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Allyl type cationic monomer and preparation method thereof

A cationic monomer, allyl-type technology, applied in the fields of organic chemistry, water treatment, polymer materials and oil field chemistry to improve oil recovery, to achieve the effect of low surface activity

Inactive Publication Date: 2019-03-05
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an allyl-type cationic monomer and its preparation method to solve the technical problem that there is no high-viscosity liquid substance in the prior art that can effectively regulate the hydrophilic-lipophilic balance and meet the special needs of more application fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 50 parts of N,N-dimethyl n-octylamine, 100 parts of solvent tetrahydrofuran (THF), and 0.5 parts of catalyst tetrabutylammonium bromide (TBAB) into a three-necked round-bottomed flask equipped with a reflux condensing device. Stir the reaction for 1 h, then raise the temperature to 70°C, add 30 parts of allyl chloride, and continue the reaction for 6 h. The reaction product was distilled off the solvent under reduced pressure to obtain an oily crude product, which was then separated by silica gel column chromatography to obtain an allyl cationic quaternary ammonium salt active monomer——N-allyl-N,N-dimethyl-N - n-octylammonium chloride, yield 95%.

Embodiment 2

[0021] Add 50 parts of N,N-dimethyl n-decylamine, 100 parts of solvent tetrahydrofuran (THF), and 5 parts of catalyst tetrabutylammonium chloride (TBAC) into a three-necked round-bottomed flask equipped with a reflux condensing device. Stir the reaction for 1 h, then raise the temperature to 70°C, add 30 parts of allyl chloride, and continue the reaction for 10 h. The reaction product was distilled off the solvent under reduced pressure to obtain an oily crude product, which was then separated by silica gel column chromatography to obtain an allyl cationic quaternary ammonium salt active monomer——N-allyl-N,N-dimethyl-N - n-decyl ammonium chloride, yield 92%.

Embodiment 3

[0023] Add 50 parts of N, N-dimethyl n-dodecylamine, 100 parts of solvent N, N-dimethylformamide (DMF), and 7 parts of catalyst tetrabutylammonium chloride (TBAC) into the equipment equipped with reflux condensation In the three-neck round bottom flask of the device, stir the reaction at room temperature for 1 h, then raise the temperature to 140° C., add 20 parts of allyl chloride, and continue the reaction for 10 h. The reaction product was distilled off the solvent under reduced pressure to obtain an oily crude product, which was then separated by silica gel column chromatography to obtain an allyl cationic quaternary ammonium salt active monomer——N-allyl-N,N-dimethyl-N - n-dodecyl ammonium chloride, yield 95%.

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Abstract

The invention provides an allyl type cationic monomer and a preparation method thereof, and relates to the field of improvement of oil recovery through organic chemistry, water treatment, polymer materials and oilfield chemistry. The allyl type cationic monomer has a molecular formula of CH2=CH-CH2N+(CH3)2(CmH<2m+1>)Cl-, wherein m is selected from the group consisting of 8, 10, 12, 14, 16 and 18.The allyl type cationic monomer is prepared from the following raw materials by weight: 50 parts of N,N-dimethyl alkyl amine (with a molecular formula of (CnH<2n+1>)-N(CH3)2, wherein n is selected from the group consisting of 8, 10, 12, 14, 16 and 18), 10 to 50 parts of allyl chloride, 0.1 to 15 parts of a catalyst and 10 to 200 parts of a solvent. The allyl type quaternary ammonium salt cationicmonomer prepared by using the preparation method provided by the invention can be homopolymerized or copolymerized with active monomers like acrylamide and acrylic acid under the action of an initiator; and an obtained novel polymer can effectively regulate and control hydrophilic-lipophilic balance, has the advantages of flocculation, sterilization, low surface activity, etc., and can be used forwastewater treatment, oil exploitation, viscosity adjustment of fluid materials, preparation of functional polymer microspheres, fracturing temporary plugging of oil and gas wells, etc.

Description

technical field [0001] The invention relates to the fields of organic chemistry, water treatment, macromolecule materials and oil field chemistry to enhance oil recovery, and in particular to an allyl cationic monomer and a preparation method thereof. Background technique [0002] With the continuous deepening of oil extraction, the water content of oil wells gradually increases, which increases the difficulty of secondary and tertiary development of low-permeability and ultra-low-permeability oil wells. In order to overcome the problems of high water content and low permeability, oil workers have developed a new mining technology - hydraulic fracturing technology. Hydraulic fracturing technology is to use the surface high-pressure pump to inject high-viscosity liquid into the oil layer through the wellbore, forming high pressure at the bottom of the oil layer. When the pressure exceeds the fracture pressure of the rock in the oil layer, cracks will be formed in the oil laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63C07C209/00
CPCC07C209/00C07C211/63
Inventor 王继宇
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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