Supercritical CO2 extraction equipment
Supercritical carbon dioxide extraction equipment is mainly composed of extraction kettle, separation kettle, carbondioxide high-pressure pump, entrainer pump, heat exchange system, filtrationsystem, purification system, pressure and temperature control system, flowmeasurement system, (distillation column), pipeline, support, valves and othercomponents.
Eight major application
Eight major applications of supercriticalcarbon dioxide extraction equipment are as follows:
- Pesticides (malathion and otherextraction);
- Pharmaceutical industry (Chinesemedicine extraction);
- Hydrometallurgy (extraction of heavymetals, rare earth metals, etc.);
- Nuclear industry (extraction ofuranium);
- Bioengineering (extraction of organicacids from nutrient solution, interferon and fermentation broth);
- Fine chemicals (extraction of essenceand spices);
- Food industry (edible oil, food pigment,additives, etc.);
- Environmental protection industry(sewage treatment and recycling).
Supercritical extraction technology
Supercritical extraction technology is anew subject appearing in modern chemical separation, and it is an advancedseparation technology rising in the world at present.
The so-called supercritical fluid refers to the fluid whose the rmodynamic state is above thecritical point (Pc, Tc).
The critical point is the point where the gas-liquidinterface has just disappeared. The supercritical fluid has very uniquephysical and chemical properties. Its density is close to the liquid, itsviscosity is close to the gas, and its diffusion coefficient is large, itsviscosity is small, and its dielectric constant is constant. The characteristics of large scale make it better separating effect. It is a goodsolvent.
Supercritical extraction means that the solvent contacts with theextract in the extraction cylinder under high pressure and suitabletemperature, the solute diffuses into the solvent, and then changes theoperating conditions in the separator, so that the solute can be separated toachieve the purpose of separation.
Greenand clean technology
Supercritical fluid technology is a greenand clean technology with high efficiency, low energy consumption, safety,hygiene and environmental protection characteristics, which has attracted wideattention in the past 30 years.