Patents by Inventor Colin G. Grieves

Colin G. Grieves has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for treating sour water in oil refineries
    Patent number: 4746434
    Abstract: Sour process water from an oil refinery is partially treated by oil extraction. The partially treated water can be biologically treated, upgraded and further purified in a cooling tower, trickle filter, and/or activated sludge tank.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: May 24, 1988
    Assignee: Amoco Corporation
    Inventors: Colin G. Grieves, Robert J. Baechle, John M. Considine, Lawrence M. Bristow
  • Oil shale retorting and retort water purification process
    Patent number: 4585063
    Abstract: An oil shale process is provided to retort oil shale and purify oil shale retort water. In the process, raw oil shale is retorted in an in situ underground retort or in an above ground retort to liberate shale oil, light hydrocarbon gases and oil shale retort water. The retort water is separated from the shale oil and gases in a sump or in a fractionator or quench tower followed by an API oil/water separator. After the retort water is separated from the shale oil, the retort water is steam stripped, carbon adsorbed and biologically treated, preferably by granular carbon adsorbers followed by activated sludge treatment or by activated sludge containing powdered activated carbon. The retort water can be granularly filtered before being steam stripped. The purified retort water can be used in various other oil shale processes, such as dedusting, scrubbing, spent shale moisturing, backfilling, in situ feed gas injection and pulsed combustion.
    Type: Grant
    Filed: September 27, 1984
    Date of Patent: April 29, 1986
    Assignee: Standard Oil Company (Indiana)
    Inventors: Dean G. Venardos, Colin G. Grieves
  • Oil shale retorting and retort water purification process
    Patent number: 4495056
    Abstract: An oil shale process is provided to retort oil shale and purify oil shale retort water. In the process, raw oil shale is retorted in an in situ underground retort or in an above ground retort to liberate shale oil, light hydrocarbon gases and oil shale retort water. The retort water is separated from the shale oil and gases in a sump or in a fractionator or quench tower followed by an API oil/water separator. After the retort water is separated from the shale oil, the retort water is steam stripped, carbon adsorbed and biologically treated, preferably by granular carbon adsorbers followed by activated sludge treatment or by activated sludge containing powdered activated carbon. The retort water can be granularly filtered before being steam stripped. The purified retort water can be used in various other oil shale processes, such as dedusting, scrubbing, spent shale moisturing, backfilling, in situ feed gas injection and pulsed combustion.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: January 22, 1985
    Assignees: Standard Oil Company (Indiana), Gulf Oil Corporation
    Inventors: Dean G. Venardos, Colin G. Grieves