SuperCritical CO₂

UNITECH has developed an innovative cleaning system elCO2 sc based on the cleaning properties of Supercritical CO2. The process has been developed in conjunction with the French Atomic Energy Commission (CEA). As part of the partnership, UNITECH benefits from an exclusive design and operating license (ended in 2011) from CEA in the field of Supercritical CO2 cleaning.

Supercritical CO₂ is an excellent alternative to solvents for cleaning and sterilizing a wide range of materials. Results are optimal and extremely advantageous from an environmental standpoint.

Practiced for over a century, the process entails bringing carbon dioxide to a temperature above 31°C and pressure to above 74 bar simultaneously. Under such conditions, carbon-dioxide behaves in a "supercritical" phase, displaying properties of both a gas and a liquid.

The properties of Supercritical CO₂ are similar to those of a solvent, and may be used as a substitute for solvents in full or in part. Supercritical CO₂ is a harmless cleaning, degreasing and particle-removing agent; there is no risk of oxidation or other damage to the material undergoing treatment.

Separated from the contaminants, Supercritical CO₂ can be recycled indefinitely while its properties remain unchanged. Supercritical CO₂ avoids use of solvents or detergents which represent a significant cost through both their consumption and elimination.
Very simply, supercritical CO₂ is :

Testing facilities

UNITECH has designed and constructed a Supercritical CO₂ development machine which is operated at the laboratory. This facility is available for product testing of customer products. For more information, please contact our central office.

Supercritical CO₂ Presentation