitable for oil and gas production, gathering and transportation and has great economic benefits and social benefits, and formed films are compact.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field chemistry, and specifically relates to a gas-liquid two-phase palmitic acid-based imidazoline corrosion inhibitor, and a method for preparing and using the phyloline corrosion inhibitor, which is mainly used for inhibiting H in gas wells. 2 S, CO 2 , Salinity corrosion environment for production tubing, casing corrosion. Background technique [0002] Hydrogen sulfide (H 2 S), carbon dioxide (CO 2 ) Corrosion under the combined action. These two acidic gases have a strong corrosive effect on downhole oil casing and other steel materials in a humid environment, mainly manifested in electrochemical corrosion, stress corrosion cracking, and hydrogen bubbling. Corrosion types include uniform corrosion, local corrosion, pitting corrosion, crevice corrosion, etc. Among them, electrochemical corrosion is an important cause of oil casing damage. [0003] With the development of gas fields, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/54C23F11/02C23F11/14
CPCC23F11/02C23F11/14
Inventor 张蕊玲李莉花张凯
Owner 陕西森瑞石油技术开发有限公司
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