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Application of pyridine compound for preparing acidization corrosion inhibitors

A technology for acidizing corrosion inhibitors and compounds, which is applied to the application of N-R-pyridine quaternary ammonium chloride in the preparation of acidifying corrosion inhibitors, and the application of pyridine compounds as acidifying corrosion inhibitors, which can solve the corrosion inhibition effect. Weakening and other problems to achieve the effect of high corrosion inhibition rate

Active Publication Date: 2012-03-21
南京华洲新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The corrosion inhibition effect of existing corrosion inhibitors is significantly weakened under high temperature conditions, especially those above 120°C, and there is an urgent need for a new product that can inhibit the corrosion of acid liquid on downhole pipe strings in high temperature and strong acid

Method used

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  • Application of pyridine compound for preparing acidization corrosion inhibitors
  • Application of pyridine compound for preparing acidization corrosion inhibitors
  • Application of pyridine compound for preparing acidization corrosion inhibitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Pyridine and 9-chloromethylanthracene were reacted at 160°C for 3 hours at a molar ratio of 1:1 to obtain N-(9-anthracenemethyl)pyridine chloride (compound 1). Elemental analysis: C, 78.55; H , 5.27; Cl, ​​11.59; N, 4.58.

[0025] N-(9-anthracenemethyl)pyridine chloride, propynyl alcohol, formaldehyde, and OP-10 were added in isopropanol in a mass ratio of 15:2:12:5, and isopropanol accounted for 66% of the total mass, Obtain corrosion inhibitor product A after stirring.

Embodiment 2

[0027] 2,4 lutidine, 9-chloromethyl anthracene, molar ratio 1:1.1, reacted at 130°C for 5 hours to prepare N-(9-anthracenemethyl)lutidine chloride (compound 2 ) Elemental analysis: C, 79.15; H, 6.04; Cl, ​​10.62; N, 4.20.

[0028] Add N-(9-anthracenemethyl)lutidine chloride, propynyl alcohol, formaldehyde, and Tween-20 into isopropanol in a mass ratio of 20:5:15:10, and isopropanol accounts for the total mass 50% of the corrosion inhibitor product B was obtained after stirring.

Embodiment 3

[0030] 2,4,6 collidine, 9-chloromethyl anthracene, molar ratio 1:1.5, reacted at 180°C for 6 hours to prepare N-(9-anthracenemethyl)collidine chloride ( Compound 3) Elemental analysis: C, 79.41; H, 6.37; Cl, ​​10.19; N, 4.03.

[0031] Add N-(9-anthracenemethyl)collidine chloride, propynyl alcohol, formaldehyde, and Tween-80 into isopropanol in a mass ratio of 30:8:5:15, and isopropanol accounts for the total mass 42% of the corrosion inhibitor product C was obtained after stirring.

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Abstract

The invention provides application of pyridine compound represented by general formula (I) and used for preparing acidization corrosion inhibitors, wherein an R is hydrogen (H) or methyl, and an n is 1, 2 or 3. The invention further relates to application of composite for preparing the acidization corrosion inhibitors, wherein the composite adopts the pyridine compound as a main active ingredient.

Description

technical field [0001] The invention belongs to the technical field of metal anticorrosion, and relates to the application of a pyridine compound as an acidification corrosion inhibitor, in particular to the use of N-(9-anthracenemethyl)R-pyridine quaternary ammonium chloride in the preparation of an acidification corrosion inhibitor The N-(9-anthracenemethyl)R-pyridine quaternary ammonium chloride can prevent acid liquid from corroding metal equipment and downhole tubing strings in oil well acidizing construction. Background technique [0002] Acidizing is one of the effective technical measures for increasing the production of oil and gas wells and water injection wells during the development of carbonate reservoirs. and other dissolution and dissolution, restore and improve the permeability of formation pores and fractures. Hydrochloric acid is a typical non-oxidizing acid, which is highly corrosive to metal pipeline equipment and downhole tubing strings. Accidents such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C07D213/20C07D213/127
Inventor 付朝阳
Owner 南京华洲新材料有限公司
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