Patents by Inventor Darush Farshid

Darush Farshid 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).

  • Publication number: 20070138055
    Abstract: Applicants have developed a new residuum full hydroconversion slurry reactor system that allows the catalyst, unconverted oil and converted oil to circulate in a continuous mixture throughout an entire reactor with no confinement of the mixture. The mixture is partially separated in between the reactors to remove only the products and hydrogen gas, while permitting the unconverted oil and the slurry catalyst to continue on into the next sequential reactor. A portion of the unconverted oil is then converted to lower boiling point hydrocarbons, once again creating a mixture of unconverted oil, products, hydrogen, and slurry catalyst. Further hydroprocessing may occur in additional reactors, fully converting the oil. Additional oil may be added at the interstage feed inlet, possibly in combination with slurry. The oil may alternately be partially converted, leaving a highly concentrated catalyst in unconverted oil which can be recycled directly to the first reactor.
    Type: Application
    Filed: December 16, 2005
    Publication date: June 21, 2007
    Inventors: Darush Farshid, Bruce Reynolds
  • Publication number: 20070138056
    Abstract: Applicants have developed a new residuum full hydroconversion slurry reactor system that allows the catalyst, unconverted oil, hydrogen, and converted oil to circulate in a continuous mixture throughout an entire reactor with no confinement of the mixture. The mixture is separated internally, within one of more of the reactors, to separate only the converted oil and hydrogen into a vapor product while permitting the unconverted oil and the slurry catalyst to continue on into the next sequential reactor as a liquid product. A portion of the unconverted oil is then converted to lower boiling point hydrocarbons in the next reactor, once again creating a mixture of unconverted oil, hydrogen, converted oil, and slurry catalyst. Further hydroprocessing may occur in additional reactors, fully converting the oil. The oil may alternately be partially converted, leaving a concentrated catalyst in unconverted oil which can be recycled directly to the first reactor.
    Type: Application
    Filed: December 16, 2005
    Publication date: June 21, 2007
    Inventors: Darush Farshid, James Murphy, Bruce Reynolds
  • Publication number: 20070138058
    Abstract: A new residuum full hydroconversion slurry reactor system has been developed that allows the catalyst, unconverted oil, products and hydrogen to circulate in a continuous mixture throughout an entire reactor with no confinement of the mixture. The mixture is partially separated in between the reactors to remove only the products and hydrogen while permitting the unconverted oil and the slurry catalyst to continue on into the next sequential reactor. In the next reactor, a portion of the unconverted oil is converted to lower boiling point hydrocarbons, once again creating a mixture of unconverted oil, products, hydrogen and slurry catalyst. Further hydroprocessing may occur in additional reactors, fully converting the oil. The oil may alternately be partially converted, leaving a highly concentrated catalyst in unconverted oil which can be recycled directly to the first reactor. The slurry reactor system is, in this invention, preceded by an in-line pretreating step, such as hydrotreating or deasphalting.
    Type: Application
    Filed: December 16, 2005
    Publication date: June 21, 2007
    Inventors: Darush Farshid, Bruce Reynolds
  • Publication number: 20070138057
    Abstract: The instant invention is directed to a new residuum full hydroconversion slurry reactor system that allows the catalyst, unconverted oil and converted oil to circulate in a continuous mixture throughout an entire reactor with no confinement of the mixture. The mixture is partially separated in between the reactors to remove only the products and hydrogen, while permitting the unconverted oil and the slurry catalyst to continue on into the next sequential reactor where a portion of the unconverted oil is converted to lower boiling point hydrocarbons, once again creating a mixture of unconverted oil, converted oil, and slurry catalyst. Further hydroprocessing may occur in additional reactors, fully converting the oil. The oil may alternately be partially converted, leaving a highly concentrated catalyst in unconverted oil which can be recycled directly to the first reactor.
    Type: Application
    Filed: December 16, 2005
    Publication date: June 21, 2007
    Inventors: Darush Farshid, Bruce Reynolds
  • Publication number: 20060131211
    Abstract: The present invention relates to the field of hydroprocessing, and more particularly relates to a process directed to fuels hydrocracking and distillate feed hydrofining. This process has at least two stages. A relatively unconverted hydrofined product may be removed prior to the second stage, providing flexibility. In another embodiment, fresh feed may be added prior to the second stage. In both embodiments, fuels production is maintained at a constant level.
    Type: Application
    Filed: December 16, 2004
    Publication date: June 22, 2006
    Inventors: Ujjal Mukherjee, Kevin Hofer, Darush Farshid
  • Publication number: 20050103683
    Abstract: The present invention is directed to a method for hydroprocessing Fischer-Tropsch products. The invention in particular relates to an integrated method for producing liquid fuels from a hydrocarbon stream provided by Fischer-Tropsch synthesis. The method involves separating the Fischer-Tropsch products into a light fraction (FT condensate) and a heavy fraction. The heavy fraction is subjected to hydrocracking conditions, preferably through multiple catalyst beds, to reduce the chain length. The products of the hydrocracking reaction following the last catalyst bed are subjected to a separation step. The lighter material is combined with the Fischer-Tropsch condensate and hydrotreated. The hydrotreatment conditions hydrogenate double bonds, reduce oxygenates to paraffins, and desulfurize and denitrify the products. The heavier material from the separation step is sent to the lube plant for hydroisomerization, or is subjected to subsequent fraction steps to produce fuels and middle distillates.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 19, 2005
    Inventors: Darush Farshid, Richard Moore
  • Publication number: 20050092653
    Abstract: An integrated process for producing Fischer-Tropsch derived products boiling in the range of liquid fuel and lubricating base oil which comprises (a) recovering separately from a Fischer-Tropsch synthesis reactor a Fischer-Tropsch wax and a Fischer-Tropsch condensate; (b) hydroprocessing the Fischer-Tropsch wax in a wax hydroprocessing zone by contacting the Fischer-Tropsch wax with a hydroprocessing catalyst in the presence of hydrogen under hydroprocessing conditions and recovering from the wax hydroprocessing zone a waxy intermediate and a hydrogen-rich normally liquid fraction; (c) mixing the Fischer-Tropsch condensate from step (a) and at least part of the hydrogen-rich normally liquid fraction from step (b) to form a Fischer-Tropsch condensate mixture; (d) hydrotreating the Fischer-Tropsch condensate mixture in a condensate hydrotreating zone by contacting the Fischer-Tropsch condensate mixture with a hydrotreating catalyst in the presence of hydrogen under hydrotreating conditions and recovering from t
    Type: Application
    Filed: November 5, 2003
    Publication date: May 5, 2005
    Inventors: Darush Farshid, Richard Moore
  • Patent number: 6787026
    Abstract: This invention is directed to a process for hydroprocessing vacuum gas oils and other feeds in order to produce unconverted oil suitable for use as base oil feed for white oils, Group III oils, and BMCI (Bureau of Mines Correlation Index) ethylene plant feed. Ammonia, hydrogen sulfide, and light products are removed from the first stage at high pressure in order to produce a higher quality of unconverted oil that is suitable for Group III base oils.
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: September 7, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventor: Darush Farshid
  • Publication number: 20040079677
    Abstract: This invention is directed to a process for hydroprocessing vacuum gas oils and other feeds in order to produce unconverted oil suitable for use as base oil feed for white oils, Group III oils, and BMCI (Bureau of Mines Correlation Index) ethylene plant feed. Ammonia, hydrogen sulfide, and light products are removed from the first stage at high pressure in order to produce a higher quality of unconverted oil that is suitable for Group III base oils.
    Type: Application
    Filed: October 28, 2002
    Publication date: April 29, 2004
    Inventor: Darush Farshid