Unlock instant, AI-driven research and patent intelligence for your innovation.

an antico 2 Corrosion Gathering Pipeline Corrosion Inhibitor

A technology for gathering pipelines and corrosion inhibitors, applied in the chemical industry, can solve the problems of high price of quinoline quaternary ammonium salt and pyridine quaternary ammonium salt, easy desorption of monocyclic imidazoline derivatives, poor water solubility of derivatives, etc. Good anti-corrosion effect, good water solubility, good inhibitory effect

Active Publication Date: 2020-08-07
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used anti-CO 2 Corrosion inhibitors are mainly imidazoline derivatives, compounded with quinoline quaternary ammonium salt, pyridine quaternary ammonium salt, thiourea and their derivatives to improve the corrosion inhibition performance of imidazoline, but quinoline quaternary ammonium salt and pyridine quaternary ammonium salt The price of ammonium salt is high, and thiourea and its derivatives have different optimal concentrations in different corrosive media. Too high or too low concentrations will promote corrosion, but monocyclic imidazoline derivatives are easy to desorb at high temperatures , causing the corrosion inhibition effect to decrease, and at high CO 2 To achieve a better effect at a lower content, use a larger amount
In recent years, in order to increase the adsorption performance of imidazoline derivatives at high temperature, bicyclic imidazoline derivatives were prepared by the reaction of dimer acid and polyethylene polyamine, and its corrosion inhibition performance is greater than that of monocyclic imidazoline derivatives. However, the poor water solubility of such derivatives greatly affects its application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • an antico <sub>2</sub> Corrosion Gathering Pipeline Corrosion Inhibitor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] Anti-CO of the present invention 2 The preparation method of the corrosion inhibitor is as follows: in terms of mass percentage, 50-60% of bis-imidazoline quaternary ammonium salt, 10-40% of sodium alkyldithiocarbamate and 10-40% of solvent are uniformly mixed.

[0025] The measuring method of corrosion inhibitor corrosion rate in each embodiment among the present invention is: medium composition: Cl -1 :1823.2mg / L, HCO 3 - : 1263.4mg / L, Ca 2+ :116.3mg / L, Mg 2+ : 17.6mg / L, Na + : 1490.1mg / L; Test temperature: 80°C; Test time: 24 hours; Test material: A3 steel. Polish the A3 steel first, then wash it with petroleum ether, acetone and ethanol, dry it, weigh it, put the prepared sample in the autoclave, add 100ppm of the prepared corrosion inhibitor, stir evenly, and put the weighed A3 After the steel is hung into the autoclave and sealed, use high-purity N 2 After deoxygenation for 4 hours, the temperature was raised to 80°C, and high-purity CO 2 and maintain CO ...

Embodiment 1

[0027] The bis-imidazoline quaternary ammonium salt is prepared by the following process: adding oleic acid and diethylenetriamine in a molar ratio of 1:1 to a reactor with a stirring and distillation device in sequence, reacting at 140°C for 5 hours, and then heating at 1°C The temperature was slowly raised to 220°C at a rate of 1 / min, and the temperature was lowered after vacuum dehydration for 6 hours to obtain an imidazoline intermediate. Slowly add sulfuric acid (mass concentration 95%) and epichlorohydrin (the ratio of the amount of substance of imidazoline intermediate, epichlorohydrin and sulfuric acid is 4:2:1) to the imidazoline intermediate at room temperature, 95 ℃ for 13h, lower the temperature to obtain bis-imidazoline quaternary ammonium salt.

[0028] The corrosion inhibitor is composed of the following components by weight percentage: 50% of bis-imidazoline quaternary ammonium salt, 20% of sodium dimethyl dithiocarbamate and 30% of water. The corrosion inhibi...

Embodiment 2

[0030] The bis-imidazoline quaternary ammonium salt is prepared by the following process: adding oleic acid and diethylenetriamine in a molar ratio of 1:1 to a reactor with a stirring and distillation device in sequence, reacting at 150°C for 4 hours, and then heating at 2°C The temperature was slowly raised to 230°C at a rate of 1 / min, and the temperature was lowered after vacuum dehydration for 6 hours to obtain an imidazoline intermediate. Slowly add sulfuric acid (mass concentration 95%) and epichlorohydrin (the ratio of the amount of substance of imidazoline intermediate, epichlorohydrin and sulfuric acid is 4:2:1) to the imidazoline intermediate at room temperature, 100 ℃ for 12h, lower the temperature to obtain bis-imidazoline quaternary ammonium salt.

[0031] The corrosion inhibitor is composed of the following components in weight percentage: 50% of bis-imidazoline quaternary ammonium salt, 20% of sodium diethyldithiocarbamate and 30% of water. The corrosion inhibit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a CO2 corrosion-prevention gathering pipeline corrosion inhibitor. The CO2 corrosion-prevention gathering pipeline corrosion inhibitor comprises the following components by weight percent: 50 to 60 percent of quaternary ammonium bis-imidazoline, 10 to 40 percent of sodium alkyl / aryl dithiocarbamate, and 10 to 40 percent of a solvent. The corrosion inhibitor can effectivelyprotect metal pipelines and equipment in a gathering environment with higher temperature and high CO2 pressure. When in industrialized production and application process, the corrosion inhibitor hasthe characteristics of good anticorrosion effect, less consumption and low cost.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an anti-CO 2 Corrosion Gathering Pipeline Corrosion Inhibitor. Background technique [0002] CO 2 It often exists in oil and gas as a component of natural gas or petroleum-associated gas, using CO 2 Enhanced oil recovery technologies will also reduce CO 2 brought into the crude oil gathering and transportation system, CO 2 After being dissolved in water, it is extremely corrosive to steel, which can cause rapid overall corrosion and severe local corrosion of steel, causing corrosion failure of pipelines and equipment. Oil and gas wells often contain a large amount of calcium, magnesium and barium ions, which are easy to generate carbonates and corrosion products FeCO 3 Deposit together in the form of scale on the surface of pipes and equipment, causing blockage, CO 2 The presence of the presence of the scale will promote the deposition of scale and corrosion products on the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/16
CPCC23F11/16
Inventor 尹成先范磊张娟涛王远付安庆
Owner BC P INC CHINA NAT PETROLEUM CORP