Patents by Inventor Willard H. Sawyer

Willard H. Sawyer 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).

  • Patent number: 5037532
    Abstract: A slurry hydrotreating process is described in which a hydrotreating catalyst of small particle size is contacted with a heavy fossil fuel. High catalyst activity is maintained by circulating the catalyst between a hydrotreating zone and a reactivating zone where the catalyst is hydrogen stripped.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: August 6, 1991
    Assignee: Exxon Research & Engineering Company
    Inventors: William E. Winter, Jr., Willard H. Sawyer
  • Patent number: 4959337
    Abstract: A wax isomerization catalyst is described which comprises a Group VIII hydrogenation metal component on fluorided alumina or material containing alumina which catalyst possesses a surface nitrogen content N/Al ratio of about 0.01 or less determined by X-ray photoelectron spectroscopy, a bulk fluorine content of between about 2 to 10 wt %, a surface fluorine content defined as the amount of fluorine in a layer extending from the outer surface to a depth of about 1/100 of an inch of less than about 3 wt % provided that the surface fluoride concentration is less than the bulk fluoride concentration and an aluminum fluoride hydroxide hydrate peak height of 60 or less determined as the relative amount of hydrate represented by a peak in the X-ray diffraction pattern at 2.theta.=5.66 .ANG. when a hydrate level of 100 corresponds to the XRD peak height exhibited by a standard material.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: September 25, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Ian A. Cody, Hamner, deceased Glen P., Willard H. Sawyer, Willard H. Sawyer, Davis S. Mark
  • Patent number: 4952306
    Abstract: A novel slurry hydrotreating process is described which employs a hydrotreating catalyst of small particle size having a quantity of catalyst sites in excess of those required for reaction and/or adsorption of nitrogen compounds in the petroleum or synfuel feed being treated. The excess catalyst sites can therefore in effect be contacted with a low nitrogen or essentially zero nitrogen feed, allowing rapid hydrogenation of aromatics at low temperatures where equilibrium is favored. In a further aspect of the invention, the catalyst which contains adsorbed nitrogen is activated by high temperature denitrogenation.
    Type: Grant
    Filed: September 22, 1989
    Date of Patent: August 28, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Willard H. Sawyer, Roby Bearden, Jr., Russell R. Chianelli, William E. Winter, Jr.
  • Patent number: 4923841
    Abstract: A fluorided platinum-on-alumina catalyst for wax isomerization wherein the platinum is substantially uniformly distributed throughout the catalyst in the form of relatively small crystallites, of the total fluoride present in the catalyst very little is located on the outer surface of the catalyst and a significant concentration of the fluoride within the catalyst is present as aluminum fluoride hydroxide hydrate. The catalyst is prepared by contacting a platinum-on-alumina with a solution having a relatively high concentration of fluoride and drying the fluorided platinum-on-alumina catalyst at temperatures not in excess of 650.degree. F.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: May 8, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Glen P. Hamner, deceased, Willard H. Sawyer
  • Patent number: 4919786
    Abstract: A process for selectively producing middle distillate fuel products from paraffin waxes such as slack wax and Fischer-Tropsch wax by hydroisomerizing the wax to convert 60-95 weight percent per pass of the 700.degree. F..sup.+ fraction contained in said wax. The catalyst employed is a fluorided Group VIII metal-on-alumina catalyst where the fluoride within the catalyst is present predominately as aluminum fluoride hydroxide hydrate. The preferred Group VIII metal is platinum.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: April 24, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Glen P. Hamner, deceased, Willard H. Sawyer, Heather A. Boucher
  • Patent number: 4900707
    Abstract: An improved wax isomerization catalyst is described which is a hydrogenation metal on halogenated refractory metal oxide support catalyst characterized in that the catalyst is prepared by depositing the hydrogenation metal on the refractory metal oxide support followed by fluoriding using a low pH fluorine source such as aqueous HF. Thereafter the catalyst is crushed to expose inner surfaces, the crushed catalyst being sieved to remove fines, the catalyst charge having an average particle diameter of 1/32 inch and smaller across the longest continuous cross sectional dimension, preferably between 1/64 to 1/32". Alternatively, the catalyst is made by depositing a hydrogenation metal on a refractory metal support, crushing the material to a particle size of 1/32 inch and smaller across the longest continuous cross-sectional dimension and fluoriding said material using acidic fluorine source such as HF. Following sizing the sized catalyst is activated by heating in a hydrogen atmosphere.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: February 13, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Ian A. Cody, Glen P. Hamner, deceased, Willard H. Sawyer, James J. Schorfheide
  • Patent number: 4828676
    Abstract: A process for the production of high octane gasoline, or high octane gasoline blending components from a sulfur and nitrogen-containing feed composition of wide boiling range rich in fused multi-ring aromatic hydrocarbons containing two, and three or more rings in the molecule. The feed is first hydrogenated to desulfurize, denitrogenate and saturate one ring of the two-ring molecular species, but insufficient to saturate the second ring of said molecular species. The product, as a feed, is then hydrocracked to crack fused multi-ring aromatic hydrocarbons containing three or more rings to the molecule, and to produce lower molecular weight, lower boiling components. The product of the hydrocracker is then split into blends which include (i) a blend rich in fused two-ring aromatic hydrocarbons and (ii) a blend rich in fused multi-ring aromatic hydrocarbons containing three or more rings to the molecule.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: May 9, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: Willard H. Sawyer, Carl W. Hudson, Robert H. Waghorne
  • Patent number: 4828675
    Abstract: A process for the production of high octane gasoline, or high octane gasoline blending components, from a sulfur-containing feed rich in fused two-ring aromatic hydrocarbons, inclusive of naphthalenes. The feed is hydrogenated in a first reaction zone to desulfurize the feed and saturate one ring of the fused two-ring aromatic hydrocarbons, but insufficient to saturate the second ring of said molecular species, to form tetralins. The product, as a feed, is reacted in a second reaction zone over a catalyst comprised of elemental iron and one or more alkali or alkaline-earth metals components to selectively hydrogenate and crack the previously hydrogenated fused two-ring aromatic hydrocarbons to produce lower molecular weight higher octane components suitable per se as gasoline, or gasoline blending components.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: May 9, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: Willard H. Sawyer, Carl W. Hudson
  • Patent number: 4542121
    Abstract: A process for the preparation of novel highly active, highly selective hydrotreating catalysts. These catalysts are prepared, in bulk or in supported form, from a catalyst precursor characterized by the formula B.sub.x [Mo.sub.3 S.sub.z ] where B is an ammonium ion, polyammonium ion, tertiary or quaternary phosphonium ion, or a hydrocarbyl substituted ammonium ion, hydrocarbyl substituted polyammonium ion, or hydrocarbyl substituted tertiary or quaternary phosphonium ion, x is 1 where B is a divalent cationic moiety, or 2 where B is a monovalent cationic moiety, [Mo.sub.3 S.sub.z ] is a divalent anionic moiety wherein z is an integer greater than 15. The catalyst precursor is dispersed in an ammonium sulfide or dilute ammonium polysulfide solution and heated to remove sulfur from said catalyst precursor to provide a z value of 15 or less. Carbon is also removed from the catalyst precursor and, where B of the B.sub.x [Mo.sub.3 S.sub.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: September 17, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Howard L. Mitchell, III, Willard H. Sawyer
  • Patent number: 4540481
    Abstract: A process for the preparation of novel highly active, highly selective hydrotreating catalysts. These catalysts are prepared, in bulk or in supported form, by contacting together and decomposing, in the presence of hydrogen, hydrocarbon, and sulfur, a catalyst precursor characterized by the formula B.sub.x [Mo.sub.3 S.sub.z ] where B is an ammonium ion, polyammonium ion, tertiary or quaternary phosphonium ion, or a hydrocarbyl substituted ammonium ion, hydrocarbyl substituted polyammonium ion, or hydrocarbyl substituted tertiary or quaternary phosphonium ion, x is 1 where B is a divalent cationic moiety, or 2 where B is a monovalent cationic moiety, [Mo.sub.3 S.sub.z ] is a divalent anionic moiety wherein z is an integer ranging from about 10 to about 46. A preferred precursor catalyst species is Mo.sub.3 (S.sub.2).sub.6 S.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: September 10, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Willard H. Sawyer, Howard L. Mitchell, III
  • Patent number: 4430442
    Abstract: A process for the preparation of novel highly active, highly selective hydrotreating catalysts. These catalysts are prepared, in bulk or in supported form, by contacting together and decomposing, in the presence of hydrogen, hydrocarbon, and sulfur, a catalyst precursor characterized by the formula B.sub.x [Mo.sub.3 S.sub.z ] where B is an ammonium ion, polyammonium ion, tertiary or quaternary phosphonium ion, or a hydrocarbyl substituted ammonium ion, hydrocarbyl substituted polyammonium ion, or hydrocarbyl substituted tertiary or quaternary phosphonium ion, x is 1 where B is a divalent cationic moiety, or 2 where B is a monovalent cationic moiety, [Mo.sub.3 S.sub.z ] is a divalent anionic moiety wherein z is an integer ranging from about 10 to about 46. A preferred precursor catalyst species is Mo.sub.3 (S.sub.2).sub.6 S.
    Type: Grant
    Filed: July 20, 1982
    Date of Patent: February 7, 1984
    Assignee: Exxon Research and Engineering Co.
    Inventors: Willard H. Sawyer, Howard L. Mitchell, III
  • Patent number: 4344867
    Abstract: A catalyst comprising Group VIB and Group VIII metal components and a support prepared by treating alpha alumina monohydrate with an acid solution comprising a hydrolyzable metal salt, such as zirconium nitrate.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: August 17, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventors: Neville L. Cull, Willard H. Sawyer
  • Patent number: 4326947
    Abstract: A catalyst is provided which comprises an ultrastable Y-type crystalline aluminosilicate zeolite, an alumina-aluminum fluorophosphate and a hydrogenation component. Hydrocarbon hydroprocessing processes utilizing the catalyst are also provided.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: April 27, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventors: Willard H. Sawyer, Neville L. Cull
  • Patent number: 4309278
    Abstract: A catalyst is provided which comprises a hydrogenation component and a support comprising agglomerates of alumina having initially not more than 0.20 cubic centimeters per gram of its pore volume in pores greater than about 400 Angstroms in diameter and a minor amount of silica. A process for the hydroconversion of hydrocarbonaceous oils utilizing the catalyst is also provided.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: January 5, 1982
    Assignee: Exxon Research & Engineering Co.
    Inventor: Willard H. Sawyer
  • Patent number: 4277373
    Abstract: A catalyst is provided which comprises an ultrastable Y-type crystalline aluminosilicate zeolite, an alumina-aluminum fluorophosphate and a hydrogenation component. Hydrocarbon hydroprocessing processes utilizing the catalyst are also provided.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: July 7, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Willard H. Sawyer, Neville L. Cull
  • Patent number: 4276201
    Abstract: A catalyst is provided which comprises a hydrogenation component and a support comprising agglomerates of alumina having initially not more than 0.20 cubic centimeters per gram of its pore volume in pores greater than about 400 Angstroms in diameter and a minor amount of silica. A process for the hydroconversion of hydrocarbonaceous oils utilizing the catalyst is also provided.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: June 30, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventor: Willard H. Sawyer
  • Patent number: 4255288
    Abstract: A catalyst comprising an ultrastable Y-type crystalline aluminosilicate zeolite, alumina, zirconia and a hydrogenation component is prepared by specified methods. The catalysts are suitable as hydrocarbon hydroprocessing catalysts.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: March 10, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Neville L. Cull, Willard H. Sawyer
  • Patent number: 4081406
    Abstract: An improved process for the production of catalysts comprised of a metal hydrogenation component, or components, composited with high pore volume alumina, with pores of narrow pore size distribution, wherein macropore volume is drastically reduced by improved extrusion techniques. An alumina hydrogel paste is extruded through a die to form spaghetti-like extrudate shapes by application of sufficient torque, suitably from about 25 to about 55 inch-pounds, preferably from about 40 to about 50 inch-pounds, to eliminate much of the macropore volume, i.e., pores greater than 400A, which greatly improves the activity maintenance of the catalyst. The extrudates can, if desired, be shaped into other forms, suitably spheres. The improved process also embodies a technique for increasing the intrinsic activity of these and other catalysts by special impregnation techniques which provides better dispersion of the metal hydrogenation component, or components, throughout the catalyst.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: March 28, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventor: Willard H. Sawyer
  • Patent number: 4081405
    Abstract: An improved process for the production of catalysts comprised of a metal hydrogenation component, or components, composited with high pore volume alumina, with pores of narrow pore size distribution, wherein macropore volume is drastically reduced by improved extrusion techniques. An alumina hydrogel paste is extruded through a die to form spaghetti-like extrudate shapes by application of sufficient torque, suitably from about 25 to about 55 inch-pounds, preferably from about 40 to about 50 inch-pounds, to eliminate much of the macropore volume, i.e., pores greater than 400A, which greatly improves the activity maintenance of the catalyst. The extrudates can, if desired, be shaped into other forms, suitably spheres. The process of the present invention embodies a technique for increasing the intrinsic activity of these and other catalysts by special impregnation and drying techniques which provides better dispersion of the metal hydrogenation component, or components, throughout the catalyst.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: March 28, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventor: Willard H. Sawyer
  • Patent number: 4016107
    Abstract: A process for the formation of a catalyst of predetermined pore size distribution and pore volume from an alumina hydrogel formed and obtained by precipitation from a solution containing a hydrous form of alumina in 1-5 wt. % concentration and an anion that is soluble in an alkaline solution and forms an aluminum salt, at pH 8-12, and temperature ranging about 15.degree. F.-120.degree. F., and then extended by contact with a solution of a water-soluble polymer containing 2 to about 24 monomer units from the group consisting of (a) polyethylene glycols, (b) polypropylene glycols, and (c) polyethylene amines sufficient to absorb the polymer and displace water from the pores until the weight ratio of polymer:alumina ranges about 0.5:1 to about 4:1. A metal hydrogenation component, or components, suitably a Group VI-B or Group VIII metal, or both, can be added during the polymer extending step, if desired, by adding a soluble compound, or salt of the desired metal, or metals, to the polymer containing solution.
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: April 5, 1977
    Assignee: Exxon Research and Engineering Company
    Inventors: Willard H. Sawyer, Harry E. Robson