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Hydrophobically associating polyacrylamide and its preparing method

A technology of polyacrylamide and acrylamide, which is applied in the field of hydrophobically associated water-soluble polymers and their preparation, which can solve the problems of reduced viscosity increasing effect and breakage, and achieve the effects of improving solubility, not easy to curl, and good hydrophobic performance

Inactive Publication Date: 2008-05-21
INST OF CHEM CHINESE ACAD OF SCI +1
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Problems solved by technology

The traditional use of polyacrylamide for oil displacement mainly relies on its high molecular weight to achieve the purpose of increasing viscosity, but the simple pursuit of high molecular weight is subject to many restrictions in application, for example, high temperature, high shear rate, high salinity, etc. will cause The polyacrylamide molecular chain is curled or broken, resulting in a sharp decrease in the viscosity-increasing effect

Method used

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  • Hydrophobically associating polyacrylamide and its preparing method
  • Hydrophobically associating polyacrylamide and its preparing method

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Embodiment

[0017] 1. Synthesis of Dendritic Hydrophobic Monomer X

[0018] Add 20g of concentrated sulfuric acid to 100ml of glacial acetic acid at 20°C to form a solution, add 5.7g of acrylonitrile dropwise to the solution under stirring, and then add 11.2g of diisobutylene (purchased from TCI) dropwise to the solution to maintain the reaction system The temperature is below 45°C, after continuing to stir and react for 2-3 hours, add 5 times the volume of secondary water to it, stir evenly and let stand. Needle-like crystals were precipitated, filtered, washed with water, and freeze-dried to obtain a relatively pure monomer.

[0019] 2. Synthesis of Dendritic Hydrophobic Monomer-Acrylamide Copolymer

[0020] Add acrylamide (AM), dendritic hydrophobic monomer (X), sodium dodecyl sulfate (SDS), and distilled water into the container, adjust the above solution to neutral with NaOH solution, and keep the temperature of the above solution at 40°C Next, pass high-purity N into the solution ...

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Abstract

The invention discloses a kind of hydrophobic association polyacrylamide and its preparative method. The product is the copolymer of acrylamide and dendritic I branch-like hydrophobic monomers, in which, the amount of monomeric unit of acrylamide is integer of 124013~139860, the amount of monomeric units of dendritic hydrophobic monomers is integer of 140~6527. In the invention, high degreed branching hydrophobic monomers are inlet on a chain of macromolecules by the way of micelles' copolymerization, the monomers can promote the capability of hydrophobic interaction of polymers' chain without any curling for its greater hydrophobic volume, so a better viscosity can be achieved. The content of the hydrophobic chain can be controlled by the way of controlling the amount of hydrophobic monomers to improve the solubility of copolymer

Description

technical field [0001] The invention relates to a hydrophobic association water-soluble polymer and a preparation method thereof, in particular to a hydrophobic association polyacrylamide and a preparation method thereof. Background technique [0002] With the increase of oil extraction times, the water content in it also increases, and it is necessary to add oil displacement agent to achieve a certain recovery rate. The traditional use of polyacrylamide for oil displacement mainly relies on its high molecular weight to achieve the purpose of increasing viscosity, but the simple pursuit of high molecular weight is subject to many restrictions in application, for example, high temperature, high shear rate, high salinity, etc. will cause The polyacrylamide molecular chain is curled or broken, resulting in a sharp decrease in the viscosity-increasing effect. [0003] Hydrophobic association Water-soluble polymers are an important class of water-soluble polymers, which introduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/56
Inventor 王金本樊明红李静伍家忠王毅琳闫海科向问陶张健韩明
Owner INST OF CHEM CHINESE ACAD OF SCI
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