Method and device for extracting solute from gaseous solvents

Abstract

A process is described for the separation of solutes dissolved in a gaseous solvent. The process is useful in the extraction and recovery of solutes using supercritical fluid extraction, and in the purification of impure steam. The process utilizes a sorbent to remove solute followed by an in situ regeneration of the sorbent and the recovery of the solute.

Description

technical field [0001] The present invention relates to a method and apparatus for separating solutes dissolved in gaseous solvents. Furthermore, the present invention relates to the separation and recovery of one or more solutes dissolved in high-pressure gas, and the recovery of purified high-pressure gas. In the present invention, a gas solution refers to a solution in which the contained solvent has obvious compressibility, or the solution itself has obvious compressibility. Background technique [0002] At low pressure, a gas is a poor solvent, and the potential solubility of a potential solute is limited by its volatility. For example: the humidity content of air is limited by the vapor pressure of water at the dew point, ie the temperature at which the vapor pressure of water equals the partial pressure of water in the gas. At high pressures, gases have a pronounced solvent effect, even for non-volatile substances, for example, at temperatures where the vapor pressu...

AI Technical Summary

Problems solved by technology

[0006] 1. Unless the pressure is reduced to a very low level, there will be a significant amount of solute still in the dissolved state, and the low pressure will make the cost of reusing the solvent too high;

[0007] 2. The formation of two states in the decompression or temperature adjustment device will cause corrosion to the equipment or reduce the heat transfer efficiency

At this point, extremely pure fluids are required, and the compressor lubricant is difficult to remove

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