A kind of polymerizable hyperbranched surfactant and preparation method thereof

A surfactant, hyperbranched polymer technology, applied in chemical instruments and methods, drilling compositions, chemical/physical processes, etc. problem, to achieve the effect of low critical micelle concentration, good shear resistance, and significant emulsification effect

Active Publication Date: 2020-01-17
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under high shear conditions, the main chain of the polymer is easy to break, resulting in a decrease in the viscosity of the polymer solution; under high-salt conditions, the main chain of the polymer is easy to "curl", resulting in a decrease in the viscosity of the polymer solution; Increased rate of oxidative degradation, resulting in a decrease in polymer solution viscosity
The decrease in polymer viscosity is directly reflected in the decrease in the growth rate of the sweep coefficient, which ultimately leads to a decrease in the growth rate of the recovery factor.

Method used

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  • A kind of polymerizable hyperbranched surfactant and preparation method thereof
  • A kind of polymerizable hyperbranched surfactant and preparation method thereof
  • A kind of polymerizable hyperbranched surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Preparation of hyperbranched surfactants

[0034] (1) Preparation of intermediates

[0035] Add maleic anhydride, aliphatic amine and chloroform into the three-necked flask according to the molar ratio of 1.05-1.2:1:20, stir for 30 minutes in an ice-water bath, then warm up to room temperature and keep for 2-5 hours until the acid value of the reaction system changes ≤0.5mgKOH / g when the reaction is over. After the reaction is finished, the solvent is evaporated at low temperature, the reaction product is dissolved in acetone to remove excess maleic anhydride, and vacuum-dried to obtain an intermediate of a carboxylic acid amide containing an unsaturated double bond, its structure is shown in formula a;

[0036]

[0037] (2) Preparation of hyperbranched macromolecules

[0038] Add maleic anhydride and diethanolamine into the three-necked flask according to the molar ratio of 1.05-1.2:1, pass N under ice-water bath 2 Under normal circumstances, after stirring f...

Embodiment 2

[0050] 1. Preparation of hyperbranched surfactants

[0051] (1) Preparation of intermediates

[0052] Add maleic anhydride, aliphatic amine and chloroform into the three-necked flask according to the molar ratio of 1.05-1.2:1:20, stir for 30 minutes in an ice-water bath, then warm up to room temperature and keep for 2-5 hours until the acid value of the reaction system changes ≤0.5mgKOH / g when the reaction is over. After the reaction is finished, the solvent is evaporated at low temperature, the reaction product is dissolved in acetone to remove excess maleic anhydride, and vacuum-dried to obtain an intermediate of a carboxylic acid amide containing an unsaturated double bond, its structure is shown in formula a;

[0053]

[0054] (2) Preparation of hyperbranched macromolecules

[0055] Add maleic anhydride and diethanolamine into the three-necked flask according to the molar ratio of 1.05-1.2:1, pass N under ice-water bath 2 Under normal circumstances, after stirring f...

Embodiment 3

[0067] 1. Preparation of hyperbranched surfactants

[0068] (1) Preparation of intermediates

[0069] Add maleic anhydride, aliphatic amine and chloroform into the three-necked flask according to the molar ratio of 1.05-1.2:1:20, stir for 30 minutes in an ice-water bath, then warm up to room temperature and keep for 2-5 hours until the acid value of the reaction system changes ≤0.5mgKOH / g when the reaction is over. After the reaction is finished, the solvent is evaporated at low temperature, the reaction product is dissolved in acetone to remove excess maleic anhydride, and vacuum-dried to obtain an intermediate of a carboxylic acid amide containing an unsaturated double bond, its structure is shown in formula a;

[0070]

[0071] (2) Preparation of hyperbranched macromolecules

[0072] Add maleic anhydride and diethanolamine into the three-necked flask according to the molar ratio of 1.05-1.2:1, pass N under ice-water bath 2 Under normal circumstances, after stirring f...

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Abstract

A polymerizable hyperbranched surfactant, the structure of the hyperbranched surfactant is: A‑B m -R 1 , wherein A is a structure represented by formula one, containing a double bond structure; B is a structure represented by formula two, which is a repeating structural unit of the hyperbranched surfactant, m represents the generation number of the hyperbranched polymer monomer, 0 ≤m≤4;R 1 It is fatty amine maleamide, containing a long hydrophobic carbon chain structure, its structure is shown in formula three, and the structures shown in formula one, formula two and formula three are as described in the instructions, and the hyperbranched surfactant A-B m -R 1 As a monomer, it can be copolymerized with acrylamide and 2-acrylamide-2-methylpropanesulfonic acid to obtain a hyperbranched polymer. The invention is a nonionic surface active agent with high surface activity, low critical micelle concentration and remarkable emulsifying effect.

Description

technical field [0001] The invention relates to a surfactant and a polymer for tertiary oil recovery, in particular to a polymerizable hyperbranched surfactant, a hyperbranched polymer and a preparation method thereof. Background technique [0002] ASP flooding enhances oil recovery mainly by improving oil washing efficiency and sweep coefficient. Pilot field experiments have proved that: ASP flooding improves the recovery of water-flooded layers by increasing the sweeping area and oil washing efficiency, which is comparable to water flooding and improves the recovery by more than 20% OOIP. [0003] Surfactant flooding is the main agent of ASP flooding, which mainly enhances oil recovery by improving oil washing efficiency. At present, the surfactants developed and used at home and abroad are mainly anionic surfactants (petroleum sulfonate, petroleum carboxylate, etc.) and nonionic surfactants (mainly polyoxyethylene, polyoxypropylene series). At present, most commonly use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C09K23/52C09K23/24
CPCC09K8/584C08F220/56C09K23/00
Inventor 陈思雅罗跃苏高申罗霄杨欢肖建雄
Owner YANGTZE UNIVERSITY
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