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Use of a pyran derivative and its preparation method

A technology of pyran derivatives and their uses, which is applied in the fields of uses and preparations of pyran derivatives, can solve the problems of propynyl alcohol polluting the environment, achieve good corrosion inhibition efficiency, improve adsorption capacity, and inhibit corrosion

Active Publication Date: 2021-03-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide the use of a pyran derivative and its preparation method. The pyran derivative solves the problem that the existing corrosion inhibitor propynyl alcohol is volatile and pollutes the environment, and can be used as a corrosion inhibitor to inhibit the corrosion of the steel surface. Corrosion, which is friendly to the environment and society, low toxicity and harmless

Method used

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  • Use of a pyran derivative and its preparation method
  • Use of a pyran derivative and its preparation method
  • Use of a pyran derivative and its preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0045] A method for preparing pyran derivatives, the method comprising:

[0046] In a 50m round bottom flask, add 4-methoxybenzaldehyde / benzaldehyde / 4-nitrobenzaldehyde (1mmol), malononitrile (1mmol) and dimedone (1mmol), and 25mL of water and catalyst piperpene Pyridine (2 drops), mix them evenly, stir at room temperature for 30-45 minutes, collect the formed precipitate by filtration, and recrystallize with ethanol to obtain the pyran derivative AP-1.

Embodiment 2

[0048] A preparation method of pyran derivatives, the method is basically the same as Example 1, the difference is that 4-methoxybenzaldehyde is replaced by 4-methylbenzaldehyde.

Embodiment 3

[0050] A preparation method of pyran derivatives, the method is basically the same as Example 1, the difference is that 4-methoxybenzaldehyde is replaced by 4-ethylbenzaldehyde.

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Abstract

The invention discloses application and a preparation method of a pyran derivative. The pyran derivative serves as a corrosion inhibitor, has a structure shown as a formula (1), and in the formula (1), R comprises alkyl, alkoxy, nitryl or H. The pyran derivative can serve as the corrosion inhibitor so as to inhibit the corrosion of steel surface, and is adsorbed onto metal surface through different substituent groups, the higher the adsorption capacity on Fe surface is, the higher the corrosion inhibition efficiency is, and the pyran derivative is friendly to the environment and the society and is low in toxicity and harmless.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to the use of a pyran derivative and a preparation method thereof. Background technique [0002] In petroleum production technology, well simulation or acidizing is commonly used, in which an acidic solution is introduced into the well under high pressure. The introduced acid chemically reacts with rocks (usually calcite, limestone, and dolomite), mud solids, and sediments, and expands by dissolving the rocks and creating new pores, resulting in enhanced oil recovery. In the acidification process, hydrochloric acid (HCl) with a concentration of 15% is most commonly used due to economy. [0003] However, the addition of acid will cause corrosion of oil well pipelines. Adding a corrosion inhibitor to the acid can prevent acid corrosion by adsorbing on the steel surface, and prevent the acid from directly contacting the casing and pipe steel. Literature review shows that the organic compounds...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/04C07D311/74
CPCC07D311/74C23F11/04
Inventor 辛格
Owner SOUTHWEST PETROLEUM UNIV
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