Hydrocarbon Is Contaminant In Desired Hydrocarbon Patents (Class 585/258)
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Patent number: 6586647Abstract: A process for selectively hydrogenating C4-acetylenes in a liquid hydrocarbon stream containing largely butadiene has been developed. Hydrogen and the hydrocarbon stream are contacted with a catalytic composite comprising an inorganic oxide support having dispersed thereon finely divided copper metal and an activator metal of nickel, cobalt, platinum, palladium, manganese, or a combination thereof where 1) the catalytic composite has an average diameter of up to about {fraction (1/32)} inch (800 microns) and/or 2) at least 50 and preferably 70 weight percent of the copper metal and the activator metal are dispersed on the outer 200 micron layer of the support.Type: GrantFiled: May 22, 2002Date of Patent: July 1, 2003Assignee: UOP LLCInventors: Hayim Abrevaya, Deng Yang Jan, Karl Z. Steigleder
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Publication number: 20030069458Abstract: Alkynes, dienes, alkenynes and/or polyenes in an olefin-containing hydrocarbon stream are selectively hydrogenated catalytically in the gas phase in at least two reaction zones connected in series without introduction of part of this hydrocarbon stream between the penultimate reaction zone and the last reaction zone, wherein the hydrogen content in the reaction gas mixture upstream of the penultimate reaction zone and the degree of conversion in the penultimate reaction zone are set so that the reaction gas mixture contains at least 0.7% by volume of hydrogen at the outlet of the penultimate reaction zone.Type: ApplicationFiled: October 3, 2002Publication date: April 10, 2003Inventors: Thomas Hill, Mathias Haake, Ekkehard Schwab, Andrea Frenzel, Helmut Worz
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Publication number: 20030023121Abstract: A catalyst for the selective hydrogenation of alkynes and dienes in C2-C5+-olefin mixtures is described.Type: ApplicationFiled: June 5, 2002Publication date: January 30, 2003Inventors: Andrea Frenzel, Michael Hesse, Andreas Ansmann, Ekkehard Schwab
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Patent number: 6512151Abstract: A selective acetylene hydrogenation process which is able to produce a high quality diolefin having extremely low levels of acetylene over an extended period of time compared with the prior art. The process of the present invention provides a selective hydrogenation reaction zone wherein the catalyst activity is maintained at a high level while the process unit remains on stream by contacting the selective hydrogenation catalyst with a polymer solvent, diolefin feed and hydrogen in one embodiment and by contacting the selective hydrogenation catalyst off-line with only polymer solvent and hydrogen in a second embodiment. In addition, the quantity of make-up regeneration solvent is significantly reduced.Type: GrantFiled: April 18, 2001Date of Patent: January 28, 2003Assignee: UOP LLCInventor: Steven P. Lankton
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Publication number: 20020198430Abstract: Process for the high-yield recovery of ethylene and heavier hydrocarbons from the gas produced by pyrolysis of hydrocarbons (1) in which the liquid products (12-15, 23) resulting from the fractionated condensation of the cracking gas (1) for the recovery of almost all the ethylene, are supplied to a distillation column (C1), called the de-ethanizer, at different intermediate levels, at the top of which the vapor (31) of the column distillate is treated directly in an acetylene hydrogenation reactor (R1), the effluent containing virtually no acetylene being separated by a distillation column (C2) called the de-methanizer, into an ethylene- and ethane-enriched tail product (43), while the head product (44) is recycled by compression or treated for subsequent recovery of ethylene.Type: ApplicationFiled: December 4, 2001Publication date: December 26, 2002Applicant: Technip-CoflexipInventors: Victor Kaiser, Jean-Paul Laugier, Yvon Simon
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Publication number: 20020177746Abstract: A selective acetylene hydrogenation process which is able to produce a high quality diolefin having extremely low levels of acetylene over an extended period of time compared with the prior art. The process of the present invention provides a selective hydrogenation reaction zone wherein the catalyst activity is maintained at a high level while the process unit remains on stream by contacting the selective hydrogenation catalyst with a polymer solvent, diolefin feed and hydrogen in one embodiment and by contacting the selective hydrogenation catalyst off-line with only polymer solvent and hydrogen in a second embodiment. In addition, the quantity of make-up regeneration solvent is significantly reduced.Type: ApplicationFiled: April 18, 2001Publication date: November 28, 2002Inventor: Steven P. Lankton
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Patent number: 6486369Abstract: A process for selective hydrogenation of a C2 and C3 olefinic feed stream containing acetylenic and diolefinic impurities whereby the acetylenes and diolefins impurities are selectively hydrogenated concurrently in a vapor phase process without first separating the C2 and C3 olefinic gases into separate feed stream.Type: GrantFiled: October 18, 2000Date of Patent: November 26, 2002Assignee: Sud-Chemie Inc.Inventors: Richard W. Voight, Steven A. Blankenship
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Patent number: 6476283Abstract: Organic compounds are hydrogenated in the presence of certain bis(pentadienyl) divalent Group IV metal complexes having &pgr;-bound, neutral, conjugated diene ligands. These complexes are effective hydrogenation catalysts for polymers containing ethylenic unsaturation. They further provide for selective hydrogenation of ethylenic unsaturation sites in the presence of aromatic groups.Type: GrantFiled: June 29, 2000Date of Patent: November 5, 2002Assignee: The Dow Chemical CompanyInventors: David D. Devore, James C. Stevens, Stephen F. Hahn, Francis J. Timmers, David R. Wilson
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Patent number: 6455746Abstract: The invention concerns ultrafine polymetallic particles obtained from reducing a mixture of salts dissolved in an organic solvent by an alkali or alkaline earth metal hydride, at a temperature not higher than the solvent reflux temperature, the mixture of dissolved salts comprising at least a salt of a metal having a standard oxidant potential E°Mn+/M at 25° C. higher than −1.18 V. The invention is applicable to the hydrogenation of olefins and the coupling of halogenated aromatic derivatives.Type: GrantFiled: March 21, 2000Date of Patent: September 24, 2002Assignee: Centre National de la Recherche ScientifiqueInventors: Jean-Marie Dubois, Yves Fort, Olivier Tillement
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Publication number: 20020128528Abstract: A process for treatment of a batch with four carbon atoms that contains diene compounds and a minor portion of acetylene compounds is described. A portion of the fluid that circulates in a distillation zone that is enriched with acetylene compounds is drawn off laterally, preferably in the drainage zone, and a selective hydrogenation stage is carried out in a hydrogenation zone that is outside the distillation zone. The hydrogenation effluent that is produced is recycled in the rectification zone. A C4 fraction that comprises butadiene and that is low in acetylene compounds is recovered at the top, and a C5 fraction that is enriched with oligomers is recovered at the bottom.Type: ApplicationFiled: December 21, 2001Publication date: September 12, 2002Applicant: Institut Francais du PetroleInventors: Mathieu Pinault, Vincent Coupard, Christophe Boyer
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Publication number: 20020112989Abstract: A hydrocarbon hydrogenation process and a catalytic composition having hydrogenation functionality. The catalytic composition includes at least two noble metals supported on an inorganic, porous crystalline phase support material having pores with diameters of at least about 13 Angstrom Units and exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a d-spacing greater than about 18 Å with a relative intensity of 100, and having a benzene sorption capacity greater than about 15 grams benzene per 100 grams of the support material at 50 torr and 25° C. The noble metals are selected from the group consisting of Pd, Pt, Rh and lr and the crystalline material is a metallosilicate or an aluminosilicate.Type: ApplicationFiled: August 16, 2001Publication date: August 22, 2002Inventors: Stuart S. Shih, Yuk-Mui Louie, David A. Pappal, Jean W. Beeckman
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Patent number: 6437206Abstract: Unsaturated compounds in hydrocarbon streams are hydrogenated over a catalyst which, in the unused state, shows reflections which correspond to the following lattice plane spacings in the X-ray diffraction pattern [in 10−10m]: 4.52, 2.85, 2.73, 2.44, 2.31, 2.26, 2.02, 1.91, 1.80, 1.54, 1.51, 1.49, 1.45 and 1.39 and have specific relative intensities.Type: GrantFiled: August 30, 1999Date of Patent: August 20, 2002Assignee: BASF AktiengesellschaftInventors: Gerald Meyer, Ekkehard Schwab, Michael Hesse, Peter Trübenbach, Hans-Joachim Müller
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Patent number: 6417419Abstract: A process for selectively hydrogenating C4-acetylenes in a liquid hydrocarbon stream containing largely butadiene has been developed. Hydrogen and the hydrocarbon stream are contacted with a catalytic composite comprising an inorganic oxide support having dispersed thereon finely divided copper metal and an activator metal of nickel, cobalt, platinum, palladium, manganese, or a combination thereof where 1) the catalytic composite has an average diameter of up to about {fraction (1/32)} inch (800 microns) and/or 2) at least 70 weight percent of the copper metal and the activator metal are dispersed on the outer 200 micron layer of the support.Type: GrantFiled: February 16, 2001Date of Patent: July 9, 2002Assignee: UOP LLCInventors: Hayim Abrevaya, Deng Yang Jan, Karl Z. Steigleder
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Patent number: 6407300Abstract: An apparatus and process for treating a complex mixture of hydrocarbons containing undesirable olefinic compounds to remove the mono olefins and diolefins in two stages and separate a desirable key component from the mixture, by first treating the key component in a reactive distillation column under mild conditions to hydrogenate diolefins then separating the diolefin-depleted key component and any lighter materials from the heavier components and sending the diolefin-depleted key component and lighter materials to a second reactive distillation column where the lights are removed overhead and the diolefin-depleted key component is hydrogenated under more severe conditions to remove the mono olefins.Type: GrantFiled: April 11, 2001Date of Patent: June 18, 2002Assignee: Catalytic Distillation TechnologiesInventor: Mario J. Maraschino
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Patent number: 6388150Abstract: A process of selectively hydrogenating an impurity in a feed containing hydrocarbons, such as, for example, an impurity selected from the group consisting of acetylene compounds, dienes, and mixtures thereof in a feed containing at least one monoolefin and the impurity wherein the impurity is hydrogenated selectively in the presence of a selective hydrogenation catalyst supported on a particulate support. The supported catalyst is supported on a mesh-like structure.Type: GrantFiled: January 14, 2000Date of Patent: May 14, 2002Assignee: ABB Lummus Global Inc.Inventors: Rudolf A. Overbeek, Robert E. Trubac, Chiung Yuan Huang, Marino Rota, Nelleke van der Puil
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Publication number: 20020022754Abstract: Hydrogenation of a liquid cut containing hydrocarbons, in particular unsaturated molecules containing at least two double bonds or at least one triple bond, is described wherein the unsaturated molecules are at hydrogenated to less unsaturated molecules containing at least one double bond, in at least one reactor comprising at least two distinct beds of at least one hydrogenation catalyst, and wherein a gas phase containing hydrogen is introduced, a portion thereof being mixed with said cut upstream of the first catalyst bed and a portion thereof being introduced upstream of the subsequent beds contained in said reactor.Type: ApplicationFiled: June 28, 2001Publication date: February 21, 2002Applicant: Institut Francais du PetroleInventors: Christophe Boyer, Vincent Coupard, Quentin Debuisschert
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Publication number: 20020004621Abstract: The present invention provides an improved selective hydrogenation process for removing C10-C16 diolefins in the product from dehydrogenation of C10-C16 paraffins to mono-olefins, which process includes bringing the mixture stream of paraffins and olefins containing C10-C16 mono-olefins and C10-C16 diolefins into contact with a specific hydrogenation catalyst in a plurality of hydrogenation reactors connected in series under the reaction conditions for hydrogenation. Hydrogen is injected into each reactor respectively. To convert the diolefins in the mixture stream of paraffins and olefins into mono-olefins, &ggr;-alumina having a specific surface area of 50-300 m2/g and a pore volume of 0.2-2.0 cm3/g is used as the supporter of the hydrogenation catalyst, palladium is supported on the supporter as the main catalyst element and an element selected from silver, gold, tin, lead or potassium is supported on the supporter as the promoter.Type: ApplicationFiled: April 19, 2001Publication date: January 10, 2002Inventors: Yi Xu, Peicheng Wu, Yu Wang, Dong Liu, Zhengguo Ling, Xiaolei Huang
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Patent number: 6329561Abstract: 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: GrantFiled: September 27, 2000Date of Patent: December 11, 2001Assignee: Equistar Chemicals, LPInventors: Kenneth M. Webber, Mark P. Kaminsky, Andrew P. Kahn
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Publication number: 20010031902Abstract: The process of the invention is a process for selective hydrogenation of a hydrocarbon feed containing hydrogen and C2+ hydrocarbons, characterized in that it comprises at least one step for separating a fraction of the hydrogen contained in the feed by means of a membrane (step a)) and a step for selective hydrogenation of the effluent from step a) in a reactive column (step b)).Type: ApplicationFiled: March 8, 2001Publication date: October 18, 2001Inventors: Christophe Chau, Michel Derrien, Alain Methivier
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Patent number: 6284128Abstract: A process combination is disclosed to selectively upgrade hydrocarbons in a manner to essentially eliminate olefins in product from the combination. Preferably the hydrocarbons comprise naphtha which is reformed to upgrade its octane number and/or to produce aromatic intermediates, followed by hydrogenation of olefins in the reformate. Olefin saturation optimally is effected by catalytic reaction on an olefin-containing reformate taken at an intermediate point from the effluent side of the reforming-process feed-effluent heat exchanger. Saturation is performed in a defined temperature range which results in selective hydrogenation.Type: GrantFiled: September 2, 1999Date of Patent: September 4, 2001Assignee: UOP LLCInventors: Bryan K. Glover, Aronson L. Huebner
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Publication number: 20010016672Abstract: An apparatus and process for treating a complex mixture of hydrocarbons containing undesirable olefinic compounds to remove the mono olefins and diolefins in two stages and separate a desirable key component from the mixture, by first treating the key component in a reactive distillation column under mild conditions to hydrogenate diolefins then separating the diolefin-depleted key component and any lighter materials from the heavier components and sending the diolefin-depleted key component and lighter materials to a second reactive distillation column where the lights are removed overhead and the diolefin-depleted key component is hydrogenated under more severe conditions to remove the mono olefins.Type: ApplicationFiled: April 11, 2001Publication date: August 23, 2001Applicant: CATALYTIC DISTILLATION TECHNOLOGIESInventor: Mario J. Maraschino
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Patent number: 6278033Abstract: A catalyst which contains, in its active composition, from 0.05 to 1.0% by weight of at least one metal or compound of a metal of the 10th group of the Periodic Table of the Elements and from 0.05 to 1.0% by weight of at least one metal or compound of a metal of the 11th group of the Periodic Table of the Elements, with the weight ratio of the metal of the 11th group to the metal of the 10th group being from 0.95 to 1.05, and, as support, an SiO2 -containing catalyst support having a BET surface area of from 2 to 400 m2/g, wherein at least 20% of the total pore volume of the catalyst is made up by pores having a diameter greater than 100 nanometers, can be used in processes for removing alkynes, dienes and/or monounsaturated hydrocarbons from streams of materials.Type: GrantFiled: November 30, 2000Date of Patent: August 21, 2001Assignee: BASF AktiengesellschaftInventors: Klemens Flick, Ruprecht Meissner, Werner Hefner, Rainer Feser, Fabian Kunz
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Patent number: 6271428Abstract: A process for the selective hydrogenation of trace quantities of acetylene compounds contained in a stream of diolefins to achieve extended on-stream performance by simultaneously contacting the selective catalyst with a diolefin feed, hydrogen and a polymer solvent.Type: GrantFiled: July 22, 1999Date of Patent: August 7, 2001Assignee: UOP LLCInventor: Paul R. Cottrell
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Patent number: 6239322Abstract: A particulate selective hydrogenation catalyst for hydrogenating unsaturated diolefinic hydrocarbons to &agr;-olefinic hydrocarbons at rates which are at least 1.5 times higher than the rate of hydrogenation of &agr;-olefinic hydrocarbons to saturated compounds contains palladium distributed at the periphery of particles (spherules or extrudates), and at least one element selected from tin and lead. Further, the tin and/or lead is advantageously distributed at the periphery of the spherules or extrudates.Type: GrantFiled: September 17, 1999Date of Patent: May 29, 2001Assignee: Institut Francais du PetroleInventors: Blaise Didillon, Charles Cameron, Christophe Gautreau
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Patent number: 6225515Abstract: A process for the selective hydrogenation of trace quantities of acetylene compounds contained in a stream of diolefins to achieve extended on-stream performance by contacting an off-line selective hydrogenation reaction zone containing selective catalyst with hydrogen and a polymer solvent.Type: GrantFiled: July 22, 1999Date of Patent: May 1, 2001Assignee: UOP LLCInventor: Paul R. Cottrell
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Patent number: 6218589Abstract: A method for improving the operation of a propane-propylene splitter in a process for the dehydrogenation of propane wherein the propane is dehydrogenated to produce a stream containing propylene and trace quantities of methyl acetylene and propadiene compounds and which stream is selectively hydrogenated to selectively saturate at least a majority of the trace quantities of methyl acetylene and propadiene compounds. The resulting effluent from the selective hydrogenation zone is fractionated in a propane-propylene splitter to produce a high-purity propylene product stream, an unconverted propane stream which is introduced to the dehydrogenation zone and a small slip stream or side-cut containing methyl acetylene and propadiene compounds which is introduced into the selective hydrogenation zone.Type: GrantFiled: January 14, 2000Date of Patent: April 17, 2001Assignee: UOP LLCInventor: Paul R. Cottrell
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Patent number: 6005156Abstract: In a process for the separation of p-xylene from a feed to be treated containing a mixture of xylenes and olefinic impurities, at least a portion of the feed is circulated in an enrichment zone (14) to enrich a first fraction (15) in p-xylene and provide a second fraction (18) which is depleted in p-xylene. The second fraction is circulated in an isomerisation zone (19) and an isomerate (20) is recovered which is recycled to the enrichment zone. At least a portion of the feed to be treated, the isomerate, or a mixture thereof is circulated in at least one selective hydrogenation zone (3) to partially remove the olefinic impurities and thereafter in at least one clay tretment zone (8) to remove additional olefinic impurities. An effluent is recovered which is sent to the enrichment zone.Type: GrantFiled: January 27, 1998Date of Patent: December 21, 1999Assignee: Institut Francais du PetroleInventors: Jean Fran.cedilla.ois Joly, Charles Cameron, Pierre Renard, Fran.cedilla.oise Montecot, Jean Cosyns, Gerard Leger
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Patent number: 6002058Abstract: A process for the alkylation of benzene contained in a mixed refinery stream is disclosed wherein the refinery stream is first subjected to hydrogenation of higher olefins prior to alkylation of the benzene with selected types and quantities of lower olefins. Streams containing sulfur compounds may be pretreated by hydrodesulfurization. All of the process steps are advantageously carried out in distillation column reactors to take advantage of that mode of operation.Type: GrantFiled: November 2, 1998Date of Patent: December 14, 1999Assignee: Catalytic Distillation TechnologiesInventors: Dennis Hearn, Robert P. Arganbright, Lawrence A. Smith, Jr., John R. Adams
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Patent number: 5962755Abstract: A process for saturating benzene in a light paraffin isomerization process can accommodate varying quantities of benzene through the incorporation of progressive steps that control temperatures in the isomerization zone while performing a majority of the saturation within an immediately upstream benzene saturation zone. The process is suited for saturating benzene to very low levels while feedstream concentrations of benzenes may vary from 2 to 25 wt % throughout a given period of operation. The process can accommodate rapid swings in benzene concentration that may occur on a daily basis. The invention is particularly suited for the use of a sulfated zirconia catalyst that allows the utilization of existing reactor vessels in an isomerization process.Type: GrantFiled: June 9, 1998Date of Patent: October 5, 1999Assignee: Uop LLCInventors: Paul George Blommel, Christopher David Gosling, Steve A. Wilcher
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Patent number: 5955640Abstract: Integrated process for the production of butene-1 which comprises feeding a C.sub.4 hydrocarbon stream to a separation unit of butene-1 and recycling the remaining stream to the same unit after treatment in a bond isomerization section to convert the remaining butenes-2 into butene-1, a molecular sieve separation unit is inserted in the cycle operating with the hydrocarbons in a vapour phase, for the purge of the paraffins.Type: GrantFiled: May 24, 1996Date of Patent: September 21, 1999Assignees: Enichem S.p.A., Snamprogetti S.p.A.Inventors: Renato Paludetto, Alfredo Orsi, Roberto Trotta, Gianni Donati
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Patent number: 5939596Abstract: The present invention provides a process and system for the removal of butadiene from a cracked gas stream prior to entering a front end hydrogenation reactor in an olefin production facility.Type: GrantFiled: January 12, 1998Date of Patent: August 17, 1999Assignee: Stone & Webster Engineering Corp.Inventor: Mark Whitney
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Patent number: 5905178Abstract: A process for the removal of .alpha.-methyl styrene from admixtures with cumene by hydrogenation in a catalytic distillation hydrogenation to selectively hydrogenate the side chains and produce cumene is disclosed. The crude cumene may be the byproduct of the cumene oxidation to produce phenol. The crude cumene also contains acetone, benzene, ethyl benzene and high and low boiling carbonyls, which are either removed simultaneously with the hydrogenation/distillation or removed first followed by the selective catalytic distillation hydrogenation.Type: GrantFiled: April 20, 1998Date of Patent: May 18, 1999Assignee: Catalytic Distillation TechnologiesInventor: James M. Hildreth
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Patent number: 5894076Abstract: A process for the alkylation of benzene contained in a mixed refinery stream is disclosed wherein the refinery stream is first subjected to hydrogenation of higher olefins prior to alkylation of the benzene with selected types and quantities of lower olefins. Streams containing sulfur compounds may be pretreated by hydrodesulfurization. All of the process steps are advantageously carried out in distillation column reactors to take advantage of that mode of operation.Type: GrantFiled: May 12, 1997Date of Patent: April 13, 1999Assignee: Catalytic Distillation TechnologiesInventors: Dennis Hearn, Robert P. Arganbright, Lawrence A. Smith, Jr., John R. Adams
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Patent number: 5851383Abstract: A light hydrocarbon stream, such as a C.sub.3 -C.sub.5 stream recovered from an FCC unit, is catalytically treated for the selective hydrogenation of dienes and for the removal of mercaptans by thioetherification. The effluent of the reaction zone is fractionated to remove light ends and thioethers in a dual section fractionation zone, with the interconnection of the sections facilitating a reduction in capital and operating costs.Type: GrantFiled: December 15, 1997Date of Patent: December 22, 1998Assignee: UOP LLCInventor: Stanley J. Frey
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Patent number: 5821397Abstract: A process is described for the high-efficiency selective hydrogenation of an aromatic hydrocarbon cut which also contains monoolefinic hydrocarbons and polyolefinic and/or acetylenic hydrocarbons with a bromine number of 10000 to 100 mg per 100 g of product with an aromatic degree of conversion which is limited to a maximum of 0.15% by weight, the process being characterized in that the cut, which is at least partially in the liquid phase, is passed with hydrogen into a hydrogenation zone in contact with a catalyst containing 0.1% to 1% by weight (with respect to the support) of palladium, the catalyst having been treated before activation with at least one organic sulphur-containing compound to introduce 0.05% to 1% of sulphur (by weight with respect to the weight of the catalyst), the process being carried out at a temperature in the range 20.degree. C. to 25.degree. C., at a pressure of 4-50 bar, a GHSV of 0.2-25 h.sup.-1 and with a H.sub.2 /monoolefin +polyolefin and/or acetylenes ratio in the range 0.Type: GrantFiled: January 29, 1996Date of Patent: October 13, 1998Assignee: Institut Francais du PetroleInventors: Jean-Fran.cedilla.ois Joly, Charles Cameron, Jean Cosyns, Gerard Leger, Pierre Renard, Fran.cedilla.oise Montecot
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Patent number: 5763714Abstract: A mixed aromatic stream is hydrotreated to remove olefins and fractionated to separate C.sub.9 + heavies in a distillation column reactor and the C.sub.8 and lighter material is fed to a selective adsorption unit where the para-xylene is removed. The para-xylene depleted raffinate therefrom may be subjected to isomerization to form additional para-xylene. The effluent from the isomerization can be fed to the distillation column reactor for hydrogenation of any olefins formed during the isomerization or directly to the adsorption unit.Type: GrantFiled: January 8, 1997Date of Patent: June 9, 1998Assignee: Catalytic Distillation TechnologiesInventors: Thomas P. Hickey, Dennis Hearn, Hugh M. Putman
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Patent number: 5759386Abstract: A light hydrocarbon stream, such as a C.sub.3 -C.sub.5 stream recovered from an FCC unit, is catalytically treated for the selective hydrogenation of dienes and for the removal of mercaptans by thioetherification. The effluent of the reaction zone is fractionated to remove light ends and thioethers in a dual section fractionation zone, with the interconnection of the sections facilitating a reduction in capital and operating costs.Type: GrantFiled: January 9, 1997Date of Patent: June 2, 1998Assignee: UOPInventor: Stanley J. Frey
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Patent number: 5698752Abstract: A selective hydrogenation of an alkyne in an olefin-containing fluid is provided which comprises contacting the fluid and hydrogen gas with a catalyst in the presence of at least one sulfur compound, under reaction conditions effective to produce at least one alkene wherein the catalyst comprises at least one alkali metal, fluorine and an inorganic support material.Type: GrantFiled: July 23, 1996Date of Patent: December 16, 1997Assignee: Phillips Petroleum CompanyInventors: Scott H. Brown, James B. Kimble, Stan A. Zisman
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Patent number: 5658453Abstract: A process combination is disclosed to selectively upgrade naphtha in a manner to obtain an aromatics-rich, low-olefin product from the combination. Preferably the naphtha is subjected to aromatization to obtain an aromatics concentrate which is upgraded by hydrogenation of olefins in the aromatics-rich stream. Olefin saturation is effected following separation of the major portion of hydrogen from the aromatics concentrate and before fractionation/stabilization for removal of light ends, with concomitant low saturation of aromatics and with removal of light ends in a fractionator which would be associated with the aromatization in any case.Type: GrantFiled: May 30, 1995Date of Patent: August 19, 1997Assignee: UOPInventors: Michael B. Russ, Aaron P. Kelly, John Y. G. Park
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Patent number: 5583274Abstract: C.sub.2 -C.sub.6 alkynes (preferably acetylene) contained in feeds which also contain sulfur impurities are hydrogenated to the corresponding alkenes in the presence of a supported palladium catalyst which has been promoted with alkali metal fluoride (preferably potassium fluoride).Type: GrantFiled: January 20, 1995Date of Patent: December 10, 1996Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5534658Abstract: The invention concerns a process for reducing the benzene content of petrol fractions and isomerizing paraffins in the presence of an isomerization catalyst comprising 4 to 15% of at least one halogen and at least one metal from group VIII deposited on a support composed of a mixture of specific proportions of eta alumina and gamma alumina, in which isomerization is carried out on a mixture of a) a feed with the following composition by weight: 40% to 80% of paraffins, 0.5% to 7% of cyclic hydrocarbons and 6% to 45% of aromatics, and with a maximum distillation temperature of between 70.degree. C. and 90.degree. C., b) a C.sub.5 -C.sub.6 cut which is generally a straight run cut, and c) a chlorine-containing compound providing a concentration of 50-5000 ppm of chlorine in the mixture.Type: GrantFiled: June 7, 1995Date of Patent: July 9, 1996Assignee: Institut Francais du PetroleInventors: Christine Travers, Philippe Courty, Patrick Sarrazin
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Patent number: 5475173Abstract: A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C.sub.4 -C.sub.10 diolefins (preferably 1,3-butadiene) with hydrogen gas to the corresponding monoolefins.Type: GrantFiled: July 19, 1994Date of Patent: December 12, 1995Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5364998Abstract: A process for the selective hydrogenation of unsaturated hydrocarbons is characterized in that the catalyst contains a group VIII metal and an element chosen from within the group constituted by gallium and indium.Type: GrantFiled: April 2, 1993Date of Patent: November 15, 1994Assignee: Institut Francais Du PetroleInventors: Patrick Sarrazin, Jean-Paul Boitiaux
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Patent number: 5105037Abstract: A process is disclosed for preparing synthetic lubricant base stocks having improved properties. Synthetic lubricant base stocks may be prepared in good yield by oligomerizing linear olefins using certain acidic calcium montmorillonite clay catalysts. When a mixture of propylene and long-chain alpha-olefin is used, in which up to about 20 wt. % of the mixture comprises propylene, and the co-oligomers prepared therefrom are hydrogenated, a synthetic lubricant base stock having a lower pour point and a higher viscosity index is prepared.Type: GrantFiled: May 14, 1990Date of Patent: April 14, 1992Assignee: Texaco Chemical CompanyInventors: John R. Sanderson, Edward T. Marquis
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Patent number: 5015794Abstract: Removal of the small amount of lower molecular weight olefins produced by certain isomerization catalysts during the catalytic isomerization of xylene results in reduced xylene loss. Such removal can be conveniently effected by use of a mild hydrogenation catalyst separate from the isomerization catalyst in the process.Type: GrantFiled: September 21, 1989Date of Patent: May 14, 1991Assignee: Amoco CorporationInventor: Mark G. Reichmann
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Patent number: 5004851Abstract: Nitration Grade benzene is made from a benzene stream with impurities including olefins by first fractionally distilling the benzene to a purity of at least 99 mole percent and subsequently passing the stream in a liquid phase in the presence of hydrogen through a hydrogenation step with a palladium catalyst under conditions such that substantially all olefins remaining in the stream are hydrogenated to paraffins.Type: GrantFiled: November 22, 1988Date of Patent: April 2, 1991Assignee: The Dow Chemical CompanyInventors: George R. Durham, Randy S. Hebert
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Patent number: 5003118Abstract: The benzene content in a gasoline pool is reduced by a process that hydrogenates a benzene-containing isomerization zone feedstream. In addition to reducing the benzene concentration, the hydrogenation zone is also used to heat the isomerization zone feed and thereby eliminate the need for an isomerization zone heater. The process employs mild saturation conditions which eliminates hydrocracking and prevents the loss of isoparaffin yield. Additional cyclic hydrocarbons produced by the saturation of benzene can be processed in the isomerization zone for ring opening to increase the available paraffinic feedstock or the isomerization zone can be operated to pass the cyclic hydrocarbons through to a product recovery section.Type: GrantFiled: December 29, 1989Date of Patent: March 26, 1991Assignee: UOPInventors: Chi-Chu D. Low, Visnja A. Gembicki, Robert S. Haizmann
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Patent number: 4952746Abstract: A process for the removal of hydrogenatable hydrocarbonaceous compounds comprising a component selected from the group consisting of halogen, metal, sulfur, oxygen and nitrogen from a hydrocarbonaceous stream which comprises the steps of: (a) contacting the hydrocarbonaceous stream with an adsorbent to remove at least a portion of the hydrogenatable hydrocarbonaceous compounds from the hydrocarbonaceous stream to provide a hydrocarbonaceous stream having a reduced concentration of hydrogenatable hydrocarbonaceous compounds; (b) contacting spent adsorbent with an elution solvent to remove the hydrogenatable hydrocarbonaceous compounds from the spent adsorbent thereby regenerating the adsorbent; (c) contacting the elution solvent in admixture with the hydrogenatable hydrocarbonaceous compounds in the presence of hydrogen with a hydrogenation catalyst; (d) contacting the effluent with an aqueous scrubbing solution; (e) introducing a resulting admixture of the reaction zone effluent and the aqueous scrubbing soluType: GrantFiled: January 15, 1988Date of Patent: August 28, 1990Assignee: UOPInventors: Russell W. Johnson, Lee Hilfman
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Patent number: 4735703Abstract: Concentrations of straight chain material are material are increased by treating a thermal-cracked oil distillate boiling in the range of 120.degree. to 290.degree. C. and containing aliphatic olefins, at a temperature of 0.degree. to 330.degree. C. in liquid phase in the presence of an acid catalyst, said thermal-cracked oil distillate being obtained from a thermal cracking process of thermally cracking a petrolic heavy residual oil at a temperature not lower than 400.degree. C. and not exceeding 700.degree. C.; and then separating and removing from the reaction mixture heavy components boiling higher than said distillate.Type: GrantFiled: May 8, 1985Date of Patent: April 5, 1988Assignee: Nippon Petrochemicals Company, LimitedInventors: Atsushi Sato, Yoshikazu Murai, Tatsuo Yamaguchi, Kanji Mochizuki, Kunio Sugisawa
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Patent number: 4704492Abstract: In a process wherein the vinyl acetylenes present as an impurity in a stream of butadienes are removed by hydrogenating the stream over a catalyst the loss of butadiene is lessened and catalyst aging is diminished by injecting the hydrogen in reduced quantities into a series of smaller catalyst beds connected in series.Type: GrantFiled: December 24, 1986Date of Patent: November 3, 1987Assignee: Mobil Oil CorporationInventor: Margaret Nemet-Mavrodin