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Environment-friendly choline ionic liquid and preparation method therefor

A choline ion, environment-friendly technology, applied in the preparation of organic compounds, carboxylates, sulfonates, etc., can solve the problems of few types of choline ionic liquids and limited applications, and achieve good stability in repeated use , simple recovery and simple preparation process

Inactive Publication Date: 2016-02-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Choline ionic liquids are a kind of low toxicity and hydrophilic ionic liquids, which have good application prospects in the field of chemical separation, but there are relatively few types of choline ionic liquids, which limit their application to a certain extent
Currently, the preparation of choline-based ionic liquids is only reported in Chinese patent CN101260051A, and the synthesized choline-based ionic liquids are only effective in biodegradation

Method used

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  • Environment-friendly choline ionic liquid and preparation method therefor
  • Environment-friendly choline ionic liquid and preparation method therefor
  • Environment-friendly choline ionic liquid and preparation method therefor

Examples

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Embodiment

[0032] Take the synthesis process of choline methanesulfonate as an example: in a 250mL flask, add 50g (0.36mol) of choline chloride (Cholinechloride), 14.4g (0.36mol) of sodium hydroxide (NaOH) and 125mL of ethanol in The mixture was stirred at 40°C for 4 hours to perform a reaction. After the reaction, the insoluble sodium salt is removed by filtration, and the ethanol solution containing choline hydroxide is recovered. Next, cool the recovered solution to 0°C, then add 38g (0.396mol) of methanesulfonic acid, stir evenly for 30 minutes, then heat the reaction solution to 75°C for reflux reaction for 5 hours, and cool to room temperature after the reaction. The ethanol solvent was removed by rotary evaporation at 50° C. to obtain the target product, choline methylsulfonate (slight yellow), with a yield of 99%. Product Confirmation:

[0033] Described product is carried out structural characterization, the result is as follows figure 1 : Choline Methanesulfonate 1 HMR(D 2...

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Abstract

The invention relates to environment-friendly novel choline ionic liquid and a method for preparing the choline ionic liquid. The novel choline ionic liquid contains levulinic acid choline, sorbic acid choline, glutaric acid choline, adipic acid choline, (p-, m- and o-)phthalic acid choline, trifluoromethanesulfonic acid choline, benzenesulfonic acid choline, (p-, m- and o-)toluenesulfonic acid choline, bis(trifluoromethane sulfonimide) choline and the like. The novel choline ionic liquid has the remarkable advantages that the preparation process is simple, the recovery is simple and convenient, the stability of reuse is good, and the like.

Description

technical field [0001] The invention relates to a series of environmentally friendly novel choline ionic liquids and a method for preparing the choline ionic liquids. Concretely comprise two steps: 1) under the condition that basic catalyst exists, choline hydrochloride is dissolved in alcoholic solvent, and heating generates choline hydroxide solution. 2) A novel choline-based ionic liquid was obtained by ion-exchanging choline hydroxide solution with an organic acid. Background technique [0002] With the improvement of people's awareness of environmental protection and sustainable development, the development of new green solvents to replace organic solvents for the production of fine chemicals has attracted more and more attention. With unique physical and chemical properties such as "zero" vapor pressure, high stability, and strong solvency, ionic liquids have become one of the most promising solvents in the field of green chemistry research. [0003] Choline ionic li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/40C07C213/08C07C303/32C07C309/04C07C309/30C07C309/06C07C51/41C07C53/10C07C59/185C07C53/18
Inventor 刘菲王爱琴张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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