A supercritical carbon dioxide extraction and separation system and method based on extrusion puffing

Abstract

The present application belongs to the field of chemical separation and bioengineering mechanical equipment, and provides a supercritical carbon dioxide extraction and separation system and method based on extrusion and puffing, which is composed of a refrigeration and pressurization circulation subsystem, an extrusion and puffing subsystem, a jet feeding subsystem, a continuous flow extraction loop subsystem, an extract depressurization and separation subsystem and a raffinate separation subsystem. The subsystems work cooperatively to realize continuous production and recycling of carbon dioxide. The method and system are widely applied to the extraction fields of oil, natural product active ingredients and heat-sensitive biological drugs, and have significant technical advantages and market prospects. The method covers steps of extrusion and puffing, pre-dipping, supercritical fluid extraction, separation of extract and raffinate, etc. Through extrusion and puffing of the material to be extracted, the permeability of the material is improved, and the excellent permeability and solubility of supercritical carbon dioxide are utilized to reduce power consumption, shorten extraction time and improve extraction efficiency.

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