Over the years Separeco has created a supply technology chain that allowed to fully develop the technology applied to supercritical fluids starting from scientific knowledge to industrial plant construction, in particular through the use of supercritical CO2 in the pharmaceutical, cosmetic, nutraceutical, food, healthy food. The name is “Super Critical Fluid Network”, (SCFN).
The supply chain is composed by four parts: engineering, scientific, industrial and market partners and Natural Medicine experts (SIMN). Separeco is the CO2 systems designer. Exenia Group comes from scientific world. Exenia Group is the first company in Italy who developed the technology making use of supercritical fluid state and has a very detailed knowledge about herbal drugs and natural substances extraction processes. Mancin and Coproget comes from the industrial world. Mancin has established over time a lot of experience in the field of automation and numerical control techniques, while Coproget works in the Stainless steel branch in the field of automatic machinery. SIMN is the Italian Society of Natural Medicine, created to give adequate answers to the demand of health and wellness that requires new rigor, more reassurance, especially a more authoritative scientific correctness.
One important component of the standards for pressure vessels is the use of a safety factor. The measured physical properties of a material, including ultimate tensile strength, are divided by a defined safety factor to derive the maximum allowable stress. In this way, allowance is made for limitations in the testing technology, unusual stress concentrations, non-uniform materials, and material flaws. Technological improvements, especially in materials testing, have allowed a reduction in the safety factor to 3.5 in current editions of Section I; this is the same factor used in Sections VIII-1 and VIII-2
Circumferential stress (longitudinal joints)
Supercritical fluid properties
The Supercritical fluid have unique physical and chemical properties taht make them special solvent.These properties, that affect directly the mass transfer, are the viscosity and the diffusion coefficient. In the table here below are presented the typical values feor the range of variation of density, viscosity and diffusioncoefficient of liquids, gasses and SCF.
|Viscosity (Pa.s) x 105
|Diffusion coefficient (m2/s) x 109
The SCF have a density comparable to those of liquids, equivalent values of viscosity relatively to the gases and values of diffusioncoefficients intermediate betwenn those of liquids and gases.Thus, the SCF have a dissolution power similar to those of liquids but but with property of mass transfer much more fabourable and this is one of the capital advantages of the use of these fluid as solvents. In particular, the SCF are racomanded for the extractionof solutes from solid matrices because, in addition to the properties already listed, the SCF have a zero surface tension.