Patents by Inventor Guan Dao Lei

Guan Dao Lei 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).

  • Patent number: 6933323
    Abstract: The present invention relates to a stable, low sulfur, olefinic distillate fuel blend component derived from a Fischer-Tropsch process and a process for producing this stable, low sulfur, olefinic distillate fuel blend component. The stable, low sulfur, olefinic distillate fuel comprises olefins in an amount of 2 to 80 weight percent, non-olefins in an amount of 20 to 98 weight percent wherein the non-olefins are predominantly paraffins, oxygenates in an amount of less than 1 weight percent, and sulfur in an amount of less than 10 ppm by weight. A distillate fuel comprising the above blend component forms less than 5 ppm peroxides after storage at 60° C. for four weeks.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: August 23, 2005
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis J. O'Rear, Guan Dao Lei
  • Patent number: 6872752
    Abstract: The present invention relates to an olefinic naphtha and a process for producing lower olefinc from this naphtha. In the process of the present invention for producing lower olefins, preferably ethylene, at least a portion of a hydrocarbon asset is converted to synthesis gas and at least a portion of the synthesis gas is converted to an olefinic naphtha by a Fischer-Tropsch process. At least a portion of the olefinic naphtha is converted in a naphtha cracker to a product stream comprising lower olefins, and at least a portion of the lower olefins from the product stream of the cracker are recovered.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: March 29, 2005
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis J. O'Rear, Guan Dao Lei
  • Publication number: 20040267071
    Abstract: A process for oligomerizing the olefins present in a Fischer-Tropsch derived condensate containing a mixture of olefins and oxygenates which comprises (a) reducing significantly the oxygenates present in the Fischer-Tropsch condensate; (b) contacting the Fischer-Tropsch derived condensate having significantly reduced oxygenates with an ionic liquid catalyst in an oligomerization zone under oligomerization reaction conditions; and (c) recovering from the oligomerization zone a Fischer-Tropsch derived product having molecules characterized by a higher average molecular weight and increased branching as compared to the Fischer-Tropsch derived condensate.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Applicant: Chevron U.S.A. Inc.
    Inventors: Thomas V. Harris, Michael Cheng, Guan-Dao Lei
  • Publication number: 20040173500
    Abstract: The present invention relates to a stable, low sulfur, olefinic distillate fuel blend component derived from a Fischer-Tropsch process and a process for producing this stable, low sulfur, olefinic distillate fuel blend component. The stable, low sulfur, olefinic distillate fuel comprises olefins in an amount of 2 to 80 weight percent, non-olefins in an amount of 20 to 98 weight percent wherein the non-olefins are predominantly paraffins, oxygenates in an amount of less than 1 weight percent, and sulfur in an amount of less than 10 ppm by weight. A distillate fuel comprising the above blend component forms less than 5 ppm peroxides after storage at 60° C. for four weeks.
    Type: Application
    Filed: January 31, 2003
    Publication date: September 9, 2004
    Inventors: Dennis J. O'Rear, Guan Dao Lei
  • Publication number: 20040152792
    Abstract: The present invention relates to a stable, low sulfur, olefinic distillate fuel blend component derived from a Fischer-Tropsch process and a process for producing this stable, low sulfur, olefinic distillate fuel blend component. The stable, low sulfur, olefinic distillate fuel comprises olefins in an amount of 2 to 80 weight percent, non-olefins in an amount of 20 to 98 weight percent wherein the non-olefins are predominantly paraffins, oxygenates in an amount of less than 1 weight percent, and sulfur in an amount of less than 10 ppm by weight. A distillate fuel comprising the above blend component forms less than 5 ppm peroxides after storage at 60° C. for four weeks.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Dennis J. O'Rear, Guan Dao Lei
  • Publication number: 20040152933
    Abstract: The present invention relates to an olefinic naphtha and a process for producing lower olefinc from this naphtha. In the process of the present invention for producing lower olefins, preferably ethylene, at least a portion of a hydrocarbon asset is converted to synthesis gas and at least a portion of the synthesis gas is converted to an olefinic naphtha by a Fischer-Tropsch process. At least a portion of the olefinic naphtha is converted in a naphtha cracker to a product stream comprising lower olefins, and at least a portion of the lower olefins from the product stream of the naphtha cracker are recovered.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Dennis J. O'Rear, Guan Dao Lei
  • Publication number: 20040149626
    Abstract: The present invention relates to an olefinic naphtha and a process for producing lower olefinc from this naphtha. In the process of the present invention for producing lower olefins, preferably ethylene, at least a portion of a hydrocarbon asset is converted to synthesis gas and at least a portion of the synthesis gas is converted to an olefinic naphtha by a Fischer-Tropsch process. At least a portion of the olefinic naphtha is converted in a naphtha cracker to a product stream comprising lower olefins, and at least a portion of the lower olefins from the product stream of the cracker are recovered.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Dennis J. O'Rear, Guan Dao Lei
  • Publication number: 20040152793
    Abstract: The present invention relates to an olefinic naphtha and a process for producing lower olefinc from this naphtha. In the process of the present invention for producing lower olefins, preferably ethylene, at least a portion of a hydrocarbon asset is converted to synthesis gas and at least a portion of the synthesis gas is converted to an olefinic naphtha by a Fischer-Tropsch process. At least a portion of the olefinic naphtha is converted in a naphtha cracker to a product stream comprising lower olefins, and at least a portion of the lower olefins from the product stream of the cracker are recovered.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Dennis J. O'Rear, Guan Dao Lei