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| Number | Title | Issue Date |
| 7320745 | Energy efficient method for exothermic reactions An energy efficient process scheme for a highly exothermic reaction-distillation system in which the reactor is external to the distillation column and the feed to the reactor is a mixture of at least one liquid product stream from the distillation column with or wi... | 01/22/2008 |
| 6660812 | Production of olefin derivatives Disclosed is a system of making an olefin derivative from a dilute olefin feed. Dilute olefin is sent to an olefin reaction unit to form an olefin derivative product. The olefin derivative product is recovered from the reaction unit while a vent stream is... | 12/09/2003 |
| 6281398 | Process for the production of high octane number gasolines A process is disclosed for improving the yield in the production of high octane gasoline after naphtha reforming by utilizing a transalkylation step to upgrade the heavy and light fractions coming from the reforming step.... | 08/28/2001 |
| 6217749 | Process for hydrotreating a hydrocarbon feedstock and apparatus for carrying out same A process for hydrotreating a hydrocarbon feedstock (1) involving the use of at least one hydrotreatment, particularly hydrodesulfurization, reactor (2) and a fractionation unit (3), which latter contains two distinct injection zones (4, 5) for the hydroc... | 04/17/2001 |
| 6140546 | Hydrocarbon dehydrocyclization process In a process for the dehydrocyclization of a dehydrocyclizable hydrocarbon contained in a dehydrocyclization feed stream which comprises contacting said dehydrocyclizable hydrocarbon in a dehydrocyclization zone under dehydrocyclization conditions in the ... | 10/31/2000 |
| 6126812 | Gasoline upgrade with split feed A method for optimizing the yield of aromatics and light olefins in a process for the conversion of cracked gasoline to aromatics and light olefins by separating the cracked gasoline into a light fraction and a heavy fraction and contacting the light frac... | 10/03/2000 |
| 6118037 | Process for the removal of contaminant compounds containing one or more heteroatoms of sulfur, nitrogen and/or oxygen from hydrocarbon streams Process for the removal of contaminant compounds containing one or more heteroatoms of sulfur, nitrogen and/or oxygen from hydrocarbon streams characterized in that it comprises: an adsorption step in which said compounds are adsorbed by means of an adsor... | 09/12/2000 |
| 6083379 | Process for desulfurizing and aromatizing hydrocarbons A process for desulfurizing and enhancing the octane of cracked gasoline by first aromatizing the cracked gasoline and, second, hydrodesulfurizing the resulting intermediate product stream.... | 07/04/2000 |
| 6051128 | Split-feed two-stage parallel aromatization for maximum para-xylene yield A full boiling hydrocarbon feed is reformed to enhance para-xylene and benzene yields. First, the hydrocarbon feed is separated into a C5- cut, a C6 -C7 cut, and a C8+ cut. The C6 -C7 cut ... | 04/18/2000 |
| 5925237 | Method for inhibiting the rate of coke formation during the zeolite catalyzed aromatization of hydrocarbons The rate of coke formation during the aromatization of gasoline boiling range hydrocarbons in which the hydrocarbons are contacted with a zeolite catalyst is significantly reduced by providing a concentration of a silyating agent in the hydrocarbon feed.... | 07/20/1999 |
| 5922923 | Zeolitic reforming with selective feed-species adjustment The feedstock to an aromatization process is processed by a selective adsorption step to remove hydrocarbon species, particularly indan, which have a severe adverse effect on aromatization catalyst stability. The feedstock preferably is a paraffinic raffi... | 07/13/1999 |
| 5877368 | Method for producing aromatic hydrocarbons Disclosed is a method for producing aromatic hydrocarbons, which comprises contacting a light hydrocarbon feedstock comprising olefins and/or paraffins with a zeolite catalyst in a fixed-bed, adiabatic reactor containing a fixed catalyst bed comprised of ... | 03/02/1999 |
| 5877367 | Dehydrocyclization process with downstream dimethylbutane removal In the present invention, dimethylbutanes are removed from the raffinate component of the feed to a dehydrocyclization process. Thus, according to a preferred embodiment, a process is provided for producing aromatics by the following steps: (a) contacting... | 03/02/1999 |
| 5800696 | Method for inhibiting the rate of coke formation during the zeolite catalyzed aromatization of hydrocarbons The rate of coke formation during the aromatization of gasoline boiling range hydrocarbons in which the hydrocarbons are contacted with a zeolite catalyst is significantly reduced by providing a concentration of a silylating agent in the hydrocarbon feed.... | 09/01/1998 |
| 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 |
| 5386071 | Process for producing aromatics from a C5 /C6 feedstream This invention relates to a process for convening C5 /C6 hydrocarbons to aromatic products, e.g., benzene, toluene, etc. The process involves first flowing the C5 /C6 feedstream to a first reaction zone where th... | 01/31/1995 |
| 5258563 | Process for the production of benzene from light hydrocarbons A process is disclosed for the conversion of light aliphatic hydrocarbons such as propane into aromatic hydrocarbons and especially high purity benzene. The feed hydrocarbon is converted to aromatic hydrocarbons in a dehydrocyclodimerization zone. The pro... | 11/02/1993 |
| 5186908 | Increased conversion of C2 -C12 aliphatic hydrocarbons to aromatic hydrocarbons using a highly purified recycle stream An improved aromatization apparatus is disclosed in which conversion is increased by recycling a highly purified C2 -C4 aliphatic stream. Loss of valuable ethane to fuel gas is substantially eliminated. In a preferred embodiment, a d... | 02/16/1993 |
| 5177279 | Integrated process for converting methanol to gasoline and distillates An integrated process for the conversion of methanol feed to gasoline and distillate range liquid hydrocarbons comprising the steps of splitting the methanol feed into two portions, contacting the first portion of the methanol feed with a medium-pore shap... | 01/05/1993 |
| 5110446 | Integrated products separation from fluid catalytic cracking and aromatization processes The present invention provides a process for decreasing the energy consumption of a catalytic cracking process product recovery section while improving gasoline yield by integrating multistage vapor compression and product recovery with deacidification an... | 05/05/1992 |
| 4996381 | Increased conversion of C2 -C12 aliphatic hydrocarbons to aromatic hydrocarbons using a highly purified recycle stream An improved aromatization process is disclosed in which conversion is increased by recycling a highly purified C2 -C4 aliphatic stream. Loss of valuable ethane to fuel gas is substantially eliminated. In a preferred embodiment, a dep... | 02/26/1991 |
| 4985203 | Conversion system for converting oxygenates to hydrocarbons Aliphatic oxygenates are converted to high octane gasoline by an integrated reactor system wherein three reaction zones are utilized. In a first reaction zone the oxygenates are directly converted to gasoline and an isobutane by-product. In a second react... | 01/15/1991 |
| 4936976 | Integrated reforming/aromatization process An integrated reforming/aromatization process is disclosed which improves the octane number and C5 + liquid yield of a catalytic reforming unit by integrating a catalytic aromatization zone into a catalytic reforming unit gas plant fractionator... | 06/26/1990 |
| 4929334 | Fluid-bed reaction process An improved fluid-bed reaction process and apparatus are disclosed in which feedstock is preheated and may be at least partially converted by contacting the feedstock with spent catalyst in a preheat zone. Additional benefits include a reduction in cataly... | 05/29/1990 |
| 4867864 | Dehydrogenation, dehydrocyclization and reforming catalyst The invention relates to catalytic treatment of paraffin feeds to alter the hydrogen content of the feed, for example, by producing effluents the aromatic content of which exceeds that of the feed in which the catalyst is a non-acidic composition containi... | 09/19/1989 |
| 4832919 | Olefin fractionation and catalytic conversion system with heat exchange means A heat balanced system for converting an olefinic feedstock comprising ethylene and C3+ olefins to heavier liquid hydrocarbon product in a catalytic exothermic process. Means are provided for prefractionating the olefinic feedstock t... | 05/23/1989 |
| 4783566 | Hydrocarbon conversion process A hydrocarbon conversion process is disclosed which extends the useful life of a regenerable zeolite-containing hydrocarbon conversion catalyst. In one aspect of this process, a hydrocarbon feed containing fluorides is passed through a fluoride removal sy... | 11/08/1988 |
| 4749820 | Integration of paraffin dehydrogenation with MOGD to minimize compression and gas plant separation Disclosed is a method and apparatus for producing gasoline and distillate grade products which employs integrating catalytic (or thermal) dehydrogenation of paraffins with MOGD to minimize interstage compression and gas plant separation cost. The process ... | 06/07/1988 |
| 4675461 | Conversion of LPG hydrocarbons into distillate fuels using an integral LPG dehydrogenation-MOGD process Disclosed is a method and apparatus for conversion of LPG hydrocarbons into distillate fuels by integrating LPG dehydrogenation with catalytic oligomerization and recovering the distillates produced. The described method and apparatus may comprise an H | 06/23/1987 |
| 4654453 | Process for converting oxygenates to hydrocarbons Aliphatic oxygenates are converted to high octane gasoline by an integrated process wherein three reaction zones are utilized. In a first reaction zone the oxygenates are directly converted to gasoline and an isobutane by-product. In a second reaction zon... | 03/31/1987 |
| 4528412 | Dehydrocyclodimerization process A hydrocarbon conversion process for the production of C6 -C8 aromatic hydrocarbons from C3 and C4 aliphatic hydrocarbons is disclosed. This dehydrocyclodimerization process is characterized by the integrated pr... | 07/09/1985 |
| 4497968 | Multistage process for converting olefins or oxygenates to heavier hydrocarbons A multistage technique for converting olefins to heavier hydrocarbons including a sorption prefractionation unit for separating olefinic feedstock into a sorbate stream rich in liquified olefins and a vapor stream rich in light olefins; a first stage cata... | 02/05/1985 |
| 4456779 | Catalytic conversion of olefins to higher hydrocarbons An improved continuous process for converting lower olefinic hydrocarbon feedstock to C5+ liquid hydrocarbons by contacting vapor phase olefinic feedstream with acid zeolite catalyst in the presence of recycled diluent stream rich i... | 06/26/1984 |
| 4450311 | Heat exchange technique for olefin fractionation and catalytic conversion system A heat balanced technique for converting an olefinic feedstock comprising ethylene and C3+ olefins to heavier liquid hydrocarbon product in a catalytic exothermic process. Methods and means are provided for prefractionating the olefi... | 05/22/1984 |
| 4358362 | Method for enhancing catalytic activity A hydrocarbon feed for use in a catalytic conversion process that utilizes a zeolite catalyst, and that contains a catalytically deleterious impurity, is refined by contact with a zeolitic sorbent. The invention is applicable to dewaxing, with an example ... | 11/09/1982 |
| 4169865 | Production of aromatic hydrocarbons A process for the dimerization and cyclization of isobutene to form, as preferred product, paraxylene in which the whole of the product of isobutene dimerization (including unreacted feedstock) is contacted with a catalyst for the cyclization of the isobu... | 10/02/1979 |
| 4167472 | Hydrocarbon treating process A process for treating a hydrocarbon composition containing both straight chain and non-straight chain hydrocarbons in which said hydrocarbon composition is separated into a straight chain hydrocarbon-rich fraction and a non-straight chain hydrocarbon-ric... | 09/11/1979 |
| 4166830 | Diacritic cracking of hydrocarbon feeds for selective production of ethylene and synthesis gas A continuous process for the selective production of ethylene by the diacritic cracking of heavy hydrocarbon feeds such as residual oils, heavy vacuum gas oils, atmospheric gas oils, crude oils and coal-derived liquids. The diacritic cracking takes place ... | 09/04/1979 |
| 4157355 | Combination process for selected aromatic hydrocarbon production Selected aromatic hydrocarbon concentrates--benzene, mixed xylenes, etc.--are produced by way of a combination process which involves catalytic reforming followed by hot flash separation and dealkylation of the separated hot flash liquid phase. Although t... | 06/05/1979 |
| 4146465 | Addition of olefins to cat cracker feed to modify product selectivity and quality A process for increasing the octane rating of gasoline and decreasing the quantity of coke produced by a catalytic cracking process by adding C2 to C6 linear olefins to the feed to the reactor with a zeolite containing cracking catal... | 03/27/1979 |
