Supercritical carbon dioxide is liquid and has special properties that are intermediate between liquid and gas. It has the density of a liquid and the viscosity of gas. It can be used very well as a solvent. The density is adjustable over a wide range. A higher density improves the solubility of many substances.
By supplying the critical carbon dioxide, the desired substances dissolve. It penetrates very well into other substances and is suitable as an extraction or distraction agent. In order to feed liquid CO2 into the process of high-pressure extraction, pumps are necessary which are suitable for the critical temperature and the critical pressure of carbon dioxide.
Oscillating displacement pumps designed and engineered specifically for the extraction of critical carbon dioxide meet the requirements. They work at pressures of up to 1,000 bar and handle high mass flows.