Patents Assigned to Institute of Gas Tehnology
  • Patent number: 4692238
    Abstract: A process for recovery of organic oils and residues in association with inorganic solids by solvent extraction and for the recovery of solvent used for the extraction. The organic solvent extracted inorganic solids having remaining associated organic solvent is fluidized in a bed with fluidizing gas comprising superheated vapor of the organic solvent vaporizing and removing a substantial portion of the associated organic solvent. Then the solids are countercurrently contacted with a combustion gas stream at a lower temperature than the solids physically stripping a substantial portion of the residual solvent from the solids, the combustion gas stream being enhanced for combustion by comprising stripped organic solvent and by being heated.
    Type: Grant
    Filed: August 12, 1986
    Date of Patent: September 8, 1987
    Assignee: Institute of Gas Tehnology
    Inventors: William W. Bodle, Paul B. Tarman