Patents by Inventor Roman Krycak

Roman Krycak 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).

  • Hydrotreating process
    Patent number: 8864980
    Abstract: A process for hydrotreating a first aromatics- and sulfur-containing hydrocarbon feed using a fresh supported CoMo catalyst, includes treating the fresh catalyst under first hydrotreating conditions with a second hydrocarbon feed having a lower aromatics content than the first feed.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: October 21, 2014
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Gabor Kiss, Iulian Nistor, John Zengel, Sabato Miseo, Roman Krycak, Teh C. Ho
  • HYDROTREATING PROCESS
    Publication number: 20130006029
    Abstract: A process for hydrotreating a first aromatics- and sulfur-containing hydrocarbon feed using a fresh supported CoMo catalyst, includes treating the fresh catalyst under first hydrotreating conditions with a second hydrocarbon feed having a lower aromatics content than the first feed.
    Type: Application
    Filed: February 21, 2011
    Publication date: January 3, 2013
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERINGCOMPANY
    Inventors: Gabor Kiss, Iulian Nistor, John Zengel, Sabato Miseo, Roman Krycak, Teh C. Ho
  • Hydroprocessing using bulk Group VIII/Group VIB catalysts
    Patent number: 7288182
    Abstract: A process for hydroprocessing petroleum and chemical feedstocks by use of a bulk multimetallic catalyst comprised of at least one Group VIII non-noble metal and at least one, preferably two Group VIB metal wherein the ratio of Group VIB metal to Group VIII metal is from about 10:1 to 1:10.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: October 30, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Stuart Leon Soled, Sabato Miseo, Roman Krycak, Hilda B. Vroman, Teh Chung Ho, Kenneth Lloyd Riley
  • Nickel molybodtungstate hydrotreating catalysts (law444)
    Patent number: 6299760
    Abstract: A hydrodenitrogenation catalyst is prepared by decomposing a nickel (ammonium) molybdotungstate precursor and sulfiding, either pre-use or in situ, the decomposition product.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: October 9, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Stuart L Soled, Sabato Miseo, Roman Krycak, Hilda Vroman, Teh C. Ho, Kenneth L. Riley
  • Nickel molybdotungstate hydrotreating catalysts
    Patent number: 6156695
    Abstract: A hydrodenitrogenation catalyst is prepared by decomposing a nickel (ammonium) molybdotungstate precursor and sulfiding, either pre-use or in situ, the decomposition product.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: December 5, 2000
    Assignee: Exxon Research and Engineering Company
    Inventors: Stuart L. Soled, Sabato Miseo, Roman Krycak, Hilda Vroman, Teh C. Ho, Kenneth L. Riley
  • Desulfurization process for removal of refractory organosulfur heterocycles from petroleum streams
    Patent number: 5897768
    Abstract: Hydrocarbon feeds are upgraded by contact of the stream under hydrodesulfurization (HDS) conditions with a catalyst system comprising a sulfided, transition metal promoted tungsten/molybdenum HDS catalyst, e.g., Ni/Co--Mo/Al.sub.2 O.sub.3 and a solid acid catalyst which is effective for the isomerization/disproportionation/transalkylation of alkyl substituted, condensed ring heterocyclic sulfur compounds present in the feedstream, e.g. zeolite or a heteropolyacid compound. Isomerization, disproportionation and transalkylation reactions convert refractory sulfur compounds such as 4- or 4,6-alkyl dibenzothiophenes into corresponding isomers or disproportionated isomers which can be more readily desulfurized by conventional HDS catalysts to H.sub.2 S and other products.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: April 27, 1999
    Assignee: Exxon Research and Engineering Co.
    Inventors: Gary B. McVicker, Teh C. Ho, Stuart Soled, Michel Daage, Roman Krycak, Sabato Miseo, Viktor Buchholz, William E. Lewis