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A supramolecular composite corrosion inhibitor and preparation method thereof

A composite corrosion inhibitor and supramolecular polymer technology, applied in the field of supramolecular composite corrosion inhibitor and preparation, can solve the problems of loss of human, material and financial resources, affecting the normal development of oil fields, pipeline corrosion, etc., achieving fast dissolution speed and good synergy Corrosion inhibition efficiency and the effect of reducing dosage

Inactive Publication Date: 2015-11-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of changes in the flow rate and pressure of the transported gas, the pipeline is often severely corroded. This phenomenon seriously affects the normal development of the oil field and causes a large loss of human, material and financial resources.

Method used

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  • A supramolecular composite corrosion inhibitor and preparation method thereof
  • A supramolecular composite corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take 100mL of sodium dodecylbenzenesulfonate solution with a concentration of 100mg / L and 100mL of acrylamide solution with cyclodextrin side groups at a concentration of 100mg / L, mix them, stir for 24 hours, and the stirring temperature is 30°C to obtain dodecane Sodium phenyl sulfonate / acrylamide polymer with cyclodextrin side group supramolecular composite corrosion inhibitor. Take 150mL of the above-mentioned supramolecular composite corrosion inhibitor in a beaker, pipette 4.10mL of concentrated sulfuric acid with a mass percentage concentration of 98% into the above-mentioned supramolecular composite corrosion inhibitor solution, stir continuously until uniform, and use a CHI604D electric The chemical workstation tested the corrosion inhibition of carbon steel, and the experimental results showed that its corrosion inhibition efficiency was 87.8%.

Embodiment 2

[0014] Take 100 mL of sodium dodecylbenzenesulfonate solution with a concentration of 100 mg / L and 100 mL of purchased polyacrylamide polymer with a concentration of 100 mg / L, mix them, and stir for 24 hours at a temperature of 30°C. Sodium dodecylbenzenesulfonate / polyacrylamide polymer composite corrosion inhibitor is obtained. Take 150mL of the above-mentioned supramolecular composite corrosion inhibitor in a beaker, pipette 4.10mL of concentrated sulfuric acid with a mass percentage concentration of 98% into the above-mentioned composite corrosion inhibitor solution, stir continuously until uniform, and use a CHI604D electrochemical workstation to The corrosion inhibition of carbon steel was tested, and the experimental results showed that its corrosion inhibition efficiency was 76.4%.

Embodiment 3

[0016] Take 100 mL of acrylamide polymer with cyclodextrin pendant groups at a concentration of 50 mg / L, mix with 100 mL of deionized water, and stir for 24 hours at a temperature of 30°C. A corrosion inhibitor of acrylamide polymer with cyclodextrin side groups is obtained. Take 150mL of the above composite corrosion inhibitor in a beaker, pipette 4.10mL of concentrated sulfuric acid with a mass percentage concentration of 98% into the above supramolecular composite corrosion inhibitor solution, stir continuously until uniform, and use a CHI604D electrochemical workstation to The corrosion inhibition of carbon steel was tested, and the experimental results showed that its corrosion inhibition efficiency was 68.5%.

[0017] It can be seen from the above examples that the supramolecular composite corrosion inhibitor has better synergistic corrosion inhibition efficiency.

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Abstract

The invention relates to a super-molecular compound corrosion inhibitor used for reducing corrosion of metal equipment during the conveying process of natural gas and a preparation method thereof. The super-molecular compound corrosion inhibitor can improve the corrosion inhibition efficiency of the corrosion inhibitor during the conveying process of the natural gas and reduce the using quantity of the corrosion inhibitor. The technical scheme is as follows: the compound corrosion inhibitor comprises a surfactant and a super-molecular polymer, wherein the surfactant uses sodium dodecyl benzene sulfonate, the super-molecular polymer uses acrylamide with a cyclodextrin side group, and the weight ratio of two monomers is 1: 1. The preparation method comprises the following steps of: firstly respectively preparing the two monomers into a sodium dodecyl benzene sulfonate solution with the concentration of 100mg / L and a solution of the acrylamide with the cyclodextrin side group with the concentration of 100mg / L; and then respectively taking 100mL of the two prepared solutions, pouring into a reaction bottle, and reacting at the temperature of 25-40 DEG C for 12-24h under the continuous stirring condition to prepare the super-molecular compound corrosion inhibitor. The compound corrosion inhibitor is simple and convenient in preparation method and mild in conditions, has a better synergistic corrosion inhibition effect and is used in the conveying process of the natural gas.

Description

technical field [0001] The invention relates to a supramolecular composite corrosion inhibitor used for reducing corrosion of metal equipment during natural gas transportation and a preparation method. technical background [0002] In the process of natural gas transportation, corrosion inhibitors are often used, and often a single corrosion inhibitor is used. However, due to the influence of changes in the flow rate and pressure of the transported gas, the pipeline is often severely corroded. This phenomenon seriously affects the normal development of the oil field and causes a large loss of human, material and financial resources. At the same time, the use of a single corrosion inhibitor has disadvantages such as large dosage and single effect, while the development of composite corrosion inhibitors can reduce the dosage of corrosion inhibitors and greatly improve the efficiency of corrosion inhibition. The supramolecular composite corrosion inhibitor has the characterist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/173
Inventor 颜雪玲邹长军秦一别梁慕华
Owner SOUTHWEST PETROLEUM UNIV