With Additional Separation Of Vapor Products Patents (Class 208/103)
  • Patent number: 10316259
    Abstract: A process for converting hydrocarbon feedstock into olefins and BTX including feeding a hydrocarbon feedstock to a first hydrocracking unit, feeding effluent from the first hydrocracking unit to a first separation section to be separated, feeding a steam including propane to a dehydrogenation unit, and feeding effluent from the dehydrogenation unit to a second separation section.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: June 11, 2019
    Assignees: SAUDI BASIC INDUSTRIES CORPORATION, SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Christoph Dittrich, Joris Van Willigenburg, Raúl Velasco Pelaez, Egidius Jacoba Maria Schaerlaeckens, Vijayanand Rajagopalan, Andrew Mark Ward, Arno Johannes Maria Oprins, Ravichander Narayanaswamy
  • Patent number: 10301561
    Abstract: A process for converting hydrocarbons into olefins and BTX based on a combination of hydrocracking, thermal and catalytic dehydrogenation.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: May 28, 2019
    Assignees: SAUDI BASIC INDUSTRIES CORPORATION, SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Christoph Dittrich, Joris Van Willigenburg, Raúl Velasco Pelaez, Egidius Jacoba Maria Schaerlaeckens, Andrew Mark Ward, Arno Johannes Maria Oprins, Vijayanand Rajagopalan, Ravichander Narayanaswamy
  • Patent number: 10160922
    Abstract: Processes and apparatuses for the production of olefins are provided. In an embodiment, a process for production of a process is provided for increasing light olefin yield comprising passing a hydrocarbon feedstream comprising paraffins, naphthenes and aromatic hydrocarbons to a catalytic reforming unit. The hydrocarbon feedstream is contacted with a reforming catalyst under mild reforming conditions suitable for converting naphthenes into aromatics while minimizing conversion of the paraffins, to provide a reforming effluent stream. The reforming effluent stream is passed to a solvent extraction unit to provide an overhead stream comprising predominantly paraffins and a bottoms stream comprising predominantly aromatics. Finally, the overhead stream is passed to a cracking unit to provide a product stream comprising the light olefins.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: December 25, 2018
    Assignee: UOP LLC
    Inventor: Gregory Funk
  • Patent number: 9682903
    Abstract: A method for treating a gas stream comprising hydrogen and propane, where a combination of membrane separation and elevated pressure distillation is used to separate the hydrogen gas from the propane gas.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: June 20, 2017
    Assignee: NESTE OYJ
    Inventors: Pekka Savolainen, Rogier Van De Velde, Martijn Van Den Berg, Juha Visuri
  • Patent number: 9017547
    Abstract: The recycle gas stream containing hydrogen that is part of the feedstream to a hydroprocessing reactor is mixed with the low purity make-up hydrogen and the sour flash gases upstream of the recycle gas compressor and compressed by the recycle gas compressor. The compressed gases pass through a methane and higher (C1+) absorber to produce a sweet hydrogen recycle gas stream that is delivered to the hydroprocessing reactor at 96-98 mol % hydrogen. The process can be used to advantage in existing process facilities to increase the hydrogen partial pressure in the feedstream to the hydroprocessor where the existing recycle gas compressor is not designed for compressing the high purity hydrogen.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: April 28, 2015
    Assignee: Saudi Arabian Oil Company
    Inventors: Yuv R. Mehra, Ali H. Al-Abdulai
  • Patent number: 8932456
    Abstract: An integrated process for the manufacture of olefins and intermediates for the production of ammonia and urea, comprising an FCC reactor, a regenerator, a steam reforming unit, an air-separation unit, an ammonia production unit and a urea production unit, is described. This process makes it possible to minimize CO2 emissions to atmosphere, make use of heavy feedstocks of low added value (AR) for the production of light olefins, in addition to making maximum use of all the flows involved, thus increasing the energy efficiency achieved, all at the same time.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: January 13, 2015
    Assignee: Petroleo Brasileiro S.A.—Petrobras
    Inventors: Leonardo Fialho de Mello, Oscar Rene Chamberlain Pravia, Gustavo Torres Moure
  • Patent number: 8568584
    Abstract: A method is described for controlling instability of operation in a de-ethanizer tower (13) in the gas recovery unit in fluid catalytic cracking units and delayed coking units. The method comprises the step of intervening in the de-ethanizer tower (13) when instability occurs in it, and adjusting the material balance of water in such a way that the excess of water in the feed load stream (9) is removed only as an azeotrope. The intervention is performed by introducing into the feed load stream (9) of the de-ethanizer tower (13) a volume fraction (18) of a flow of hydrocarbon, which may be either dry hydrocarbons or hydrocarbons with a low level of water content.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: October 29, 2013
    Assignee: Petroleo Brasileiro S.A.-Petrobras
    Inventors: Mario de Sousa Almeida, Neyde Alexandra Fraga Marques, Francisco Carlos da Costa Barros, Claudine Toledo Alvares da Silva Costa
  • Patent number: 8506891
    Abstract: An apparatus is disclosed for catalytically converting two feed streams. The feed to a first catalytic reactor may be contacted with product from a second catalytic reactor to effect heat exchange between the two streams and to transfer catalyst from the product stream to the feed stream. The feed to the second catalytic reactor may be a portion of the product from the first catalytic reactor.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: August 13, 2013
    Assignee: UOP LLC
    Inventors: Laura E. Leonard, Jibreel A. Qafisheh, Robert L. Mehlberg
  • Patent number: 8231847
    Abstract: An apparatus is disclosed for recovering product from catalytically converted product streams. Gaseous unstabilized naphtha from an overhead receiver from a main fractionation column is compressed in a compressor. Liquid unstabilized naphtha from the overhead receiver and liquid naphtha fraction from the compressor are sent to a naphtha splitter column upstream of a primary absorber. Consequently, less naphtha is circulated in the gas recovery system.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: July 31, 2012
    Assignee: UOP LLC
    Inventors: Joao Jorge da Silva Ferreira Alves, Saadet Ulas Acikgoz, Xin X. Zhu, Laura E. Leonard
  • Publication number: 20120024749
    Abstract: A method and system are disclosed for treating the effluent from a hydrocarbon pyrolysis unit employing a small primary fractionator. The method comprises cooling the effluent from a furnace through a first heat exchanger, a vapor-liquid separator, and a second heat exchanger before it is passed to a fractionator for further processing. These heat exchangers may also be utilized to heat a utility fluid as part of the cooling process. Further, one or more generators and a third heat exchanger may also be used to assist in heat recovery for the process.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Inventors: Robert D. Strack, James R. Arnold
  • Patent number: 8066868
    Abstract: Processing schemes and arrangements are provided for the processing a heavy hydrocarbon feedstock via fluidized catalytic cracking with selected hydrocarbon fractions including light olefins being obtained via absorption and separation product recovery.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: November 29, 2011
    Assignee: UOP LLC
    Inventor: Joseph E. Zimmermann
  • Patent number: 8038869
    Abstract: Processes and systems are provided for removing contaminants from a vapor stream containing hydrocarbon and hydrogen, and can include: providing a feed stream to a first pressurized vapor liquid separator that produces a liquid stream and a vapor stream containing hydrocarbon and hydrogen, passing the vapor stream to an inlet of a particulate trap containing a plurality of treatment zones that remove contaminants from the vapor stream to produce a particulate trap effluent, and passing the particulate trap effluent directly to a catalytic hydrogenation zone. The processes and systems can also include: passing the liquid stream from the first pressurized vapor liquid separator to a second vapor liquid separator that produces an overhead vapor stream and a liquid bottoms stream, condensing the overhead vapor stream from the second vapor liquid separator to form a liquid overhead stream, routing the liquid overhead stream to the inlet of the particulate trap.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 18, 2011
    Assignee: UOP LLC
    Inventor: Tom N. Kalnes
  • Publication number: 20110100873
    Abstract: An improved process for hydrocracking heavy petroleum feedstocks wherein hydrogen-containing streams associated with a hydrocracker are subjected to rapid cycle pressure swing adsorption having a cycle time of less than 30 S.
    Type: Application
    Filed: January 23, 2006
    Publication date: May 5, 2011
    Inventors: John W. Viets, Narasimhan Sundaram, Bal K. Kaul, David L. Stern
  • Patent number: 7799964
    Abstract: Liquefied Petroleum Gas (LPG) can be recovered from various streams using a multiple membrane recovery process producing hydrogen stream at high yield and high purity and a C3+ LPG stream at high yield with low energy expenditure.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: September 21, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Bhupender S. Minhas, David W. Staubs
  • Patent number: 7785547
    Abstract: An apparatus and a method that increase the concentration of recycled hydrogen in the hydrogenation unit are disclosed having a hydration separation unit included between the high-pressure separator and hydrocracking reactor. A part of the recycled hydrogen contacts with the water-in-oil microemulsion to form hydrates from which the light hydrocarbon components are removed. The gas flow entering into the hydration separation unit is present in amount of 20%˜100% of the total gas flow coming from the high-pressure separator; the water-in-oil microemulsion, in which the volume ratio of oil and water is 1:1 to 5:1 may increase hydrogen partial pressure in the reactor and thus upgrade the performance of hydrogenation.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: August 31, 2010
    Assignees: PetroChina Company Limited, China University of Petroleum Beijing
    Inventors: Guangjin Chen, An Ma, Lijun Yan, Xuqiang Guo, Changyu Sun, Xiulin Wang
  • Patent number: 7780843
    Abstract: A method is provided for treating the effluent from a hydrocarbon pyrolysis unit processing heavier than naphtha feeds to recover heat and remove tar therefrom. The method comprises passing the gaseous effluent to at least one primary transfer line heat exchanger, thereby cooling the gaseous effluent and generating superheated steam. Thereafter, the gaseous effluent is passed through at least one secondary transfer line heat exchanger having a heat exchange surface with a liquid coating on said surface, thereby further cooling the remainder of the gaseous effluent to a temperature at which tar, formed by the pyrolysis process, condenses. The condensed tar is then removed from the gaseous effluent in at least one knock-out drum. An apparatus for carrying out the method is also provided.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: August 24, 2010
    Assignee: ExxonMobil Chemical Company Patents Inc.
    Inventors: Robert David Strack, David R. Spicer, George Stephens, James Mitchell Frye
  • Patent number: 7763162
    Abstract: A method is disclosed for treating the effluent from a hydrocarbon pyrolysis unit processing heavier than naphtha feeds to recover heat and remove tar therefrom. The method comprises passing the gaseous effluent to at least one primary heat exchanger, thereby cooling the gaseous effluent and generating superheated steam. Thereafter, the gaseous effluent is passed through at least one secondary heat exchanger having a heat exchange surface maintained at a temperature such that part of the gaseous effluent condenses to form a liquid coating on said surface, thereby further cooling the remainder of the gaseous effluent to a temperature at which tar, formed by the pyrolysis process, condenses. The condensed tar is then removed from the gaseous effluent in at least one knock-out drum. An apparatus for carrying out this method is also provided.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: July 27, 2010
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventor: Robert David Strack
  • Patent number: 7749372
    Abstract: A method is disclosed for treating the effluent from a hydrocarbon pyrolysis unit without employing a primary fractionator. The method comprises passing the gaseous effluent to at least one primary heat exchanger, thereby cooling the gaseous effluent and generating high pressure steam, and then cooling the gaseous effluent to a temperature at which tar, formed by reactions among constituents of the effluent, condenses. The gaseous effluent and the condensed tar are fed to at least one knock-out drum, whereby the tar is separated from the gaseous effluent. The gaseous effluent is then further cooled to condense a pyrolysis gasoline fraction from the effluent and to reduce the temperature of the effluent to a point at which it can be compressed efficiently. The condensed pyrolysis gasoline fraction is separated from the effluent and then distilled so as to reduce its final boiling point.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: July 6, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Robert David Strack, John R. Messinger
  • Patent number: 7674366
    Abstract: A method is disclosed for treating the effluent from a hydrocarbon pyrolysis unit without employing a primary fractionator. The method comprises cooling the gaseous effluent, e.g., by direct quench and/or at least one primary heat exchanger, thereby generating high pressure steam, and then cooling the gaseous effluent to a temperature at which tar, formed by reactions among constituents of the effluent, condenses. The resulting mixed gaseous and liquid effluent is passed through a quench oil knock-out drum, to separate quench oil from the gaseous effluent which is then cooled to condense a liquid effluent comprising pyrolysis gasoline and water condensed from steam, which fractions are separated in a distillate drum. The cooled gaseous effluent is directed to a recovery train, to recover light olefins. The pyrolysis gasoline-containing fraction passes to a tailing tower which provides an overhead stream rich in pyrolysis gasoline and a bottoms stream rich in gas oil.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: March 9, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Robert David Strack, John R. Messinger
  • Publication number: 20100025294
    Abstract: A process for producing a middle distillate or a middle distillate blending component, comprising contacting a feed comprising an olefin, an isoparaffin, and less than 5 wt % oligomerized olefin, in an ionic liquid alkylation zone with an acidic haloaluminate ionic liquid, at alkylation conditions; and recovering an effluent comprising an alkylated product that has greater than 35 vol % C10+ and less than 1 vol % C55+. Also processes for producing a middle distillate by alkylating isobutane and butene in the presence of defined chloroaluminate ionic liquid catalysts, wherein a separating step separates the middle distillate and wherein the middle distillate is from 20 wt % or higher of the total alkylate product. Also a process for producing middle distillate with FC cracker feed comprising olefins. A separated middle distillate has greater than 30 vol % C10+, less than 1 vol % C55+, and a cloud point less than ?50° C.
    Type: Application
    Filed: July 31, 2008
    Publication date: February 4, 2010
    Inventors: Sven Ivar Hommeltoft, Stephen J. Miller, Ajit Pradhan
  • Patent number: 7591940
    Abstract: A catalytic hydrocracking process for the production of ultra low sulfur diesel wherein a hydrocarbonaceous feedstock is hydrocracked at elevated temperature and pressure to obtain conversion to diesel boiling range hydrocarbons. The resulting hydrocracking zone effluent is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the hydrocracking zone to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. The first gaseous hydrocarbonaceous stream containing diesel boiling range hydrocarbons is introduced into a desulfurization zone and subsequently partially condensed to produce a hydrogen-rich gaseous stream and a second liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons. At least a portion of the first liquid stream is thermal cracked to produce diesel boiling range hydrocarbons. An ultra low sulfur diesel product stream is recovered.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: September 22, 2009
    Assignee: UOP LLC
    Inventor: Tom N. Kalnes
  • Patent number: 7479217
    Abstract: The invention concerns a process for treating a hydrocarbon feed comprising a series of a first upstream process for hydrocarbon hydroconversion comprising at least one reaction chamber, the reaction or reactions occurring inside said chambers and employing at least one solid phase, at least one liquid phase and at least one gas phase, and a second downstream steam reforming process comprising at least one reaction chamber, characterized in that the said upstream process is carried out in a “slurry” and/or an ebullated bed mode and in that the downstream process comprises a first step for at least partial conversion of hydrocarbons heavier than methane into methane, termed the pre-reforming step, and in that the reaction or reactions occurring inside the chambers of the downstream stream reforming process enables the production of a reagent, namely hydrogen, which is necessary for the reactions in the first upstream process.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: January 20, 2009
    Assignee: Institut Francais du Petrole
    Inventors: Mathieu Pinault, Thierry Gauthier, Stéphane Kressmann, Arnault Selmen
  • Patent number: 7452458
    Abstract: Process for treatment of a hydrocarbon feedstock that comprises a hydrocarbon-containing liquid phase and hydrogen, in which the feedstock is separated under a pressure P1 into a liquid L1 and a gas G1, that is compressed and brought into contact with a portion of L1 under a pressure P2>2×P1 to recover a liquid L2 and a hydrogen-rich gas G2; L2 is fractionated to obtain a stabilized liquid L4a that is free of LPG and lighter products, a liquid stream of LPG, and a gas stream G4 that is recycled, and in which one of gas streams: recompressed G1 and G4 is in counter-current contact with an unstabilized liquid AL that is obtained from or extracted from L1 or L2, whereby this unstabilized liquid is supercooled by at least 10° C. below its bubble point at pressure P2.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: November 18, 2008
    Assignee: Institute Francais du Petrole
    Inventors: Eric Sanchez, Béatrice Fischer
  • Patent number: 7419582
    Abstract: A hydrocracking process wherein the feedstock is hydrotreated and the liquid and gaseous effluent from the hydrotreater is directly introduced into the upper end of a hydrocracking vessel which provides a liquid seal to prevent the passage of the gaseous stream containing hydrogen sulfide and ammonia from the hydrotreater to enter the hydrocracking zone containing hydrocracking catalyst. Fresh hydrogen is then introduced into the hydrocracking zone. An apparatus for hydrocracking a hydrocarbon feedstock is also disclosed.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: September 2, 2008
    Assignee: UOP LLC
    Inventors: Richard K. Hoehn, Vasant P. Thakkar, Vedula K. Murty, Douglas W. Kocher-Cowan, Jennifer L. Anderson
  • Patent number: 7311813
    Abstract: This invention is an improved distillation sequence for the separation and purification of ethylene from a cracked gas. A hydrocarbon feed enters a C2 distributor column. The top of the C2 distributor column is thermally coupled to an ethylene distributor column, and the bottoms liquid of a C2 distributor column feeds a deethanizer column. The C2 distributor column utilizes a conventional reboiler. The top of the ethylene distributor is thermally coupled with a demethanizer column, and the bottoms liquid of the ethylene distributor feeds a C2 splitter column. The ethylene distributor column utilizes a conventional reboiler. The deethanizer and C2 splitter columns are also thermally coupled and operated at a substantially lower pressure than the C2 distributor column, the ethylene distributor column, and the demethanizer column. Alternatively, a hydrocarbon feed enters a deethanizer column.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: December 25, 2007
    Assignee: Ineos USA LLC
    Inventors: Rian Reyneke, Michael Foral, Christos G. Papadopoulos, Jeffrey S. Logsdon, Wayne W. Y. Eng, Guang-Chung Lee, Ian Sinclair
  • Patent number: 7087153
    Abstract: A catalytic hydrocracking process for the production of ultra low sulfur diesel wherein a hydrocarbonaceous feedstock is hydrocracked at elevated temperature and pressure to obtain conversion to diesel boiling range hydrocarbons. The resulting hydrocracking zone effluent is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the hydrocracking zone to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. The first gaseous hydrocarbonaceous stream containing diesel boiling range hydrocarbons is introduced into a desulfurization zone and subsequently partially condensed to produce a hydrogen-rich gaseous stream and a second liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons. At least a portion of the first liquid stream is thermal cracked to produce diesel boiling range hydrocarbons. An ultra low sulfur diesel product stream is recovered.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: August 8, 2006
    Assignee: UOP LLC
    Inventor: Tom N. Kalnes
  • Patent number: 7074321
    Abstract: An integrated hydrocarbon conversion process for the production of low sulfur fuels utilizing a hydrocracking zone, a diesel hydrodesulfurization zone, a fluid catalytic cracking zone and a gasoline hydrodesulfurization zone. The hydrocracking zone is used to convert at least a portion of the feedstock into diesel boiling range hydrocarbons which are desulfurized in the first hydrodesulfurization zone. The unconverted feedstock is introduced into a fluid catalytic cracking zone to produce gasoline boiling range hydrocarbons which are desulfurized in a second hydrodesulfurization zone.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: July 11, 2006
    Assignee: UOP LLC
    Inventor: Tom N. Kalnes
  • Patent number: 7005057
    Abstract: A catalytic hydrocracking process for the production of ultra low sulfur diesel wherein a hydrocarbonaceous feedstock is hydrocracked at elevated temperature and pressure to obtain conversion to diesel boiling range hydrocarbons. The resulting hydrocracking zone effluent is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the hydrocracking zone to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. The first gaseous hydrocarbonaceous stream containing diesel boiling range hydrocarbons is introduced into a desulfurization zone and subsequently partially condensed to produce a hydrogen-rich gaseous stream and a second liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons. At least a portion of the first liquid stream is separated in a dividing wall column to produce a liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons which is also introduced into the desulfurization zone.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: February 28, 2006
    Assignee: UOP LLC
    Inventor: Tom N. Kalnes
  • Patent number: 6860985
    Abstract: The invention relates to a method for improving yield in petroleum streams derived from coking processes. In a preferred embodiment, the invention relates to a method for regenerating filters employed to remove particulate matter from coker gas oil to improve coker gas oil yield and yield of upgraded coker gas oil products.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: March 1, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Michael Siskin, Ramesh R. Hemrajani, Glen E. Phillips, Simon R. Kelemen, Kuangnan Qian
  • Patent number: 6740226
    Abstract: In a hydrocracking unit, the flash gases from the high-pressure separator are fed to the bottom of an absorption zone where the entering gases are counter-currently contacted with a lean solvent. The lean solvent absorbs away the contained methane, ethane, propane, butanes and pentanes (C1+) from the contained hydrogen. The overhead gas stream from the absorption zone typically contains hydrogen at a purity of 90 to 98 mol %, or even higher, which is fed to the recycle gas stream to provide hydrogen purity in the range of 96 to 99 mol %, thereby providing an increase in the overall efficiency of the hydroprocessor unit. The process can also be employed with hydrotreating, hydrodesulfurization, hydrodenitrogenation and hydrodealkylation reactors.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: May 25, 2004
    Assignee: Saudi Arabian Oil Company
    Inventors: Yuv Raj Mehra, Ali Hassan Al-Abdulal
  • Patent number: 6592749
    Abstract: An improved process for separating hydrogen from hydrocarbons. The process includes a pressure swing adsorption step, a compression/cooling step and a membrane separation step. The membrane step uses a rubbery polymeric membrane selective for all C1-C6 hydrocarbons over hydrogen. The process can produce three products: a high-purity hydrogen stream, an LPG stream and a light hydrocarbon fuel gas stream.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: July 15, 2003
    Assignee: Membrane Technology and Research, Inc.
    Inventors: Kaaeid A. Lokhandwala, Richard W. Baker
  • Patent number: 6517705
    Abstract: A catalytic hydrocracking process for the production of lube base oil wherein a hydrocarbonaceous feedstock is contacted with hydrogen and a metal promoted hydrocracking catalyst in a hydrocracking reaction zone at elevated temperature and pressure to obtain conversion to higher hydrogen-content hydrocarbons including lube base oil. The resulting hot, uncooled effluent from the hydrocracking reaction zone is hydrogen stripped in a hot, high pressure stripping zone maintained at essentially the same pressure as the hydrocracking zone to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. At least a portion of the first gaseous hydrocarbonaceous stream is condensed to produce a second liquid hydrocarbonaceous stream and a second hydrogen-rich gaseous stream. The first liquid hydrocarbonaceous stream is preferably separated at a pressure greater than atmospheric pressure to provide at least one lube base oil product stream.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: February 11, 2003
    Assignee: UOP LLC
    Inventors: Tom N. Kalnes, Vasant P. Thakkar
  • Patent number: 6483001
    Abstract: The present invention describes a pressure swing adsorption (PSA) apparatus and process for the production of purified hydrogen from a feed gas stream containing heavy hydrocarbons (i.e., hydrocarbons having at least six carbons). The apparatus comprises at least one bed containing at least three layers. The layered adsorption zone contains a feed end with a low surface area adsorbent (20 to 400 m2/g) which comprises 2 to 20% of the total bed length followed by a layer of an intermediate surface area adsorbent (425 to 800 m2/g) which comprises 25 to 40 % of the total bed length and a final layer of high surface area adsorbent (825 to 2000 m2/g) which comprises 40 to 78% of the total bed length.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: November 19, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Timothy Christopher Golden, Edward Landis Weist, Jr
  • Patent number: 6451197
    Abstract: A catalytic hydrocracking process wherein a hydrocarbonaceous feedstock and a liquid recycle stream having a temperature greater than about 500° F. and saturated with hydrogen is contacted with hydrogen and a metal promoted hydrocracking catalyst in a hydrocracking reaction zone at elevated temperature and pressure to obtain conversion to lower boiling hydrocarbons.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: September 17, 2002
    Assignee: UOP LLC
    Inventor: Tom N. Kalnes
  • Patent number: 6333445
    Abstract: The olefin-hydrogen effluent vapor stream from a dehydrogenation process is separated by a cryogenic separation method utilizing a cryogenic separation system. The method does not require external refrigeration and reheats and portions an expander feed stream to extract energy and controls the warm end and cold end temperature differences in the primary heat exchanger to provide energy savings and economical operation and material use.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: December 25, 2001
    Assignee: Chart, Inc.
    Inventor: John V. O'Brien
  • Patent number: 6296758
    Abstract: A hydrocracking process wherein a hydrocarbonaceous feedstock and a hot hydrocracking zone effluent containing hydrogen is passed to a denitrification and desulfurization reaction zone to produce hydrogen sulfide and ammonia to thereby clean up the fresh feedstock. The resulting hot, uncooled effluent from the denitrification and desulfurization zone is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the preceding reaction zone with a hydrogen-rich gaseous stream to produce a vapor stream comprising hydrogen, hydrocarbonaceous compounds boiling at a temperature below the boiling range of the fresh feedstock, hydrogen sulfide and ammonia, and a liquid hydrocarbonaceous stream.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: October 2, 2001
    Assignee: UOP LLC
    Inventors: Tom N. Kalnes, Vasant P. Thakkar
  • Patent number: 6294080
    Abstract: A feed stream is first processed in a hydrotreating reaction zone and then the effluent is separated into three fractions in an augmented first high pressure separator. Controlled portions of the middle and heavy boiling point range hydrocarbon fractions from this separator are recycled through a low conversion hydrocracking zone, while the remaining portions of these two fractions are passed into a second high pressure separator for recovery. The recycled hydrocarbons flow into a hydrocracking zone and the effluent of this zone flows into the hydrotreating reaction zone.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: September 25, 2001
    Assignee: UOP LLC
    Inventors: Vasant P. Thakkar, Christopher J. Anderle
  • Patent number: 6264828
    Abstract: Processes for providing improved methane removal and hydrogen reuse in reactors, particularly in refineries and petrochemical plants. The improved methane removal is achieved by selective purging, by passing gases in the reactor recycle loop across membranes selective in favor of methane over hydrogen, and capable of exhibiting a methane/hydrogen selectivity of at least about 2.5 under the process conditions.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: July 24, 2001
    Assignee: Membrane Tehnology and Research, Inc.
    Inventors: Richard W. Baker, Kaaeid A. Lokhandwala, Zhenjie He, Ingo Pinnau
  • Patent number: 6190536
    Abstract: Processes and apparatus for providing improved catalytic cracking, specifically improved recovery of olefins, LPG or hydrogen from catalytic crackers. The improvement is achieved by passing part of the wet gas stream across membranes selective in favor of light hydrocarbons over hydrogen.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: February 20, 2001
    Assignee: Membrane Technology and Research, Inc.
    Inventors: Kaaeid A. Lokhandwala, Richard W. Baker
  • Patent number: 6183628
    Abstract: An improved process for separating hydrogen from hydrocarbons. The process includes a pressure swing adsorption step, a compression/cooling step and a membrane separation step. The membrane step relies on achieving a methane/hydrogen selectivity of at least about 2.5 under the conditions of the process.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: February 6, 2001
    Assignee: Membrane Technology and Research, Inc.
    Inventors: Richard W. Baker, Kaaeid A. Lokhandwala, Zhenjie He, Ingo Pinnau
  • Patent number: 6179996
    Abstract: Processes and apparatus for providing improved contaminant removal and hydrogen recovery in hydrogenation reactors, particularly in refineries and petrochemical plants. The improved contaminant removal is achieved by selective purging, by passing gases in the hydrogenation reactor recycle loop or purge stream across membranes selective in favor of the contaminant over hydrogen.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: January 30, 2001
    Assignee: Membrane Technology and Research, Inc.
    Inventors: Richard W. Baker, Kaaeid A. Lokhandwala
  • Patent number: 6171472
    Abstract: Processes and apparatus for providing improved contaminant removal and hydrogen reuse in reactors, particularly in refineries and petrochemical plants. The improved contaminant removal is achieved by selective purging, by passing gases in the reactor recycle loop across membranes selective in favor of the contaminant over hydrogen.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: January 9, 2001
    Assignee: Membrane Technology and Research, Inc.
    Inventors: Kaaeid A. Lokhandwala, Richard W. Baker
  • Patent number: 6165350
    Abstract: Processes and apparatus for providing improved catalytic reforming, specifically improved recovery of reformate and hydrogen from catalytic reformers. The improvement is achieved by passing portions of the reactor effluent or streams derived from the reactor effluent across membranes selective in favor of light hydrocarbons over hydrogen.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: December 26, 2000
    Assignee: Membrane Technology and Research, Inc.
    Inventors: Kaaeid A. Lokhandwala, Richard W. Baker
  • Patent number: 6153804
    Abstract: A process for producing cyclopentane and cyclopentene by fractional distillation of partly hydrogenated pyrolysis gasoline, in which(a) partly hydrogenated pyrolysis gasoline is fractionally distilled in a first distillation column,(b) a C.sub.5 hydrocarbon mixture containing at least 40% of cyclopentane and cyclopentene is taken off from the distillation column as a sidestream at a suitable tray, and(c) the C.sub.5 hydrocarbon mixture is further fractionally distilled into cyclopentane and cyclopentene in a second distillation column.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: November 28, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Kanne, Jurgen Heners, Thomas Krug
  • Patent number: 6096191
    Abstract: A catalytic hydrocracking process wherein a hydrocarbonaceous feedstock and a liquid recycle stream having a temperature greater than about 500.degree. F. and saturated with hydrogen is contacted with hydrogen and a metal promoted hydrocracking catalyst in a hydrocracking reaction zone at elevated temperature and pressure to obtain conversion to lower boiling hydrocarbons. The resulting hot, uncooled effluent from the hydrocracking reaction zone is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the hydrocracking zone to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. At least a portion of the first gaseous hydrocarbonaceous stream is condensed to produce a second liquid hydrocarbonaceous stream and a second hydrogen-rich gaseous stream. At least a portion of the first liquid hydrocarbonaceous stream is recycled to the hydrocracking reaction zone.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: August 1, 2000
    Assignee: UOP LLC
    Inventor: Tom N. Kalnes
  • Patent number: 5954942
    Abstract: A process for thermally and catalytically upgrading a heavy feed in a single riser reactor FCC unit is disclosed. A heavy feed is cracked in the base of the riser at higher than normal cracking temperatures for at least 1.0 seconds of vapor residence time, then quenched. Quenching with large amounts of quench, preferably downstream of the mid point of the riser, increases conversion as compared to use of the same amount of quench within one second. Small amounts of quench, near the riser outlet, crack heavy feed roughly as well as large amounts of quench, near the base of the riser. High velocity, atomizing quench nozzles reduce riser pressure and/or catalyst slip in downstream portions of the riser, further increasing gasoline selectivity and reducing coke yields.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: September 21, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Peter M. Adornato, Amos A. Avidan, David L. Johnson
  • Patent number: 5904836
    Abstract: High-vacuum oil refinery systems and process are disclosed in this invention. The systems and process enables to carry out vaporization and distillation of oils under the condition of 1-10.sup.-4 Torr of high vacuum and at the temperature of not higher than 360.degree. C. and thereby removing possibility of thermal cracking while heating to be vaporized and easily produces high quality oil. The vaporized gases are centrifugally separated and liquefied by specific gravity using high-vacuum gas specific gravity centrifugal separators and thereby producing high purity oil of uniform quality. The process also carries out vaporization and distillation of the oil at the temperature of not higher than 360.degree. C. so that the process prevents vaporization of sulfur components of the oil, but simply drains the sulfur components along with the concentrated sludge oil and thereby distilling and desulfurizing the crude or heavy oil at the same time without using expensive conventional desulfurizing process.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: May 18, 1999
    Assignee: Dae Sung Lee
    Inventors: Dae Sung Lee, Ho Keun Shin
  • Patent number: 5814208
    Abstract: Hydrocarbon fluid catalytic cracking (FCC) plants are debottlenecked by subjecting part or all of the wet gas stream leaving the main fractionator overhead receiver to pressure swing adsorption to remove methane and hydrogen from this gas stream prior to its introduction into the wet gas compressor. This allows debottlenecking of the compressor system. It can allow the reduction in pressure in the system back to the catalyst regenerator. The reduction in pressure in the catalyst regenerator makes it possible to increase the rate of regeneration of catalyst. Consequently, the rate of hydrocarbon throughput in the FCC plant can be increased.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: September 29, 1998
    Inventors: Raghu K. Menon, Ramakrishnan Ramachandran
  • Patent number: 5744687
    Abstract: A hydrocarbon stream is cracked to produce a hot gaseous stream which is compressed and cooled to condense almost all of the hydrocarbons contained in the stream. A noncondensed stream remaining after the condensation step, comprised predominantly of hydrogen and C.sub.1 to C.sub.3 hydrocarbons, is subjected to pressure swing adsorption or temperature swing adsorption at an adsorption temperature of about 0.degree. to about 250.degree. C. in a bed of adsorbent which selectively adsorbs ethylene and propylene, thereby adsorbing substantially all of the ethylene and propylene from the gas stream. The ethylene and/or propylene is recovered upon bed regeneration.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: April 28, 1998
    Assignee: The BOC Group, Inc.
    Inventors: Ramakrishnan Ramachandran, Loc H. Dao
  • Patent number: 5689032
    Abstract: A process and apparatus for separating a hydrocarbon gas into fractions containing predominant portions of hydrogen, methane, and C.sub.2 and heavier components, where the methane and lighter components are separated from the feed gas under non-cryogenic conditions to produce a hydrogen-rich fraction, a first fraction rich in C.sub.2 and heavier components and a hydrocarbon-rich fraction, the hydrocarbon-rich fraction then being separated under cryogenic conditions into a second fraction rich in C.sub.2 and heavier components and a methane-rich fraction.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: November 18, 1997
    Assignee: Krause/Pasadyn, a Partnership
    Inventors: William A. Krause, Ronald C. Pasadyn