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| Number | Title | Issue Date |
| 7311813 | Distillation sequence for the purification and recovery of hydrocarbons 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, an... | 12/25/2007 |
| 7305865 | Hydrocarbon reformer performance sensing system In a fuel cell system, a reformer supplies reformate to a fuel cell stack. A portion of the reformate flow is diverted for analysis by a hydrocarbon analysis system. Residual hydrocarbons in the reformate may damage the anodes of the fuel cell stack. Although incomp... | 12/11/2007 |
| 7214720 | Production of liquid fuels by a concatenation of processes for treatment of a hydrocarbon feedstock The invention relates to an installation and a process for the production of liquid fuels starting from a solid feedstock that contains the organic material in which: a) the solid feedstock is subjected to a gasification stage so a... | 05/08/2007 |
| 7048833 | Method and apparatus for treating oxygenate-containing feeds and their use in conversion of oxygenates to olefins A feed vaporization process and apparatus for oxygenate to olefin conversion is provided which uses a vapor-liquid disengaging drum to separate non-volatiles and/or partial non-volatiles from volatiles in the oxygenate feed and produce a vaporized effluent that is r... | 05/23/2006 |
| 7005057 | Hydrocracking process for the production of ultra low sulfur diesel 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 eff... | 02/28/2006 |
| 6860985 | Process for increasing yield in coking processes 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 ... | 03/01/2005 |
| 6592749 | Hydrogen/hydrocarbon separation process, including PSA and membranes 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 | 07/15/2003 |
| 6540904 | Process for the upgradation of petroleum residue The present invention provides a process for the upgradation of petroleum residue into useful fractions by subjecting petroleum residue in the presence of a solvent and ferrous sulphate catalyst to a pressure in the range of 10 atm. to 120 atm., temperatu... | 04/01/2003 |
| 6517705 | Hydrocracking process for lube base oil production 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 obt... | 02/11/2003 |
| 6333445 | Cryogenic separation process for the recovery of components from the products of a dehydrogenation reactor 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 st... | 12/25/2001 |
| 6264828 | Process, including membrane separation, for separating hydrogen from hydrocarbons 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 membra... | 07/24/2001 |
| 6197163 | Process for removing impurities from petroleum products The impurity content, e.g. propionitrile, in a fraction containing C5 or C6 tertiary olefins obtained by cracking hydrocarbons is reduced by distilling with an alkanol and removing the impurity as a higher boiling point fraction.... | 03/06/2001 |
| 6190540 | Selective purging for hydroprocessing reactor loop A process for hydroprocessing a fluid stream containing at least hydrogen and hydrocarbons. The process uses a hydrocarbon-selective membrane to reduce the concentration of hydrocarbons and contaminants in the hydrogen stream recycled to the hydroprocessi... | 02/20/2001 |
| 6190536 | Catalytic cracking process 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... | 02/20/2001 |
| 6183628 | Process, including PSA and membrane separation, for separating hydrogen from hydrocarbons 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 lea... | 02/06/2001 |
| 6179996 | Selective purge for hydrogenation reactor recycle loop 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... | 01/30/2001 |
| 6171472 | Selective purge for reactor recycle loop 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 recy... | 01/09/2001 |
| 6165350 | Selective purge for catalytic reformer recycle loop 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 reac... | 12/26/2000 |
| 6017441 | Multi-step catalytic process for conversion of a heavy hydrocarbon fraction A process for converting a heavy hydrocarbon fraction comprises treating the hydrocarbon feed in a hydroconversion section in the presence of hydrogen, the section comprising at least one three-phase reactor containing at least one ebullated bed hydroconv... | 01/25/2000 |
| 5980730 | Process for converting a heavy hydrocarbon fraction using an ebullated bed hydrodemetallization catalyst A process for converting a heavy hydrocarbon fraction comprises treating the hydrocarbon feed in a hydroconversion section in the presence of hydrogen, the section comprising at least one three-phase reactor containing at least one ebullated bed hydroconv... | 11/09/1999 |
| 5904836 | High-vacuum oil refinery system and process 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 1-10-4 Torr of high vacuum and at the temperature of not hig... | 05/18/1999 |
| 5877380 | Quench oil viscosity control in pyrolysis fractionator The viscosity of quench oil circulated in a pyrolysis fractionation unit is controlled by contacting pyrolysis furnace effluent with a slip stream of 0.1-0.5 kg/kg of the quench oil, separating the resulting vapor-liquid mixture to remove tarry liquid, an... | 03/02/1999 |
| 5833839 | High purity paraffinic solvent compositions, and process for their manufacture Discloses high purity solvent compositions constituted of n-paraffins and isoparaffins, with the isoparaffins containing predominantly methyl branches, and having an isoparaffin:n-paraffin ratio sufficient to provide superior low temperature properties an... | 11/10/1998 |
| 5689032 | Method and apparatus for recovery of H2 and C2 and heavier components A process and apparatus for separating a hydrocarbon gas into fractions containing predominant portions of hydrogen, methane, and C2 and heavier components, where the methane and lighter components are separated from the feed gas under non-cryo... | 11/18/1997 |
| 5675054 | Low cost thermal coupling in ethylene recovery The invention is a process for reducing capital and energy costs in ethylene recovery. Moderate pressure processing and thermally coupled fractionation steps are achieved through the use of integrator columns. Ethylene separation from cracked gas originat... | 10/07/1997 |
| 5647972 | Low pressure chilling train for olefin plants A method of processing a cracked gas feedstream containing hydrogen and C1 to C6 and heavier hydrocarbons is described using a relatively low pressure as compared to conventional cryogenic separation processes. At pressures below 27 ... | 07/15/1997 |
| 5453177 | Integrated distillate recovery process An integrated three-column process for recovering hydrocarbon distillate products from a hydroprocessing or hydrocracking reactor effluent stream and a hydrocarbon distillate product recovery train are disclosed. According to the present recovery process,... | 09/26/1995 |
| 5414168 | Absorption and cold separation process for recovering purified hydrogen from a catalytic dehydrogenation zone effluent Purified hydrogen is recovered from the effluent of a catalytic dehydrogenation zone using an integrated cold absorption process. The effluent, which contains olefinic hydrocarbons and hydrogen is compressed, cooled and contacted with a liquid absorbent. ... | 05/09/1995 |
| 5403469 | Process for producing FCC feed and middle distillate Hydrotreated and hydrocracked liquid/vapor effluents are separated in a common separating vessel under elevated pressure. High quality middle distillates and low-sulfur/low-hydrogen-containing FCC feedstocks are produced.... | 04/04/1995 |
| 5360535 | Ebullated bed process with recycle eductor In an ebullated bed process reactor effluent is subjected to high pressure followed by intermediate flash separation. An ebullation liquid is formed by educting high pressure flash separation liquid into an intermediate flash separation liquid. The ebulla... | 11/01/1994 |
| 5332492 | PSA process for improving the purity of hydrogen gas and recovery of liquefiable hydrocarbons from hydrocarbonaceous effluent streams A process for recovering hydrogen-rich gases and increasing the recovery of liquid hydrocarbon products from a hydrocarbon conversion zone effluent is improved by a particular arrangement of a refrigeration zone, a pressure swing adsorption (PSA) zone, an... | 07/26/1994 |
| 5292993 | Process for removing impurities from petroleum products The impurity content, e.g. propionitrile, in a fraction containing C5 or C6 tertiary olefins obtained by cracking hydrocarbons is reduced by distilling with an alkanol and removing the impurity as a higher boiling point fraction.... | 03/08/1994 |
| 5278344 | Integrated catalytic reforming and hydrodealkylation process for maximum recovery of benzene The present invention is an integrated catalytic reforming/hydrodealkylation process that maximizes benzene recovery by incorporating refrigeration and pressure swing adsorption separation units. In the refrigeration separation unit, liquid reformate is u... | 01/11/1994 |
| 5164070 | Hydrocracking product recovery process The recovery of distillate products from a hydrocracking process includes passing the liquid-phase portion of the reaction zone effluent into a stripping column. A naphtha sidecut stream is recovered off the stripping column and combined with the net over... | 11/17/1992 |
| 5139646 | Process for refractory compound removal in a hydrocracker recycle liquid A catalytic hydrocracking process which minimizes the fouling of the process unit with 11+ ring heavy polynuclear aromatic compounds by means of partially condensing the hydrocarbon effluent from the hydrocracking zone to produce an unconverted... | 08/18/1992 |
| 5139644 | Process for refractory compound conversion in a hydrocracker recycle liquid The present invention is a catalytic hydrocracking process which minimizes the fouling of the process unit with 11+ ring heavy polynuclear aromatic compounds by means of hydrogenating and converting at least a portion or slipstream of the hydr... | 08/18/1992 |
| 5139647 | Process for preparing low pour middle distillates and lube oil using a catalyst containing a silicoaluminophosphate molecular sieve The present invention relates to a hydrocracking and isomerization process for preparing low pour point middle distillate hydrocarbons and lube oil from a hydrocarbonaceous feedstock boiling above about 600° F. by contacting the feedstock with a catalyst... | 08/18/1992 |
| 5120427 | High conversion high vaporization hydrocracking process Potential problems associated with the formation of polynuclear aromatic compounds during hydrocracking of residual oils are eliminated by operating at high conversion rates with a high hydrogen concentration followed by a unique separation method. The fe... | 06/09/1992 |
| 5120426 | Hydrocracking process An improved hydrocracking process, in a process for conversion of components of a heavy hydrocarbon feed to lighter, more valuable products, wherein the feed comprises foulant, the process comprising: (a.) contacting the feed with hydrogen, in the presenc... | 06/09/1992 |
| 5082551 | Hydroconversion effluent separation process A hydroconversion effluent separation process is provided. The effluent from the hydroconversion zone is passed to a hot high pressure separation zone. The gas phase from that zone is then passed to a cold high pressure separation zone while the liquid hydroca... | 01/21/1992 |
