Abstract: This invention is related to a catalytically cracked or thermally cracked naphtha stream. The naphtha stream is contacted with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions which include temperatures from about 500° C. to about 650° C. and a hydrocarbon partial pressure from about 10 to 40 psia. The resulting product is a high octane naphtha.
Abstract: A platinum-containing aluminum oxide reforming catalyst is disclosed which is modified by incorporating silica therein. The resulting catalyst is used to reform naphtha yielding a reformate having a higher C5 and aromatic content than that achieved using a similar catalyst which contains no added silica.
Type:
Application
Filed:
January 14, 2003
Publication date:
July 24, 2003
Inventors:
Robert A. Crane, Ivy D. Johnson, Vinaya A. Kapoor, John H. Thurtell
Abstract: A SAPO-11 silicoaluminopihosphate molecular sieve, its preparation method, and a catalyst containing the same are disclosed. The X-ray diffraction data of the molecular sieve before removing the template by calcination are as listed in Table 1. The molar composition of this molecular sieve after removing the template by calcination expressed in anhydrous oxides is Al2O3: yP2O5: zSiO2, in which y has a value of 0.60-1.20, and z has a value of 0.05-1.3, characterized in that after removing the template by calcination, its X-ray diffraction data are as listed in Table 3, and that the crystal structures of the molecular sieve before and after removing the template by calcination are substantially the same. The catalyst is composed of 10-85% by weight of said SAPO-11 molecular sieve, 0.05-1.5% by weight of Pd or Pt, and the balance is alumina.
Type:
Grant
Filed:
September 5, 2001
Date of Patent:
July 22, 2003
Assignees:
China Petroleum and Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
Abstract: This invention relates to a process for producing zeolite-bound high silica zeolites and the use of the zeolite-bound high silica zeolite produced by the process for hydrocarbon conversion. The process is carried out by forming an extrudable paste comprising a mixture of high silica zeolite in the hydrogen form, water, silica, and optionally an extrusion aid, extruding the extrudable paste to form silica-bound high silica zeolite extrudates, and then converting the silica of the binder to a zeolite binder. The zeolite-bound high silica zeolite produced by the process comprises high silica zeolite crystals that are bound together by zeolite binder crystals. The zeolite-bound high silica zeolite finds particular application in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, isomerization, and transalkylation reactions.
Type:
Application
Filed:
December 10, 2002
Publication date:
July 10, 2003
Inventors:
Jannetje Maatje van den Berge, Gary David Mohr
Abstract: Process for the hydroisomerization of long-chain n-paraffins which comprises isomerizing n-paraffins having a number of carbon atoms higher than 15 in the presence of hydrogen and a hydroisomerization catalyst which comprises:
Abstract: A process for treating a hydrocarbonaceous material comprising contacting such material with catalysts made from a newly discovered phase of aluminum trihydroxide.
Type:
Application
Filed:
October 25, 2002
Publication date:
July 3, 2003
Inventors:
James Donald Carruthers, Eduardo A. Kamenetzky, Peter J. Achorn
Abstract: Alumina having a pore structure characterized by the absence of macropores, no more than 5% of the total pore volume in pores greater than 350 Å, a high pore volume (greater than 0.8 cc/g measured by mercury intrusion) and a bi-modal pore volume distribution character, where the two modes are separated by 10 to 200 Å, and the primary pore mode is larger than the median pore diameter (MPD), calculated either by volume or by surface area, the MPD by volume being itself larger than the MPD by surface area. Also provided are catalysts made from and processes using such alumina.
Type:
Application
Filed:
December 17, 2002
Publication date:
July 3, 2003
Inventors:
Josiane M. Ginestra, Russell C. Ackerman, Christain G. Michel
Abstract: The present invention relates to a new catalyst support material comprising a mixed oxide consisting essentially of a divalent metal and a trivalent metal in a substantially homogeneous phase, the mixed oxide being a calcination product of a hydrotalcite-like phase calcinated at a temperature of about 700-1200° C., wherein the divalent metal/trivalent metal molar ratio is greater than or equal to 2. The invention also relates to a process of preparing the support. The invention further provides a catalyst for dehydrogenation which includes a transition metal selected from the first row of transition metals of the periodic table and/or a Group VIII metal impregnated on the new catalyst support material. The invention also provides a process for dehydrogenation of light alkanes using the catalyst.
Type:
Grant
Filed:
November 6, 2001
Date of Patent:
June 24, 2003
Assignee:
Oen Norske Stats Oljeselskap A.S.
Inventors:
Erling Rytter, Duncan Akporiaye, Unni Olsbye
Abstract: While a substantially water-free hydrocarbon feed is being charged to a catalytic reformer reactor, an organic chloride is contacted with the reformer catalyst in an amount and for a time period that are effective to restore at least a portion of the activity of the reformer catalyst.
Abstract: The present invention concerns a process for synthesising a zeolite with structure type MTT comprising at least one element X selected from silicon and germanium and at least one element T selected from aluminium, iron gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese, comprising reacting an aqueous mixture comprising at least one source of at least one element X, at least one source of at least one element T, and at least one precursor of an organic compound comprising at least one alkylated polymethylene &agr;-&ohgr; diammonium derivative, characterized in that at least one precursor is selected from monoamines. The present invention also concerns the use of the zeolite obtained as a catalyst in a process for converting hydrocarbon-containing feeds, as an adsorbent to control pollution and as a molecular sieve for separation.
Type:
Grant
Filed:
September 29, 2000
Date of Patent:
April 15, 2003
Assignee:
Institut Francais du Petrole
Inventors:
Loïc Rouleau, Frédéric Kolenda, Eric Benazzi
Abstract: The invention pertains to a cogel comprising oxidic compounds of one or more trivalent metallic elements selected from the group of aluminum, borium, gallium, chromium, iron, cobalt, manganese, vanadium, molybdenum, tungsten, indium, rhodium, scandium, or mixtures thereof, oxidic compounds of one or more tetravalent metallic elements selected from the group of silicon, titanium, germanium, or mixtures thereof and oxidic compounds of one or more divalent metallic elements with at least one divalent metallic element not selected from Group VIII non-noble metallic elements, wherein
a) the cogel is essentially X-ray amorphous apart from saponite, if present;
b) the saponite content CA of the cogel is less than 60%;
c) the cogel has a surface area of at least 400 m2/g;
d) the cogel has a cation-exchange capacity of at least 0.5 wt %; and
e) the total of sodium and potassium contained in the cogel amounts to less than 0.5 wt %, based on the total weight of the cogel.
Abstract: A catalyst for reacting hydrocarbon with steam according to the present invention, has a specific surface area of 40 to 300 m2/g, and comprises:
Abstract: This is a process for upgrading a petroleum naphtha fraction. The naphtha is subjected to reforming and the reformate is cascaded to a benzene and toluene synthesis zone over a benzene and toluene synthesis catalyst comprising a molecular sieve of low acid activity. The preferred molecular sieve is steamed ZSM-5. The benzene and toluene synthesis zone is operated under conditions compatible with the conditions of the reformer such as temperatures of above about 800° F. (427° C.). In one aspect on the invention, the benzene and toluene synthesis catalyst includes a metal hydrogenation component from group VII(B), specifically rhenium. In one mode of operation, the benzene and toluene synthesis catalyst replaces at least a portion of the catalyst in the reformer. The process produces a product containing an increased proportion of benzene, toluene, and/or xylenes, and a reduced portion of alkylated aromatics, as compared to reformate.
Type:
Application
Filed:
August 2, 2002
Publication date:
February 27, 2003
Inventors:
Madhav Acharya, Jeffrey S. Beck, Robert A. Crane, Arthur W. Chester, Vinaya A. Kapoor, Richard C. Kovacs, David L. Stern
Abstract: A catalytic hydrodealkylation/reforming process which comprises contacting a heavy hydrocarbon feedstream under catalytic hydrodealkylation/reforming conditions with a composition comprising borosilicate molecular sieves.
Type:
Application
Filed:
December 11, 2001
Publication date:
January 30, 2003
Inventors:
Cong-Yan Chen, Stacey I. Zones, Andrew Rainis, Dennis J. O'Rear
Abstract: A method for converting benzene and aromatic hydrocarbon compounds having 9 or more carbon atoms contained in a material oil having a boiling point of 30˜210° C. into toluene and aromatic hydrocarbon compounds having 8 carbon atoms in the presence of hydrogen and the said catalyst. The catalyst can be obtained by carrying at least one metal or metal compound selected from Group VIII and Group VIA of the Periodic Table on a carrier containing zeolites in which maximum diameter among diameters of its micropores is 0.6-1.0 nm and a ratio of SiO2/Al2O3 is 50 or more.
Abstract: The present invention refers to a crystalline material of zeolitic nature named ITQ-3 characterized by its characteristic X-ray diffraction pattern and its microporous properties, to the process of preparation thereof characterized by the use of one or several organic additives in a reaction mixture that is made to crystallize by heating and to the use thereof in processes of separation and transformation of organic compounds, which material has the empirical formula x(M1/nXO2):yYO2:SiO2 where x has a value lower than 0.15 and may be equal to zero; and y has a value lower than 0.1 and may be equal to zero; M is H+ or an inorganic cation of charge +n, X is a chemical element with oxidation state (Al, Ge, B and Cr), Y is a chemical element with oxidation state (Ti, Ge and V), and when x=0 and y=0 can be described as a new polymorphous of silica of microporous nature.
Type:
Grant
Filed:
February 28, 2000
Date of Patent:
December 31, 2002
Assignees:
Consejo Superior de Investigacones Cientificas, Universidad Politecnica de Valencia
Inventors:
Miguel-Angel Camblor Fernandez, Avelino Corma Canos, Luis-Angel Villaescusa Alonso
Abstract: A two stage process useful for cetane upgrading of diesel fuels. More particularly, the invention relates to a process for selective naphthenic ring-opening utilizing an extremely low acidic distillate selective catalyst having highly dispersed Pt. The process is a two stage process wherein the first stage is a hydrotreating stage for removing sulfur from the feed and the second stage is the selective ring-opening stage.
Type:
Grant
Filed:
October 16, 2001
Date of Patent:
December 31, 2002
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Ying-Yen P. Tsao, Tracy J. Huang, Philip J. Angevine
Abstract: Disclosed is a method for reforming hydrocarbons comprising contacting the hydrocarbons with a catalyst in a reactor system of improved resistance to carburization and metal dusting under conditions of low sulfur.
Type:
Application
Filed:
September 10, 2001
Publication date:
December 5, 2002
Inventors:
John V. Heyse, Bernard F. Mulaskey, Robert A. Innes, Daniel P. Hagewiesche, Gale L. Hubred, Steven C. Moore, Paul F. Bryan, Robert L. Hise, Steven E. Trumbull, Randall J. Harris
Abstract: Deactivation of a reformer catalyst is inhibited by charging a hydrocarbon feed having a concentration of an organic aluminum halide compound to a reformer reactor operating under reforming conditions and containing a reformer catalyst.
Abstract: A process for preparing a lubricating oil basestock having good low temperature properties. The process includes a first amorphous isomerization catalyst having a pore volume less than 0.99 ml/gm (H2O), an alumina content in the range of 30-50 wt % based on isomerization catalyst and an isoelectric point in the range of 4.5 to 6.5. The isomerization step is followed by a catalytic dewaxing step using an intermediate pore crystalline molecular sieve.
Type:
Grant
Filed:
September 15, 2000
Date of Patent:
November 5, 2002
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
Daniel Paul Leta, Stuart Leon Soled, Gary Brice McVicker, Sylvain Hantzer
Abstract: The instant invention is directed to a process for selectively removing detrital material from boro-aluminosilicate selected from EUO, NES and intergrown mixtures of EUO and NES boro-aluminosilicate topology zeolites having a Si/M ratio of greater than about 50, comprising treating said boro-aluminosilicate with a base for a time and at a temperature sufficient to remove said detrital material from said boro-aluminosilicate wherein the concentration of said base is less than about 0.5 normal. Base concentrations in excess of this level may cause the removal of framework components leading to subsequent structural degradation.
Type:
Grant
Filed:
July 14, 2000
Date of Patent:
October 29, 2002
Assignee:
ExxonMobil Research and Engineering Company
Inventors:
David Evan William Vaughan, Karl Gottlieb Strohmaier
Abstract: A substantially water-free hydrocarbon feed is charged to a multiple-reactor reformer system being operated under reforming conditions and comprising at least two reformer reactors serially connected in fluid-flow communication and each containing a reformer catalyst; and, simultaneously with the charging step, a chloriding agent is sequentially introduced, without simultaneously introducing water, immediately upstream from the inlets of all the reformer reactors in an amount and for a period of time that are effective to inhibit the deactivation of the reformer catalyst.
Abstract: The invention is related to a catalyst and a process for selectively producing light (i.e., C2-C4) olefins from a catalytically cracked or thermally cracked naphtha stream. The naphtha stream is contacted with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions. The catalysts do not require steam activation.
Abstract: For transforming hydrocarbons into aromatic compounds, the reaction is conducted on a homogeneous bed of catalyst particles, said catalyst comprising at least one amorphous matrix, at least one noble metal, at least two additional metals M1 and M2 and at least one halogen, and in which, for a catalyst particle, Cpt is the local concentration of platinum; CM1 is the local concentration of additional metal M1; CM2 is the local concentration of additional metal M2; in which the standard deviation of the distribution of the local ratios of the concentrations of the additional metals, CM1/CM2, measured along the particle diameter, is better than 25% relative.
Type:
Grant
Filed:
February 8, 2000
Date of Patent:
September 17, 2002
Assignee:
Institut Francais du Petrole
Inventors:
Hervé Cauffriez, Fabienne Le Peltier, Elisabeth Rosenberg
Abstract: The present invention relates to a new crystalline zeolite SSZ-53 prepared by using phenylcycloalkylmethyl ammonium cations as structure directing agents.
Abstract: A new family of crystalline metal oxide compositions have been synthesized. These compositions are described by the empirical formula:
AnTaMxM′yM″mOp
where A is an alkali metal cation, ammonium ion and mixtures thereof, M is tungsten, molybdenum, or mixtures thereof. M′ is vanadium, antimony, tellurium, niobium and mixtures thereof, and M″ is titanium, tin, indium and gallium, aluminum, bismuth and mixtures thereof. M′ and M″ are optional metals. These compositions are characterized by having an x-ray diffraction pattern having at least one peak at a d spacing of about 3.9 Å. These materials can be used in various hydrocarbon conversion processes such as dehydrogenation.
Type:
Grant
Filed:
December 22, 2000
Date of Patent:
August 6, 2002
Assignee:
UOP LLC
Inventors:
Robert L. Bedard, Lisa M. King, Paula L. Bogdan, Susan C. Koster
Abstract: Disclosed are a process for producing aromatic hydrocarbon compounds and liquefied petroleum gas (LPG) from a hydrocarbon feedstock having boiling points of 30-250° C. and a catalyst useful therefor. In the presence of said catalyst, aromatic components in the hydrocarbon feedstock are converted to BTX-enriched components of liquid phase through hydrodealkylation and/or transalkylation, and non-aromatic components are converted to LPG-enriched gaseous materials through hydrocracking. The products of liquid phase may be separated as benzene, toluene, xylene, and C9 or higher aromatic compounds, respectively according to their different boiling points, while LPG is separated from the gaseous products, in a distillation tower.
Type:
Application
Filed:
November 20, 2001
Publication date:
July 18, 2002
Inventors:
Sun Choi, Seung-Hoon Oh, Yong-Seung Kim, Beung-Soo Lim, Kyeong-Hak Seong
Abstract: Nitrogenous compounds especially bases such as ammonia vapor are used to control the operation of a hydrocracker or catalytic dewaxer. Catalyst activity and selectivity may be controlled by addition of the base to the feed, for example, to control the balance between isomerization and hydrocracking in an operation using a zeolite beta catalyst. Runaway conditions may be controlled by the addition of nitrogenous compounds to regulate the temperature profile within the reactor.
Type:
Grant
Filed:
December 30, 1994
Date of Patent:
July 9, 2002
Assignee:
Mobil Oil Corporation
Inventors:
Tai-Sheng Chou, Nai Yuen Chen, Grant G. Karsner, Clinton R. Kennedy, Rene B. LaPierre, Melcon G. Melconian, Richard J. Quann, Stephen S. Wong
Abstract: The present invention relates to zeolithic materials having a characteristic X ray diffraction pattern, and its preparation method, characterized by the relatively low pH of the synthesis medium and the use of F− anions as mineralizing agent. The invention also claims the use of the obtained material in catalytic processes for the transformation of hydrocarbons and in oxidation process. The method comprises heating at 363-473° K a reaction mixture which contains a source of at least one tetravalent element T(IV), optionally a source of an element T(III), optionally H2O2, a structure director organic cation, a source of anions F− and water, the presence of alkaline cations is not necessary.
Type:
Grant
Filed:
June 19, 2000
Date of Patent:
June 25, 2002
Assignee:
Consejo Superior de Investigaciones Cientificas Universidad
Politecnica de Valencia
Abstract: A catalytic material includes a microporous zeolite supported on a mesoporous inorganic oxide support. The microporous zeolite can include zeolite beta, zeolite Y or ZSM-5. The mesoporous inorganic oxide can be, e.g., silica or alumina, and can optionally include other metals. Methods for making and using the catalytic material are described herein.
Type:
Application
Filed:
November 27, 2001
Publication date:
June 20, 2002
Inventors:
Zhiping Shan, Jacobus Cornelius Jansen, Chuen Y. Yeh, Johannes Hendrik Koegler, Thomas Maschmeyer
Abstract: Waxy feeds are treated under hydroisomerization conditions to produce good yields of an isomerate product of high VI by using a silica-alumina based catalyst in which the silica-alumina has a pore volume less of 0.99 ml/gm (H2O), an alumina content in the range of 35 to 55 wt % and an isoelectric point in the range of 4.5 to 6.5. A lube fraction of the isomerate is dewaxed to provide a lube basestock of high VI. The silica-alumina may be modified with a rare earth oxide or yttria or boria or magnesia in which instance the modified catalyst has an isoelectric point greater than but no more than 2 points greater than base the silica-alumina.
Type:
Grant
Filed:
November 14, 2000
Date of Patent:
May 7, 2002
Assignee:
Exxon Research and Engineering Company
Inventors:
Kenneth Lloyd Riley, William John Murphy, Ian Alfred Cody, Stuart Leon Soled, Gary Brice McVicker, Sabato Miseo
Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a large-pore molecular-sieve catalyst containing a uniformly distributed platinum-group metal component, and a tin component incorporated into the large-pore molecular sieve by secondary synthesis. The use of this catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.
Type:
Grant
Filed:
May 25, 1999
Date of Patent:
March 19, 2002
Assignee:
UOP LLC
Inventors:
Paula L. Bogdan, Qianjun Chen, Jaime G. Moscoso, Jeffery C. Bricker
Abstract: A process for conversion of hydrocarbon feed by contacting the feed with a catalyst containing heteropoly acid supported on a carrier at reaction conditions being effective in the conversion of the feed, wherein the carrier is selected from substantially inert inorganic amorphous or crystalline material, which retains characteristic structure of the heteropoly acid as evidenced by vibration frequencies around 985 and 1008 cm−1, and which has a surface area larger than 15 m2/g excluding surface area in pores below 15 Å in diameter.
Type:
Application
Filed:
July 12, 2001
Publication date:
February 28, 2002
Applicant:
Haldor Topsoe A/S
Inventors:
Olga V. Masloboishchikova, Aleksandr V. Ivanow, Tatjana V. Vasina, Leonid M. Kustov, Peter Lehrmann, Simon Jacobsen, Jindrich Houzvicka
Abstract: A catalyst composition and a process for hydrodealkylating a C9+ aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises an alumina, a metal oxide, and a coke suppressor selected from the group consisting of silicon oxides, phosphorus oxides, boron oxides, magnesium oxides, tin oxides, titanium oxides, zirconium oxides, molybdenum oxides, germanium oxides, indium oxides, lanthanum oxides, cesium oxides, and combinations of any two or more thereof. The process comprises contacting a fluid which comprises a C9+ aromatic compound with the catalyst composition under a condition sufficient to effect the conversion of a C9+ aromatic compound to a C6 to C8 aromatic hydrocarbon.
Abstract: A C4+naphtha hydrocarbon feed is converted to light olefins and aromatics, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, a substantially inert matrix material such as silica and/or clay, having less than about 20 wt % active matrix material based on total catalyst composition, and phosphorus.
Type:
Application
Filed:
July 12, 1999
Publication date:
December 20, 2001
Inventors:
ARTHUR W. CHESTER, KE LIU, ROBERT A. WARE
Abstract: The invention is related to a two step process wherein the first step comprises cracking an olefinic naphtha resulting in a cracked product having a diminished total concentration of olefinic species. The second step comprises hydroprocessing at least a portion of the cracked product, especially a naphtha fraction, to provide a hydroprocessed cracked product having a reduced concentration of contaminant species but without a substantial octane reduction.
Type:
Grant
Filed:
November 10, 1999
Date of Patent:
November 13, 2001
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Paul K. Ladwig, Gordon F. Stuntz, Garland B. Brignac, Thomas R. Halbert
Abstract: A process for producing propylene from a catalytically cracked or thermally cracked naphtha stream is disclosed herein. The naphtha stream is contacted with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions which include temperatures from about 500° C. to 650° C. and a hydrocarbon partial pressure from about 10 to 40 psia. A separate stream containing aromatics may be co-fed with the naphtha stream.
Type:
Grant
Filed:
May 19, 2000
Date of Patent:
November 6, 2001
Assignee:
ExxonMobile Chemical Patents, Inc.
Inventors:
Paul K. Ladwig, John E. Asplin, Gordon F. Stuntz, William A. Wachter, Brian Erik Henry, Shun C. Fung, Tan-Jen Chen, Jay F. Carpency, Ronald G. Searle
Abstract: A process, preferably in a counter-current configuration, for selectively cracking carbon-carbon bonds of naphthenic species using a low acidic catalyst, preferably having a crystalline molecular sieve component and carrying a Group VIII noble metal. The diesel fuel products are higher in cetane number and diesel yield.
Type:
Application
Filed:
May 16, 2001
Publication date:
October 11, 2001
Inventors:
Ying-Yen P. Tsao, Tracy J. Huang, Philip J. Angevine
Abstract: Disclosed are silicoaluminates (SAPOs) having unique silicon distributions, a method for their preparation and their use as naphtha cracking catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution.
Type:
Grant
Filed:
May 20, 1999
Date of Patent:
October 9, 2001
Assignee:
Exxon Research and Engineering Company
Inventors:
Karl G. Strohmaier, David E. W. Vaughan, Tan Jen Chen, Philip A. Ruziska, Brian Erik Henry, Gordon F. Stuntz, Stephen M. Davis
Abstract: Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions, a method for their preparation and their use as catalysts for the catalytic cracking of hydrocarbon feedstocks. More particularly, the new SAPOs have a high silica:alumina ratio, and are prepared from microemulsions containing surfactants.
Type:
Grant
Filed:
May 20, 1999
Date of Patent:
September 11, 2001
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Javier Agundez Rodriguez, Joaquin Perez Pariente, Antonio Chica Lara, Avelino Corma Canos, Tan Jen Chen, Philip A. Ruziska, Brian Erik Henry, Gordon F. Stuntz, Stephen M. Davis
Abstract: A process for reforming naphtha-containing hydrocarbon feedstreams is disclosed wherein a naphtha stream containing at least about 25 wt % of C5 to C9 aliphatic and cycloaliphatic hydrocarbons is contacted with a modified reforming catalyst, e.g. ZSM-5, containing a dehydrogenation metal, e.g. zinc, which has been modified by contact with Group IIA alkaline earth metal, e.g. barium, or with an organosilicon compound in an amount sufficient to neutralize at least a portion of the surface acidic sites present on the catalyst. The resulting reformate contains a reduced content of C1 to C4 gas and a C8 aromatic fraction having an enhanced content of para-xyelene.
Abstract: A process, preferably in a counter-current configuration, for selectively cracking carbon-carbon bonds of naphthenic species using a low acidic catalyst, preferably having a crystalline molecular sieve component and carrying a Group VIII noble metal. The diesel fuel products are higher in cetane number and diesel yield.
Type:
Grant
Filed:
June 11, 1999
Date of Patent:
June 5, 2001
Assignee:
Mobil Oil Corporation
Inventors:
Ying-Yen P. Tsao, Tracy J. Huang, Philip J. Angevine
Abstract: A process is provided for selectively producing diesel fuel with increased cetane number from a hydrocarbon feedstock. The process includes contacting the feedstock with a catalyst which has a large pore crystalline molecular sieve material component having a faujasite structure and alpha acidity of less than 1, preferably about 0.3 or less. The catalyst also contains a dispersed Group VIII noble metal component which catalyzes the hydrogenation/hydrocracking of the aromatic and naphthenic species in the feedstock.
Type:
Grant
Filed:
December 30, 1998
Date of Patent:
April 3, 2001
Assignee:
Mobil Oil Corporation
Inventors:
Ying-Yen P. Tsao, Tracy J. Huang, Philip J. Angevine
Abstract: A catalytic reforming process comprising the catalytic conversion of hydrocarbons to aromatics, said process comprising treating a halided zeolite catalyst (hiz-cat) containing a Group VIII metal at commercial startup conditions and then reforming hydrocarbons, wherein said catalyst is prepared by washing a bound zeolite catalyst base or a bound zeolite catalyst before halide addition. A preferred hiz-cat is a non-acidic Pt K L-zeolite catalyst prepared by a process that includes the steps of preparing a calcined silica-bound K L-zeolite catalyst base; washing said bound zeolite catalyst base with a liquid comprising water; and incorporating Pt and halogen-containing compound(s) comprising chlorine and fluorine into said washed catalyst base. Ammonium chloride and ammonium fluoride are preferred halide sources.
Type:
Grant
Filed:
January 8, 1998
Date of Patent:
March 27, 2001
Assignee:
Chevron Chemical Company LLC
Inventors:
Dennis L. Holtermann, Charles R. Wilson, Wayne S. Masumura, Michio Sugimoto, Hiroshi Ohashi
Abstract: A method for optimizing the yield of light olefins in a process for the conversion of a heavy hydrocarbon stream to aromatics and light olefins by contacting the heavy hydrocarbon stream with a zeolite catalyst along with the controlled introduction of a paraffin stream co-feed.
Type:
Grant
Filed:
May 13, 1998
Date of Patent:
March 20, 2001
Assignee:
Phillips Petroleum Company
Inventors:
Scott Douglas Love, Charles Alfred Drake
Abstract: A catalytic reforming process comprising the catalytic conversion of hydrocarbons to aromatics, said process comprising treating a halided zeolite catalyst (hiz-cat) containing a Group VIII metal at commercial startup conditions and then reforming hydrocarbons, wherein said catalyst is prepared by washing a bound zeolite catalyst base or a bound zeolite catalyst before halide addition. A preferred hiz-cat is a non-acidic Pt K L-zeolite catalyst prepared by a process that includes the steps of preparing a calcined silica-bound K L-zeolite catalyst base; washing said bound zeolite catalyst base with a liquid comprising water; and incorporating Pt and halogen-containing compound(s) comprising chlorine and fluorine into said washed catalyst base. Ammonium chloride and ammonium fluoride are preferred halide sources.
Type:
Grant
Filed:
November 24, 1998
Date of Patent:
February 20, 2001
Assignee:
Chevron Chemical Company LLC
Inventors:
Dennis L. Holtermann, Charles R. Wilson, Wayne S. Masumura, Michio Sugimoto, Hiroshi Ohashi