ROSE
ROSE : (1) Residuum Oil Supercritical Extraction. A process for extracting asphaltenes and resins from petroleum residues, using supercritical propane or isobutane as the extractant. (2) Rose. A process for extracting gold from the residues from zinc production. The residues are fused with a mixture of borax and silica, and air blown through. The base metals oxidize and pass into the slag