Patents Represented by Attorney Ronald D. Hantman

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  • Acoustic monitoring of two phase feed nozzles
    Patent number: 5004152
    Abstract: Passive coustic method for monitoring and controlling flow state of two phase fluids through feed nozzles and thereby improving operating stability and high product value yields in major refinery processes or any other process where a finely atomized liquid stream exiting the nozzle is important.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: April 2, 1991
    Assignee: Exxon Research & Engineering Company
    Inventors: Charles L. Baker, George D. Cody, Craig A. Joseph, Uri Sela
  • Mazzite-type zeolite, ECR-15, and a process for preparing it
    Patent number: 5000932
    Abstract: The present invention relates to an aluminosilicate, designated as ECR-15, having the mazzite structure and containing dimethylammonium organic ions. It also relates to a process for preparation of the zeolite.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: March 19, 1991
    Assignee: Exxon Research and Engineering Company
    Inventor: David E. W. Vaughan
  • Crosslinked copolymers of aliphatic polyester diols and dianhydrides
    Patent number: 4997906
    Abstract: A crosslinked copolymer composition is derived from an aliphatic polyester, a dianhydride and a diisocyanate. The copolymer membrane has high thermal stability and good aromatic/saturate selectivity and permeability.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: March 5, 1991
    Assignee: Exxon Research & Engineering Company
    Inventors: Warren A. Thaler, W. S. W. Ho, Guido Sartori
  • Passive acoustics process to monitor fluidized bed level
    Patent number: 4993264
    Abstract: A method for the non-intrusive determination of the bed level in two phase fluid bed reactor using wall vibrations of the reactor.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: February 19, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: George D. Cody, Charles L. Baker, Eugene R. Elzinga, Jr.
  • Polyimide aliphatic polyester copolymers (C-2356)
    Patent number: 4990275
    Abstract: A new copolymer composition comprising the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high thermal stability for separation of an aromatic/saturate mixture. These new membranes have higher aromatic/saturate selectivity than polyurethanes.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: February 5, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: W. S. Winston Ho, Guido Sartori, Warren A. Thaler, David C. Dalrymple
  • Method for producing tomographic images using direct Fourier inversion
    Patent number: 4991093
    Abstract: The present invention is a method for examining at least a portion of an object using penetration radiation. The method includes the steps of transmitting radiation from an external source through the object in a plurality of coplanar rays, detecting the attenuated transmitted radiation after it has passed through the object, determining the projection data for said rays, and inverting said projection data to generate the distribution of the attenuation coefficient, wherein said inverting step includes the Direct Fourier Inversion Method such that the projection data is padded and the Fourier coefficients are filtered.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: February 5, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: Wayne Roberge, Brian Flannery
  • Polyester membranes for aromatics/saturates separation
    Patent number: 4976868
    Abstract: Polyester membranes show good selectivity for aromatics vs. saturates. Modified, e.g., crosslinked, polyesters and their blends can also be used.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: December 11, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Guido Sartori, W. S. Winston Ho
  • Passive acoustic power spectra to monitor and control processing
    Patent number: 4973386
    Abstract: A process for the detection and measurement of wall coke at a specific location in a fluid bed coker through the measurement of the vibrations of the external shell of the coker at the location.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: November 27, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Andrew J. Callegari, Eugene R. Elzinga, Jr., George D. Cody, Roger W. Cohen
  • Crystalline zeolite composition
    Patent number: 4973461
    Abstract: A synthetic crystalline zeolite is provided characterized by having a composition, in terms of mole ratios of oxides, in the range:0.9 to 1.1 M.sub.2/n O:Al.sub.2 O.sub.3 :2.5 to 5.1 SiO.sub.2 :xH.sub.2 Owherein M is at least one exchangeable cation, n is the valence of M, and x is 0 to 6, and characterized by having a specified x-ray powder diffraction pattern. The zeolite may be prepared by crystallization from a reaction mixture of KOH (and optionally a minor amount of NaOH), water, a source of silica, and a source of alumina preferably derived from kaolin or halloysite. Most preferably, the source of alumina is metakaolin and the source of silica is potassium silicate.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: November 27, 1990
    Assignee: Exxon Research & Engineering Company
    Inventor: David E. Vaughan
  • High silica faujasite aluminosilicate, ECR-4, and a process for making it
    Patent number: 4965059
    Abstract: An aluminosilicate characterized by having a faujasite structure, a silica to alumina mole ratio of at least six and unbalanced tetra alkylammonium ions within the large cages of the aluminosilicate. This composition may be prepared by crystallization from an aged reaction mixture of an oxide of sodium, tetra alkyl or hydroxy alkyl ammonium, salt, water, a source of silica, a source of alumina and sodium aluminosilicate nucleating seeds in specified relative amounts.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: October 23, 1990
    Assignee: Exxon Research & Engineering Company
    Inventor: David E. W. Vaughan
  • Absorbent composition containing a severely-hindered amine mixture with amine salts and/or aminoacid additives for the absorption of H.sub.2 S
    Patent number: 4961873
    Abstract: The present invention relates to a new alkaline absorbent solution that reduces the H.sub.2 S content in a treated gas to below 10 vppm. The absorbent solution contains two severely-hindered amines, such as bis(tertiarybutylaminoethoxy)-ethane (BTEE) and ethoxyethoxyethanol-tertiarybutylamine (EEETB), a severely hindered amine salt, and/or a severely hindered aminoacid. This invention also describes a process for the removal of H.sub.2 S from fluid mixtures using this absorbent solution to produce a very low level of H.sub.2 S in the treated fluid. The process is also suitable for the selective removal of H.sub.2 S from fluid mixtures comprising H.sub.2 S and CO.sub.2.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: October 9, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: W. S. Winston Ho, Guido Sartori, Eugene L. Stogryn
  • Zeolite ECR-10
    Patent number: 4960578
    Abstract: The present invention relates to a gallo-aluminosilicate zeolite designated as ECR-10 which contains cesium. It also relates to a process for preparation of the zeolite. It may be employed in absorbent or separation applications, particularly in separation of small molecules.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: October 2, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: David E. W. Vaughan, Karl G. Strohmaier
  • Molybdenum phosphate compositions
    Patent number: 4956483
    Abstract: A class of new oxide structures containing octahedral molybdenum and tetrahedral phosphorous has been generated using hydothermal techniques. These materials are produced by the reaction of a molybdenum oxide source with phosphate and any one, or combination of organic cation/alkali-metal cation/organic amine as a templating/mineralizing agent. A reducing agent is necessary to convert the Mo(VI) to a lower valent form and can be either added to the reaction mixture or is provided in the form of one the reactants.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: September 11, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Edward W. Corcoran, Jr., Robert C. Haushalter, Wen-Yih F. Lai
  • Crosslinked copolymers of aliphatic polyester diols and dianhydrides
    Patent number: 4946594
    Abstract: A crosslinked copolymer composition is derived from an aliphatic polyester, a dianhydride and a diicoyanate. The copolymer membrane has high thermal stability and good aromatic/saturate selectivity and permeability.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: August 7, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Warren A. Thaler, W. S. Winston Ho, Guido Sartori
  • Polyimide/aliphatic polyester copolymers
    Patent number: 4944880
    Abstract: A new copolymer composition comprising the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high thermal stability for separation of an aromatic/saturate mixture. These new membranes have higher aromatic/saturate selectivity than polyurethanes.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: July 31, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: W. S. Winston Ho, Guido Sartori, Warren A. Thaler, David C. Dalrymple
  • Tin substitution into zeolite frameworks
    Patent number: 4933161
    Abstract: This invention relates to novel zeolitic compositions having tin substituted into the framework positions and a method for their preparation. The process of preparation more specifically involves hydrothermally treating aluminosilicate silica zeolite in the presence of tin compounds.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: June 12, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: David E. W. Vaughan, Stephen B. Rice
  • Process for preparing a high silica zeolite having the faujasite topology, ECR-32
    Patent number: 4931267
    Abstract: A faujasite polymorph having a silica to alumina ratio greater than 6, and containing tetrapropyl ammonium and/or tetrabutyl ammonium trapped within the supercages of said structure.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: June 5, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: David E. W. Vaughan, Karl G. Strohmaier
  • Primary hindered aminoacids for promoted acid gas scrubbing process
    Patent number: 4919904
    Abstract: Disclosed are primary sterically hindered aminoacids for use as promoters for alkali metal salts in acid gas scrubbing. The primary sterically hindered aminoacid is selected from 1-amino-cyclopentane carboxylic acid and those represented by the formula: ##STR1## where R.sub.1 and R.sub.2 are independently selected from CH.sub.3, C.sub.2 H.sub.5, and C.sub.3 H.sub.7 ; R.sub.3 and R.sub.4 are independently selected from hydrogen and CH.sub.3 ; and n is 0, 2, or 3.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: April 24, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Larry J. Shulik, Guido Sartori, W. S. Winston Ho, Warren Thaler, George E. Milliman
  • Diffusion of elements into steel by catalyzed oxide reduction
    Patent number: 4904500
    Abstract: A process for diffusing silicon into iron or iron alloy by heating the iron or iron alloy with silica and a suitable reducing agent in the presence of a catalyst.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: February 27, 1990
    Assignee: Exxon Research and Engineering Company
    Inventor: Richard C. Krutenat
  • Addition of severely-hindered aminoacids to severely-hindered amines for the absorption of H.sub.2 S
    Patent number: 4895670
    Abstract: A new alkaline absorbent solution containing a severely-hindered amine and a severely-hindered aminoacid is provided. A process for the removal of H.sub.2 S from fluid mixtures using this absorbent solution to produce a very low level of H.sub.2 S in the treated fluid is also provided. The process is also suitable for the selective removal of H.sub.2 S from fluid mixtures comprising H.sub.2 S and CO.sub.2. Use of the above absorbent solution leads to higher selectivity for H.sub.2 S than observed when the severely-hindered amine is used alone without the severely-hindered aminoacid.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: January 23, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Guido Sartori, W. S. Winston Ho