Patents by Inventor John Hazen

John Hazen 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: 5837640
    Abstract: A naphtha or a middle distillate hydrocarbon is dehydroaromatized by hydrotreating in the presence of a catalyst containing non-noble Group VIII metal and Group VI-B metal on carbon.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: November 17, 1998
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Frank Dolfinger, Jr., Dennis Joseph Rao, John Hazen
  • Patent number: 5523510
    Abstract: A process of converting linear olefins to branched olefins by a skeletal isomerization reaction wherein said reaction is carried out at a temperature of between about 300.degree. C. and about 650.degree. C., under a pressure of between about 0.1 and about 100 atmospheres and a space velocity of said linear olefins of between about 0.1 and about 40 WHSV in the presence of a steamed then acid washed zeolite ferrierite catalyst.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: June 4, 1996
    Assignee: Texaco Inc.
    Inventors: Regis J. Pellet, Chi-Lin O'Young, John Hazen, Alison E. Hadowanetz, James E. Browne
  • Patent number: 5510560
    Abstract: The method of converting n-butylenes to isobutylene by a skeletal isomrization reaction wherein said reaction is carried out at a temperature of between 300.degree. C. and 650.degree. C., under a pressure of between 0.1 and 100 atmospheres and a space velocity of said n-butylenes of between 0.1 and 40 WHSV using a cagalyst comprising a zeolite binder selected frm the group consisting of alumina, silica, silica-alumina, clay and a combination thereof, said catalyst having a pore size of at least about 4.5 angstroms and the pore size structure is characteried by intersecting 10-member ring and 8-member ring channels.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: April 23, 1996
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, Regis J. Pellet, Alison E. Hadowanetz, John Hazen, James E. Browne
  • Patent number: 5491276
    Abstract: The conversion of normal olefins such as n-butylenes can be converted to branched olefin species such as isobutylene by skeletal isomerization over zeolite-based catalysts having pore sizes of at least about 4.5 Angstroms and a pore structure characterized by intersecting 10-MR and 8 MR channels. The zeolite-based catalysts have sufficient acidity to catalyze the skeletal isomerization of normal olefins. The catalysts can be used to produce isoolefins for reaction with alcohols in integrated processes to produce alkyl tertiary alkyl ethers such as MTBE.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: February 13, 1996
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, Regis J. Pellet, Alison E. Hadowanetz, John Hazen, James E. Browne
  • Patent number: 5435907
    Abstract: A naphtha or a middle distillate hydrocarbon is dehydroaromatized by hydrotreating in the presence of a catalyst containing non-noble Group VIII metal and Group VI-B metal on carbon.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: July 25, 1995
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Frank Dolfinger, Jr., Dennis J. Pao, John Hazen
  • Patent number: 5227569
    Abstract: Normal olefins such as n-butenes can be converted to iso olefins such as isobutylene by skeletal isomerization over catalysts of boron-beta zeolites having pore sizes of at least about 5 Angstroms and containing boron in the framework structure thereof. The boron-beta zeoliteS have sufficient acidity to catalyze the skeletal isomerization of normal olefinsto iso-olefins. The catalysts can be used to produce iso-olefins for reaction with alcohols in integrated processes to produce alkyl tertiary alkyl ethers such as MTBE.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: July 13, 1993
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, John Hazen, Daniel G. Casey
  • Patent number: 5198597
    Abstract: Normal olefins such as n-butenes and normal alkanes such as n-butane can be coverted to branched olefin species such as isobutylene by skeletal dehydroisomerization over catalysts preferably containing metals selected from Groups IB, IIB, IIIB, IVB, VB, VIB, VIIB, VIII and the rear earth elements which are deposited upon borosilicate zeolites having pore sizes of at least about 5 Angstroms and containing boron in the framework structure thereof. The borosilicates have sufficient acidity to catalyze the skeletal isomerization of both normal alkanes and normal olefins. The catalysts can be used to produce isoolefins for reaction with alcohols in integrated processes to produce alkyl tertiary alkyl ethers such as MTBE.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: March 30, 1993
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, James E. Browne, John F. Matteo, Robert A. Sawicki, John Hazen