Hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer and preparation method thereof

A six-membered cycloalkylsiloxane and natural gas pipeline technology, which is applied in pipeline systems, chemical instruments and methods, mechanical equipment, etc., can solve the problems of increasing the potential accident rate, reducing the actual application effect, and complicated operation

Active Publication Date: 2013-01-09
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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  • Hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer and preparation method thereof
  • Hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer and preparation method thereof
  • Hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] In a 500ml reaction vessel, dissolve dodecyl (C12) alcohol in n-heptane to make a 50% solution; place the 500ml reaction vessel containing the alcohol-heptane solution in a water circulation cooling tank for continuous Slowly add phosphorus pentoxide to the n-heptane solution of alcohol under stirring condition. The molar ratio of alcohol to phosphorus pentoxide is 3:1. During the reaction, the reaction temperature is always kept below 50°C. After 2 hours of reaction, add Water is added dropwise in the reactant, and the mol ratio of water and phosphorus pentoxide is 2:1, continues to react 2 hours back vacuum distillation product is purified, obtains the MAP product based on dodecyl phosphate monoester; Dialkyl (C12) methyldimethoxysilane is dissolved in n-heptane to form a 50wt.% solution, and then the obtained MAP product is added to the solution. Dodecylmethyldimethoxysilane and MAP The molar ratio is 2.5:1, and after stirring and reacting for 3 hours, a six-membered...

Embodiment 2

[0022] In a 500ml reaction vessel, dissolve octadecyl (C18) alcohol in n-heptane to make a 50% solution; place the 500ml reaction vessel containing the alcohol-heptane solution in a water circulation cooling tank for continuous Slowly add phosphorus pentoxide to the n-heptane solution of alcohol under stirring condition. The molar ratio of alcohol to phosphorus pentoxide is 3:1. During the reaction, the reaction temperature is always kept below 50°C. After 2 hours of reaction, add Water is added dropwise in the reactant, and the mol ratio of water and phosphorus pentoxide is 2:1, continues to react 2 hours and then product is purified by underpressure distillation, obtains the MAP product based on octadecyl phosphate monoester; Octadecylmethyldimethoxysilane is dissolved in n-heptane to form a 50wt.% solution, and then the obtained MAP product is added to the solution. The molar ratio of octadecylmethyldimethoxysilane to MAP The ratio is 2.5:1, and after stirring and reacting ...

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Abstract

The invention relates to a hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer and a preparation method thereof. The preparation method comprises the following steps: reacting raw materials phosphorus pentoxide and long-chain alkyl alcohol in a mol ratio of 2:1-4:1 to generate the product mainly comprising long-chain monoalkyl phosphate (MAP); reacting long-chain alkylmethyl dimethoxysilane and the MAP product in a mol ratio of 2:1-2.5:1 to generate an alkylsiloxane-phosphate product mixture, wherein the content of the hexatomic-ring long alkylsiloxane-phosphate is 80-85 wt.%, and the content of the linear alkylsiloxane-phosphate is 15-20 wt.%; and dissolving the obtained alkylsiloxane-phosphate product mixture in n-heptane to form a 30-50 wt.% solution, thereby obtaining the hexatomic-ring alkylsiloxane-phosphate natural gas pipeline corrosion-inhibition drag reducer. The invention has the advantages of high corrosion inhibition efficiency, high drag reduction rate and long effective period.

Description

technical field [0001] The invention relates to a six-membered cycloalkylsiloxane-phosphate ester 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 natur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6596F17D1/02C23F11/02
Inventor 郭海峰刘诚刘玮莅代晓东杨法杰李春漫常维纯高艳清张志恒李国平
Owner PIPECHINA SOUTH CHINA CO
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