Process method for regenerating ionic liquid and separating and recovering absorbents

A technology of ionic liquids and process methods, which is applied in the fields of ionic liquid regeneration and absorbent separation and recovery, can solve the problems of inability to obtain high-purity ionic liquids, the regeneration process takes a long time, and the slow diffusion process of absorbents, etc., to achieve resource recovery. , improve regeneration efficiency, and solve the effect of difficult regeneration
CN102580342AInactive Publication Date: 2012-07-18BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a process method for regenerating an ionic liquid and separating recovering absorbents. The method for regenerating an ionic liquid and separating recovering absorbents is implemented by taking steam such as water and ethanol as sweeping gases, adopting different tower types, sweeping and removing absorbent in the ionic liquid at the temperature of 40-200 DEG C and under the pressure of 0.01-2.0MPa, and condensing the swept gases to separate steam from the absorbents. According to the process method, steam is enabled to pass through the ionic liquid through a bubbling or gas-liquid inverse contact method, the mass transfer effect is enhanced by adopting various tower types, and the regeneration of the ionic liquid is realized; the steam is cooled into a liquid by condensing, and the absorbents are kept in a gaseous state, so that the swept absorbents are separated and recovered; and the condensed steam is reheated and applied to sweeping of the ionic liquid. Due to the adoption of the process method provided by the invention, the ionic liquid can be regenerated effectively in a short time, and the reutilization of the ionic liquid and separation and recovery of the absorbents are realized.
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Description

technical field

[0001] The invention relates to a process for regeneration of ionic liquid and separation and recovery of absorbent. Specifically, the present invention relates to a method for contacting the ionic liquid and steam in a regeneration tower to purge the absorbent in the ionic liquid, realize the regeneration of the ionic liquid, and separate and recover the absorbent. Background technique

[0002] Ionic liquids are salts composed of organic cations and inorganic or organic anions that are liquid at room temperature to 100°C. It evolved from traditional high-temperature molten salts, but compared to conventional ionic compounds, ionic liquids are liquid in a wide temperature range around room temperature. Ionic liquids have many excellent properties: a wide range of liquid temperature, from below or close to room temperature to above 300 °C, good thermal and chemical stability; almost no vapor pressure; adjustable structure and controllable properties of ionic ...

Claims

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