Patents Represented by Attorney Raymond H. Nelson

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  • Recovery of titanium metal values
    Patent number: 4197276
    Abstract: Titanium metal values may be recovered from iron and titanium bearing sources such as an ilmenite ore by subjecting the source to a reductive roast after having crushed the source to a desired particle size. The reduced source is then leached by treatment with a halogen-containing compound to form soluble titanium halides and iron halides. Thereafter, the soluble titanium halide is precipitated as titanium dioxide by treatment with an iron oxide such as ferric oxide. The desired titanium dioxide or rutile may be recovered without an appreciable loss by effecting the leach step of the process in such a manner so that the solution potential is not greater than about +150 millivolts.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: April 8, 1980
    Assignee: UOP Inc.
    Inventors: William K. Tolley, John C. Stauter
  • Preparation of support matrices for immobilized enzymes
    Patent number: 4193910
    Abstract: Support matrices for immobilized enzymes which comprise a combined organic-inorganic support may be prepared by treating a solid, porous, inorganic, water-insoluble support such as an inorganic porous metal oxide with a styrene monomer, polymerizing the styrene on the solid support at polymerizing conditions, nitrating the resultant polystyrene-solid support composite and thereafter reducing the nitrated polystyrene-solid support composite to form an aminopolystyrene-solid support matrix.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: March 18, 1980
    Assignee: UOP Inc.
    Inventors: Ronald P. Rohrbach, Joseph Levy
  • Hydrometallurgical recovery of cobalt and nickel
    Patent number: 4187281
    Abstract: Metal values may be recovered from metal bearing sources in a hydrometallurgical process in which a metal bearing source such as an ore and the like is reduced with a reductive roast only or with the presence of at least one additive at temperatures ranging from about 500.degree. to about 900.degree. C. Thereafter the reduced source is subjected to a leach in the presence of a basic leaching agent to extract the desired metals from the source. In the present invention, the basic leaching agent which is employed comprises an ammoniacal ammonium chloride solution.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: February 5, 1980
    Assignee: UOP Inc.
    Inventor: John C. Stauter
  • Filter material for removal of ozone from the atmosphere
    Patent number: 4184983
    Abstract: Ozone, which may be an irritating factor present in the atmosphere, may be removed therefrom by utilizing, as a filter material, in masks a material comprising at least one metal or metal oxide selected from Group VIII of the Periodic Table, a carbonaceous pyropolymer or combinations thereof composited on a solid support such as an alumina.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: January 22, 1980
    Assignee: UOP Inc.
    Inventors: Patricia J. Putz, Marie A. Lishka, Edwin J. Latos
  • Preparation of amines
    Patent number: 4179469
    Abstract: Amines, which may be utilized in various chemical processes, may be prepared in a combination process wherein the product mixture resulting from the dehydrogenation of a paraffin feed stock may be reacted with a nitrogen-containing compound, carbon monoxide and hydrogen, without separating the olefins in the product mixture, in the presence of certain catalytic compositions of matter to prepare the aforesaid amines.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: December 18, 1979
    Assignee: UOP Inc.
    Inventor: Tamotsu Imai
  • Recovery of iron and titanium metal values
    Patent number: 4178176
    Abstract: Iron metal values and titanium metal values may be recovered from iron and titanium bearing sources such as ilmenite by subjecting the source to a reductive roast followed by leaching of the reduced source with a halogen-containing compound. Thereafter, the iron halide is crystallized and separated from the soluble titanium halides. One portion of the iron halides is subjected to a reducing step to form metallic iron while a second portion is oxidized, the iron oxides being used to precipitate the titanium as titanium dioxide. The titanium dioxide may then be separated and recovered while the liquid portion is recycled to the leaching zone.
    Type: Grant
    Filed: July 19, 1978
    Date of Patent: December 11, 1979
    Assignee: UOP Inc.
    Inventor: William K. Tolley
  • Recovery of iron and titanium metal values
    Patent number: 4175952
    Abstract: Iron metal values and titanium metal values may be recovered from iron and titanium bearing sources such as an ilmenite ore by subjecting the source to a reductive roast after crushing the source to a desired particle size. The reduced source is then leached by treatment with a halogen-containing compound to form soluble titanium halides and iron halides. Thereafter the soluble titanium halide is precipitated by treatment with iron oxides such as ferric oxide and after separation from the soluble iron halides is recovered as titanium dioxide. The soluble iron halides are then crystallized by reducing the temperature of the solution and one portion of the crystals are subjected to a reduction step to form metallic iron. The other portion of the iron halide crystals is oxidized to form ferric oxide which is used to precipitate the titanium compound.
    Type: Grant
    Filed: July 19, 1978
    Date of Patent: November 27, 1979
    Assignee: UOP Inc.
    Inventor: William K. Tolley
  • Recovery of titanium metal values
    Patent number: 4175110
    Abstract: Titanium metal values are recovered from a titanium bearing source such as an ilmenite ore by subjecting the source to a reductive roast and leaching the reduced source with a halogen-containing compound. Following this the soluble metal halides are separated from gangue and the pregnant leach liquor if treated with an iron oxide such as ferric oxide to precipitate titanium dioxide. The nucleation of the titanium dioxide may be improved by using a large excess of ferric oxide in the precipitation step. The improvement will thus result in an increased yield of the desired titanium dioxide.
    Type: Grant
    Filed: August 22, 1978
    Date of Patent: November 20, 1979
    Assignee: UOP Inc.
    Inventor: William K. Tolley
  • Recovery of titanium metal values
    Patent number: 4174963
    Abstract: Titanium metal values may be recovered from titanium and iron bearing sources such as an ilmenite ore by subjecting the source to an oxidation treatment and a reductive roast after having crushed the source to a desired particle size. The reduced source is then leached by treatment with a halogen-containing compound to form soluble titanium halides and iron halides. Thereafter the soluble titanium halide is precipitated as titanium dioxide by treatment with an iron oxide such as ferric oxide and recovered. The amount of titanium dioxide which is recovered is determined by the amount of reductant utilized in the reductive roast.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: November 20, 1979
    Assignee: UOP Inc.
    Inventor: William K. Tolley
  • Polymeric materials containing semiconducting refractory oxides
    Patent number: 4175152
    Abstract: Novel compositions of matter comprise polymeric materials containing, as a filler therefor, a semiconducting pyropolymeric inorganic refractory oxide material, said compositions being useful in situations which require items such as electrically conductive sheets which possess a given electrical resistance.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: November 20, 1979
    Assignee: UOP Inc.
    Inventors: Robert D. Carnahan, William C. Holt, Jr., Karl J. Youtsey
  • Separation of dissimilar amines
    Patent number: 4174351
    Abstract: Amines which are dissimilar in nature by virtue of possessing different substituents, different structures or position isomers may be selectively separated by treatment with a reactive carbonyl compound and an acid. The separation may be effected at reaction conditions which include a temperature in the range of from about ambient to about 150.degree. C. and a pressure in the range of from about atmospheric to about 100 atmospheres. An example of this separation is the treatment of a mixture of m-toluidine and p-toluidine with benzaldehyde and trifluoroacetic acid. The m-toluidine will form an imine while the p-toluidine will form an acid salt.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: November 13, 1979
    Assignee: UOP Inc.
    Inventor: James P. Shoffner
  • Separation of rutile from ilmenite
    Patent number: 4174274
    Abstract: Rutile may be separated from ilmenite or ilmenite ores by agitating a mixture of ilmenite and rutile in particle form in an aqueous solution containing a collection agent to which hydrogen peroxide has been added. The slurry in agitated form is treated with air to produce a froth. The ilmenite particles will attach themselves to the air bubbles in the froth and may be skimmed off the surface of the solution, the rutile then being recovered from the solution.
    Type: Grant
    Filed: January 12, 1978
    Date of Patent: November 13, 1979
    Assignee: UOP Inc.
    Inventors: William K. Tolley, Beckay J. Nelson
  • Halogenation of lead sulfide
    Patent number: 4173623
    Abstract: Lead sources, and particularly lead sulfide concentrates, are halogenated utilizing a halogen gas in a dry atmosphere at a relatively low temperature to selectively halogenate the lead. The process is improved by effecting the halogenation in a fluidized state in a fluidized bed reactor, the fluidized state of the lead sulfide being accomplished by introducing a mixture of halogen gas and an oxygen-containing gas at a rate sufficient to maintain the lead sulfide in the desired fluidized state. Thereafter, metallic lead may be obtained by leaching the halogenated mixture with brine, filtering to separate elemental sulfur and residue from soluble lead halide. The soluble lead halide is then crystallized and the desired metallic lead is obtained by fused salt electrolysis.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: November 6, 1979
    Assignee: UOP Inc.
    Inventors: J. Mark Richardson, Norbert L. Novinski, II
  • Recovery of titanium metal values
    Patent number: 4172878
    Abstract: Titanium metal values may be recovered from a titanium bearing source such as an ilmenite ore by subjecting the source to a reductive roast, leaching the reduced source with a halogen-containing compound followed by crystallization of the iron halide impurity which is separated from the soluble titanium halide. The soluble titanium halide is then treated with an iron oxide to form titanium dioxide. The yield of titanium dioxide may be greatly improved by effecting the nucleation of the titanium in a manner which comprises adding the iron oxide to the solution without agitation. Upon completion of the nucleation reaction, the solids are then thoroughly dispersed before removing the solid titanium dioxide.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: October 30, 1979
    Assignee: UOP Inc.
    Inventor: William K. Tolley
  • Separation of ilmenite and rutile
    Patent number: 4158041
    Abstract: This invention relates to a process for separating rutile and ilmenite from ilmenite leach tails and is effected by treating the leach tails from an acidic leach to a flotation step whereby gangue is separated from the unreacted ilmenite and rutile. The latter is then roasted at an elevated temperature in a hydrous atmosphere to convert the ilmenite to a magnetic material. Thereafter the ilmenite may then be subjected to a magnetic separation whereby non-magnetic rutile may be recovered while the magnetic portion is recycled for further separation.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: June 12, 1979
    Assignee: UOP Inc.
    Inventor: William K. Tolley
  • Preparation of aromatic diamines
    Patent number: 4157343
    Abstract: Aromatic diamines are prepared by reacting an alkyl formimine which has been obtained by the reaction of an amine possessing a primary or secondary alpha carbon atom with formaldehyde with an aromatic amine in an anhydrous acidic medium. The reaction is usually effected at ambient temperatures and atmospheric pressures and is exemplified by reacting n-hexylformimine with N,N-dimethylaniline in an anhydrous trifluoroacetic acid medium to form p-dimethylamino-N-n-hexylbenzylamine.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: June 5, 1979
    Assignee: UOP Inc.
    Inventor: James P. Shoffner
  • Production of high purity iron powder
    Patent number: 4154608
    Abstract: High purity iron powder may be obtained by treating an iron bearing source which contains impurities such as silica along with minor amounts of aluminum, calcium and magnesium to a series of steps which include grinding the iron bearing source followed by subjecting the ground source to a caustic leach at an elevated temperature and pressure. Thereafter the soluble impurities may be separated from the residue, the latter then being reduced by treatment with hydrogen at an elevated temperature and pressure to convert the iron to the metallic form.
    Type: Grant
    Filed: July 19, 1978
    Date of Patent: May 15, 1979
    Assignee: UOP Inc.
    Inventors: Curtis D. Carey, Martin C. Kuhn, Margaret K. Witte
  • Purification of rutile
    Patent number: 4152252
    Abstract: Rutile which has been separated from ilmenite during a process for obtaining titanium metal values may be recovered in a more simple manner by effecting the water wash of the solid rutile at a pH above about 7.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: May 1, 1979
    Assignee: UOP Inc.
    Inventors: William K. Tolley, Beckay J. Nelson
  • Production of cyclohexene
    Patent number: 4152361
    Abstract: Cyclohexene may be produced from phenylcyclohexane by treating the latter compound at an elevated temperature in the presence of certain solid acidic catalysts such as zeolite or silica-alumina to produce the desired compound.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: May 1, 1979
    Assignee: UOP Inc.
    Inventor: Tamotsu Imai
  • Pressure-sensitive flexible resistors
    Patent number: 4152304
    Abstract: Pressure-sensitive flexible resistors comprising an elastomeric material containing a controlled resistive element or material are prepared by impregnating an elastomeric material such as a rubber with a semiconducting carbonaceous pyropolymeric inorganic refractory oxide material.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: May 1, 1979
    Assignee: Universal Oil Products Company
    Inventor: Thomas D. Tadewald