Traditional technologies in many cases do not offer a satisfactory solution to a specific problem. Furthermore, there is a continuous search to reduce production costs. Pilot scale studies may show that, despite initial high capital costs, operating costs would be lower and the overall feasibility … [Read more...] about Advantages of Supercritical Technology
Archives for October 2018
Controlling the CO2 Level
We say that a liquid is in equilibrium with its gas when the same mass is exchanged from the gas to liquid and from liquid to gas. This happens continuously, and this point is strongly dependent on pressure and temperature. Any change in temperature produces a change in the pressure. When … [Read more...] about Controlling the CO2 Level
Supercritical CO2’s Extraction Efficiency
Supercritical carbon dioxide isn’t just an efficient solvent for apolar compounds. In fact, if it’s combined with fluid modifiers like water, it becomes a very efficient solvent for medium polar and polar substances (caffeine for coffee decaffeination). The extraction efficiency is better than … [Read more...] about Supercritical CO2’s Extraction Efficiency
Controlling Solubility of Supercritical CO2
The Supercritical CO2 extraction process is “geometrically variable.” A supercritical fluid is any compound at a temperature and pressure above its Critical Point. It can diffuse through solids like a gas, and it can dissolve materials like a liquid. For any pure compound, there is a transition … [Read more...] about Controlling Solubility of Supercritical CO2
How Separation and Fractionation Works
After the extraction process, the mixture composed of CO2 and solutes leaves the extraction vessel(s) and it is directed to the separation vessels. By varying the pressure, flow and temperature of these vessels, it is possible to induce the selective precipitation of different chemical compounds as … [Read more...] about How Separation and Fractionation Works