Definite Molecular Weight Product, E.g., Dimer, Etc. Patents (Class 585/510)
  • Patent number: 7002053
    Abstract: The invention relates to a process for preparing high-purity diisobutene by reaction of isobutene or isobutene-containing hydrocarbon mixtures over a solid acidic ion-exchange resin containing sulfonic acid groups whose protons have been partly replaced by metal ions and to the use of the diisobutene.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: February 21, 2006
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Franz Nierlich, Lothar Kerker, Udo Peters, Wilfried Büschken, Andreas Beckmann
  • Patent number: 6963018
    Abstract: Novel processes for the production of polyolefins, other polymers, and oxygenated compounds, such as polypropylene, polyethylene, polybutene-1, poly(isobutylene), polystyrene, poly(1,3-butadiene), ethylene oxide, propylene oxide, acrylonitrile, acrolein and others, within gas phase and slurry phase type reactors, from olefins produced via the catalytic dehydrogenation of corresponding paraffins and other monomers inside permeable catalytic membrane reactors or non-permeable conventional reactors. The developed processes can produce both homopolymers and copolymers depending on the operating conditions of the preceding dehydrogenation permreactor. The invented processes utilize integrated separation, recycling and re-reaction operations of the unconverted olefins, paraffins and other utilized monomers and hydrocarbon molecules.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: November 8, 2005
    Inventors: Savvas Vasileiadis, Zoe Ziaka-Vasileiadou
  • Patent number: 6897347
    Abstract: The invention relates to a method for dimerizing isobutene, wherein, in dimerizing conditions, the isobutene is brought into contact with a porous cation exchange resin comprising a styrene polymer, which is cross-linked with divinyl benzene, and any sulphonic acid groups adhering to the polymer. The harmful deactivation of this catalyst, which is caused by the accumulation of the oligomers and polymers of isobutene and other C4-olefins in the cation exchange resin catalyst, is essentially decreased by selecting the cation exchange resin from a group including cation exchange resins, the acid capacity of which is 4.7 equivalents/kg at a minimum, and the portion of divinyl benzene units of which is 5% by weight at a minimum and smaller than 20% by weight.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: May 24, 2005
    Assignee: Fortum Oyj
    Inventors: Veli-Matti Purola, Sami Toppinen, Antti Pyhälahti, Marina Lindblad, Johan Grönqvist, Pirjo Siira
  • Patent number: 6890423
    Abstract: The invention provides distillate fuel blend components with improved seal swell and lubricity properties obtained from Fischer Tropsch products. The blends contain a highly paraffinic distillate fuel component and distillate-boiling alkylcycloparaffins and/or distillate-boiling alkylaromatics. The invention further provides processes for obtaining such blends using the products of Fischer Tropsch processes. Finally, the invention provides methods for improving seal swell and lubricity properties for distillate fuels.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: May 10, 2005
    Assignee: Chevron U.S.A. Inc.
    Inventor: Dennis J. O'Rear
  • Patent number: 6881323
    Abstract: The present invention relates to new crystalline zeolite SSZ-54 prepared using a templating agent comprising N-isopropyl ethylenediamine, or a mixture of 1-N-isopropyl diethylenetriamine and isobutylamine, and processes employing SSZ-54 in a catalyst.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: April 19, 2005
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stacey Zones
  • Patent number: 6875900
    Abstract: An oligomerization process for the production of higher aliphatic olefins is disclosed. In the process, a liquid oligomerization feed stream comprising lighter aliphatic olefins is passed to a reactor vessel. The liquid oligomerization feed stream is transported upwardly in the reactor vessel against gravity through a fixed bed of solid oligomerization catalyst under oligomerization conditions. The catalyst has a Hammett acidity value of ?4 or less. A liquid oligomerization effluent stream is recovered comprising product higher aliphatic olefins.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: April 5, 2005
    Assignee: UOP LLC
    Inventor: William J. Koves
  • Patent number: 6863778
    Abstract: A process for the separation of diisobutylene from tertiary butyl alcohol utilizing pressure swing azeotropic distillation to achieve the desired separation. The pressure swing azeotropic distillation takes advantage of the fact that different azeotropes are formed at different pressures. Isobutylene in C4 streams is oligomerized in the presence of tertiary butyl alcohol to produce the diisobutylene. Tertiary butyl alcohol is present in the dimerization because it improves the selectivity to the dimer (diisobutylene) by suppressing further reaction to the trimer or higher. The diisobutylene is separated from the tertiary butyl alcohol utilizing two distillation columns. The first distillation is operated at a higher pressure than the second such that the minimum boiling azeotropes of tertiary butyl alcohol and diisobutylene have different concentrations of tertiary butyl alcohol. Diisobutylene is removed as bottoms from the first distillation column and unreacted C4's are removed as overheads at 60-130 psig.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: March 8, 2005
    Assignee: Catalytic Distillation Technologies
    Inventors: Jianhua Wang, Nishit Sahay, Mitchell E. Loescher, Montri Vichailak
  • Patent number: 6846965
    Abstract: C2-C8-olefins are oligomerized in a process in which a stream of an olefin-containing hydrocarbon mixture is passed over a heterogeneous, nickel-containing oligomerization catalyst in n successive adiabatically operated reaction zones, where n?2, and the hydrocarbon mixture experiences a temperature increase 66 Treact in each reaction zone and the hydrocarbon mixture enters the first reaction zone at a temperature Tin and before entering each further reaction zone is cooled to a temperature which in each case may be up to 20° C. above or below Tin, and the relative catalyst volumes of the individual reaction zones are such that the difference in ?Treact between any two reaction zones is not more than 20° C.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: January 25, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Schulz, Marc Walter, Hans-Peter Neumann, Wolfgang Brox
  • Patent number: 6841711
    Abstract: A process for making a lube base stock wherein an olefinic feedstock is contacted with an oligomerization catalyst in a catalytic distillation unit to produce a product having a higher number average molecular weight than the olefinic feedstock. That product is separated zone in the catalytic distillation unit into a light byproduct fraction and a heavy product fraction that includes hydrocarbons in a lube base stock range.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: January 11, 2005
    Assignee: Chevron U.S.A. Inc.
    Inventors: Russell R. Krug, Dennis J. O'Rear
  • Publication number: 20040204621
    Abstract: In process for the oligomerization of an alphaolefin, a carboxylic acid modifier, such as acetic acid, is used to increase the amount of trimer and tetramer in the product.
    Type: Application
    Filed: April 30, 2004
    Publication date: October 14, 2004
    Inventors: Eduardo J. Baralt, Russell Bak
  • Patent number: 6787577
    Abstract: Process for increasing the branching in products from a slurry-type Fischer-Tropsch unit by use of potassium promoted iron-based catalyst, an integrated process for increasing the yield of lubricating base oils, and an iron-based Fischer-Tropsch catalyst composition having a high atomic ratio of potassium promoter.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: September 7, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventors: Burtron H. Davis, Stephen J. Miller
  • Patent number: 6753389
    Abstract: Polyisobutene is prepared by cationic polymerization of isobutene and/or isobutene-containing hydrocarbons in the liquid phase in the presence of a complex of BF3 and at least one cocatalyst which is preferably chosen from oxygen-containing compounds, the BF3/cocatalyst complex being produced in situ by adding BF3 and cocatalyst to a reaction stream, wherein BF3 and oxygen-containing cocatalyst are added to the reaction stream via a common binary nozzle comprising an outlet for BF3 and an outlet for the oxygen-containing cocatalyst. The invention also describes a binary nozzle having a centrally arranged outlet for the catalyst.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: June 22, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Peter Rath, Dieter Hahn, Gerhard Sandrock, Frans van Deyck, Bart Vander Straeten, Eddy De Vree
  • Patent number: 6734329
    Abstract: In process for the oligomerization of an alphaolefin, a carboxylic acid modifier, such as acetic acid, is used to increase the amount of trimer and tetramer in the product.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: May 11, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventors: Eduardo J. Baralt, Russell Bak
  • Patent number: 6700030
    Abstract: A process for converting hydrocarbons in the presence of a catalyst is described that is carried out in a three-phase reactor in which the liquid Peclet number is in the range 0 (excluded) to about 10, with a superficial gas velocity Ug that is preferably less than 35 cm.s−1, to encourage gas transfer into the liquid phase and avoid too much attrition of the catalyst grains.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: March 2, 2004
    Assignee: Institut Francais du Petrole
    Inventors: Jean-Marc Schweitzer, Pierre Galtier, Francois Hugues, Cristina Maretto
  • Patent number: 6700027
    Abstract: A process for increasing the yield of C10 plus hydrocarbon products from a Fischer-Tropsch plant which comprises (a) recovering a Fischer-Tropsch condensate fraction boiling below about 700 degrees F. from the Fischer-Tropsch plant, wherein said fraction contains at least 10 weight percent and preferably more olefins; (b) contacting the olefins in the Fischer-Tropsch condensate fraction under oligomerization conditions, at a reaction temperature between about 650 degrees F. and 800 degrees F. with an oligomerization catalyst comprising active chromium on an inert support; and (c) recovering a C10 plus hydrocarbon product.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: March 2, 2004
    Assignee: Chevron U.S.A. Inc.
    Inventors: David R. Johnson, Christopher A. Simmons
  • Publication number: 20040030212
    Abstract: A process for the dimerization of at least one olefin with a carbon number between 2 and 10 by contacting the feed with a catalyst system comprising at least: (a) tectometallosilicate zeolite with having TON-type structure, (b) tectometalloslicate zeolite with having MTT-type structure, (c) tectometallosilicate zeolite with the same structure as that of the ZSM-48 zeolite, or (d) silicoaluminophosphate (SAPO) zeo-type with AEL-type structure; under dimerization condition to produce highly branched olefins.
    Type: Application
    Filed: June 30, 2003
    Publication date: February 12, 2004
    Inventors: Farouk Al-Soufi, Sami A.I. Barri, Yajnavalkya Subrai Bhat, Altaf Husain
  • Patent number: 6689927
    Abstract: A process for the production of C8 alkenes with high selectivities to 2,4,4-trimethylpentene by the oligomerization of isobutene and/or n-butene at lower temperatures is disclosed. Higher proportions of heavy paraffins mixed with the butene feed in the oligomerization zone improve the selectivity to 2,4,4-trimethylpentene along with better selectivity to octene and lower selectivity to dodecene. Additionally, we have found that n-butene codimerizes with isobutene selectively to 2,4,4-trimethylpentene.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: February 10, 2004
    Assignee: UOP LCC
    Inventors: Robert R. Frame, Laurence O. Stine, Hayim Abrevaya
  • Patent number: 6660898
    Abstract: A process for dimerizing light olefinic hydrocarbons in a reaction zone containing a solid acidic catalyst. The process comprises recovering a reaction zone effluent which contains unreacted olefinic hydrocarbons, converting the unreacted olefinic hydrocarbons into an intermediate product in the effluent and separating the intermediate product from the effluent. By decomposing the separated intermediate product the unreacted olefinic hydrocarbons can be recovered and recycled to the reaction zone. By means of the invention, the yield of the product and the lifetime of the catalyst can be improved in a direct dimerization process of light olefins.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: December 9, 2003
    Assignee: Fortum Oil & Gas Oy
    Inventors: Antti Pyhälahti, Juhani Aittamaa
  • Publication number: 20030204122
    Abstract: A process for the dimerization of isobutene wherein tertiary butyl alcohol is used to enhance the selectivity of the catalyst to the dimer is disclosed wherein the tertiary butyl alcohol is removed from the diisobutene product by water wash. The water/TBA stream is then subjected to reextraction to remove the TBA for recycle to the dimerization reactor. The dimerization is preferably carried out in a reactor wherein the pressure is controlled to maintain the reaction mixture at is boiling point. Additional dimerization is carried out in a distillation column reactor that acts as a debutanizer to separate the unreacted isobutene form the product and the tertiary butyl alcohol.
    Type: Application
    Filed: May 27, 2003
    Publication date: October 30, 2003
    Applicant: CATALYTIC DISTILLATION TECHNOLOGIES
    Inventor: Mitchell E. Loescher
  • Publication number: 20030166456
    Abstract: A process for the trimerisation of olefins is disclosed, comprising contacting a monomeric olefin or mixture of olefins under trimerisation conditions with a catalyst which comprises (a) a source of chromium, molybdenum or tungsten (b) a ligand containing at least one phosphorus, arsenic or antimony atom bound to at least one hydrocarbyl or heterohydrocarbyl group having a polar substituent, but excluding the case where all such polar substituents are phosphane, arsane or stibana groups; and optionally (c) an activator.
    Type: Application
    Filed: January 10, 2003
    Publication date: September 4, 2003
    Inventor: Duncan Frank Wass
  • Patent number: 6613108
    Abstract: The invention relates to process for dimerizing olefinic hydrocarbon feedstock, to hydrocarbon compositions and to fuel components produced by the process. According to the invention, fresh olefinic hydrocarbon feedstock is fed to a reaction zone of a system including at least one reaction zone and at least one distillation zone. The olefinic hydrocarbon feedstock is contacted with an acidic catalyst in the presence of an oxygenate at conditions in which at least a part of the olefins dimerizes. The effluent from the reaction zone is conducted to the distillation zone where dimerized reaction product is separated from effluent, and at least one flow comprising oxygenate is withdrawn from the side of at least one distillation column. The flow is circulated from distillation zone back to dimerization. The reaction mixture is recovered and optionally hydrogenated to form a parafinic reaction product.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: September 2, 2003
    Assignee: Fortum Oil & Gas Oy
    Inventors: Juhani Aittamaa, Juha Jakkula, Petri Lindqvist, Matti Koskinen, Juha Linnekoski, Outi Krause, Mauri Sourander, Jyrki Ignatius, Antti Pyhälahti
  • Publication number: 20030149198
    Abstract: Novel metal complexes, particularly chromium complexes, which contain at least one tridentate ligand are disclosed and prepared. Olefins, particularly ethylene, can be reacted to form butene and/or other homo- or co-oligomers and/or polymers with high &agr;-olefin concentrations by contacting a metal catalyst which contains a transition metal, particularly chromium, complexes having per metal atom at least one tridentate ligand with N, O, or N and O coordinating sites.
    Type: Application
    Filed: December 10, 2001
    Publication date: August 7, 2003
    Inventors: Brooke L. Small, Angel Jose Marcucci
  • Patent number: 6602922
    Abstract: A process for increasing the yield of olefinic products from a Fischer-Tropsch unit and increasing the yield of products within the lube and diesel boiling range by use of a potassium promoted iron-based catalyst.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: August 5, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventors: Burtron H. Davis, Stephen J. Miller
  • Patent number: 6596913
    Abstract: A process for the dimerization of isobutene wherein tertiary butyl alcohol is used to enhance the selectivity of the catalyst to the dimer is disclosed wherein the tertiary butyl alcohol is removed from the diisobutene product by water wash. The water/TBA stream is then subjected to reextraction to remove the TBA for recycle to the dimerization reactor. The dimerization is preferably carried out in a reactor wherein the pressure is controlled to maintain the reaction mixture at is boiling point. Additional dimerization is carried out in a distillation column reactor that acts as a debutanizer to separate the unreacted isobutene form the product and the tertiary butyl alcohol.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: July 22, 2003
    Assignee: Catalytic Distillation Technologies
    Inventor: Mitchell E. Loescher
  • Publication number: 20030125594
    Abstract: Provided is a catalyst formulation which exhibits extended catalyst life. The formulation comprises a mixture of a ceramic foam material uniformly interspersed between the solid catalyst particles, with the volume percent of ceramic material in the mixture preferably ranging from 20 to 60 volume %. The catalyst formulation is particularly applicable to solid catalyst particles comprised of a phosphoric acid impregnated substrate, and is particularly useful for processes such as catalytic hydrocarbon condensation processes.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 3, 2003
    Applicant: UNITED REFINING COMPANY
    Inventor: John H. Moore
  • Publication number: 20030100811
    Abstract: The present invention relates to processes for making a reaction product comprising trimethylpentene(s) which comprises contacting a C4 olefinic feedstock containing isobutene and n-butene(s) with a catalyst comprising zeolite beta under conditions allowing selective dimerization of isobutene to trimethylpentene(s). It also relates to the products obtained by these processes.
    Type: Application
    Filed: August 13, 2002
    Publication date: May 29, 2003
    Inventors: Jihad Mohammed Dakka, Marc O.J. Geelen, Georges Marie Mathys, Paul William Allen
  • Publication number: 20030092948
    Abstract: The invention relates to a process for alkylating a hydrcarbon feed which comprises contacting the hydrocarbon feed to be alkylated with an alkylation agent in the presence of a catalyst comprising a solid acid, a hydrogenation component consisting essentially of one or more Group VIII noble metals, and at least about 0.05 wt % of sulfur, based on the total weight of the catalyst composition. The invention further pertains to a catalyst suitable for said process and to a process for the preparation of said catalyst. The use of said catalyst results in a high conversion of the alkylation agent, a high C5+ alkylate yield, and a good stability, while the selectivity has improved over the use of a comparable catalyst without sulfur.
    Type: Application
    Filed: October 22, 2002
    Publication date: May 15, 2003
    Inventors: Emanuel Hermanus van Broekhoven, Pieter Bogaard
  • Publication number: 20030088134
    Abstract: The invention relates to a method for dimerizing isobutene, wherein, in dimerizing conditions, the isobutene is brought into contact with a porous cation exchange resin comprising a styrene polymer, which is cross-linked with divinyl benzene, and any sulphonic acid groups adhering to the polymer. The harmful deactivation of this catalyst, which is caused by the accumulation of the oligomers and polymers of isobutene and other C4-olefins in the cation exchange resin catalyst, is essentially decreased by selecting the cation exchange resin from a group including cation exchange resins, the acid capacity of which is 4.7 equivalents/kg at a minimum, and the portion of divinyl benzene units of which is 5% by weight at a minimum and smaller than 20% by weight.
    Type: Application
    Filed: April 30, 2002
    Publication date: May 8, 2003
    Inventors: Veli-Matti Purola, Sami Toppinen, Antti Pyhalahti, Marina Lindblad, Johan Gronqvist, Pirjo Siira
  • Publication number: 20030078462
    Abstract: A process is described for the hydrogenation of olefinic streams containing sulfurated compounds, obtained starting from hydrocarbon cuts containing isobutene (by means of selective dimerization), characterized by fractionating said streams in one or more distillation columns and hydrogenating separately the two fractions obtained. The stream at the head, with a minimum content of sulfurated compounds, is hydrogenated with conventional catalysts based on nickel or noble metals (Platinum and/or Palladium), extremely active but also very sensitive to sulfur, whereas the bottom of the column, rich in sulfurated compounds, is treated with bimetallic catalysts (for example Ni/Co and/or Ni/Mo), less active but not deactivated by sulfur.
    Type: Application
    Filed: October 7, 2002
    Publication date: April 24, 2003
    Applicant: SNAMPROGETTI S.p.A.
    Inventors: Marco Di Gerolamo, Roberto Catani, Mario Marchionna
  • Publication number: 20030050522
    Abstract: A method for operating a dimerization reactor that receives a hydrocarbon feed and produces an output stream comprising a light hydrocarbon component, a dimer and an alcohol component comprises: (a) separating the first output stream into a top stream containing the light hydrocarbon and a bottom stream containing the dimer, with the alcohol being present in the top stream or the bottom stream or both; (b) contacting at least one of the bottom and top streams with a water stream so as to extract at least a major portion of the alcohol therefrom, thereby forming an water/alcohol stream; (c) contacting the water/alcohol stream with a hydrocarbon stream so as to extract at least a major portion of the alcohol present in the water/alcohol stream into the hydrocarbon stream, thereby forming an alcohol-enriched hydrocarbon stream; and (d) feeding the alcohol-enriched hydrocarbon stream into the dimerization reactor.
    Type: Application
    Filed: September 5, 2002
    Publication date: March 13, 2003
    Applicant: Fortum Oyj
    Inventors: Matti Nurminen, Ronald Birkhoff, Anand Subramanian
  • Publication number: 20030050523
    Abstract: A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component of at least one lanthanide element or yttrium component, which is preferably ytterbium, and at least one platinum-group metal component which is preferably platinum.
    Type: Application
    Filed: August 29, 2001
    Publication date: March 13, 2003
    Inventors: Ralph D. Gillespie, Michelle J. Cohn
  • Patent number: 6518473
    Abstract: Lube base stock compositions, and methods for preparing the compositions, are disclosed. The methods involve subjecting a predominantly C5-11 olefin-containing feedstock to dimerization conditions, preferably using nickel ZSM-5 as the dimerization catalyst, to give a first product where the majority of the olefins in the olefinic feed are converted to hydrocarbons predominantly in the C10-22 range. The first product, optionally combined with an olefin-containing feed in the C10-22 range, preferably in the C12-18 range, is subjected to an additional dimerization step, using the same or a similar dimerization catalyst, to provide a second product that includes hydrocarbons in the lube base stock range. The olefinic feedstock may include paraffins as well as olefins, which paraffins do not participate in the dimerization reactions. Accordingly, the second product includes relatively heavy hydrocarbons in the lube base stock range, as well as the relatively light unreacted paraffins (and any unreacted olefins).
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: February 11, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stephen J. Miller, Russell R. Krug
  • Patent number: 6500999
    Abstract: A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by means of selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out in a tubular reactor using a feeding containing isobutene in quantities of less than 20% by weight and with a molar ratio linear olefins/isobutene greater than 3, preferably operating at a reaction temperature ranging from 30 to 120° C., at a pressure of less than 5 MPa and at feeding space velocities of less than 60 h−1.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: December 31, 2002
    Assignee: Snamprogetti S.p.A.
    Inventors: Mario Di Girolamo, Mario Marchionna, Lorenzo Tagliabue
  • Publication number: 20020177744
    Abstract: Linear 1-butene dimers and other linear alpha-olefin dimers are manufactured in high yield and with high selectivity by coupling of alpha-olefins. The coupling is accomplished by contacting alpha olefins with an iron-based catalyst activated with an aluminum-based co-catalyst. The catalyst is structured to preclude formation of multiple dimer products, and the byproducts of the olefin coupling consist almost exclusively of methyl branched olefin dimers. The dimers have potentially diverse use in areas stretching form pharmaceuticals to plastics. Linear 1-butene dimers may be particularly useful in the production of plasticizer alcohols which may in turn be used to manufacture high quality plastics with reduced leaching.
    Type: Application
    Filed: January 24, 2002
    Publication date: November 28, 2002
    Inventors: Brooke L. Small, Eduardo J. Baralt
  • Publication number: 20020128530
    Abstract: Lube base stock compositions, and methods for preparing the compositions, are disclosed. The methods involve subjecting a predominantly C5-11 olefin-containing feedstock to dimerization conditions, preferably using nickel ZSM-5 as the dimerization catalyst, to give a first product where the majority of the olefins in the olefinic feed are converted to hydrocarbons predominantly in the C10-22 range. The first product, optionally combined with an olefin-containing feed in the C10-22 range, preferably in the C12-18 range, is subjected to an additional dimerization step, using the same or a similar dimerization catalyst, to provide a second product that includes hydrocarbons in the lube base stock range. The olefinic feedstock may include paraffins as well as olefins, which paraffins do not participate in the dimerization reactions. Accordingly, the second product includes relatively heavy hydrocarbons in the lube base stock range, as well as the relatively light unreacted paraffins (and any unreacted olefins).
    Type: Application
    Filed: January 11, 2001
    Publication date: September 12, 2002
    Inventors: Stephen J. Miller, Russell R. Krug
  • Patent number: 6433238
    Abstract: A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out in the presence of tertiary alcohols, alkyl ethers and primary alcohols in such a quantity as to have, in the feeding, a molar ratio tertiary alcohols+alkyl ethers+primary alcohols/isobutene higher than 0.1, a molar ratio tertiary alcohols/isobutene lower than 0.2 and a molar ratio primary alcohols/isobutene lower than 0.2, preferably operating at a reaction temperature ranging from 30 to 120° C., at a pressure lower than 5 MPa and feeding space velocities of less than 30 h−1.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: August 13, 2002
    Assignees: Snamprogetti S.p.A., Ecofuel S.p.A.
    Inventors: Marco Di Girolamo, Mario Marchionna, Lorenzo Tagliabue
  • Patent number: 6399843
    Abstract: An oligomerization process for the production of higher aliphatic olefins is disclosed. In the process, a liquid oligomerization feed stream comprising lighter aliphatic olefins is passed to a reactor vessel. The liquid oligomerization feed stream is transported upwardly in the reactor vessel against gravity through a fixed bed of solid oligomerization catalyst under oligomerization conditions. The catalyst has a Hammett acidity value of −4 or less. A liquid saturate stream comprising paraffins is passed into contact with the feed stream and the catalyst. A liquid oligomerization effluent stream is recovered comprising the paraffins and product higher aliphatic olefins.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: June 4, 2002
    Assignee: UOP LLC
    Inventor: William J. Koves
  • Patent number: 6395948
    Abstract: A process for preparing very high viscosity polyalphaolefins using an acidic ionic liquid oligomerization catalyst in the absence of an organic diluent and the products formed thereby.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: May 28, 2002
    Assignee: Chevron Chemical Company LLC
    Inventors: Kenneth D. Hope, Michael S. Driver, Thomas V. Harris
  • Patent number: 6384291
    Abstract: A method of preparing a catalyst system which comprises mixing a first solid material comprising at least one perfluoroalkylsulfonic acid salt with a second solid material comprising at least one silanol comprising hydroxy groups and silicon to form a gel comprising silica and the at least one perfluororalkylsulfonic acid salt, and contacting the gel with an acidic solution to convert at least a portion of the at least one perfluoroalkylsulfonic acid salt to at least one perfluoroalkylsulfonic acid is disclosed. Alternatively, a method of preparing a catalyst system which comprises mixing at least one perfluoroalkylsulfonic acid salt with silica gel to form a gel comprising silica and at least one perfluororalkylsulfonic acid salt, and contacting the gel with an acidic solution to convert at least a portion of the at least one perfluororalkylsulfonic acid salt to at least one perfluororalkylsulfonic acid is disclosed.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: May 7, 2002
    Assignee: Phillips Petroleum Company
    Inventors: G. J. Greenwood, Bruce B. Randolph
  • Patent number: 6376731
    Abstract: A process is provided for the production of a gasoline blending fraction rich in isooctane by the dimerization of isobutylene using tertiary butyl alcohol modifier and lower alkane diluent; advantageously the isobutylene is derived from the dehydration of tertiary butyl alcohol.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: April 23, 2002
    Assignee: Arco Chemical Technology, l.p.
    Inventors: Thomas I. Evans, Lawrence J. Karas, Ramesh Rameswaran
  • Publication number: 20020045786
    Abstract: The invention relates to a process for preparing diisobutylene (DIB) from an i-butene-containing C4 raffinate I, in which the C4 stream is passed through a first hydroisomerization reactor (A) and a fractionation column (B) and is thus largely freed of 1-butene and 2-butene. It is subsequently dimerized over an acidic catalyst installed in a reactive column (E). The feed stream to this reactive column contains not only i-butene but also butanes which make the reaction temperature in the fixed bed controllable by removal of the heat of reaction. In the fractionation column (B), a side stream can be subjected to a further hydroisomerization in a reactor (C).
    Type: Application
    Filed: August 16, 2001
    Publication date: April 18, 2002
    Inventors: Alexander Gammersbach, Axel Gohrt, Joachim Grub, Stefan Kaminsky, Hans-Joachim Kramer
  • Patent number: 6348635
    Abstract: A process for starting up a reaction for the polymerization of an olefin in the gas phase carried out using a catalyst based on chromium oxide in a fluidized bed reactor through which moves a reaction gas mixture containing the olefin, wherein in the start-up of the reaction, the olefin is introduced into the reactor until the desired production of polymer is reached by means of a two-stage process, during the first stage of which the introduction of the olefin is carried out so as to maintain a constant partial pressure of olefin in the reactor and during the second stage, the introduction of olefin is regulated at a constant flow rate.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: February 19, 2002
    Assignee: BP Chemicals, Limited
    Inventor: Marc Herzog
  • Patent number: 6344594
    Abstract: Ethylene is trimerized to form 1-hexene, at a selectivity of up to about 99 mole percent, by contacting ethylene, at an ethylene pressure of from about 200-1500 psig and at a reaction temperature of from about 0° C. to about 100° C., with a catalyst comprising a tantalum compound (e.g., TaCl5) and a alkylating component comprising a metal hydrocarbyl compound or a metal hydrocarbyl halide compound (e.g., Sn(CH3)4).
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: February 5, 2002
    Assignee: The Penn State Research Foundation
    Inventors: Ayusman Sen, Shahid Murtuza, Seth B. Harkins, Cecily Andes
  • Patent number: 6337428
    Abstract: A process for the catalytic conversion of hydrocarbons, in particular for the oligomerization of olefins wherein the catalyst comprises a zeolite which is at least partially in its acid form. The zeolite is a NU-86 zeolite comprising silicon and at least one element T selected from the group formed by aluminum, iron, gallium and boron, preferably aluminum, characterized in that element T has been extracted from the framework, and in that it has a global Si/T atomic ratio of more than about 20. Element T is extracted from the zeolitic framework (or network) by means of at least one heat treatment, optionally carried out in the presence of steam, followed by at least one acid attack using at least one solution of a mineral or organic acid, or by direct acid attack.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: January 8, 2002
    Assignee: Institut Francais du Petrole
    Inventors: Eric Benazzi, Nicolas Chouteau, Hervé Cauffriez
  • Publication number: 20020002316
    Abstract: A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by means of selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out in a tubular reactor using a feeding containing isobutene in quantities of less than 20% by weight and with a molar ratio linear olefins/isobutene greater than 3, preferably operating at a reaction temperature ranging from 30 to 120° C., at a pressure of less than 5 MPa and at feeding space velocities of less than 60 h−1.
    Type: Application
    Filed: January 18, 2001
    Publication date: January 3, 2002
    Applicant: Snamprogetti S.p.A.
    Inventors: Marco Di Girolamo, Mario Marchionna, Lorenzo Tagliabue
  • Publication number: 20010051758
    Abstract: The present invention relates to a process for dimerizing lower olefins characterized by the use of a catalyst comprising the following three components: (1) at least one salt or complex of a transition metal belonging to the platinum group of the periodic table, (2) at least one organoaluminum compound and (3) at least one inorganic metallic compound.
    Type: Application
    Filed: October 8, 1998
    Publication date: December 13, 2001
    Inventors: YUKITOSHI FUKUDA, KEIICHI HASHIMOTO, SHOSHIRO MATSUSHITA
  • Patent number: 6329561
    Abstract: The method of producing high purity isooctane useful as a gasoline blending component from diisobutylene or isooctane contaminated with minor amounts of oxygenated impurities which comprises converting the impurities at conditions of elevated temperature and pressure to hydrocarbon and water and recovering the purified diisobutylene or isooctane stream.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: December 11, 2001
    Assignee: Equistar Chemicals, LP
    Inventors: Kenneth M. Webber, Mark P. Kaminsky, Andrew P. Kahn
  • Publication number: 20010044563
    Abstract: A catalyst comprising at least one alkali metal and at least one metallic or semimetallic promoter selected from the group consisting of Ca, Sr, Ba, Ag, Au, Zn, Cd, Hg, In, Tl, Sn, As, Sb and Bi, on a support which may be doped with one or more compounds of an alkali metal and/or alkaline earth metal, where the alkali metal/support ratio by weight is from 0.01 to 5, the promoter/alkali metal ratio by weight is from 0.0001 to 5 and, when a dopant is present, the dopant/support ratio by weight is from 0.01 to 5.
    Type: Application
    Filed: June 20, 2001
    Publication date: November 22, 2001
    Inventors: Ulrich Steinbrenner, Eugen Gehrer
  • Publication number: 20010037947
    Abstract: Methods of forming low molecular weight oligomers of aniline-based compounds are provided as well as methods of forming varied molecular weight oligomers and polymers that are aniline-based which are end-functionalized and capable of being reacted with other monomeric species to form a variety of copolymers. The oligomers, end-functionalized oligomers and copolymers exhibit corrosion-resistant properties and provide corrosion-resistant compounds for use on various substrates.
    Type: Application
    Filed: January 5, 2001
    Publication date: November 8, 2001
    Inventors: Yen Wei, Chuncai Yang, Tianzhong Ding, Xinru Jia, Danliang Jin, Jui-Ming Yeh, Jianguo Wang
  • Patent number: 6291733
    Abstract: A method of dimerizing alpha-olefins to mostly linear internal olefin dimers using as a catalyst a transition metal complex with an activating co-catalyst.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: September 18, 2001
    Assignee: Chevron Chemical Company LLC
    Inventors: Brooke L. Small, Eduardo J. Baralt, A. J. Marcucci