Patents Represented by Attorney W. L. Stumpf

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  • Fluid-contacting process
    Patent number: 4330397
    Abstract: A fluid-contacting process wherein fluid is contacted with convex and polylobal particles, the contacting stopped, a mixture of the particles formed and subsequently separated by screening. Also disclosed is a catalytic conversion process wherein a reaction is carried out in the presence of convex and polylobal catalysts, the reacting stopped, the catalysts withdrawn as a physical mixture from which one of the catalysts is separated, regenerated and returned to the process.
    Type: Grant
    Filed: December 1, 1978
    Date of Patent: May 18, 1982
    Assignee: Chevron Research Company
    Inventor: Robert P. Sieg
  • Lubricating oil stabilization
    Patent number: 4325805
    Abstract: An improved process for stabilizing catalytically dewaxed hydrocracked lubricating oils to ultraviolet radiation using a nickel-tin catalyst is disclosed.
    Type: Grant
    Filed: December 18, 1980
    Date of Patent: April 20, 1982
    Assignee: Chevron Research Company
    Inventor: Stephen J. Miller
  • Hydrocarbon conversion with crystalline silicates to produce olefins
    Patent number: 4309275
    Abstract: A process for selectively converting adsorbable hydrocarbon feeds containing straight-chain and slightly branched-chain hydrocarbons to olefins by contacting the feeds with crystalline silicates.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: January 5, 1982
    Assignee: Chevron Research Company
    Inventor: Bernard F. Mulaskey
  • Hydrocarbon conversion with low-sodium silicalite
    Patent number: 4309276
    Abstract: Hydrocarbon conversion in the presence of a low-sodium form crystalline silicate converts normal and slightly branched paraffins, at least in part, to olefins.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: January 5, 1982
    Assignee: Chevron Research Company
    Inventor: Stephen J. Miller
  • Petroleum distillate upgrading process
    Patent number: 4282085
    Abstract: A petroleum distillate feed is upgraded and a substantial C.sub.3 -C.sub.4 olefin product fraction produced by contacting the feed with ZSM-5 type zeolite at (1) a temperature in the 500.degree.-800.degree. F. range, (2) a pressure below about 13 atmospheres gauge, and (3) an LHSV in the 0.1-15 V/V/Hr range, and fractionating the effluent product stream.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: August 4, 1981
    Assignee: Chevron Research Company
    Inventors: Dennis J. O'Rear, Jerome F. Mayer
  • Extended cycle regenerative reforming
    Patent number: 4255250
    Abstract: A multiple zone catalytic reforming process in which the C.sub.5 + yield or the catalyst run length in all reaction zones downstream of the first is increased by maintaining less than 1 weight percent coke on the catalyst in the first reaction zone by adjusting the frequency of regeneration or replacement.
    Type: Grant
    Filed: May 23, 1979
    Date of Patent: March 10, 1981
    Assignee: Chevron Research Company
    Inventor: Charles S. McCoy
  • Petroleum distillate upgrading process
    Patent number: 4251348
    Abstract: A petroleum distillate feed is upgraded and a substantial C.sub.3 -C.sub.4 olefin product fraction produced by contacting the feed with ZSM-5 type zeolite at (1) a temperature in the 500.degree.-800.degree. F. range, (2) a pressure below about 13 atmospheres gauge, and (3) an LHSV in the 0.1-15 V/V/Hr range, and fractionating the effluent product stream.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: February 17, 1981
    Assignee: Chevron Research Company
    Inventors: Dennis J. O'Rear, Jerome F. Mayer
  • Fixed-bed reforming with mid-cycle catalyst addition
    Patent number: 4251349
    Abstract: A fixed-bed catalytic reforming process in which on-stream operation is begun with the catalyst retention volume in the first reactor less than 99% full and additional catalyst is added to said reactor while on-stream.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: February 17, 1981
    Assignee: Chevron Research Company
    Inventors: Charles S. McCoy, Robert J. Houston
  • Isomerization process for upgrading low-octane light paraffinic feeds using a chlorided platinum-alumina-rhenium catalyst
    Patent number: 4241231
    Abstract: Isomerizable light paraffinic hydrocarbon feeds are isomerized in an improved process using a particular super-chlorided reforming catalyst under isomerizing conditions. A chloride source in the feed stabilizes the catalyst. This process provides for a material octane improvement of the feed without excessive loss thereof to normally gaseous hydrocarbons.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: December 23, 1980
    Assignee: Chevron Research Company
    Inventors: Kirk R. Gibson, Robert L. Jacobson, Manfred J. Michlmayr