Patents Represented by Attorney, Agent or Law Firm Richard D. Stone
  • Oxygenate analysis and control by Raman spectroscopy
    Patent number: 5596196
    Abstract: Oxygenated hydrocarbons can be predicted within .+-.0.2% wt or better, using Raman NIR spectroscopy and multivariate analysis, with optional fiberoptics multistreaming. The resulting signal can be used to control concentration of such compounds in product to desired levels.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: January 21, 1997
    Assignee: Ashland Inc.
    Inventors: John B. Cooper, Kent L. Wise, William T. Welch, Michael B. Sumner
  • FCC process and apparatus with contained vortex third stage separator
    Patent number: 5538696
    Abstract: Horizontal, small diameter cyclones are disclosed. Gas and fines are added tangentially around a clean vapor outlet tube in a cylindrical cyclone. A vortex of solids and some gas passes into a contiguous and axially aligned cylindrical vortex containment means from which solids are withdrawn via a horizontal slot. 0-5 micron particle removal is enhanced. An FCC process uses the cyclones as a third stage separator. An alternative design uses a half pipe extension on the solids outlet to confine the vortex of solids and gas.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: July 23, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Michael F. Raterman, Christopher G. Smalley
  • FCC catalyst stripper
    Patent number: 5531884
    Abstract: A fluidized catalytic cracking (FCC) process and apparatus uses a catalyst stripper with slant trays or shed trays having "downcomers". Downcomers, vertical catalyst/gas contacting elements, provide a vertical, countercurrent region for catalyst/stripping vapor contact. The downcomers improve stripping effectiveness.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: July 2, 1996
    Assignee: Mobil Oil Corporation
    Inventors: David L. Johnson, Richard C. Senior
  • Underflow cyclone with perforated barrel
    Patent number: 5514271
    Abstract: A cyclone and process for fluidized catalytic cracking of heavy oils is disclosed. Gas and entrained solids are added tangentially around a vapor outlet tube in a cylindrical tube cyclone body. Solids and some gas is withdrawn via a plurality of openings radially and longitudinally distributed in the cylindrical sidewall of the cyclone body. Distributed withdrawal replaces or reduces conventional underflow of solids from an end of cyclone outlet and reduces solids reentrainment. 0-5 micron particle removal is enhanced by reducing eddy formation and particle bouncing near the cyclone sidewall. The device may be used as an FCC regenerator third stage separator.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: May 7, 1996
    Assignee: Mobil Oil Corporation
    Inventors: John S. Buchanan, Christopher G. Smalley
  • Catalytic conversion of methanol to linear olefins
    Patent number: 5491273
    Abstract: This invention covers a process for converting a feed comprising at least one lower aliphatic alcohol having from 1 to 3 carbon atoms or a corresponding ether of such an alcohol to hydrocarbon products comprising linear olefins. The process comprises contacting the feed in a reaction zone with a catalyst comprising material having a large crystal ferrierite aluminosilicate structure. An effluent is withdrawn from the reaction zone, which comprises linear olefins. Linear olefins may then be separated from the effluent. The aliphatic alcohol having from 1 to 3 carbons is generally methanol and the preferred ether is dimethyl ether. ZSM-35 is the preferred large crystal ferrierite structure of this invention.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: February 13, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Jose G. Santiesteban, Clarence D. Chang, James C. Vartuli, David H. Olson
  • High pressure drop endothermic process
    Patent number: 5489724
    Abstract: Aliphatic feeds are converted to olefins and/or aromatics in a multi pressure reactor system. A high pressure first stage reactor generates much or all of the hydrogen needed to reduce catalyst coking in lower pressure downstream reactors. High pressure operation protects catalyst stability in the first reactor, while produced hydrogen helps protect downstream catalyst. Low pressure downstream operation improves yields.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: February 6, 1996
    Assignee: Mobil Oil Corporation
    Inventor: Mohsen N. Harandi
  • Catalytic cracking with MCM-49
    Patent number: 5486284
    Abstract: This invention relates to use of MCM-49 in catalytic cracking. Large amounts of light olefins are produced.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: January 23, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Thomas F. Degnan, Terry E. Helton, Daria N. Lissy
  • Alkylation with activated equilibrium FCC catalyst
    Patent number: 5481057
    Abstract: A process for catalytic cracking and C3/C4 olefin alkylation with phosphorus stabilized faujasite catalyst is disclosed. Catalytic cracking produces C3 and C4 olefins, which are alkylated using phosphorus stabilized and water activated cracking catalyst. Spent alkylation catalyst may be discharged into the FCC unit.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: January 2, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Weldon K. Bell, Tracy J. Huang, Rudolph M. Lago, Ying-Yen P. Tsao, D. Duayne Whitehurst
  • FCC process with upflow and downflow reactor
    Patent number: 5468369
    Abstract: A process and apparatus for short contact time fluidized catalytic cracking of heavy oil feed using a reactor with an upflow cat:oil vaporizer and a downflow reactor. Catalyst slip permits efficient mixing and limited conversion in the upflow section, while cracking is completed in the downflow reactor with minimal segregation of catalyst. FCC catalyst with more than 25 wt % Y zeolite content is preferred, and total vapor residence time should be less than 5 seconds.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: November 21, 1995
    Assignee: Mobil Oil Corporation
    Inventor: Gregory P. Muldowney
  • FCC process and apparatus with upset tolerant third stage separator
    Patent number: 5464528
    Abstract: An inertial/filtering separator in a single vessel and FCC process using same as a third stage separator are disclosed. Gas and fines are added tangentially to an annulus formed by a cylindrical insert in a vessel. Gas flows over the insert and down to filters in the vessel. Solids are withdrawn from the base of the annulus and periodically from the filter. Three types of solids collection--inertial, gravity settling and filtration--are practiced in a single vessel.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: November 7, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Hartley Owen, Paul H. Schipper
  • Naphthalene alkylation process using mixed H/NH3 form catalyst
    Patent number: 5457254
    Abstract: Long chain alkyl substituted naphthalenes are produced by alkylating naphthalene with an olefin or other alkylating agent with at least 6, and usually 12 to 20 carbon atoms, in the presence of an alkylation catalyst comprising a zeolite having both ammonium and protonic species associated with the exchangeable sites of the zeolite. The zeolite is usually a large pore size zeolite such as USY. The presence of both ammonium and protonic species increases selectivity for production of long chain mono-alkyl substituted naphthalenes in preference to more highly substituted products.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: October 10, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Susan C. Ardito, Henry Ashjian, Thomas F. Degnan, Terry E. Helton, Quang N. Le, Augusto R. Quinones
  • Catalytic cracking apparatus using regenerator with multiple catalyst outlets
    Patent number: 5427745
    Abstract: An improved process and apparatus are disclosed for fluidized catalytic cracking of hydrocarbons using a cross-flow or swirl type catalyst regenerator. Instead of a single catalyst withdrawal outlet for regenerated catalyst, multiple catalyst withdrawal points are provided. Use of multiple catalyst outlets, or a continuous radial catalyst outlet, greatly reduces stagnant regions in the bed.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: June 27, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Tiberiu M. Leib, Ajit V. Sapre
  • FCC process with fines tolerant SCR reactor
    Patent number: 5413699
    Abstract: A process for reducing NOx emissions and an FCC process using same as a flue gas cleanup stage are disclosed. Gas containing NOx and entrained catalyst fines is passed up through a bed of catalyst at a sufficient velocity to expand and fluidize the catalyst bed. Particulates deposited on the catalyst are abraided or elutriated away by fluidization, preventing fouling of the DeNOx catalyst. A low pressure drop design, with vertical, perforate gas distributors covered by the bed is also disclosed.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: May 9, 1995
    Assignee: Mobil Oil Corporation
    Inventor: Tai-Sheng Chou
  • FCC process and apparatus for cooling FCC catalyst during regeneration
    Patent number: 5409872
    Abstract: A process and apparatus for fluidized catalytic cracking (FCC) with cooling of FCC catalyst during regeneration in a baffled heat exchanger attached to the regenerator. The heat exchanger has a vertical baffle defining an inlet and an outlet side. Lift gas added to the outlet side induces flow from the regenerator, around the baffle and back to the regenerator. A symmetrical design, with reversing flow can equalize wear on heat exchanger tubes and permit selected cooling if the heat exchanger outlet is near the regenerated catalyst outlet.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: April 25, 1995
    Assignee: Mobil Oil Corporation
    Inventor: Michael F. Raterman
  • Catalytic cracking in two stages
    Patent number: 5401387
    Abstract: A process for multi-stage catalytic cracking is disclosed. A first stage cracks a first feed at atmospheric to 100 psig over a shape selective zeolite to convert from 10 to 90%, by volume, to lighter products rich in iso-compounds which may be used to make ethers. A second feed, which may include 700.degree. F.+ liquid from the selective cracking reaction, is cracked in a catalytic cracking (FCC) unit. Preferably all or some of the products from the shape selective cracking reactor are fractionated in the FCC main column.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: March 28, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Mohsen N. Harandi, Hartley Owen
  • Solids feeder with integrated supply of carrier gas
    Patent number: 5395597
    Abstract: An apparatus for fluidized transport of solids, e.g., catalyst to a pilot plant FCC unit. Carrier gas flow is generated by compressing a sealed bellows to displace gas and an exit tube attached to the bellows into a solids reservoir. A confinement baffle in the solids reservoir controls solids flow and aids refilling. An auxiliary breather tube with an outlet in the solids reservoir can fluidize solids as the bellows expands.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: March 7, 1995
    Assignee: Mobil Oil Corporation
    Inventors: John S. Buchanan, Hans J. Schoennagel
  • Riser cracking for maximum C3 and C4 olefin yields
    Patent number: 5389232
    Abstract: A process for catalytically cracking a heavy feed in a single riser reactor FCC unit, with delayed riser quench and large amounts of shape selective cracking additive is disclosed. The feed is preferably quenched after at least 1 second of riser cracking. The catalyst inventory preferably contains over 3.0 wt % ZSM-5 cystal, in the form of an additive of 12-40% ZSM-5 on an amorphous support. Quenching with recycled LCO is preferred. Delayed quenching, with this catalyst system, produces unexpectedly large amounts of C3/C4 olefins, with little or no increase in coke make.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: February 14, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Yusuf G. Adewuyi, Peter M. Adornato, David L. Johnson, Gerald L. Teitman
  • FCC process with lift gas
    Patent number: 5389237
    Abstract: A process for fluidized catalytic cracking of heavy feed using a low H.sub.2 S content lift gas in the base of a riser reactor. The lift gas is a recycled, ethylene rich stream obtained by removing H.sub.2 S from a compressed vapor stream intermediate the FCC main column receiver and the gas plant associated with the FCC unit. The low H.sub.2 S lift gas does not increase SO.sub.x emissions from the regenerator as much as a recycled vapor from the FCC main column. As the lift gas is not purified in the gas plant it does not overload it.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: February 14, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Mohsen N. Harandi, Paul H. Schipper
  • Conversion of NO.sub.x in FCC bubbling bed regenerator
    Patent number: 5382352
    Abstract: Oxides of nitrogen (NO.sub.x) emissions from FCC regenerators in complete CO combustion mode are reduced by degrading regenerator performance to increase the coke on regenerated catalyst. High zeolite content cracking catalyst, regenerated to contain more coke, gives efficient conversion of feed and reduces NO.sub.x emissions from the regenerator. Operating with less catalyst, e.g., 30-60% of the normal amount of catalyst in the bubbling dense bed, can eliminate most NO.sub.x emissions while increasing slightly plant capacity and reducing catalyst deactivation.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: January 17, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Allen R. Hansen, David L. Johnson, Scott A. Stevenson, Paul H. Schipper, Mohsen N. Harandi
  • Active bed fluidized catalyst stripping
    Patent number: 5380426
    Abstract: A fluidized catalytic cracking process and apparatus with an active bed annular spent catalyst stripper is disclosed. An annular catalyst stripper disposed about a riser reactor is separated, by a baffle or fluid flow, into a secondary stripper nearer the catalyst regenerator and a primary stripper on the far side of the annular stripper from the regenerator. Catalyst flows through the primary stripper as a dense bed, to a transport means which lifts catalyst to the inlet of the secondary stripper. The "dead" region on side of annular strippers far from the regenerator is eliminated. Preferably catalyst is added to the primary stripper via cyclone diplegs, and a cyclone is used on the transport outlet.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: January 10, 1995
    Assignee: Mobil Oil Corporation
    Inventors: David L. Johnson, David H. Parsons, Gerald J. Teitman