Dehydration process for mixed ionic liquid

An ionic liquid and hybrid technology, which is applied in the direction of solid adsorbent liquid separation, separation methods, chemical instruments and methods, etc., can solve the problems of low water removal efficiency of ionic liquids, etc.

Active Publication Date: 2015-03-25
LINZHOU KENENG MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a hybrid ionic liquid dewatering process to solve the problem of low dewatering efficiency of ionic liquids in traditional processes

Method used

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  • Dehydration process for mixed ionic liquid
  • Dehydration process for mixed ionic liquid
  • Dehydration process for mixed ionic liquid

Examples

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Embodiment 1

[0020] as attached figure 1 Shown, the present invention uses rectifying tower 3 dry mass ratios to be 1-methyl-2-allyl-3-methylimidazole-bistrifluoromethylsulfonylimide salt and N-methyl -N-Propylpiperidine-mixture of bistrifluoromethylsulfonimide salts. The rectification tower 3 is filled with a solid water-removing filler mixture, wherein the solid water-removing filler mixture is a mixture of alumina, activated carbon and adsorption material NSUL-1 in a mass ratio of 3:1:1. Pass the ionic liquid in the raw material liquid storage tank 1 into the rectification tower 3, keep the pressure of the rectification tower 3 at 1.0 MPa, feed water vapor or heat transfer oil into the jacket layer of the rectification tower 3, and keep the temperature of the tower body At 80° C.; the ionic liquid enters from the bottom of the rectification tower and exits from the top of the tower. When it is detected that the water content of the ionic liquid is less than or equal to 20 ppm, the drie...

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PUM

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Abstract

The invention discloses a dehydration process for mixed ionic liquid. The dehydration process comprises the following steps: (1) filling a rectifying tower with a solid dehydration filler mixture, wherein the solid dehydration filler mixture is a mixture of aluminum oxide, active carbon and an adsorption material NSUL-1 according to a mass ratio of 3 to (0.5-1) to (0.5-1); (2) introducing the ironic liquid in a raw material liquid storage tank into the rectifying tower under the nitrogen protection, and keeping the pressure and temperature of the rectifying tower, wherein the pressure is 0.1-2.0 MPa and the temperature is 80-100 DEG C; (3) when the moisture content of the ionic liquid is not more than 20 ppm, driving the dried ionic liquid into a dried product liquid storage tank. Compared with the prior art, the dehydration process has the characteristics that the trace moisture in the ionic liquid can be quickly removed, the moisture content of the obtained ionic liquid can reach less than 20 ppm, and the ionic liquid can be used in a downstream part with relatively high moisture content requirement.

Description

technical field [0001] The invention relates to an industrial water removal method, in particular to a mixed ionic liquid water removal process. Background technique [0002] Ionic liquid, also known as ionic liquid, ionic fluid or room temperature molten salt, is a molten salt composed of cations and anions. Ionic liquids are characterized by being liquid in a wide temperature range of -50 to 400°C, and various molten salts that are liquid at room temperature (25°C) are known. [0003] In addition to being in a liquid state over a wide temperature range, ionic liquids also have the characteristics of extremely low vapor pressure and non-volatility, good thermal and electrochemical stability, low viscosity, and high ionic conductivity. Taking advantage of these characteristics, ionic liquids are used in electronic devices such as dissolved electrolytes or electrolyte compositions of electrolytes, dye-sensitized solar cells, fuel cells, lithium-ion secondary batteries, and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/00
Inventor 汪志华方金法
Owner LINZHOU KENENG MATERIAL TECH
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