Room temperature ionic liquid containing unsaturated double bond and its prepn and application

A technology of room temperature ionic liquids and ionic liquids, applied in room temperature ionic liquids, the preparation of the above-mentioned ionic liquids, and the fields of application of the above-mentioned ionic liquids, can solve the problems of undiscovered olefin substituents, etc.

Inactive Publication Date: 2003-05-14
山东中科恒联生物基材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported N,N'-dihydrocarbyl-substituted imidazole ionic liquids only contain saturated alkane substituents, and generally change the length of the alkyl straight ch

Method used

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  • Room temperature ionic liquid containing unsaturated double bond and its prepn and application

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] Synthesis of N-allyl, N'-methylimidazolium chloride salt

[0044] Add 200ml of allyl chloride and 100ml of dry N-methylimidazole into the flask, stir and reflux in an oil bath at 60°C. After 12 hours, the flask was evacuated to remove volatile components, and a yellow to brownish-red product with a certain viscosity was obtained.

example 2

[0046] Synthesis of N-allyl, N'-methylimidazolium bromide

[0047] Add 40ml of dry N-methylimidazole into the flask, and slowly drop in 60ml of allyl bromide while stirring. After dropping, put the flask into an oil bath at 60°C, stir and reflux for 3 hours. Then vacuumize the flask to remove the volatile components to obtain a yellow to brown-red product with a certain viscosity.

example 3

[0049] Synthesis of N-allyl, N'-methylimidazolium acetate

[0050]Weigh 15.477 grams of N-allyl, N'-methylimidazolium chloride salt, dissolve in 50ml of water; weigh 18.499 grams of lead acetate heptahydrate, add 100ml of water to dissolve; mix the two evenly, and put them in a refrigerator at 0°C for 12 hours. Then take out the suction filter. The obtained filtrate was evaporated with a rotary evaporator to remove volatile components, and then dried in vacuum to obtain a yellow liquid product.

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Abstract

The room temperature ionic liquid containing unsaturated double bond has the general expressino of A+B-, where A+ contains R1 being hydroxyl with 1-4 carbon atoms and R2 containing 2-20 carbon atoms and at least one double bond; and B- is one of anions, including chlorate radical, bromate radical, iodate radical, acetate radical, sulfate radical, nitrate radical, tetrafluorobromate radical, etc. Its preparation is to mixture and react olefin halide R1X and N-alkyl imidazole to obtain ionic liquid dialkyl imidazolium halide. The present invention also relates to the application of the ionic liquid in dissolving cellulose and preparing cellulose derivative.

Description

technical field [0001] The invention relates to an imidazole type ionic liquid, in particular to a room temperature ionic liquid containing unsaturated double bonds. [0002] The present invention also relates to the preparation method of the above-mentioned ionic liquid. [0003] The present invention also relates to the use of the above-mentioned ionic liquids. Background technique [0004] Ionic liquids mainly refer to organic salts that can be melted at around room temperature or lower, and can also be their mixtures. Most of the ionic liquids reported in the early days are organic salts containing aluminum halides. Their disadvantage is that they are sensitive to moisture and will decompose when they meet water. In the 1990s, many ionic liquids that were stable to water and air were successively synthesized. Most of the cations of these ionic liquids are imidazole or pyridine derivatives. Because many of them have excellent properties such as good low-temperature me...

Claims

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Application Information

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IPC IPC(8): C07D233/56C08B1/00D21C3/20
Inventor 张军武进伍强何嘉松
Owner 山东中科恒联生物基材料有限公司
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