Synthetic method of imidazole acidic ionic liquid

A technology of acidic ionic liquid and synthesis method, which is applied in the field of chemistry, can solve the problems of easy decomposition, unstable water and air, etc., and achieve the effects of easy separation, pollution avoidance and high catalytic performance
CN106946787AInactive Publication Date: 2017-07-14NANJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF TECH
Publication Date
2017-07-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a synthetic method of an imidazole acidic ionic liquid. The method comprises the following steps: (1) taking 1-methylimidazole, heating the 1-methylimidazole to 65-85 DEG C, dropise adding bromoethane under a stirring condition, carrying out stirring refluxing at 65-85 DEG C for 9-15 h to obtain a first mixture, washing the first mixture, and drying the first mixture in a vacuum drying box to obtain an intermediate; and (2) taking the intermediate obtained in step (1), placing the intermediate in ice water bath, dropwise adding a phosphoric acid solution under a stirring condition at 0-5 DEG C, carrying out stirring refluxing at 20-30 DEG C for 1-4 h after the dropwise addition ends in order to obtain a second mixture, and carrying out washing, rotary evaporation and drying on the second mixture to obtain the imidazole acidic ionic liquid. The method has the advantages of simplicity and easiness in operation, and the imidazole acidic ionic liquid has the advantages of high catalytic performance, repeated use, easiness in separation from reactants, easiness in recycling, and convenience in use.
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Description

technical field

[0001] The invention belongs to the technical field of chemistry, and in particular relates to a method for synthesizing an imidazole-based acidic ionic liquid. Background technique

[0002] Ionic liquids are a class of liquids composed entirely of ions, and are salts with a melting point below 100°C at or below room temperature. The so-called ionic liquid is a room temperature ionic liquid, which is generally composed of relatively large organic cations and relatively small inorganic anions. Compared with traditional ionic compounds, it is liquid at room temperature; compared with traditional liquid substances, it is composed of anions and cations in structure. Therefore, ionic liquids have unique physical and chemical properties and have the prospect of replacing traditional environmentally unfriendly solvents.

[0003] The history of ionic liquids dates back to 1914, when Walden reported (EtNH 2 )+HNO 3 - (melting point 12°C), which is the first ionic...

Claims

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