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Preparation method of polymerizable zwitterionic surfactant

A technology of surfactant and zwitterion, which is applied in the field of organic compound preparation, can solve problems such as complex preparation process, achieve low reaction temperature, increase reaction speed, and facilitate separation

Inactive Publication Date: 2015-04-01
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of preparation method of polymerizable zwitterionic surfactant; solve the problem of complex preparation process in the prior art

Method used

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  • Preparation method of polymerizable zwitterionic surfactant

Examples

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Effect test

Embodiment 1

[0022] Put 2g of N-(2-dimethylaminoethyl)acrylamide and 3.18g of 5-bromovaleric acid in a three-necked flask, add 0.02g of KI, 10ml of acetone, feed N2, and keep the temperature at 30°C under the protection of N2 React for 60 hours, filter, remove acetone by rotary evaporation of the filtrate, then add water to dissolve, extract with ether, remove unreacted reactants, and use freeze-drying to completely remove water after separation to obtain a white powder, which is the product, with a yield of 50.4%.

Embodiment 2

[0024] Put 2g of N-(2-dimethylaminoethyl)acrylamide and 4g of 5-bromovaleric acid in a three-necked flask, add 0.03g of KI, 15ml of ethanol, feed N2, and react at a constant temperature of 45°C under the protection of N2 After 72 hours, filter, the filtrate was rotary evaporated to remove ethanol, then dissolved in water, extracted with ether to remove unreacted reactants, after separation, completely remove water by freeze-drying to obtain a white powder, which is the product, with a yield of 72.3%.

Embodiment 3

[0026] Put 2g of N-(2-dimethylaminopropyl)acrylamide and 7g of 5-bromoundecanoic acid in a three-necked flask, add 0.03g of KI, 15ml of ethanol, feed N2, and keep the temperature at 40°C under the protection of N2 Reacted for 66 hours, filtered, and the filtrate was rotary evaporated to remove ethanol, then dissolved in water, extracted with ether to remove unreacted reactants, and after separation, the water was completely removed by freeze-drying to obtain a white powder, which was the product, with a yield of 65.8%.

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Abstract

The invention relates to a preparation method of a polymerizable zwitterionic surfactant. The preparation method of the polymerizable zwitterionic surfactant comprises the following steps: adding a certain amount of N-(2-dimethylaminoethyl) acrylamide or N-(2-dimethylamino propyl) acrylamide and C5-11 linear-chain bromo carboxylic acid into a reaction flask, by taking potassium iodide as a catalyst and taking absolute ethyl alcohol or acetone as a solvent, putting the reaction flask in a water bath kettle, magnetically stirring, and continuing to react under the protection of nitrogen; filtering products, carrying out rotary evaporation on filtrate to remove ethyl alcohol or acetone, then adding water to dissolve, and repeatedly extracting by using diethyl ether; freezing and pumping off water phase to obtain white powder which is the polymerizable zwitterionic surfactant. The preparation method of the polymerizable zwitterionic surfactant has the most important characteristics of no polymerization inhibitor and low reaction temperature; the catalyst is added, so that the reaction rate is increased; the water is frozen and removed, so that the separation is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a polymerizable zwitterionic surfactant, belonging to the technical field of organic compound preparation. Background technique [0002] Polymerizable zwitterionic surfactants are also called zwitterionic surfactant monomers, and their structures generally consist of unsaturated bond moieties with polymerization activity and side group moieties with electrically neutral zwitterionic characteristics. Homopolymerization or copolymerization with other neutral monomers under the same conditions can produce zwitterionic polymers with zero net charges and reverse polyelectrolyte solution behavior. Zwitterionic polymer has excellent chemical resistance, thermal stability, hydration ability and is not easily affected by the pH value of the solution. It is expected to have important applications in oilfield exploitation, water treatment, textile, medicine, turbulence drag reduction and colloid protection. This ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/38C07C231/12B01F17/18B01F17/22C09K23/18C09K23/22
Inventor 陈平贾慧安会勇
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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