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Preparation method of multifunctional oxyamide for oil field and application thereof

A hydroxyamide and multifunctional technology, which is applied in the field of preparation of multifunctional hydroxyamides for oilfields, can solve the problems of weak action, low polarity of the main chain of the alkyl group, easy gelation or carbon deposition, etc., to reduce the impact and heat Stability, improve the effect of drag reduction

Inactive Publication Date: 2014-03-26
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in practical applications, such as: the thermal stability of the main chain of the alkyl group is strong, and it is difficult to decompose into short-chain compounds in the refining stage after adding crude oil, and it is easy to form gel or carbon deposits; the long-chain alkyl group in the polymer The side has a structure similar to the wax in crude oil, and is easy to eutectic or adsorb with it. The polar part of the polymer plays the role of distorting the crystal nucleus, dispersing the wax crystal or inhibiting the further growth of the wax crystal, but the alkyl The polarity of the main chain is small and the effect is weak, relying on the twisted crystal nucleus of the ester group or amide group on the side chain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of multifunctional hydroxyamide for oil field comprises the following steps:

[0016] The first step, add natural oil and polyethylene polyamine and the organic solvent of 5 times of quality of former two total mass in reactor, wherein the mass ratio of natural oil and polyethylene polyamine is 5:1, and natural oil is commercially available Rapeseed oil, polyethylene polyamine is technical grade ethylenediamine, and described organic solvent is technical grade methyl alcohol;

[0017] Second step, in above-mentioned reaction system, add the alkali of 0.1% of natural oil and ethylenediamine mass fraction sum as catalyst, described alkali is the sodium hydroxide of industrial grade;

[0018] The third step is to heat and reflux at 60°C for 10 hours under stirring, and cool to room temperature to obtain a long-chain fatty amide solution derived from natural oil;

[0019] The 4th step, under agitation, add hydroxylation reagent in reaction kettle, th...

Embodiment 2

[0023] The preparation method of multifunctional hydroxyamide for oil field comprises the following steps:

[0024] The first step, add natural oil and polyethylene polyamine and the organic solvent of 8 times of quality of preceding two total mass in reactor, wherein the mass ratio of natural oil and polyethylene polyamine is 4:1, and natural oil is commercially available Soybean oil, polyethylene polyamine is diethylene triamine, and the organic solvent is technical grade ethanol;

[0025] Second step, in above-mentioned reaction system, add the alkali of 0.2% of natural oil and diethylenetriamine mass fraction sum as catalyst, described alkali is the potassium hydroxide of industrial grade;

[0026] The third step is to heat and reflux at 78°C for 8 hours under stirring, and cool to room temperature to obtain a long-chain fatty amide solution derived from natural oil;

[0027] The fourth step, under stirring, add a hydroxylating reagent to the reaction kettle, the amount o...

Embodiment 3

[0031] The preparation method of multifunctional hydroxyamide for oil field comprises the following steps:

[0032] The first step, add natural oil and polyethylene polyamine and the organic solvent of 10 times of quality of former two total mass in reactor, wherein the mass ratio of natural oil and polyethylene polyamine is 3.5:1, and natural oil is commercially available Cottonseed oil, polyethylene polyamine is triethylene tetramine, and described organic solvent is propanol of industrial grade;

[0033] Second step, in above-mentioned reaction system, add the alkali of 0.3% of natural oil and triethylene tetramine mass fraction sum as catalyst, described alkali is chemically pure sodium hydroxide;

[0034] The third step is to heat and reflux at 97°C for 4 hours under stirring, and cool to room temperature to obtain a long-chain fatty amide solution derived from natural oil;

[0035] The fourth step, under stirring, add a hydroxylating reagent to the reaction kettle, the ...

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PUM

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Abstract

The invention discloses a preparation method of multifunctional oxyamide for an oil field and an application thereof. Long-chain fatty acid amide is prepared by taking natural oil as a raw material, and then oxyamide is prepared through an addition reaction by taking an aldehyde compound as a hydroxylation reagent. The oxyamide is used as a crude oil additive, so that the viscosity and condensation point of the crude oil can be reduced; meanwhile, through the coordination of nitrogen and oxygen atoms with metal, the oxyamide is adsorbed to the metal surface and forms an organic protection layer to realize a corrosion inhibition effect.

Description

technical field [0001] The invention relates to the technical field of hydroxyamides, in particular to a preparation method and application of multifunctional hydroxyamides for oilfields. Background technique [0002] Polymers with long alkyl side chains and comb-shaped polymers are an important class of polymers, such as polyacrylic high carbon alcohol ester, polyacrylic acid high carbon amine amide, polymaleic acid high carbon alcohol ester, polymaleic acid high carbon amine Copolymers of amides and their monomers or copolymers with monomers such as styrene and vinyl acetate, etc. This type of polymer can be used as a pour point depressant for high-point crude oil, a viscosity depressant for high-viscosity crude oil, a wax inhibitor for crude oil, a drag reducer for crude oil transportation, and other oilfield chemicals. At present, the main chain of this type of polymer used is a long alkyl chain, which functions as connecting side chains of monomers to form a polymer. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58C09K8/524C08G12/22C23F11/04
CPCC09K8/524C08G12/22C09K8/54C23F11/173
Inventor 陈刚张洁苏慧君宋莹盼赵巍
Owner XI'AN PETROLEUM UNIVERSITY
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