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A deep eutectic substance based on hydroxyethyl inner salt

A hydroxyethyl, eutectic technology, applied in the field of eutectic material preparation, can solve the problems of poor catalyst stability, deliquescence, corrosion, etc., and achieve the effect of convenient post-processing, low raw material cost, and heat resistance

Inactive Publication Date: 2017-09-19
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is one or more of the following problems in the above method: the halogen ions containing chloride ions etc. severely corrode metal equipment such as stainless steel; the catalyst has poor stability to air or water, etc.; and release trimethylamine

Method used

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  • A deep eutectic substance based on hydroxyethyl inner salt
  • A deep eutectic substance based on hydroxyethyl inner salt
  • A deep eutectic substance based on hydroxyethyl inner salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a 50mL beaker, add 18.322 grams (0.1mol) of internal salt of the formula (2) and 18.418 grams (0.2mol) of glycerol, stir and react at 120°C for 0.5 hour, then place the beaker in a vacuum oven, The temperature is 0.1MPa, the temperature is 60°C, and the negative pressure is dried for 12 hours to obtain a transparent colorless liquid with a yield close to 100%.

[0025]

[0026] The prepared eutectic substance is liquid at normal temperature and pressure. Combined with an acidic catalyst, it can be used as a dissolution medium for natural straw cellulose; mixed with sodium hydroxide, it can be used as an excellent catalytic system for transesterification of biodiesel.

Embodiment 2

[0028] In a 50mL beaker, add 18.322 grams (0.1mol) of the internal salt of the formula (2) and 36.836 grams (0.4mol) of glycerin, and stir the reaction at 60°C for 3 hours to complete the reaction. The vacuum degree is 1.0MPa and the temperature is 60°C , dried under negative pressure for 2 hours to obtain a transparent colorless liquid with a yield of 100%. The prepared eutectic substance is liquid at normal temperature and pressure.

Embodiment 3

[0030] In a 50mL beaker, add 22.728 grams (0.1mol) of the internal salt of the formula (3) and 9.209 grams (0.1mol) of glycerol, stir and react at 90°C for 2.5 hours, then place the beaker in a vacuum oven, The temperature is 0.5MPa, the temperature is 70°C, and the negative pressure is dried for 5 hours to obtain a transparent colorless liquid with a yield close to 100%. The prepared eutectic substance is liquid at normal temperature and pressure.

[0031]

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Abstract

The invention discloses an ethoxyl inner salt based eutectic substance. The substance is characterized by comprising organic amphipathic molecules with a positive charge and a negative charge as well as polyhydric alcohol. According to a preparation method, the two raw materials, the organic amphipathic molecules and polyhydric alcohol, are mixed in a proportion, heated and stirred, a transparent liquid is obtained, and a target product is obtained after the transparent liquid is dried. The ethoxyl inner salt based eutectic substance has the advantages as follows: chloride ions and other halide ions are not contained in the eutectic system, and the eutectic substance cannot corrode metal equipment such as stainless steel equipment and the like; the preparation process is simple, operation is convenient and the raw materials are easy to obtain; solvents are not required for a reaction medium, an atomic economy reaction is realized, the eutectic substance is suitable for industrial production, and the chemical process is environment-friendly.

Description

A technical field [0001] The invention relates to a preparation method of a deep eutectic substance based on hydroxyethyl inner salt, and belongs to the technical field of chemical material preparation. This method is suitable for the occasion of synthesizing the target compound under normal pressure with internal salt containing hydroxyethyl group and polyhydric alcohol as raw materials. Two background technology [0002] Deep eutectic solvent refers to a two-component or three-component combination of hydrogen bond acceptors (such as quaternary ammonium salts) and hydrogen bond donors (such as amides, carboxylic acids, and polyols) in a certain stoichiometric ratio. A eutectic mixture whose freezing point is significantly lower than the melting point of the pure substances of each component. The physical and chemical properties of deep eutectic solvents are very similar to ionic liquids, and can also be classified as a new class of ionic liquids or ionic liquid analogs. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/14C07C303/32C07C29/00C07C31/22C07C31/20
CPCC07C29/00C07C31/202C07C31/205C07C31/225C07C303/32C07C309/14
Inventor 方东彭欢孙思宇武力左陈鑫王锦玲吴加加
Owner YANCHENG TEACHERS UNIV
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