Patents Represented by Attorney Richard A. Morgan

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  • Recovering polyoxyalkylene glycols from wastewater
    Patent number: 5425884
    Abstract: A method has been discovered for recovering polyoxyalkylene glycols from wastewater. A skimming surface is heated to a temperature above the cloud point. The heated surface is contacted with the wastewater, causing the polymer to deposit. Deposited polymer skimmed from the surface is recovered. Heating, or other processing of the bulk wastewater is avoided.
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: June 20, 1995
    Assignee: Texaco Inc.
    Inventor: Frank K. Botz
  • Railroad wheel flange lubricating method
    Patent number: 5415896
    Abstract: Railroad wheel flange lubricating is carried out with a lubricating composition which is particularly useful in a locomotive-mounted applicator. The water base lubricant comprises a compatible blend of two polyoxyalkylene glycols, one a synthetic lubricant and the other a synthetic thickener. The lubricating composition is persistent and environmentally innocuous.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: May 16, 1995
    Assignee: Texaco Inc.
    Inventors: Mark A. Mulvihill, Arnold C. Witte, Frank K. Botz
  • Method of recovering MTBE from wastewater
    Patent number: 5413717
    Abstract: Dialkyl ethers having 5 to 7 carbon atoms; e.g. MTBE, and alcohols having 1 to 4 carbon atoms are extracted from wastewater with contaminant-free gasoline. Wastewater saturated with contaminants is reduced to 200 ppm contaminants in the absence of stripping. An octane enhanced gasoline is recovered. Additional ether may be added to the recovered gasoline to increase octane. The method is particularly effective in wastewater/gasoline system containing emulsifiers such as surfactants, gasoline detergents and colloidal particles.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: May 9, 1995
    Assignee: Texaco Inc.
    Inventors: George H. Webster, Jr., Donald E. Carrillo
  • Isobutane oxidation
    Patent number: 5399777
    Abstract: In the non-catalytic liquid phase oxidation of isobutane, it has been found that the reaction is initiated with 0.05 wt % to 0.08 wt % tertiary butyl hydroperoxide.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: March 21, 1995
    Assignee: Texaco Chemical Inc.
    Inventor: Mark A. Mueller
  • Isobutane oxidation process
    Patent number: 5395980
    Abstract: In the non-catalytic liquid phase oxidation of isobutane, it has been found that the reaction is initiated with 0.05 wt % to 0.08 wt % ditertiary butyl peroxide.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: March 7, 1995
    Assignee: Texaco Chemical Inc.
    Inventors: Mark A. Mueller, John R. Sanderson
  • Control method for direct-coupled FCC riser cyclone
    Patent number: 5389239
    Abstract: In a direct-coupled cyclone system, the riser cyclone is positioned external to a containment vessel. The riser cyclone separator discharges separated catalyst to a catalyst stripper internal to the containment vessel. Means is provided for withdrawing stripping gas from the catalyst stripper and passing it under pressure control to the riser cyclone separator. The riser cyclone separator is inherently pressure stable relative to the catalyst stripper. The invention is particularly useful for retrofitting a direct-coupled cyclone separator to a preexisting containment vessel with limited free volume.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: February 14, 1995
    Assignee: Texaco Inc.
    Inventor: Leonce F. Castagnos, Jr.
  • Ebullated bed process with recycle eductor
    Patent number: 5389238
    Abstract: In an ebullated bed process the feedstock conduit is provided with at least 50 psi (4.4 atm) head in excess of a liquid-vapor separation pressure. The excess head is used in combination with an eductor to recycle a reactor effluent liquid. The expanded catalyst bed is thereby maintained at 110 vol % to vol % of a settled catalyst volume. A separate pump to expand (ebullate) the catalyst bed is not required.
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: February 14, 1995
    Assignee: Texaco Inc.
    Inventors: Edward K. Liu, John C. Strickland, Ting Y. Chan
  • Methyl tertiary butyl ether process
    Patent number: 5387721
    Abstract: Methyl tertiary butyl ether (MTBE) is formed by reaction of methanol with tertiary butyl ether in two catalyst beds. A feedstock mixture comprising methanol and tertiary butyl alcohol in a molar ratio of 2 to 3 moles of methanol per mole of tertiary butyl alcohol is reacted in a first etherification reaction zone at a liquid hourly space velocity of 1 to 10 volumes of feedstock mixture per volume of catalyst per hour. A first reaction product mixture is fractionated to remove unreacted methanol, isobutylene and MTBE overhead. This isobutylene is passed to a second etherification reaction zone at a liquid hourly space velocity of 1 to 10. A second reaction product mixture is fractionated to recover additional MTBE.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: February 7, 1995
    Assignee: Texaco Inc.
    Inventors: Charles J. Kruse, Kyle L. Preston, Brian L. Benac
  • Methyl tertiary butyl ether process
    Patent number: 5386065
    Abstract: Methyl tertiary butyl ether (MTBE) is formed by reaction of methanol with tertiary butyl ether in two catalyst beds. A feedstock mixture comprising methanol and tertiary butyl alcohol in a molar ratio of 2 to 3 moles of methanol per mole of tertiary butyl alcohol is reacted in a first etherification reaction zone at a liquid hourly space velocity of 1 to 10 volumes of feedstock mixture per volume of catalyst per hour. A first reaction product mixture is fractionated to remove MTBE as an overhead fraction. The bottoms fraction comprising unreacted methanol and tertiary butyl alcohol is passed to a second etherification reaction zone at a liquid hourly space velocity of 0.5 to 4. A second reaction product mixture is fractionated to recover additional MTBE.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: January 31, 1995
    Assignee: Texaco Inc.
    Inventors: Charles J. Kruse, Kyle L. Preston, Brian L. Benac
  • Direct-coupled FCC riser cyclone and plenum
    Patent number: 5376339
    Abstract: A riser cyclone separator is positioned external to a containment vessel. The riser cyclone separator discharges separated catalyst to a catalyst stripper and separated vapor to a plenum, both positioned internal to the containment vessel. Means is provided for withdrawing stripping gas from the catalyst stripper and passing it via the riser cyclone separator to the plenum. The riser cyclone separator is inherently pressure stable relative to the containment vessel. The invention is particularly useful for retrofitting a direct-connected riser cyclone separator to a preexisting containment vessel with space limitations.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: December 27, 1994
    Assignee: Texaco Inc.
    Inventors: Leonce F. Castagnos, Jr., Harold C. Kaufman
  • Method for stripping contaminants from wastewater
    Patent number: 5368754
    Abstract: A method has been discovered for stripping aromatic hydrocarbon contaminants from wastewater and retaining the aromatic hydrocarbons on activated carbon. The wastewater is contacted countercurrently with stripping gas. The stripping gas is passed over a bed of activated carbon to regenerate the stripping gas. The entire volume of stripping gas is recycled to the stripping vessel. There is no purge of stripping gas or aromatic hydrocarbons to the atmosphere. The removed aromatic hydrocarbons are retained by the activated carbon and periodically recovered. An activated carbon particularly adapted for retaining and recovering aromatic hydrocarbons has been found.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: November 29, 1994
    Assignee: Texaco Inc.
    Inventors: Byron Von Klock, Irl L. Zuber
  • Fluid catalytic cracking process yielding hydrogen
    Patent number: 5362380
    Abstract: In a fluid catalytic cracking (FCC) process coked catalyst is partially regenerated by contacting with high temperature steam in the absence of oxygen. About 10 to 30% of the coke is converted to a steam reformed gas comprising hydrogen, methane and carbon dioxide. The off-gas may be subjected to cryogenic separation to yield a hydrogen-rich gas.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: November 8, 1994
    Assignee: Texaco Inc.
    Inventors: Hsu-Hui Hsing, James Mudra, IV
  • Ebullated bed process with recycle eductor
    Patent number: 5360535
    Abstract: In an ebullated bed process reactor effluent is subjected to high pressure followed by intermediate flash separation. An ebullation liquid is formed by educting high pressure flash separation liquid into an intermediate flash separation liquid. The ebullation liquid is recycled to the reactor to expand the catalyst bed to 110 vol % to 200 vol % of a settled catalyst bed volume. As a result of recycle pressure balance is advantageously maintained. Carry over catalyst and catalyst fines are recycled to the reactor and kept out of downstream equipment.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: November 1, 1994
    Assignee: Texaco Inc.
    Inventors: Edward K. Liu, Doyun Kim, Ting Y. Chan
  • Mild hydrocracking process employing catalysts containing dealuminated y-zeolites
    Patent number: 5342507
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of heavy hydrocarbons boiling above 1000.degree. F. into products boiling below 1000.degree. F. as well as increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 5.0 wt. % of an oxide of phosphorus supported on a porous support comprising precipitated alumina or silica-containing alumina and dealuminated Y-zeolite.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: August 30, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Bobby R. Martin, David E. Sherwood, Jr.
  • Electric discharge machine process and fluid
    Patent number: 5332529
    Abstract: An electric discharge machine fluid has been discovered. The fluid comprises a naphthene oil and 0.15 to 0.50 wt % 1,6-hexamethylene bis(3,5-ditertiarybutyl-4-hydroxycinnamate). The fluid was found to increase the breakdown voltage of the fluid and to stabilize oxidative deterioration.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: July 26, 1994
    Assignee: Texaco Inc.
    Inventors: Theodore C. Mead, Douglas H. Culpon, Jr.
  • Mild hydrocracking of heavy hydrocarbon feedstocks employing lithia promoted catalysts
    Patent number: 5322616
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and about 0 to about 5.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 0.1 to about 10.0 wt. % of lithium oxide.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: June 21, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Joseph A. Durkin, David E. Sherwood, Jr.
  • Mild hydrocracking of heavy hydrocarbon feedstocks employing silica-alumina catalysts
    Patent number: 5320743
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of the 1000.degree. F.+ hydrocarbon fraction to the 1000.degree. F.- fraction and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 2.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 3.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 4.0 to about 30 wt. % of silica.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: June 14, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell II, Bobby R. Martin, Randall H. Petty
  • Heavy naphtha conversion process
    Patent number: 5318689
    Abstract: A straight run naphtha is fractionated to yield on intermediate naphtha and the heaviest 10 vol % as heavy naphtha. The intermediate naphtha is catalytically reformed to yield reformed naphtha having a 90 vol % temperature (T90) of 310.degree. F. (155.degree. C.). The heavy naphtha is subjected to fluid catalytic cracking (FCC) to yield liquid fuel and lighter, including C.sub.4 olefins and a cracked naphtha having a research octane number suitable for gasoline blending.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: June 7, 1994
    Assignee: Texaco Inc.
    Inventors: Hsu-Hui Hsing, Roy E. Pratt
  • Used lubricating oil reclaiming
    Patent number: 5306419
    Abstract: A used lubricating oil comprising lube oil additives, including zinc dithiophosphate is subjected to reclaiming. Zinc dithiophosphate is thermally decomposed at a temperature of 400.degree. F. (204.degree. C.) to 1000.degree. F. (538.degree. C.) for a residence time of 10 to 120 minutes. The resulting oil is subjected to vacuum distillation. A zinc-free (i.e. ash free by ASTM D-482) distillate oil is useful as marine diesel fuel. About 5 to 25 vol % is recovered as a metal containing bottoms product, useful as asphalt extender. The process is carried out in the absence of chemical demetallizing.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: April 26, 1994
    Assignee: Texaco Inc.
    Inventors: Charles W. Harrison, Arthur G. Gorneau, Robert M. Steinberg, Bruce R. Bond
  • Ebullated bed hydroprocessing of petroleum distillates
    Patent number: 5298151
    Abstract: In ebullated bed hydroprocessing of a distillate hydrocarbon feedstock, it has been found that high pressure and low pressure heat exchange can be separated. Both the high pressure heat exchange and the fired heater fuel consumption are reduced. A control system provides for a constant distillate feedstock temperature in cooperation with heat integration.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: March 29, 1994
    Assignee: Texaco Inc.
    Inventors: Robert M. Steinberg, Jacquelyn G. Niccum, John C. Strickland