Using Catalyst Or Support Of Defined Structure, Surface Area, Or Pore Size Patents (Class 585/260)
-
Patent number: 7297824Abstract: Improved Ni catalysts for hydrogenation reactions are disclosed. The catalysts are useful for hydrogenation such as selective hydrogenation of acetylenic impurities in crude olefin and diolefin streams. The catalysts are prepared by depositing nickel on a porous support which has the following specific physical properties; BET surface area of from 30 to about 100 m2/g, total nitrogen pore volume of from 0.4 to about 0.9 cc/g, and an average pore diameter of from about 110 to 450 ? with or without modifiers of one or more elements selected from the group consisting of Cu, Re, Pd, Zn, Mg, Mo, Ca and Bi.Type: GrantFiled: June 30, 2005Date of Patent: November 20, 2007Assignee: Catalytic Distillation TehnologiesInventors: J. Yong Ryu, Hugh M. Putman
-
Patent number: 7250544Abstract: A process for selective hydrogenation of polyunsaturated compounds that are contained in a hydrocarbon feedstock in the presence of a catalytic reactor with a hydrogen-selective membrane comprises a) the introduction of said feedstock co-mixed with a first amount hydrogen into a reaction zone of said reactor, b) the contact of a second amount hydrogen with the upstream face of the membrane, which is inorganic and porous, then c) the catalytic reaction of the feedstock with hydrogen that has selectively traversed the membrane.Type: GrantFiled: February 2, 2004Date of Patent: July 31, 2007Assignee: Institut Francais du PetroleInventors: Christophe Chau, Denis Uzio
-
Patent number: 7208646Abstract: A process for the selective hydrogenation of dienes in mixed streams of olefin containing hydrocarbons, such as butadiene in a mixed C4 stream with minimum loss of monoolefins is disclosed wherein the reactor is operated at conditions which induce pulse flow. The pulse flow is induced in a downflow boiling point reactor by vaporization of a portion of the liquid feed at proper conditions.Type: GrantFiled: August 25, 2004Date of Patent: April 24, 2007Assignee: Catalytic Distillation TechnologiesInventor: Christopher C. Boyer
-
Patent number: 7109388Abstract: The invention relates to catalyst packing and a production process for catalyst packing in which a fabricated woven or knitted fabric in the form of continuous web goods is shaped to give a package by stacking a plurality of layers, and segments (S) are cut out of the package and assembled to give one or more course(s) which completely fill the reactor cross section. A reactor containing catalyst packing of this type is particularly suitable for catalytic reactions, preferably for hydrogenations, selective hydrogenations, selective oxidations or isomerizations.Type: GrantFiled: February 7, 2001Date of Patent: September 19, 2006Assignee: BASF AktiengesellschaftInventors: Franz Josef Bröcker, Heinrich Laib, Gerd Rohrbacher, Ekkehard Schwab, Helmut Jansen
-
Patent number: 7090766Abstract: A process wherein all of the unsaturates within a cracked naphtha stream are substantially hydrogenated to alkanes and the olefin depleted stream is then subjected to hydrodesulfurization to achieve the desired sulfur levels without the formation of recombinant mercaptans.Type: GrantFiled: September 30, 2002Date of Patent: August 15, 2006Inventors: Kenneth H. Johnson, Richard L. Moseley
-
Patent number: 7087155Abstract: A process for cracking an olefin-rich hydrocarbon feedstock which is selective towards light olefins in the effluent, the process comprising contacting a hydrocarbon feedstock containing olefins having a first composition of at least one olefinic component with a crystalline silicate catalyst to produce an effluent having a second composition of at least one olefinic component, the feedstock and the effluent having substantially the same olefin content by weight therein as the feedstock. A process for the cracking of olefins in a hydrocarbon feedstock containing at least one diene and at least one olefin, the process comprising hydrogenating the at least one diene to form at least one olefin in the presence of a transition metal-based hydrogenation catalyst at an inlet temperature of from 40 to 200° C.Type: GrantFiled: December 5, 1998Date of Patent: August 8, 2006Assignee: TOTAL Petrochemicals Research FeluyInventors: Jean-Pierre Dath, Luc Delorme, Jacques-François Grootjans, Xavier Vanhaeren, Walter Vermeiren
-
Patent number: 7078577Abstract: A method for forming dihydroDicyclopentadiene comprises mixing a source of dicyclopentadiene with at least one solvent and at least one reactive component in the presence of a source of hydrogen and a selective hydrogenation catalyst, the solvent and reactive component being readily separable from dihydroDicyclopentadiene, and the reactive component and catalyst favoring the formation of dihydroDicyclopentadiene over tetra hydro dicyclopentadiene.Type: GrantFiled: August 11, 2003Date of Patent: July 18, 2006Assignee: Equistar Chemicals, LPInventor: Kenneth M. Webber
-
Patent number: 7070690Abstract: The invention relates to a process for conversion of hydrocarbons in the presence of at least one catalyst with controlled acidity, characterized in that the level of activity of said catalyst in isomerization of the cyclohexane is less than 0.10 and/or in that the ratio of toluene hydrogenation activity to the cyclohexane isomerization activity is greater than 10.Type: GrantFiled: February 24, 2003Date of Patent: July 4, 2006Assignee: Institut Francais du PetroleInventors: Virginie Harle, Stéphane Kressmann, Isabelle Guibard, Slavik Kasztelan, Frédéric Morel
-
Patent number: 7045669Abstract: The charge gas from the thermal cracking of a hydrocarbon feedstock is processed in a front-end catalytic distillation hydrogenation system of an olefins plant to more effectively recover ethylene and propylene product and to process the by-products. The rate of fouling in the system is reduced by employing two columns in the system with the first column operating at a higher pressure and the second column operating at a lower pressure. The hydrogenation as well as fractionation takes place in the first column while the second column is only a fractionator. The temperature of the bottoms from each column is maintained at a temperature less than 200° C. to avoid fouling.Type: GrantFiled: August 5, 2003Date of Patent: May 16, 2006Assignee: Catalytic Distillation TechnologiesInventors: Charles Sumner, Jeffrey L. Heineman, Christopher A. Di Biase
-
Patent number: 7038096Abstract: A process of treating a catalyst composition containing palladium, an inorganic support, and a catalyst component, such as silver and/or a modifier such as alkali metal fluoride, is provided. The process involves contacting a catalyst composition with a first treating agent comprising carbon monoxide under a first treating condition to provide a treated catalyst composition. As an option, such treated catalyst composition can then be contacted with a second treating agent comprising a hydrogen-containing fluid under a second treating condition. The treated catalyst composition can be used in a selective hydrogenation process in which highly unsaturated hydrocarbons such as diolefins and/or alkynes are contacted with such treated catalyst composition in the presence of hydrogen to produce less unsaturated hydrocarbons such as monoolefins.Type: GrantFiled: April 7, 2004Date of Patent: May 2, 2006Assignee: Chevron Phillips Chemical Company LPInventors: Tin-Tack Peter Cheung, Joseph J. Bergmeister, Marvin M. Johnson
-
Patent number: 7025872Abstract: Process for obtaining a hydrocarbon fraction that can be used as a feedstock of an etherification unit and that contains a small amount of diene compounds, nitrogen-containing compounds and sulfur-containing compounds, starting from an initial hydrocarbon feedstock that comprises a mixture of olefins, dienes, and nitrites as well as sulfur-containing compounds, whereby said process comprises at least the following successive stages: a) a selective hydrogenation of said initial hydrocarbon feedstock in the presence of a catalyst of group VIII of the periodic table, b) a fractionation by distillation of the effluents that are obtained from stage a) under conditions that make it possible to obtain at least two fractions including said hydrocarbon fraction and that comprises a small amount of diene compounds, nitrogen-containing compounds and sulfur-containing compounds, and a heavy fraction that contains heavy hydrocarbons and the majority of the nitrogen-containing compounds and sulfur-containing compoundsType: GrantFiled: January 22, 2004Date of Patent: April 11, 2006Assignee: Institut Francais du PetroleInventors: Florent Picard, Alain Forestiere, Julia Magne-Drisch, Nathalie Marchal-George
-
Patent number: 7014750Abstract: Systems and processes for the hydrotreatment of pyrolysis gasoline comprising reactors, monolithic catalyst beds and hydrogen-containing treatment gases that allow for improved efficiency and productivity over conventional trickle bed processes and systems for such hydrotreatment.Type: GrantFiled: August 5, 2004Date of Patent: March 21, 2006Assignee: Corning IncorporatedInventors: Thorsten R. Boger, Shantanu Roy, Charles M. Sorensen, Jr.
-
Patent number: 7009085Abstract: A catalyst composition comprising an inorganic support material, a palladium component, a silver component, and a promoter component having the formula XYFn, wherein X is an alkaline metal, Y is an element selected from the group consisting of antimony, phosphorus, boron, aluminum, gallium, indium, thallium, and arsenic, and n is an integer which makes YFn a monovalent anion. The above-described catalyst is employed as a catalyst in the selective hydrogenation of acetylene. The above-described catalyst is made by incorporating a palladium component, a silver component, and a promoter component into an inorganic support material.Type: GrantFiled: July 1, 2002Date of Patent: March 7, 2006Assignee: Phillips Petroleum CompanyInventor: Tin-Tack Peter Cheung
-
Patent number: 6830678Abstract: The invention relates to a process of producing gasoline with a low sulphur content from a feedstock containing sulphur. This process comprises at least one step a1 of selectively hydrogenating the diolefins and acetylenic compounds, at least one separation of the gasoline (step b) obtained at step a1 into at least three fractions, at least one step c1 of treating the heavy gasoline separated at step b on a catalyst enabling the unsaturated sulphur compounds to be at least partially decomposed or hydrogenated and at least one step d to remove the sulphur and nitrogen from at least one intermediate fraction, followed by catalytic reforming.Type: GrantFiled: March 29, 2001Date of Patent: December 14, 2004Assignee: Institut Francais DuPetroleInventors: Blaise Didillon, Denis Uzio, Quentin Debuisschert, Jean-Luc Nocca
-
Patent number: 6824676Abstract: A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and a heavy boiling range naphtha. The intermediate boiling range naphtha containing thiophene and thiophene boiling range mercaptans is passed on to a polishing hydrodesulfurization reactor where a low sulfur, low olefin gas oil is concurrently fed to the polishing reactor to insure that a liquid phase is present.Type: GrantFiled: March 8, 2002Date of Patent: November 30, 2004Assignee: Catalytic Distillation TechnologiesInventors: Gary G. Podrebarac, Willibrord A. Groten, Lawrence A. Smith, Jr.
-
Patent number: 6824674Abstract: A method for increasing the operational life-time of a pyrolysis gasoline hydrotreating process using a supported Group VIII metal catalyst by employing a catalyst having a significantly increased total surface area.Type: GrantFiled: May 30, 2002Date of Patent: November 30, 2004Assignee: Equistar Chemicals, LPInventor: Mark P. Kaminsky
-
Patent number: 6822127Abstract: A selective hydrogenation catalyst for the seletive hydrogenation of unsaturated hydrocarbons, a process for preparing this catalyst and its use. The catalyst of the invention comprises a support, active component Pd, rare earth metals, and auxiliary metal Bi, Ag etc. The catalyst is able to hydrogenate high-unsaturated hydrocarbons such as alkyne with high selectivity at high space velocity while both green oil formation and carbon deposition on the catalyst are very low. It is applicable to an industrial cracking process.Type: GrantFiled: October 1, 2001Date of Patent: November 23, 2004Assignees: China Petroleum & Chemical Corporation, Beijing Research Institute of Chemical Industry, China Petroleum & Chemical CorporationInventors: Wei Dai, Jing Zhu, Hui Peng, Yanlai Guo, Wei Mu, Helong Li, Qingzhou Cui
-
Patent number: 6781023Abstract: Bromine reactive hydrocarbon contaminants are removed from aromatic streams by first providing an aromatic feedstream having a negligible diene level. The feedstream is contacted with an acid active catalyst composition under conditions sufficient to remove mono-olefins. An aromatic stream may be pretreated to remove dienes by contacting the stream with clay, hydrogenation or hydrotreating catalyst under conditions sufficient to substantially remove dienes but not mono-olefins.Type: GrantFiled: June 25, 2001Date of Patent: August 24, 2004Assignee: ExxonMobil Oil CorporationInventors: Stephen H. Brown, Terry E. Helton, Arthur P. Werner
-
Publication number: 20040133052Abstract: A catalyst is described for hydrogenation of unsaturated hydrocarbons, containing catalytically active amounts of Pd and optionally Ag in a support. The catalyst is characterized by the fact that the support represents a shaped body with a trilobal cross section, the lobes being provided with continuous openings. The catalysts can be produced according to a method, in which the support is impregnated with a solution of salts of Pd and optionally Ag. These salts are reduced by means of a reducing agent, whereupon the support so impregnated is washed, dried and calcined and, if reduction is not complete, the still present oxides of Pd and Ag are reduced to the corresponding metals in a hydrogen-containing atmosphere.Type: ApplicationFiled: November 11, 2003Publication date: July 8, 2004Inventors: Mauro Petrolli, Ingrid Geyer, Francesco Casagrande
-
Patent number: 6747181Abstract: The invention relates to a process for the hydrogenation of phenyl acetylene in a styrene-containing medium with the aid of a supported nickel catalyst with a nickel content of 10-25 wt. %. This process is by preference used for the hydrogenation of phenyl acetylene in a styrene-containing medium which contains more that 30 wt. % of styrene.Type: GrantFiled: October 6, 2000Date of Patent: June 8, 2004Assignee: DSM N.V.Inventors: Hubertus J. M. Bosman, Edwin J. Grootendorst, Leonardus H. Postma, Theodorus M. Smeets
-
Patent number: 6734328Abstract: An improved selective hydrogenation process for removing acetylenic impurities such as vinyl acetylene, ethyl acetylene, propyl acetylene and acetylene in a steam cracked crude butadiene stream by selective hydrogenation is carried out in two steps. In the first step, the partial selective hydrogenation is carried out in a fixed bed with a copper-based catalyst to have the ratio of vinyl acetylene to ethyl acetylene in a range of from 0 to about 1, preferably from about 0.01 to 0.6, in the product stream. In the second step, the selective hydrogenation of the remaining C4 acetylenic impurities is carried out to completion in the catalytic distillation mode using a palladium promoted copper catalyst, an improved palladium catalyst or a combination of these two.Type: GrantFiled: November 8, 2002Date of Patent: May 11, 2004Assignee: Catalytic Distillation TechnologiesInventor: J. Yong Ryu
-
Patent number: 6709639Abstract: An apparatus for the purification of catalytic cracking gasolines containing dienic and/or acetylenic impurities, and mercaptans, said apparatus comprising at least one selective hydrogenation reactor 3 containing at least one fixed catalyst bed, and having at least one line 1 for introducing a feed, at least one effluent outlet line, and a line supplying hydrogen to the reactor, said reactor being followed by at least one stabilization drum 4 connected to said effluent outlet line, the drum having at least one gas outlet line 5 and at least one stabilized effluent outlet line, and said effluent passing into at least one sweetening reactor 8 comprising at least one effluent inlet line 6 and at least one effluent outlet line, said reactor having close thereto at least one oxidizing agent supply line, said apparatus also comprising at least one drum 9 for degassing the effluent from the sweetening reactor 8, said drum 9 having at least one gas outlet line and at least one outlet line 11 for dedienized, stabilizType: GrantFiled: March 9, 2000Date of Patent: March 23, 2004Assignee: Institut Francais du PetroleInventors: Thierry Chapus, Blaise Didillon, Christian Marcilly, Charles Cameron
-
Publication number: 20030225305Abstract: A method for stabilizing pyrolysis gasoline by hydrogenating same over a Group VIII metal catalyst wherein the catalyst is promoted against poisoning by at least one metal from Groups I B, VI B, VII B, and zinc. Poisons preferentially bind with the promoters and not with the active catalytic metals.Type: ApplicationFiled: May 30, 2002Publication date: December 4, 2003Inventor: Mark P. Kaminsky
-
Patent number: 6653509Abstract: A catalyst which consists of amorphous carbon with molecular planes that have curved surfaces and contain six-membered and non-six-membered carbon rings, optionally having at least one catalytically active, low-valency metal covalently bound thereto. Methods of producing the catalyst and applications thereof are included.Type: GrantFiled: April 15, 2002Date of Patent: November 25, 2003Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.Inventors: Robert Schlögl, Michael Wohlers, Thilo Belz, Thomas Braun
-
Patent number: 6632414Abstract: Three-phase chemical hydrogenation reactions involving the processing of gas-liquid reactant feed streams over “mini-structured” solid catalyst beds formed e.g., of channeled honeycomb monoliths incorporating solid catalysts achieve reaction efficiencies suitable for effective integral reactor operation by utilizing low superficial liquid linear velocities and high feedstream gas:liquid ratios; single-pass conversion efficiencies in excess of 50%, typically 80-100%, are achieved.Type: GrantFiled: March 30, 2001Date of Patent: October 14, 2003Assignee: Corning IncorporatedInventor: Wei Liu
-
Patent number: 6627778Abstract: 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: GrantFiled: April 19, 2001Date of Patent: September 30, 2003Assignees: China Petrochemical Corporation, Sinopec, Jinling Petrochemical CorporationInventors: Yi Xu, Peicheng Wu, Yu Wang, Dong Liu, Zhengguo Ling, Xiaolei Huang
-
Patent number: 6627578Abstract: A catalyst for selective hydrogenation, which comprises, on the basis of the total weight of catalyst, 1-30 wt % of copper as the first active component, 0.001-5 wt % of palladium as the second active component, 0.001-6 wt % of at least one metal selected from Ag, Pt, Pb, Mn, Co, Ni, Cr, Bi, Zr and Mo as cocatalyst, and the balance of at least one support selected from alumina, silica or titania. The present invention further relates to its preparation, its use in removal of alkynes from alkyne-enriched C4 cuts through selective hydrogenation and its regeneration.Type: GrantFiled: April 30, 2001Date of Patent: September 30, 2003Assignees: China Petro-Chemical Corporation, Beijing Research Institute of Chemical IndustryInventors: Liying Xu, Yunxian Zhu, Yi Yue, Lingke Kong, Shusheng Gao
-
Publication number: 20030171629Abstract: Acetylenic compounds in olefin streams such as mixed 1,3-butadiene were selectively hydrogenated over the supported copper catalysts on highly porous supports such as alumina, silica, etc. The preferred supports have the average pore diameter larger than about 200 Å, no micro pores, total pore volume larger than about 0.65 cc/g, and preferably less than about 230 m2/g BET surface area. The copper catalysts were preferably promoted with the Group VIII metal such as palladium to improve low activity of copper catalyst. The product stream typically contains less than 20 ppm total alkynes. Also the copper catalysts and the palladium promoted copper catalysts may be modified with zinc oxide to improve the performance of the catalysts. The reactor was loaded with two or more copper catalysts promoted with different levels of palladium.Type: ApplicationFiled: February 25, 2003Publication date: September 11, 2003Applicant: CATALYTIC DISTILLATION TECHNOLOGIESInventors: J. Yong Ryu, Gary R. Gildert
-
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
-
Patent number: 6569318Abstract: The invention relates to a process for conversion of hydrocarbons in the presence of at least one catalyst with controlled acidity, characterized in that the level of activity of said catalyst in isomerization of the cyclohexane is less than 0.10 and/or in that the ratio of toluene hydrogenation activity to the cyclohexane isomerization activity is greater than 10.Type: GrantFiled: February 23, 2001Date of Patent: May 27, 2003Assignee: Institut Francais du PetroleInventors: Virginie Harle, Stéphane Kressmann, Isabelle Guibard, Slavik Kasztelan, Frédéric Morel
-
Patent number: 6534436Abstract: The invention relates to catalysts comprising cobalt supported on a solid silica support and, in particular, to a method for manufacturing such catalysts. The catalysts may be prepared by slurrying a silica powder or impregnating a silica particle with a solution of a cobalt compound, cobalt amine carbonate, and aging the resulting slurry or solid at elevated temperature; the cobalt amine carbonate is decomposed and precipitated as basic cobalt carbonate onto the silica support. Preferably, the catalysts have a cobalt surface area in the range of 25 to >100 m2 per gram total cobalt. The catalyst may be used in hydrogenation reactions, Fischer-Tropsch reactions and oxidation reactions.Type: GrantFiled: July 26, 2002Date of Patent: March 18, 2003Assignee: Imperial Chemical Industries PLCInventors: Cornelis M Lok, Stephen Bailey, Gavin Gray
-
Publication number: 20030036669Abstract: Acetylenic compounds in olefin streams such as mixed 1,3-butadiene were selectively hydrogenated over the supported copper catalysts on highly porous supports such as alumina, silica, etc. The preferred supports have the average pore diameter larger than about 200 Å, no micro pores, total pore volume larger than about 0.65 cc/g, and preferably less than about 230 m2/g BET surface area. The copper catalysts were preferably promoted with the Group VIII metal such as palladium to improve low activity of copper catalyst. The product stream typically contains less than 20 ppm total alkynes. Also the copper catalysts and the palladium promoted copper catalysts may be modified with zinc oxide to improve the performance of the catalysts. The reactor was loaded with two or more copper catalysts promoted with different levels of palladium.Type: ApplicationFiled: April 6, 2001Publication date: February 20, 2003Applicant: CATALYTIC DISTILLATION TECHNOLOGIESInventors: J. Yong Ryu, Gary R. Gildert
-
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
-
Patent number: 6506361Abstract: This invention relates to process for carrying out gas-liquid reactions such as those employed in the hydrogenation or oxidation of organic compounds. In the catalytic reaction of a liquid reactant and a gaseous reactant to form a product, the improvement which comprises: pressurizing a liquid reactant and, then, introducing the resultant pressurized liquid reactant to a liquid motive gas ejector wherein it is mixed with the gaseous reactant. The mixture is passed to and reacted in a monolith catalytic reactor. The products are removed from the monolith catalytic reactor at a reduced pressure and, then introduced to a tank. The unreacted materials in the reaction product then are recirculated back to the ejector.Type: GrantFiled: May 18, 2000Date of Patent: January 14, 2003Assignee: Air Products and Chemicals, Inc.Inventors: Reinaldo Mario Machado, Robert Roger Broekhuis
-
Patent number: 6495030Abstract: A process for concurrently fractionating and hydrotreating of a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and fractionation to remove the mercaptans the light fraction and then to simultaneous hydrodesulfurization and splitting of the remainder into an intermediate boiling range naphtha and a heavy boiling range naphtha. The three boiling range naphthas are treated separately according to the amount of sulfur in each cut and the end use of each fraction.Type: GrantFiled: September 28, 2001Date of Patent: December 17, 2002Assignee: Catalytic Distillation TechnologiesInventor: Gary G. Podrebarac
-
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
-
Patent number: 6469223Abstract: A process is provided for the selective hydrogenation of dienes from a mixed hydrocarbon stream. The catalyst contains nickel in an amount between approximately 5 and 15 weight percent and, alternatively, may contain nickel oxide and molybdenum oxide in an amount between approximately 3 to 6 and 12 to 25 weight percent, respectively. The catalyst metals are on an aluminum oxide support. The process does not require any activation or pre-treatment of the catalyst. No sulfur is added to the reaction zone and the catalyst is not adversely affected by the presence of up to 0.20% by weight of sulfur in the feed stream. According to the process, conjugated dienes are reduced by at least 80 to 90%.Type: GrantFiled: January 4, 2000Date of Patent: October 22, 2002Assignee: Fina Technology, Inc.Inventors: Kevin Peter Kelly, James Roy Butler
-
Patent number: 6462244Abstract: A hydrogenation catalyst which is sulfur tolerant and which includes from about 0.1 to about 1 percent platinum by weight and from 0.2 to about 2 percent by weight palladium on a predominantly theta alumina carrier. Also disclosed is a process for the manufacture and use of the hydrogenation catalyst.Type: GrantFiled: October 2, 2001Date of Patent: October 8, 2002Assignee: Sũd-Chemie Inc.Inventors: Dinah C. Huang, William M. Faris, P. Donald Hopkins, Paul Jerus
-
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
-
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
-
Patent number: 6444118Abstract: A process for concurrently fractionating and treating of a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification or selective hydrogenation and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and a heavy boiling range naphtha. The intermediate boiling range naphtha containing thiophene and thiophene boiling range mercaptans, dienes or mixtures may be subjected to a second thioetherification or selective hydrogenation, depending on its make-up, and then passed on to a polishing hydrodesulfurization reactor or the entire intermediate stream may be passed directly to the polishing reactor. The bottoms are subjected to concurrent hydrodesulfurization and fractional distillation and the combined overheads and bottoms are fed to the polishing reactor.Type: GrantFiled: February 16, 2001Date of Patent: September 3, 2002Assignee: Catalytic Distillation TechnologiesInventors: Gary G. Podrebarac, Gary R. Gildert
-
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
-
Patent number: 6420619Abstract: The C3 to C6 cut from a cracking process containing propylene, butane, 1-butene, 2-butene and acetylenic and diene components including butadiene are preferentially converted to propylene. The cut is simultaneously fractionated and catalytically hydrogenated to hydrogenate the acetylenic and diene components. The fractionation and subsequent separation recovers a C4 component comprising a mixture of isobutene, 1-butene and 2-butene. This C4 component is then further simultaneously fractionated and catalytically hydrogenated and hydroisomerized to hydrogenate remaining butadiene, remove isobutene overhead and convert 1-butene to 2-butene leaving a bottoms of 2-butene. The 2-butene is then injected with ethylene and catalytically metathesized to form propylene.Type: GrantFiled: January 25, 2001Date of Patent: July 16, 2002Inventors: Robert J. Gartside, Gary R. Gildert
-
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
-
Patent number: 6414205Abstract: A process for the selective hydrogenation of the methyl acetylene and propadiene (MAPD) in a propylene rich stream is disclosed wherein the selective hydrogenation is carried out stepwise (a) first in a single pass fixed bed reactor and then (b) in a distillation column reactor containing a supported PdO hydrogenation catalyst which serves as a component of a distillation structure. Conversion and selectivity to propylene in improved over the use of the single pass fixed bed reactor alone.Type: GrantFiled: March 24, 2000Date of Patent: July 2, 2002Assignee: Catalytic Distillation TechnologiesInventors: Stephen J. Stanley, Gary R. Gildert
-
Patent number: 6410811Abstract: 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: GrantFiled: March 8, 2001Date of Patent: June 25, 2002Assignee: Institut Francais du PetroleInventors: Michel Chau, Michel Derrien, Alain Methivier
-
Publication number: 20020068843Abstract: This invention relates to a selective hydrogenation catalyst for the seletive hydrogenation of unsaturated hydrocarbons, a process for preparing this catalyst and its use. The catalyst of the invention comprises supporter, active component Pd, rare earth metals, and auxiliary metal Bi, Ag etc. The catalyst is able to hydrogenate high-unsaturated hydrocarbons such as alkyne with high selectivity at high space velocity while both green oil formation and carbon deposition on catalyst are very low, and it is very applicable to industrial cracking process.Type: ApplicationFiled: October 1, 2001Publication date: June 6, 2002Inventors: Wei Dai, Jing Zhu, Hui Peng, Yanlai Guo, Wei Mu, Helong Li, Qingzhou Cui
-
Patent number: 6388162Abstract: The invention pertains to a process of removing dienes from an olefin feedstock. A preferred olefin feedstock is for the production of primary alcohol compositions by skeletal isomerization of the olefins followed by hydroformylation. In this preferred embodiment, the olefin feedstock may be purified before and/or after skeletal isomerization. The olefins in the feedstock preferably have a carbon chain length of about 8 to about 36 carbon atoms, preferably about 10 to about 20 carbon atoms, most preferably about 12 to about 18 carbon atoms.Type: GrantFiled: May 8, 2000Date of Patent: May 14, 2002Assignee: Shell Oil CompanyInventors: Paul B. Himelfarb, Cornelius Mark Bolinger
-
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
-
Publication number: 20020004622Abstract: The present invention provides a process for selectively hydrogenating C2-C10 greater unsaturated hydrocarbons (acetylenes and diolefins) at the upstream side of a front depropanizer or front deethanizer in an olefin production plant. After passing through a mixed phase hydrogenation reactor to selectively hydrogenate, the olefin plant process stream passes to a front depropanizer or front deethanizer. The process according to the present invention is able to selectively hydrogenate C2-C10 greater unsaturated hydrocarbons (including acetylene), to reduce the number of equipments, the amount of equipment fouling and the energy consumption.Type: ApplicationFiled: June 13, 2001Publication date: January 10, 2002Inventors: Wei Dai, Lihua Liao, Jing Zhu, Yanlai Guo, Hui Peng, Wei Mu, Shuo Chen