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Corrosion-inhibition drag reducer for alkyl porphyrin compound natural gas pipelines and preparation method of corrosion-inhibition drag reducer

A technology of porphyrin compounds and alkyl porphyrins, applied in pipeline systems, organic chemistry, mechanical equipment, etc., can solve the problems of complicated operation, increase the potential accident rate, reduce the actual application effect, etc., and achieve good drag reduction and anti-corrosion performance. Effect

Active Publication Date: 2012-12-26
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is often necessary to inject different types of additives multiple times, the operation is complicated, and the potential accident rate is increased, and there is mutual inhibition between various additives, which greatly reduces the actual application effect

Method used

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  • Corrosion-inhibition drag reducer for alkyl porphyrin compound natural gas pipelines and preparation method of corrosion-inhibition drag reducer
  • Corrosion-inhibition drag reducer for alkyl porphyrin compound natural gas pipelines and preparation method of corrosion-inhibition drag reducer
  • Corrosion-inhibition drag reducer for alkyl porphyrin compound natural gas pipelines and preparation method of corrosion-inhibition drag reducer

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 200ml propionic acid into a 1000ml three-necked flask, heat to a slight boiling state and add benzaldehyde and 4-hydroxybenzaldehyde, the molar ratio of benzaldehyde and 4-hydroxybenzaldehyde is 1:1, the volume of benzaldehyde and propionic acid Ratio is 1:40, form benzaldehyde and 4-hydroxybenzaldehyde mixed solution after stirring rapidly and fully dissolving; Pyrrole is dissolved in propionic acid, is made into the solution of 10vol l.%, under stirring condition, the propionic acid solution of pyrrole Slowly drop into the mixed solution of benzaldehyde and 4-hydroxybenzaldehyde, the molar ratio of benzaldehyde to pyrrole is 1:2. Heat the mixture to 125°C, reflux and stir to react for 1 hour, then cool to 65°C under stirring, add absolute ethanol, the volume ratio of benzaldehyde to ethanol is 1:20, stir and cool to room temperature, and let it stand in an ice bath. Set aside for 12 hours; suction filter the reaction mixture 5 times, and wash the filter cake with ...

Embodiment 2

[0028] Add 200ml propionic acid into a 1000ml three-necked flask, heat to a slight boiling state and add benzaldehyde and 4-hydroxybenzaldehyde, the molar ratio of benzaldehyde and 4-hydroxybenzaldehyde is 1:1, the volume of benzaldehyde and propionic acid Ratio is 1:40, form benzaldehyde and 4-hydroxybenzaldehyde mixed solution after stirring rapidly and fully dissolving; Pyrrole is dissolved in propionic acid, is made into the solution of 10vol l.%, under stirring condition, the propionic acid solution of pyrrole Slowly drop into the mixed solution of benzaldehyde and 4-hydroxybenzaldehyde, the molar ratio of benzaldehyde to pyrrole is 1:2. Heat the mixture to 125°C, reflux and stir to react for 1 hour, then cool to 65°C under stirring, add absolute ethanol, the volume ratio of benzaldehyde to ethanol is 1:20, stir and cool to room temperature, and let it stand in an ice bath. Set aside for 12 hours; suction filter the reaction mixture 5 times, and wash the filter cake with ...

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Abstract

The invention relates to a corrosion-inhibition drag reducer for alkyl porphyrin compound natural gas pipelines of and a preparation method of the corrosion-inhibition drag reducer. The preparation method comprises the steps as follows: firstly, benzaldehyde, 4-hydroxyl benzaldehyde and pyrrole are used as raw materials to be reacted so as to prepare the mixture of six kinds of porphyrin compounds (H); then, the mixture H of the porphyrin compounds is reacted with acrylic acid long-chain alkyl esters to prepare six kinds of alkyl orphyrin compounds, wherein each kind of the compounds is 15 to 20wt%; and the prepared compounds are dissolved in 30 to 50wt% of solvent prepared with p-dioxane so as to form the corrosion-inhibition type drag reducer for the alkyl porphyrin compound natural gas pipelines. The proportion is that the mole ratio of methanal to the 4-hydroxyl benzaldehyde is (0.8:1) to (1.2:1); the mole ratio of the benzaldehyde to the pyrrole is (0.8:2) to (1.2:2); and the mole ratio of the acrylic acid long-chain alkyl esters to the pyrrole synthetizing H is (1:1) to (2:1). The drag reducer provided by the invention has the advantages of good drag reduction and anticorrosion property.

Description

technical field [0001] The invention relates to an alkyl porphyrin compound-like corrosion-inhibiting drag reducer for natural gas pipelines and a preparation method thereof, and relates to the general method of organic chemistry, the anticorrosion of general metal materials and the technical fields of pipeline systems. Background technique [0002] Due to the unbalanced distribution of global oil and gas resources and the large regional differences in demand, a huge storage and transportation system is needed to connect oil and gas resources from the production site to the user. Once oil and gas transportation is blocked, oil and gas consumption areas and production areas will cause huge economic loss. Natural gas is the least polluting and cleanest energy source, so its proportion in primary energy is increasing rapidly, and the burden on the natural gas pipeline network is increasing day by day. In various regions at home and abroad, the demand for natural gas varies gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D487/22F17D1/02
Inventor 郭海峰刘玮莅杨法杰刘诚代晓东李春漫常维纯高艳清张志恒李国平
Owner PIPECHINA SOUTH CHINA CO
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