Monthly Archives: November 2011

Click Here for Downloadable Instructions In PDF Format

The SFT-110, SFT-110XW, SFT-150, SFT-250, and SFT-NPX-10 units are not designed and manufactured to Class I Division II explosion proof standards and therefore cannot safely be operated with these liquid gas solvents.

Xenon has a critical point of 15.9 degrees Celsius and 841 psi and it is indeed theoretically possible that the SFT-10 SCF pump can pump this fluid. However, the solvating properties are similar enough to warrant using SCF CO2 over … Continue reading →

The 5 micron discs typically have loose tolerances from our supplier (meaning they tend to fall out like you are experiencing, because they are slightly smaller than the slot for them to fit in within the sample vessel cover). What … Continue reading →

The term a “cyclonic separator” is used to designate a type of collection assembly that allows the material that has been extracted from the sample vessel to be collected through running the outlet tubing of the sample vessel/back pressure regulator … Continue reading →

Supercritical Fluid Technologies employs various types of pumping packages for their SFE units. Our analytical scale SFT-110 and SFT-110XW SFE units employ electrically driven pulseless pumps similar to traditional HPLC technology. However, the pump cools the liquid CO2 to 0 … Continue reading →

Applications for water as a process media range from subcritical water extraction to supercritical water oxidation to supercritical water reaction processes in this application niche. Supercritical Water Oxidation (SCWO) is among the most challenging applications of supercritical technology. Very high … Continue reading →

A variable restrictor, also known as a Back Pressure Regulator (BPR) is a key component in the successful application of supercritical fluid technology. You will note that all of our products have this key component. The restrictor valve allows for … Continue reading →

The “single ended” (SE) vessels only open on one end (one cap). The “double ended” (DE) sample vessels have vessel covers on both ends and can be opened on both ends. The smaller vessels are double ended to make it … Continue reading →

The SFT-10 SCF pump operates in a mode that once the CO2 tank regulator is opened, CO2 liquid will flow through the pump and equilibrate into the sample vessel to tank pressure (typically 750 psi given the vapor pressure of … Continue reading →

Remove the existing o-ring carefully. Be sure that you do not scratch the vessel’s o-ring groove surface with any tools. We recommend using a plastic or wood stick to remove existing o-ring. Clean all surfaces thoroughly with solvent. Clean the … Continue reading →

The “over temperature” logic controller keeps the vessel’s outer wall temperature from getting extremely hot and, in turn, going beyond the internal set temperature of the sample vessel. For example, if you have an internal vessel temperature set to 40oC, … Continue reading →

Supercritical Fluid Technologies, Inc. offers a wide variety of sample vessels and options to meet our clients’ needs. Vessels ranging from 5 ml up to 5000 ml are available for our standard bench scale units. 20 liter and larger vessels … Continue reading →

A liquid CO2 pre-heater is recommended for all extraction work. Regardless of vessel size and despite the use of band heaters, heating efficiency is limited because of the relatively small vessel surface area relative to the total vessel volume. Especially … Continue reading →

A small amount of a co-solvent increases the ability of supercritical carbon dioxide to dissolve polar compounds.  Neat supercritical CO2 has dissolving properties similar to hexane.  This means that, by itself, carbon dioxide is very good for dissolving relatively non-polar … Continue reading →

The chiller eliminates the need for helium headspace carbon dioxide tanks. The action of pumping heats up the liquid carbon dioxide causing the liquid carbon dioxide to flash in the pumping head to gas. This results in cavitations and low … Continue reading →