Patents Represented by Attorney Carl G. Ries
  • Patent number: 6218582
    Abstract: A method for the preparation of methyl tertiary butyl ether is provided wherein a mixture of methanol and substantially peroxides-free tertiary butyl alcohol are catalytically reacted to form a reaction product comprising unreacted methanol, unreacted tertiary butyl alcohol, water, isobutylene and methyl tertiary butyl ether, that is separated into a substantially anhydrous first lighter distillation fraction comprising isobutylene, methanol and methyl tertiary butyl ether and a second heavier distillation fraction comprising methanol, tertiary butyl alcohol and water, and wherein the isobutylene and methanol in the first distillation fraction are reacted to form an isobutylene conversion product that contains additional methyl tertiary butyl ether that is substantially free from tertiary butyl alcohol.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: April 17, 2001
    Assignee: Huntsman International LLC
    Inventors: Charles Joseph Kruse, Kyle Lee Preston, Brian Lawrence Benac
  • Patent number: 6063966
    Abstract: An impure methyl tertiary butyl ether product contaminated with isobutylene, methanol and water is purified by continuous counter-current contact with water and an isobutylene fraction in an extraction zone comprising a counter-current contact tower to provide an overhead raffinate comprising isobutylene, methyl tertiary butyl ether and a minor amount of water and an extract comprising methanol, water and a minor amount of methyl tertiary butyl ether; the overhead raffinate being separated in a methyl tertiary butyl ether purification distillation zone into a lighter distillation fraction comprising isobutylene and water and a heavier distillation fraction consisting essentially of methyl tertiary butyl ether; the lighter distillation fraction being decanted to remove water and to provide a distillate isobutylene fraction that is returned to the contact tower as the isobutylene fraction.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: May 16, 2000
    Assignee: Huntsman ICI Chemicals LLC
    Inventors: Michael Warren Peters, Yu-Hwa Edward Sheu
  • Patent number: 5958192
    Abstract: An extractive distillation agent used for the distillation of propylene oxide contaminated with water, acetone, acetaldehyde and methanol and consisting essentially of ethylene glycol monomethyl ether is fed to an extractive distillation column within about 2 to about 15 stages from the top of the tower to obtain an overhead distillate fraction consisting of essentially anhydrous propylene oxide contaminated with reduced quantities of acetone, acetaldehyde and methanol, and a heavier bottoms distillation fraction containing substantially all of the ethylene glycol monomethyl ether, water and acetone and some of the methanol introduced into the distillation column.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: September 28, 1999
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventor: Peter Stephen Morford
  • Patent number: 5856588
    Abstract: Methyl tertiary butyl ether is prepared from tertiary butyl alcohol and methanol in a plural stage process by (a) reacting tertiary butyl alcohol with methanol in a primary MTBE reaction zone containing a cationic ion-exchange resin catalyst to form a primary reaction product, (b) fractionating the primary reaction product in a primary distillation zone to provide a first lighter, lower boiling distillation fraction comprising isobutylene, methanol and methyl tertiary butyl ether and a first heavier, higher boiling distillation fraction comprising methanol, tertiary butyl alcohol and water, c) contacting the first heavier distillation fraction in a second stage reactor containing a second stage acidic, fluoride-treated Y-zeolite having a silica:alumina ratio of 100:1 to 10:1 and a unit cell size of from 24.20 to 24.45 .ANG. or a fluoride-treated silicoaluminophosphate (SAPO) molecular sieve having a pore size of from 5 .ANG. to 8 .ANG., under conversion conditions including a temperature of from 20.degree.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: January 5, 1999
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventors: Pei-Shing Eugene Dai, John Frederick Knifton
  • Patent number: 5851382
    Abstract: Hydrodesulfurization of cracked naphtha, with minimum attendant hydrogenation of olefins, is effected over a sulfided catalyst bearing (i) a non-noble Group VIII metal, and (ii) a Group VI-B metal, and (iii) a metal of Group I-A, and optionally (iv) a metal of Group II-A, on a support comprising hydrotalcite-like composition, optionally containing less than or equal to 20% by weight of an inert inorganic compound selected from the group consisting of silica, silica-alumina, titania, clays, carbon black, and mixtures thereof, used as a binder.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: December 22, 1998
    Assignee: Texaco Inc.
    Inventor: Chakka Sudhakar
  • Patent number: 5846406
    Abstract: Selective hydrodesulfurization of cracked naphtha, with minimum attendant hydrogenation of olefins, is effected over a novel catalyst composition comprising a sulfided, "manganese oxide octahedral molecular sieve" supported catalyst bearing (i) at least one non-noble Group VIII metal, (ii) at least one Group VI-B metal, optionally (iii) at least one metal of Group I-A, II-A, III-B, or the lanthanide series of rare earths, and optionally (iv) at least one metal of Group I-B. The catalyst of the present invention is highly selective in minimizing the olefin saturation and the resulting octane loss in the cracked naphtha hydrodesulfurization process.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: December 8, 1998
    Assignee: Texaco Inc
    Inventors: Chakka Sudhakar, Chi-Lin O'Young
  • Patent number: 5837640
    Abstract: A naphtha or a middle distillate hydrocarbon is dehydroaromatized by hydrotreating in the presence of a catalyst containing non-noble Group VIII metal and Group VI-B metal on carbon.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: November 17, 1998
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Frank Dolfinger, Jr., Dennis Joseph Rao, John Hazen
  • Patent number: 5830324
    Abstract: In the continuous purification of a propylene oxide feedstock contaminated with water, methanol and acetone wherein an acetone buffer is established in the column, normal distillation conditions are maintained or restored during or after an upset by continuously monitoring predetermined distillation conditions in the acetone buffer zone, and adding additional acetone to the extractive distillation column when the monitored distillation condition deviates from a predetermined value by a predetermined amount.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: November 3, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: James Joseph Downs, Andrew Charles Hiester, Mark Elliott Taylor, Mark Allan Mueller, Michael Warren Peters, William Pleasie Nelson
  • Patent number: 5817229
    Abstract: A hydrocarbon feedstock is brought into contact with activated carbon at a temperature of about 300.degree. to about 650.degree. C. and a pressure of about 0-1000 psig in the absence of added hydrogen to reduce the content of aromatic, sulfur and nitrogen compounds contained therein and to simultaneously lower the specific gravity thereof.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: October 6, 1998
    Assignee: Texaco Inc
    Inventors: Chakka Sudhakar, Regis J. Pellet, Mahendra Somabhai Patel
  • Patent number: 5811620
    Abstract: A tertiary butyl alcohol feedstock is dehydrated to form isobutylene and water in a reactive distillation column having a reactive distillation section in the middle portion thereof containing a bed of a TBA dehydration catalyst and a substantially anhydrous lower boiling isobutylene fraction is recovered adjacent the top of the reactive distillation column and a higher boiling aqueous fraction is recovered adjacent the bottom of the reactive distillation column.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: September 22, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventors: John Frederick Knifton, John Ronald Sanderson, Melvin Ernest Stockton
  • Patent number: 5811597
    Abstract: Methyl tertiary butyl ether is prepared from contaminated TBA by reactively distilling the contaminated TBA in a reactive distillation column to provide a lower boiling isobutylene fraction and a higher boiling aqueous TBA fraction, by distilling the higher boiling aqueous TBA fraction to provide a lower boiling TBA fraction, by charging the lower boiling isobutylene fraction, the lower boiling tertiary butyl alcohol fraction and methanol to an etherification reactor to form an etherification reaction product, by distilling the etherification reaction product to provide a lower boiling fraction containing isobutylene, methanol and methyl tertiary butyl ether by charging the lower boiling fraction to a finishing reactor to react the isobutylene and methanol contained therein to from additional MTBE and by recovering MTBE from the etherification reaction product and the isobutylene conversion product.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: September 22, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: Rei-Yu Judy Hwan, Mark Elliott Taylor, John Frederick Knifton, Melvin Ernest Stockton, John Ronald Sanderson
  • Patent number: 5792890
    Abstract: A tertiary butyl alcohol charge stock contaminated with from about 0.5 to about 2 wt. % of corrosive oxygen-containing impurities, including peroxides and formates, is passed through an oxygenates decomposition reactor containing a bed of a basic zeolite catalyst to decompose the peroxides and oxygen-containing impurities, including peroxides and formates, and to dehydrate a portion of the tertiary butyl alcohol to form isobutylene and water to form a substantially less-corrosive tertiary butyl alcohol feedstock that is substantially free from oxygen-containing impurities, including formates that is suitable for reaction with methanol in a methyl tertiary butyl ether etherification reactor to form a methyl tertiary butyl ether etherification reaction product from which methyl tertiary butyl ether can be recovered.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: August 11, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: Pei-Shing Eugene Dai, Laurence Darrel Neff, Kyle Lee Preston, Rei-Yu Judy Hwan, John Frederick Knifton
  • Patent number: 5789627
    Abstract: Methyl tertiary butyl ether is prepared from contaminated tertiary butyl alcohol and methanol by decomposing peroxides in a peroxides decomposition reactor, by dehydrating the tertiary butyl alcohol to form isobutylene and also decomposing acidic contaminants in a tertiary butyl alcohol dehydration reactor to form a feedstock that is distilled to provide a first lower boiling fraction comprising isobutylene and water; from which isobutylene is recovered for reaction with methanol in an etherification reactor containing a bed of an etherification catalyst to form methyl tertiary butyl ether.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: August 4, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: Rei-Yu Judy Hwan, Kyle Lee Preston
  • Patent number: 5772854
    Abstract: In the purification of an aqueous acetone-contaminated propylene oxide feedstock in an extractive distillation column in the presence of an oxyalkylene glycol extractive distillation agent under distillation conditions selected to promote the formation and maintenance of an acetone buffer in the distillation column, a higher boiling (heavier) distillation fraction containing substantially all of the oxyalkylene glycols, water, and acetone introduced into the extractive distillation column is continuously withdrawn and the higher boiling (heavier) distillation fraction is partially vaporized in a first reboiler; the remaining liquid being partially vaporized in a second reboiler and the vapors being recycled to the extractive distillation column.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: June 30, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventors: William Pleasant Nelson, Mark Elliott Taylor
  • Patent number: 5773634
    Abstract: The liquid and gaseous products formed by reacting oxygen with isobutane in an oxidation reactor are separately processed; the liquid reaction product being charged to a distillation zone and separated into a lower boiling isobutane fraction and a higher boiling fraction comprising tertiary butyl alcohol and tertiary butyl hydroperoxide; the gaseous reaction product comprising inert gases and vaporized and/or entrained isobutane being cooled by an amount sufficient to condense isobutane contained therein for recycle to the oxidation reactor; the remaining gases, including isobutane being charged to a tertiary butyl alcohol absorber to obtain a solution of isobutane in tertiary butyl alcohol that is recycled to the distillation zone.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: June 30, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventors: David Durham Chess, David George Pottratz, Eileen Tovan Nguyen, William Kemp Culbreth, III
  • Patent number: 5770046
    Abstract: Hydrodesulfurization of cracked naphtha, with minimum attendant hydrogenation of olefins, is effected over a sulfided, carbon supported catalyst bearing (i) at least one non-noble Group VIII metal, (ii) at least one Group VI-B metal, (iii) at least one metal of Group I-A, II-A, III-B, or the lanthanide series of rare earths, and (iv) at least one metal of Group I-B.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: June 23, 1998
    Assignee: Texaco Inc
    Inventor: Chakka Sudhakar
  • Patent number: 5763685
    Abstract: MTBE is prepared from TBA and MeOH by passing a feed mixture comprising TBA and MeOH through a primary MTBE reaction zone to form a primary reaction product containing MTBE, unreacted TBA, unreacted MeOH, isobutylene and water; the primary reaction product is fractionated to provide a first lighter distillation fraction comprising isobutylene, MeOH and MTBE and a first higher boiling distillation fraction comprising MeOH, TBA and water and the first higher boiling distillation fraction is charged to a second stage MTBE reaction zone to form a second stage reaction product comprising unreacted MeOH, unreacted TBA water, isobutylene and MTBE.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: June 9, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventors: Charles Joseph Kruse, Kyle Lee Preston, Brian Lawrence Benac
  • Patent number: 5756789
    Abstract: Disclosed is a novel process for the synthesis of a metal-containing aluminophosphate having a layered structure and novel optically active metal-containing aluminophosphates useful as enantio-selective catalysts, which comprises:a) slurring an aluminum source with water;b) adding a phosphorus source and slurring;c) allowing the mixture to stand;d) adding an organic additive;e) allowing the mixture to stand;f) adding a cationic transition metal complexg) heating to 80.degree.-250.degree. C. for 20-180 hours wherein the mole ratio of transition metal complex to organic additive is in the range of 0.1-1.0:1.0.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: May 26, 1998
    Assignee: Texaco, Inc.
    Inventors: David Alan Bruce, Mark Gilmore White, Joseph Aaron Bertrand, Pei-Shing Eugene Dai, Randall Hughes Petty
  • Patent number: 5744667
    Abstract: Gasoline range olefins such as trimethyl pentene are saturated to the corresponding paraffins such as trimethylpentane by hydrogen transfer from lower molecular weight paraffins using a catalyst comprising platinum supported on a large pore borosilicate zeolite which has been partially neutralized by the addition of alkali cations.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: April 28, 1998
    Assignee: Texaco Inc.
    Inventor: Regis J. Pellet
  • Patent number: 5744652
    Abstract: Methyl tertiary butyl ether is prepared from TBA contaminated with oxygen-containing impurities by decomposing the impurities to gaseous products, by charging the thus-treated tertiary butyl alcohol and methanol to an etherification reactor to form an etherification reaction product, by distilling the etherification reaction product to provide a lower boiling fraction containing isobutylene, methanol and methyl tertiary butyl ether by charging the lower boiling fraction to a finishing reactor to react the isobutylene and methanol contained therein to from additional MTBE and by recovering MTBE from the etherification reaction product and the isobutylene conversion product.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: April 28, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: Pei-Shing Eugene Dai, Laurence Darrel Neff, Kyle Lee Preston, Rei-Yu Judy Hwan