Patents by Inventor Ralph M. Dessau

Ralph M. Dessau 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).

  • Dehydrogenation and dehydrocyclization using a non-acidic NU-87 catalyst
    Patent number: 5254787
    Abstract: A catalytic dehydrogenation and/or dehydrocyclization of paraffins.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: October 19, 1993
    Assignee: Mobil Oil Corp.
    Inventor: Ralph M. Dessau
  • Hydrogen regeneration of monofunctional dehydrogenation and aromatization catalysts
    Patent number: 5200375
    Abstract: The process is a hydrogen regeneration of spent Group VIII metal modified non-acidic microporous crystalline materials employed as catalysts in dehydrogenation and dehydrocyclization.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: April 6, 1993
    Assignee: Mobil Oil Corporation
    Inventor: Ralph M. Dessau
  • Tin-colating microporous crystalline materials and their use as dehydrogenation, dehydrocyclization reforming catalysts
    Patent number: 5192728
    Abstract: Group VIII metal modified non-acidic tin containing microporous crystalline materials which in catalysis exhibit high selectivity for dehydrogenation and dehydrocyclization are described.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: March 9, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, Ernest W. Valyocsik, James C. Vartuli
  • Titania containing dehydrogenation catalysts
    Patent number: 5147837
    Abstract: The aging properties of Group VIII metal modified non-acidic microporous crystalline materials which in catalysis exhibit high selectivity for dehydrogenation and dehydrocyclization are improved by the incorporation therein of titanium and/or titania.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: September 15, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, Ying-Yen P. Tsao
  • Production of mono-substituted alkylaromatics from C.sub.8 +N-paraffins
    Patent number: 5124497
    Abstract: A process for producing monosubstituted monoalkylaromatics from C.sub.8 +n-paraffins-containing feeds, by contacting the feeds with a non-acid catalyst comprising a microporous crystalline material containing tin, indium, thallium or lead, is disclosed.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: June 23, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, Ernest W. Valyocsik, Randall D. Partridge
  • Non-acidic dehydrogenation catalyst of enhanced stability
    Patent number: 5122489
    Abstract: A metal selected from the group consisting of ruthenium, iridium or rhenium on non-acidic microporous crystalline materials also containing a dehydrogenation/hydrogenation metal enhances the aging characteristics and stability of the base catalyst.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: June 16, 1992
    Assignee: Mobil Oil Corporation
    Inventor: Ralph M. Dessau
  • Low acidity catalyst for conversion of paraffins to olefins and/or aromatics
    Patent number: 5108969
    Abstract: A low acidity Group VIII metal-containing zeolite MCM-22 catalyst, said zeolite exhibiting an Alpha value of not greater than about 150, is provided for conversion of aliphatic C.sub.2 to C.sub.12 hydrocarbon(s) to olefin(s) and/or aromatic(s).
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: April 28, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Kenneth J. Del Rossi, Ralph M. Dessau, Albin Huss, Jr., Garry W. Kirker, David O. Marler, Randall D. Partridge
  • Dehydrogenation of alcohols over non-acidic metal-zeolite catalysts
    Patent number: 5103066
    Abstract: The invention relates to a catalytic dehydrogenation of alcohols to produce ketones and/or aldehydes. The catalyst comprises a dehydrogenation metal and a non-acidic microporous crystalline material as a support. The support may contain indium, tin, thallium or lead, when the dehydrogenation metal is a Group VIII metal.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: April 7, 1992
    Assignee: Mobil Oil Corp.
    Inventor: Ralph M. Dessau
  • Crystalline molecular sieve compositions MCM-37
    Patent number: 5091073
    Abstract: This invention relates to a novel synthetic crystalline molecular sieve composition, MCM-37, which may contain framework +3 valence element, e.g. aluminum, and +5 valence element, e.g. phosphorus or with an addition +4 valence element, e.g. silicon, and to use thereof as a support and in catalytic conversion of organic compounds. The crystalline composition of this invention can easily be converted to catalytically active material.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: February 25, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Clarence D. Chang, Cynthia T. W. Chu, Ralph M. Dessau, John B. Higgins, John D. Lutner, John D. Schlenker
  • Integrated low pressure aromatization process
    Patent number: 5037529
    Abstract: High purity benzene and high octane alkylaromatic gasoline can be obtained via a dual stage reforming process utilizing a non-acidic Group VIII metal containing microporous crystalline silicate catalyst in the first stage followed by first stage effluent treatment over acidic zeolite catalyst operating under conditions in the second stage to upgrade the first stage effluent in RON, in aromatic content or both.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: August 6, 1991
    Assignee: Mobil Oil Corp.
    Inventors: Ralph M. Dessau, Randall D. Partridge, Sharon B. McCullen, Nai Y. Chen
  • Base-catalyzed reactions using zeolite catalysts
    Patent number: 5026919
    Abstract: Basic intermediate or large pore zeolites having a Constraint Index less than 12 are useful as catalysts in the dehydrogenation-aromatization of cyclie dienes, in the isomerization of olefins and in the aldol condensation, and particularly in the cyclization of acetonylacetone to 3-methyl-2-cyclopenten-1-one.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: June 25, 1991
    Assignee: Mobil Oil Corporation
    Inventor: Ralph M. Dessau
  • Process for the conversion of paraffins to olefins and/or aromatics and low acidity zeolite catalyst therefor
    Patent number: 5019664
    Abstract: Aliphatic C.sub.2 to C.sub.12 hydrocarbon(s) are converted to olefin(s) and/or aromatic(s) in the presence of a low acidity Group VIII metal-containing zeolite MCM-22 catalyst, said zeolite exhibiting an Alpha value of not greater than about 150.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: May 28, 1991
    Assignee: Mobil Oil Corp.
    Inventors: Kenneth J. Del Rossi, Ralph M. Dessau, Albin Huss, Jr., Garry W. Kirker, David O. Marler, Randall D. Partridge
  • Reforming and dehydrocyclization
    Patent number: 5013423
    Abstract: Improved, dehydrocyclization and low-pressure reforming processes based on a non-acidic metal containing crystalline microporous indium catalyst, in which the feed is rich in C.sub.6 -C.sub.7 low octane hydrocarbons, such as paraffins, and in which the reformate has increased aromatic content and increased octane value over that of the feed are disclosed.
    Type: Grant
    Filed: January 11, 1989
    Date of Patent: May 7, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Nai Y. Chen, Ralph M. Dessau, Randall D. Partride, Ernest W. Valyocsik
  • Dehydrogenation, dehydrocyclization and reforming catalyst
    Patent number: 5011805
    Abstract: The invention relates to catalytic treatment of paraffin feeds to alter the hydrogen content of the feed, for example, by producing effluents the aromatic content of which exceeds that of the feed in which the catalyst is a non-acidic composition containing a strong dehydrogenation/hydrogenation metal and zeolite beta in non-acidic form.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: April 30, 1991
    Assignee: Mobil Oil Corporation
    Inventor: Ralph M. Dessau
  • Tin-containing microporous crystalline materials and their use as dehydrogenation, dehydrocyclization and reforming catalysts
    Patent number: 4990710
    Abstract: Group VIII metal modified non-acidic tin containing microporous crystalline materials which in catalysis exhibit high selectively for dehydrogenation and dehydrocyclization are described.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: February 5, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, Ernest W. Valyocsik, James C. Vartuli
  • Dehydrogenation and dehydrocyclization catalyst
    Patent number: 4982028
    Abstract: Non-acid microporous crystalline indium containing materials are combined with Group VIII metal such as platinum to produce catalysts which exhibit high selectivity for dehydrocyclization of C.sub.5.sup.+ paraffins and which exhibit little, if any, cracking activity for hexane and heptane.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: January 1, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, Ernest W. Valyocsik
  • Process for the conversion of paraffins to olefins and/or aromatics and non-acidic zeolite catalyst therefor
    Patent number: 4962250
    Abstract: Aliphatic C.sub.2 to C.sub.12 hydrocarbon(s) are converted to olefin(s) and/or aromatic(s) in the presence of an essentially non-acidic Group VIII metal species-containing zeolite MCM-22 catalyst.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: October 9, 1990
    Assignee: Mobile Oil Corp.
    Inventors: Ralph M. Dessau, Randall D. Partridge
  • Dehydrocyclization and reforming process
    Patent number: 4935566
    Abstract: An improved, low-pressure dehydrocyclization and/or reforming process based on a non-acidic metal containing crystalline microporous tin catalyst, in which the feed is rich in low octane hydrocarbons, such as paraffins, and in which the product has increased aromatic content and increased octane value over that of the feed.
    Type: Grant
    Filed: January 11, 1989
    Date of Patent: June 19, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, Randall D. Partridge, Ernest W. Valyocsik, James C. Vartuli
  • Thallium or lead-containing microporous crystalline materials and their use as dehydrogenation dehydrocyclization and reforming catalysts
    Patent number: 4931416
    Abstract: Crystalline microporous thallium or lead containing silicate isostructural with zeolites, as catalysts, exhibit high selectivity for dehydrogenation, dehydrocyclization, and reforming.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: June 5, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, Ernest W. Valyocsik
  • Dehydrogenation, dehydrocyclization and reforming catalyst
    Patent number: 4929792
    Abstract: The invention relates to catalytic treatment of paraffin feeds to alter the hydrogen content of the feed, for example, by producing effluents the aromatic content of which exceeds that of the feed in which the catalyst is a non-acidic composition containing a strong dehydrogenation/hydrogenation metal and zeolite beta in non-acidic form.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: May 29, 1990
    Assignee: Mobil Oil Corporation
    Inventor: Ralph M. Dessau