EXTRACTION AND SEPARATION METHOD

摘要

An extraction and separation method is a method for extracting and separating a specific component from a raw material fluid and is provided with a separation and extraction step wherein the specific component is extracted and separated from the raw material fluid using an extraction device provided with plural stages of extraction units connected sequentially. The extraction and separation step has: an extraction step for extracting the specific component into an extraction solvent having a difference in specific gravity with respect to that raw material fluid from the raw material fluid while causing the raw material fluid and the extraction solvent to flow in a state of contact with each other in the extraction units for each stage; introduction step for introducing at least part of the fluid discharged from an extraction unit to the next stage extraction unit in a state wherein the raw material fluid and the extraction solvent are mixed; and a final separation step for separating the raw material fluid, after the specific component has been extracted in the fluid discharged from the extraction unit in a final stage, and the extraction solvent that has extracted the specific component.