Amphiphilic polymer oil-displacing agent with biquaternary ammonium salt long chain structure and preparation method of amphiphilic polymer oil-displacing agent

A technology of amphiphilic polymer and biquaternary ammonium salt, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of small branching degree and low charge density of polymer molecules, and achieves large branching degree. , The effect of good hydrophobic site and good apparent viscosity

Active Publication Date: 2019-04-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The hydrophobic branching of the above-mentioned amphiphilic polymer is usually to introduce one or two hydrophobic carbon chains on the ter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Amphiphilic polymer oil-displacing agent with biquaternary ammonium salt long chain structure and preparation method of amphiphilic polymer oil-displacing agent
  • Amphiphilic polymer oil-displacing agent with biquaternary ammonium salt long chain structure and preparation method of amphiphilic polymer oil-displacing agent
  • Amphiphilic polymer oil-displacing agent with biquaternary ammonium salt long chain structure and preparation method of amphiphilic polymer oil-displacing agent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1 Synthesis of double-branched cationic hydrophobic monomer

[0051] Weigh according to n (hexadecyl dimethyl tertiary amine): n (cis-1,4-dichloro-2-butene) = 2.1:1, dissolve in ethanol, pour it into a three-necked flask and stir evenly. The temperature was raised to 60°C and reacted for 19 hours. Distill the pale yellow product under reduced pressure, add acetone and place it at 3°C ​​for 3 hours, cool to crystallize, filter with suction, wash, and dry to obtain CC 16 -DMBAC's white powder.

Example Embodiment

[0052] Example 2 Synthesis method of amphiphilic polymer oil-displacing agent with double quaternary ammonium salt long-chain structure

[0053] Combine AM and CC synthesized in Example 1 16 -DMBAC was added to a 39°C three-necked flask at a molar ratio of 98:2, added a certain mass of distilled water (monomer mass fraction is 20%) and stirred evenly, bubbling in nitrogen for 15 minutes, heating to 41°C, adding 0.05% mass of the total monomer After the reaction is completed, the product is repeatedly washed, purified, and dried in acetone to obtain the long-chain structure amphiphilic polymer DMAPMA with a yield rate of 86.34%.

[0054] Synthetic route such as figure 1 Shown:

[0055] Example 3 Characterization and performance of the amphiphilic polymer oil-displacing agent with long-chain structure of double quaternary ammonium salt in Example 2

[0056] 1. Infrared characterization of oil displacing agent:

[0057] Using infrared spectrometer (NICOLET 6700, USA) to compare the synth...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the field of tertiary oil recovery, and particularly relates to an amphiphilic polymer oil-displacing agent with a biquaternary ammonium salt long chain structure and a preparation method of the amphiphilic polymer oil-displacing agent. For the technical problem that the salt resistance of an oil-displacing agent adopted in the prior art is frequently poor, the oil-displacing agent with good salt resistance, viscosifying action and shear resistance is provided. Firstly, N,N-dimethylhexadecylamine and cis-1,4-dichloro-2-butene are taken as raw materials to synthesize adouble-branched cationic hydrophobic monomer N,N'-bis(hexadecyl dimethyl)-1,2-chloride-2-butene-ammonium salt (CC16-DMBAC), then the CC16-DMBAC and acrylic amide (AM) perform copolymerization, a cationic group and a hydrophobic long chain are introduced onto an acrylic amide main chain, so that polymer molecules form a three-dimensional network structure with a certain strength by virtue of a hydrophobic interaction function among the molecules, and the oil-displacing agent has viscosifying action and good shear resistance and salt resistance.

Description

technical field [0001] The invention belongs to the field of tertiary oil recovery, in particular to an amphiphilic polymer oil displacement agent with a double quaternary ammonium salt long-chain structure and a preparation method thereof. Background technique [0002] Polymer flooding is a mature and widely used tertiary oil recovery method, mainly through the viscosification of polymers to increase the viscosity of the injected fluid, reduce the water-oil mobility ratio, and increase the sweep coefficient to achieve the purpose of enhancing oil recovery. Oil displacement polymers generally have good solubility, good viscosification and are stable in reservoir conditions. At present, the commonly used polymer in the oil field is partially hydrolyzed polyacrylamide (HPAM), but there are certain limitations in the application process of HPAM, such as the poor salt resistance of HPAM, in high-salt (salinity higher than 10000mg / L) conditions Under these conditions, the salt-s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K8/588C08F220/56C08F226/02
CPCC08F220/56C09K8/588C08F226/02
Inventor 杨红斌康万利陈超张弘文张向峰周博博王芳赵晗李欣欣
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap