Preparation method and application of multifunctional polyamine amide for oil field

A polyamine amide, multifunctional technology, applied in the field of polyamine amide, can solve the problems of weak effect, easy to form gel or carbon deposition, low polarity of alkyl main chain, etc., to reduce the impact, reduce thermal stability, inhibit the The effect of crystal growth

Active Publication Date: 2012-05-09
西安利奇材料科技有限公司
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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

[0014] A preparation method for multifunctional polyamide for oil field, comprising the following steps:

[0015] The first step is to dissolve the long-chain fatty amides prepared from natural oils and polyethylene polyamines in an organic solvent with 10 times the mass in a container. The natural oils are soybean oil, and the polyethylene polyamines are of industrial grade and above purity Diethylenetriamine, the organic solvent is toluene above chemical purity,

[0016] In the second step, add a cross-linking agent to the container under stirring, the amount of the cross-linking agent added is 0.5 times of the amount of the diethylenetriamine substance, and the cross-linking agent is paraformaldehyde of industrial grade and above purity,

[0017] In the third step, the reactants in the container were stirred and heated at 100°C for 4 hours, cooled to room temperature,

[0018] In the fourth step, the organic solvent in the light yellow solution obtained in the container is...

Embodiment 2

[0021] A preparation method for multifunctional polyamide for oil field, comprising the following steps:

[0022] The first step is to dissolve the long-chain fatty amides prepared from natural oils and polyethylene polyamines in an organic solvent with 10 times the mass in a container. The natural oils are rapeseed oil, and the polyethylene polyamines are of industrial grade and above purity triethylenetetramine, the organic solvent is xylene above chemical purity,

[0023] In the second step, add a crosslinking agent to the container under stirring, the amount of the crosslinking agent added is 0.5 times the amount of the triethylenetetramine substance, and the crosslinking agent is hexamethylenetetramine of industrial grade and above purity,

[0024] In the third step, the reactants in the container were stirred and heated at 120°C for 4 hours, and then cooled to room temperature.

[0025] In the fourth step, the organic solvent in the light yellow solution obtained in the...

Embodiment 3

[0028] A preparation method for multifunctional polyamide for oil field, comprising the following steps:

[0029] The first step is to dissolve the long-chain fatty amides prepared from natural oils and polyethylene polyamines in an organic solvent with 20 times the mass in a container. The natural oils are soybean oil, and the polyethylene polyamines are industrial grade and above purity Tetraethylenepentamine, the organic solvent is cyclohexane above chemical purity,

[0030] In the second step, under stirring, a cross-linking agent is added to the container, and the amount of the cross-linking agent added is 0.6 times that of the tetraethylenepentamine substance, and the cross-linking agent is n-butyraldehyde of industrial grade and above purity,

[0031] In the third step, the reactants in the container were stirred and heated at 60°C for 4 hours, then cooled to room temperature,

[0032] In the fourth step, the organic solvent in the light yellow solution obtained in the...

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PUM

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Abstract

The invention relates to a preparation method of multifunctional polyamine amide for an oil field. The preparation method comprises the steps of: firstly dissolving long-chain fatty acyl polyamine prepared from long-chain fatty acid and polyethylene polyamine in an organic solvent in a container, adding a cross-linking agent to the container under stirring, stirring and heating reactants in the container, and cooling to room temperature to finally obtain a light yellow solution, namely a polyamine amide solution in the container; or evaporating the organic solvent from the light yellow solution obtained in the container to obtain light yellow waxy solid, namely polyamine amide. In application, polyamine amide is dissolved in an organic solvent to prepare a solution, the solution is added to crude oil to obtain a mixture, when the solidifying point of the crude oil is reduced by 5-25 DEG C and the viscosity of the crude oil is reduced by 30-80%, the mixture is prepared into an aqueous solution with mass concentration of 100-10000 ppm, and the corrosion inhibition of the aqueous solution is measured to obtain that the corrosion inhibition rate of the aqueous solution to the steel sheets in different concentrations of hydrochloric acid is 40-90%.

Description

technical field [0001] The invention relates to the technical field of polyamine amide, in particular to a preparation method and application of multifunctional polyamine amide for oil fields. 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 polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/22C08G73/02C09K8/588C09K8/52
Inventor 陈刚张洁汤颖
Owner 西安利奇材料科技有限公司
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