Supercritical Fluid Extraction Apparatus for the Mineral Processing Laboratory.
Tolley-WK; Altringer-PB; Crane-SR; Seidel-DC
Metall Soc AIME 1986 :885-889
Supercritical fluids are being investigated extensively as solvents to selectively extract valuable components from complex matrices. Practical systems usually operate at temperatures of ambient to a few hundred degrees celsius and pressures of 70 atm or more. Common supercritical fluids are inert, cheap, and nontoxic. Laboratory apparatus for research on the extraction of minerals and related materials with supercritical solvents can be difficult to assemble and operate smoothly. The Bureau of Mines has successfully operated a 100-ml, flow-through, supercritical extraction autoclave capable of processing both liquid and solid samples at pressures and temperatures to 400 atm and 250 deg. C. Data are presented to indicate areas where supercritical fluid extraction could benefit the metals industry.
Metall. Soc. AIME, 1986, PP. 885-889