By Alkyl Transfer, E.g., Disproportionation, Etc. Patents (Class 585/708)
  • Patent number: 5900522
    Abstract: Process for the preparation of an isobutane/isohexane containing product comprising passing an isopentane feed to a disproportion stage and disproportionating the isopentane feed in the presence of olefinic and/or higher branched paraffinic hydrocarbons by contact with an acid catalyst having an acidity of H.sub.o >8 at a temperature of between C. and C. and withdrawing an isobutane/isohexane containing product.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: May 4, 1999
    Assignee: Haldor Topsoe A/S
    Inventor: Sven Ivar Hommeltoft
  • Patent number: 5763727
    Abstract: A process is provided for the disproportionation of C.sub.3 -C.sub.5 paraffins. Propane, butanes and/or pentanes are reacted over a zeolite catalyst having a low acid activity in a turbulent fluidized bed reactor regenerator system operating at low to moderate pressures.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: June 9, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Nick A. Collins, Mohsen N. Harandi
  • Patent number: 5688975
    Abstract: Molecular sieve compositions have been synthesized which are resistant to the loss of framework atoms. Specifically, the molecular sieves of the invention have the empirical formulamA: (M.sub.w Al.sub.x Si.sub.y)O.sub.2where A is at least one rare earth metal, M is chromium or titanium and "m", "w", "x" and "y" are the mole fractions of A, M, Al and Si respectively. Applicants have discovered that the rare earth metals prevent loss of chromium and titanium from the framework and degradation of the molecular sieve. Along with the composition, a process for preparing the composition and processes using the composition are disclosed and claimed.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: November 18, 1997
    Assignee: UOP
    Inventors: Vinayan Nair, Deng-Yang Jan, Robert Lyle Patton, Ben A. Wilson, Donald F. Best
  • Patent number: 5489727
    Abstract: The disproportionation of isopentane(s) in the presence of hydrogen fluoride as the catalyst is improved by adding at least one C.sub.6 -C.sub.18 (preferably C.sub.6 -C.sub.8) isoalkane to the isopentane feed.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: February 6, 1996
    Assignee: Phillips Petroleum Company
    Inventors: Bruce B. Randolph, Marvin M. Johnson
  • Patent number: 5414184
    Abstract: C.sub.4 -C.sub.15 alkanes (preferably C.sub.4 -C.sub.8 alkanes) are disproportionated in the presence of at least one alkylaluminum chloride (preferably isobutylaluminum dichloride), at least one chloroalkane (preferably carbon tetrachloride), and at least one solid material (selected from a group comprising alumina, silica, aluminosilicates, various other aluminum compounds, various boron compounds, and sulfonated styrene polymers).
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: May 9, 1995
    Assignee: Phillips Petroleum Company
    Inventors: An-hsiang Wu, Bruce B. Randolph, Marvin M. Johnson
  • Patent number: 5397457
    Abstract: A hydrocarbon fraction, preferably in the kerosene boiling range containing a substantial proportion of C.sub.9 + hydrocarbons is contacted with an n-paraffin fraction, such as n-pentane, over a catalyst of acidic functionality, such as Pd/zeolite beta, under conditions of hydrocracking sufficient to convert the feed to lower boiling range materials of high octane number. The n-paraffin cofeed promotes isomerization and suppresses production of n-paraffins.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: March 14, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Mohsen N. Harandi, Roger A. Morrison
  • Patent number: 5396016
    Abstract: There is provided a process for isomerizing and/or disproportionating a paraffin over a catalyst comprising MCM-36. Examples of paraffins which may be isomerized and/or disproportionated include those having from 3 to 10 carbon atoms. The reaction may take place in the presence or absence of cofed hydrogen, and the catalyst may optionally include a hydrogenation metal, such as platinum. An example of a particular reaction is the disproportionation of isopentane to produce a product comprising isobutane and branched hexanes.
    Type: Grant
    Filed: August 19, 1993
    Date of Patent: March 7, 1995
    Assignee: Mobil Oil Corp.
    Inventors: Gregory A. Jablonski, David O. Marler, Wieslaw J. Roth
  • Patent number: 5352812
    Abstract: The metathesis of functionalized and unfunctionalized acyclic olefins using catalyst compositions containing iridium and silver in a molar ration of 3 to 1.
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: October 4, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jerald Feldman, Marcia B. France
  • Patent number: 5171912
    Abstract: A process is disclosed that provides a high conversion of n-butane to C.sub.5 + gasoline by integrating the medium pore metallosilicate catalyzed process for fresh n-butane conversion to C.sub.5 + gasoline with a medium pore metallosilicate catalyzed process for propane conversion in a manner which allows a portion of the propane by-product of n-butane conversion to be converted to C.sub.4 + alkanes, followed by recycle of the n-butane portion of the C.sub.4 + alkanes. It has been discovered that separation of the products from the separate propane and n-butane conversion steps can be carried out concurrently in a single fractionator to provide the C.sub.5 + gasoline product and the propane and butane recycle streams. Preferably, the fractionator butane cut is treated in a deisobutanizer to recover isobutane and n-butane recycle. A further discovery utilizes the common fractionator not only to separate the products from the conversion processes but to concurrently separate a mixed fresh C.sub.3 -C.sub.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: December 15, 1992
    Assignee: Mobil Oil Corp.
    Inventor: Mohsen N. Harandi
  • Patent number: 5099014
    Abstract: Compositions containing sulfuric acid and one or more of certain chalcogen-containing compounds in which the chalcogen compound/H.sub.2 SO.sub.4 molar ratio is below 2 contain the mono-adduct of sulfuric acid which is catalytically active for promoting organic chemical reactions. Suitable chalcogen-containing compounds have the empirical formula ##STR1## wherein X is a chalcogen, each of R.sub.1 and R.sub.2 is independently selected from hydrogen, NR.sub.3 R.sub.4, and NR.sub.5, at least one of R.sub.1 and R.sub.2 is other than hydrogen, each of R.sub.3 and R.sub.4 is hydrogen or a monovalent organic radical, and R.sub.5 is a divalent organic radical. Such compositions are useful for catalyzing organic reactions such as oxidation, oxidative addition, reduction, reductive addition, esterification, transesterification, hydrogenation, isomerication (including racemization of optical isomers), alkylation, polymerization, demetallization of organometallics, nitration, Friedel-Crafts reactions, and hydrolysis.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: March 24, 1992
    Inventor: Donald C. Young
  • Patent number: 4940829
    Abstract: Neopentane is prepared by reaction of neohexane with free hydrogen, in the presence of the supported palladium catalyst, which preferably additionally contains nickel and/or cobalt.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: July 10, 1990
    Assignee: Phillips Petroleum Company
    Inventor: Charles A. Drake
  • Patent number: 4929793
    Abstract: Low boiling paraffinic feedstreams such as solvent raffinates and straight run naphthas are disproportionated in the presence of an intermediate pore size zeolite such as ZSM-5 under conditions of moderately elevated temperatures and pressures to produce products boiling in the middle distillate range, such as jet fuel and diesel fuel, of highly paraffinic character.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: May 29, 1990
    Assignee: Mobil Oil Corporation
    Inventor: Roger A. Morrison
  • Patent number: 4783554
    Abstract: Alkylamines are self-alkylated to longer carbon chain alkylamines using a catalyst mixture comprising of aluminum chloride in combination with cobalt and/or ruthenium carbonyl.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: November 8, 1988
    Assignee: Shell Oil Company
    Inventor: Kuo-Hua Chao
  • Patent number: 4781814
    Abstract: Crystalline molecular sieves having three-dimensional microporous framework structure of MO.sub.2, AlO.sub.2, and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis are expressed by the formula:mR: (M.sub.x Al.sub.y P.sub.z)O.sub.2wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present per mole of (M.sub.x Al.sub.y P.sub.z)O.sub.2 ; "M" represents at least two elements capable of forming framework tetrahedral oxides and selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium; and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is disclosed. The catalyst is useful in the cracking and hydrocracking of various hydrocarbonaceous feeds.
    Type: Grant
    Filed: May 6, 1987
    Date of Patent: November 1, 1988
    Assignee: Union Carbide Corporation
    Inventors: Edith M. Flanigen, Brent M. Lok, Robert L. Patton, Stephen T. Wilson
  • Patent number: 4754100
    Abstract: An improved process is described for converting propane to more valuable hydrocarbons such as butanes and C.sub.5.sup.+ aliphatics over an acidic catalyst having the structure of ZSM-5 by adding a mono- olefin to the propane feed.
    Type: Grant
    Filed: August 6, 1987
    Date of Patent: June 28, 1988
    Assignee: Mobil Oil Corporation
    Inventors: Charles M. Sorensen, Rene B. LaPierre, Roger A. Morrison, Philip Varghese
  • Patent number: 4686316
    Abstract: Process for converting propane to a mixture of normal butane and isobutane by contact with a ZSM-5 type zeolite in the absence of added hydrogen. The isobutane formed may be used to manufacture alkylate for motor fuel.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: August 11, 1987
    Assignee: Mobil Oil Corporation
    Inventor: Roger A. Morrison
  • Patent number: 4676885
    Abstract: The invention disclosed herein comprises a process for the selective upgrading of combustion quality of a distillate transportation fuel by careful selective dehydrogenation, disproportionation and hydrogenation to convert cycloparaffinic materials contained in the distillate transportation fuel to acyclic paraffinic hydrocarbons, wherein said conversion is undertaken by first forming cyclomonoolefinic hydrocarbons from cycloparaffinic hydrocarbons via dehydrogenation, disproportionating the cyclomonoolefinic hydrocarbons to acyclic di-.alpha.-olefin hydrocarbons and then selectively hydrogenating said di-.alpha.-olefin hydrocarbons in the presence of hydrogen to saturate the double bonds of the di-.alpha.-olefin to form acyclic paraffinic hydrocarbons. The selective disproportionation reaction includes the addition of ethylene or an ethylene acting material to ring open the cyclomonoolefinic material.
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: June 30, 1987
    Assignee: Shell Oil Company
    Inventor: Warren V. Bush
  • Patent number: 4551236
    Abstract: Titanium-containing molecular sieves are disclosed having use as molecular sieves and as catalyst compositions in hydrocarbon conversion and other processes. The instant invention employs novel titanium-containing molecular sieves comprising titanium, aluminum, phosphorus and oxygen and are generally employable in hydrocarbon conversion processes, including cracking, hydrocracking and hydrotreating.
    Type: Grant
    Filed: July 3, 1984
    Date of Patent: November 5, 1985
    Assignee: Union Carbide Corporation
    Inventors: Brent M. T. Lok, Bonita K. Marcus, Edith M. Flanigen
  • Patent number: 4508618
    Abstract: Natural gasoline of low octane value derived from natural gas is upgraded to higher octane value by means of catalyst consisting essentially of trifluoromethanesulfonic acid at temperatures between about C. and about C., and preferably between about C. and about C.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: April 2, 1985
    Assignee: El Paso Products Company
    Inventor: George A. Olah
  • Patent number: 4368345
    Abstract: The present invention relates to a process for the disproportionation of n-olefins comprising contacting the olefin feed with a catalyst composition comprising molybdenum oxide or tungsten oxide supported on silica. The catalyst composition is produced by impregnating a silica support with an alcoholic solution of a halide of a metal selected from molybdenum and tungsten, removing the alcoholic solvent by evaporation, and heat treating the impregnated support at an elevated temperature such that (a) the metal halide is converted to the corresponding oxide and/or an oxy-salt and (b) the halogen content thereof is reduced to less than 0.1% by weight of the total composition. By using a catalyst produced by this method, it is possible to carry out the process so as to selectively produce linear higher olefins.
    Type: Grant
    Filed: December 22, 1981
    Date of Patent: January 11, 1983
    Assignee: BP Chemicals Limited
    Inventor: Kathleen F. Dickinson
  • Patent number: 4260839
    Abstract: A process for effecting an endothermic and an exothermic reaction, under conversion conditions, in a single reaction zone wherein ethane is endothermically converted to C.sub.3 + hydrocarbons, and wherein an unconverted portion of ethane is simultaneously exothermically hydrogenated to methane in the presence of a catalyst system comprising a crystalline aluminosilicate zeolite having a uniform structure characterized by pores, the major dimension of which is less than 6 Angstroms and ZSM-5 type aluminosilicate zeolite, containing a minor amount of Zn in combination with a Group VIII noble metal or a Group IB metal, the exothermic reaction providing sufficient heat to maintain the reaction zone at a temperature capable of sustaining the endothermic reaction.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: April 7, 1981
    Assignee: Mobil Oil Corporation
    Inventors: Nai Y. Chen, Werner O. Haag, Tracy J. Huang