Peparation method for vapor phase inhibitoror metal natural gas gathering and transporting pipeline

A gas-phase corrosion inhibitor and natural gas technology, which is applied in the field of preparation of gas-phase corrosion inhibitors, can solve the problem that the corrosion inhibitor cannot inhibit the corrosion of oil and gas pipelines, and achieves the ability to overcome weak alkalinity, easy availability and low volatility. Effect

Inactive Publication Date: 2013-07-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the invention is to solve the problem that existing corrosion inhibitors cannot deal with high CO 2 The content of oil and gas transmission pipelines plays a role in corrosion inhibition, and a preparation method for gas phase corrosion inhibitors for natural gas metal gathering and transportation pipelines is provided

Method used

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  • Peparation method for vapor phase inhibitoror metal natural gas gathering and transporting pipeline

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specific Embodiment approach 1

[0009] Specific Embodiment 1: This embodiment is a gas-phase corrosion inhibitor used for natural gas metal gathering and transportation pipelines. The gas-phase corrosion inhibitor used for natural gas metal gathering and transportation pipelines is composed of component A and component B. Component B accounts for 300ppm to 500ppm (ppm: one millionth) of the volume of component A, wherein the component A consists of 10% to 20% of N-methyldiethanolamine, 3% ~7% ethanolamine, 1%~3% diethylenetriamine, 0.10%~0.25% imidazole, 0.25%~0.40% 2-octyl alcohol polyoxyethylene ether, 1.00%~1.50% benzotriazole , 0.80%-1.00% quinoline and 68%-80% distilled water; wherein the B component is a sulfonate anionic surfactant.

[0010] Corrosion inhibitors use the amphiphilic properties of organic alcohol amine molecules to have both hydrophilic and hydrophobic properties, and coordinate the slow-release agent with surfactants and diffusing agents to generate interaction forces between their mol...

specific Embodiment approach 2

[0017] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the described sulfonate anionic surfactant is alkylbenzene sulfonate, α-olefin sulfonate, alkyl sulfonate or α-Sulfomonocarboxylate.

specific Embodiment approach 3

[0018] Specific Embodiment Three: This embodiment is a method for preparing a gas-phase corrosion inhibitor used for natural gas metal gathering and transportation pipelines, which is specifically completed according to the following steps:

[0019]1. Preparation of component A: ① Weighing: Weigh 10% to 20% of N-methyldiethanolamine, 3% to 7% of ethanolamine, 1% to 3% of diethylenetriamine, 0.10%~0.25% imidazole, 0.25%~0.40% 2-octyl alcohol polyoxyethylene ether, 1.00%~1.50% benzotriazole, 0.80%~1.00% quinoline and 68%~80% distilled water ; ②, pre-polymerization: first step ① weighed by mass fraction ratio of 10% to 20% of N-methyldiethanolamine, 3% to 7% of ethanolamine, 1% to 3% of diethylenetriamine and 0.10 %~0.25% of imidazole is mixed evenly, and heated and stirred for 2h~4h under the conditions of temperature 90℃~100℃ and stirring speed 100r / min~150r / min to obtain prepolymer; ③, polymerization: first ② Cool the prepared prepolymer to room temperature, and then add 0.25...

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Abstract

The invention discloses a preparation method for the vapor phase inhibitor for a metal natural gas gathering and transporting pipeline, and relates to a vapor phase inhibitor and a preparation method of the vapor phase inhibitor. The problem that the conventional corrosion inhibitor can not perform corrosion inhibition on a pipeline for conveying oil gas with high CO2 content is solved. The method comprises the following steps of: 1. preparing the component A; and 2. mixing, namely adding the component B into the component A for uniform mixing, and standing the mixture at room temperature for certain time, so as to obtain the vapor phase inhibitor for the metal natural gas gathering and transporting pipeline. The method is mainly used for preparing the vapor phase inhibitor for the metal natural gas gathering and transporting pipeline.

Description

technical field [0001] The invention relates to a preparation method of a gas phase corrosion inhibitor. Background technique [0002] CO in recent years 2 Corrosion has become the main form of corrosion in the exploitation of oil and gas fields, and has affected the safe production of the natural gas industry. Corrosion and protection research has become an urgent problem to be solved in the oil and gas industry. Prevent or reduce CO 2 Corrosion of gas and its weakly acidic aqueous solution to metal pipelines in natural gas transmission systems is a current research hotspot. [0003] CO 2 Corrosion due to CO 2 It dissolves in water to form carbonic acid, which reacts with the surface of low carbon steel to cause corrosion. In the past, the methods of preventing corrosion of natural gas gathering and transportation pipelines were mostly the use of high-alloy steel and FRP materials, inner wall coating or lining, and increasing the pH value, etc., and their anti-corrosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/02
Inventor 张春华王智博徐慧芳张文生赵玉波
Owner HARBIN INST OF TECH
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