Patents by Inventor Roger P. Van Driesen

Roger P. Van Driesen 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).

  • Solid addition and withdrawal
    Patent number: 5021147
    Abstract: A system for adding and withdrawing solids to a high pressure reactor wherein there is provided improved control of flow and concentrations of a slurry of solids in a transport oil for introducing and withdrawing solids from the reactor. In addition, there is provided for improved heating and cooling of the solids.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: June 4, 1991
    Assignee: Abb Lummus Crest, Inc.
    Inventors: Roger P. Van Driesen, William R. Adams, Mario Baldasarri, John Caspers, Harold Trimble
  • Solid addition and withdrawal
    Patent number: 4875995
    Abstract: A system for adding and withdrawing solids to a high pressure reactor wherein there is provided improved control of flow and concentrations of a slurry of solids in a transport oil for introducing and withdrawing solids from the reactor. In addition, there is provided for improved heating and cooling of the solids.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: October 24, 1989
    Assignee: Lummus Crest, Inc.
    Inventors: Roger P. Van Driesen, William R. Adams, Mario Baldasarri, John Caspers, Harold Trimble
  • High severity visbreaking with recycle
    Patent number: 4846958
    Abstract: The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and recycling treated product.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: July 11, 1989
    Assignee: Lummus Crest, Inc.
    Inventors: Robert J. Feldman, Andrei Rhoe, Roger P. Van Driesen, Joseph F. Puzio, Vincent A. Strangio
  • High severity visbreaking
    Patent number: 4773986
    Abstract: The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and provide a remaining product having a Shell Hot Filtration number of less than 0.25.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: September 27, 1988
    Assignee: Lummus Crest, Inc.
    Inventors: Robert J. Feldman, Andrei Rhoe, Roger P. Van Driesen, Joseph F. Puzio, Vincent A. Strangio
  • Treatment of feed for high severity visbreaking
    Patent number: 4767521
    Abstract: Prior to upgrading a viscous feed by visbreaking, at least a portion of the feed is treated to remove a heavy phase in specified amounts, whereby the severity of the visbreaking may be increased. The Shell Hot Filtration number of the visbreaking product is reduced by at least 75%, compared to visbreaking of untreated feed at some severity.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: August 30, 1988
    Assignee: Lummus Crest, Inc.
    Inventors: Robert J. Feldman, James M. Chen, Andrei Rhoe, Roger P. Van Driesen, C. Bertil Fogman, Donald P. Satchell
  • Solid addition and withdrawal
    Patent number: 4744887
    Abstract: A system for adding and withdrawing solids to a high pressure reactor wherein there is provided improved control of flow and concentrations of a slurry of solids in a transport oil for introducing and withdrawing solids from the reactor. In addition, there is provided for improved heating and cooling of the solids.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: May 17, 1988
    Assignee: Lummus Crest Inc.
    Inventors: Roger P. Van Driesen, William R. Adams, Mario Baldasarri, John Caspers, Harold Trimble
  • Pump seal oil system
    Patent number: 4734266
    Abstract: A pump seal oil system for a reactor pump wherein seal oil is provided at a pre-determined rate of flow without changing the rate of flow in response to pressure differences between the seal oil in the pump and the reactor pressure. Seal oil is provided at a first rate when the reactor pump is in operation and at a second higher rate when the reactor pump is not in operation.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: March 29, 1988
    Assignee: Lummus Crest, Inc.
    Inventors: Roger P. Van Driesen, Bhaven Chakravarti
  • Upgrading of high boiling hydrocarbons
    Patent number: 4686028
    Abstract: A feed is subjected to deasphalting to separately recover oil, resin and pitch. The resin fraction is upgraded to valuable product, for example, by hydrogenation or visbreaking, and heavier components from the upgrading are recycled to the deasphalting for removing pitchlike components prior to being recycled to the upgrading step.
    Type: Grant
    Filed: April 5, 1985
    Date of Patent: August 11, 1987
    Inventors: Roger P. Van Driesen, John R. Friday
  • Control of bed expansion in expanded bed reactor
    Patent number: 4684456
    Abstract: In an expanded bed reactor, the expansion of the bed is automatically controlled by automatically changing the rate of speed of a recycle pump for the reactor. The bed is preferably provided with both high and low level bed detectors, and a further detector for determining abnormally high levels.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: August 4, 1987
    Assignee: Lummus Crest Inc.
    Inventors: Roger P. Van Driesen, William R. Adams, John Caspers, Mario Baldasarri, Harold Trimble
  • Hydrogenation of high boiling hydrocarbons
    Patent number: 4411768
    Abstract: In a hydrogenation operation employing an ebullated catalytic bed, recycle is recovered from the hydrogenated product with at least 25%, by volume, of the recycle boiling above 950.degree. F. The recycle is cooled to a temperature of from 350.degree. to 600.degree. F. to separate coke precursors, prior to recycle to the hydrogenation. Higher conversion levels can be achieved by effecting recycle in such manner.
    Type: Grant
    Filed: April 21, 1982
    Date of Patent: October 25, 1983
    Assignee: The Lummus Company
    Inventors: Harold Unger, Morgan C. Sze, Roger P. Van Driesen