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| Number | Title | Issue Date |
| 7419586 | Two-stage hydrodesulfurization of cracked naphtha streams with light naphtha bypass or removal A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically-bound sulfur and olefins. The olefinic naphtha stream is selectively desulfurized in a first hydrodesulfurization stage. The effluent stream f... | 09/02/2008 |
| 7368617 | Selective hydrogenation of acetylenes and dienes in a hydrocarbon stream Acetylenes and dienes in a stream containing hydrogen, methane, C2-C6 olefins and paraffins, C2-C6 acetylenes and dienes, benzene, toluene, xylenes, and other C6+ components are hydrogenated in a downflow boilin... | 05/06/2008 |
| 7351327 | Process for the selective desulfurization of a mid range gasoline cut A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and... | 04/01/2008 |
| 7344635 | Integral method for desulphurization of a hydrocarbon cracking or stream cracking effluent Process for desulfurization of an effluent for cracking or steam-cracking hydrocarbons, more particularly a gasoline for example for catalytic cracking that comprises the elimination of thiophenic compounds by alkylation of these compounds, followed by a distillatio... | 03/18/2008 |
| 7291258 | HDS process using selected naphtha streams A process for concurrently fractionating and hydrotreating a full range naphtha stream. The full boiling range naphtha stream is subjected to simultaneous hydrodesulfurization and splitting into a light boiling range naphtha and a heavy boiling range naphtha, which ... | 11/06/2007 |
| 7288181 | Producing low sulfur naphtha products through improved olefin isomerization The instant invention relates to a process to produce high octane, low sulfur naphtha products through the removal of basic nitrogen-containing compounds with subsequent skeletal isomerization of feed olefins and hydrotreating. ... | 10/30/2007 |
| 7276151 | Gas turbine fuel oil and production method thereof and power generation method Feed oil is subject to atmospheric distillation, to thereby be separated into light oil or light distillate and atmospheric residue oil. The light distillate is catalytically contacted with pressurized hydrogen in the presence of a catalyst, resulting in a first hyd... | 10/02/2007 |
| 7276150 | Method of desulfurizing gas oil fraction, desulfurized gas oil, and desulfurizer for gas oil fraction The process for desulfurizing a gas oil fraction according to the invention comprises a low-boiling gas oil fraction hydrodesulfurization step (I) wherein a low-boiling gas oil fraction is desulsurized under the condition of a H2/Oil ratio of 70 to 200 Nm... | 10/02/2007 |
| 7261809 | Process for ultra low sulfur gasoline A process for removing organic sulfur compounds from heavy boiling range naphtha in a dual purpose reactor wherein the heavy boiling range naphtha is fed downflow over a fixed bed of hydrodesulfurization zone and then treated with hydrogen in a hydrodesulfurization ... | 08/28/2007 |
| 7244352 | Selective hydroprocessing and mercaptan removal A process for producing a naphtha having a decreased amount of sulfur by selective hydroprocessing a petroleum feedstream comprising cracked naphtha to reduce its sulfur content with minimum loss of octane. The reduced sulfur naphtha stream contains mercaptan sulfur... | 07/17/2007 |
| 7153415 | Process for the treatment of light naphtha hydrocarbon streams A light cracked naphtha is treated to convert mercaptans to sulfides and saturate dienes and then subjected to destructive hydrodesulfurization (HDS) to convert the organic sulfur compounds to hydrogen sulfide. The recombinant mercaptans formed by reaction of hydrog... | 12/26/2006 |
| 7125484 | Downflow process for hydrotreating naphtha A process for the treatment of light naphtha hydrocarbon streams is disclosed wherein the mercaptans contained therein are reacted with diolefins simultaneous with fractionation into a light stream and a heavy stream. The heavy stream is then simultaneously treated ... | 10/24/2006 |
| 7090767 | Hydrodesulfurization of gasoline fractions A method for processing a gasoline range hydrocarbon stream wherein a single reactor/distillation tower stream is fractionated into a light fraction and a heavy fraction, the light fraction is hydrodesulfurized, the heavy fraction is optionally hydrocracked and then... | 08/15/2006 |
| 7090766 | Process for ultra low sulfur gasoline A process wherein all of the unsaturates within a cracked naphtha stream are substantially hydrogenated to alkanes and the olefin depleted stream is then subjected to hydrodesulfurization to achieve the desired sulfur levels without the formation of recombinant merc... | 08/15/2006 |
| 7074735 | Selectively suppressing catalytic hydrogenation The hydrogenation activity of a heteroatom removal catalyst, having activity for both heteroatom removal and hydrogenation, is selectively suppressed by a treatment which comprises contacting the catalyst with (i) hydrogen, (ii) a selectively deactivating agent that... | 07/11/2006 |
| 7029573 | Composition and control method for treating hydrocarbon The invention relates to a composition and method for treating liquid hydrocarbons in order to remove acidic impurities, such as mercaptans, particularly mercaptans having a molecular weight of about C4 (C4H10S=90 g/mole) and higher,... | 04/18/2006 |
| 7014751 | Continuous liquid hydrocarbon treatment method The invention relates to a method for treating and upgrading a hydrocarbon containing acidic species such as mercaptans, comprising: (a) contacting the hydrocarbon, in the essential absence of oxygen, with a first phase of a treatment composition containing w... | 03/21/2006 |
| 6972086 | Process comprising two gasoline hydrodesulfurization stages and intermediate elimination of H2S formed during the first stage The invention relates to a process for the production of gasoline with a low sulfur content comprising at least three stages: a first stage in which the sulfur-containing compounds present in the gasoline are at least partially transformed into H2S and into saturate... | 12/06/2005 |
| 6960291 | Naphtha desulfurization method The invention relates to a method for desulfurizing naphtha boiling-range hydrocarbons such as cracked naphtha. More particularly, the invention relates to hydrotreating the naphtha under selective hydrotreating conditions, and then removing mercaptans from the hydr... | 11/01/2005 |
| 6946068 | Process for desulfurization of cracked naphtha A process for concurrently fractionating and hydrotreating of a full range naphtha stream. The full boiling range naphtha stream, for example which is derived from fluid catalytic cracking, is first subjected to simultaneous hydrogenation of the thiophene contained ... | 09/20/2005 |
| 6881324 | Process for the simultaneous hydrotreating and fractionation of light naphtha hydrocarbon streams A process for the treatment of light naphtha hydrocarbon streams is disclosed wherein the mercaptans contained therein are reacted with diolefins simultaneous with fractionation into a light stream and a heavy stream. The heavy stream is then simultaneously treated ... | 04/19/2005 |
| 6824676 | Process for the selective desulfurization of a mid range gasoline cut A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and... | 11/30/2004 |
| 6755974 | Continuous naphtha treatment method The invention relates to a method for treating naphtha, such as catalytically cracked naphtha, in order to remove acidic impurities, such as mercaptans. In particular, the invention relates to a method for mercaptans having a molecular weight of about C4 ... | 06/29/2004 |
| 6736963 | Multiple stage process for removal of sulfur from components for blending of transportation fuels Economical processes are disclosed for the production of fuels of reduced sulfur content from a feedstock, typically derived from natural petroleum, wherein the feedstock is comprised of limited amounts of sulfur-containing organic compounds as unwanted impurities. ... | 05/18/2004 |
| 6733660 | Multistage process for removal of sulfur from components for blending of transportation fuels Economical processes are disclosed for the production of fuels of reduced sulfur content from a feedstock, typically derived from natural petroleum, wherein the feedstock is comprised of limited amounts of sulfur-containing organic compounds as unwanted impurities. ... | 05/11/2004 |
| 6623627 | Production of low sulfur gasoline A process for desulfurizing a gasoline stream while continuing to maintain the octane rating of the blend stock. A gasoline stream containing sulfur compounds and olefins is introduced into a fractionation zone to produce a low boiling fraction containing... | 09/23/2003 |
| 6610197 | Low-sulfur fuel and process of making The invention relates to a process for forming a low-sulfur motor gasoline and the product made therefrom. In one embodiment, process involves separating a catalytically cracked naphtha into at least a light fraction boiling below about 165° F. and a hea... | 08/26/2003 |
| 6599417 | Sulfur removal process A product of reduced sulfur content is produced from an olefin-containing hydrocarbon feedstock which includes sulfur-containing impurities. The feedstock is contacted with an olefin-modification catalyst in a reaction zone under conditions which are effe... | 07/29/2003 |
| 6596157 | Staged hydrotreating method for naphtha desulfurization The invention relates to a method and dual reactor system for hydrotreating a wide cut cat naphtha stream comprising heavy cat naphtha (HCN) and intermediate cat naphtha (ICN). Accordingly, a HCN fraction is hydrotreated under non-selective hydrotreating ... | 07/22/2003 |
| 6565741 | Process for desulfurization of petroleum distillates The desulfurization of petroleum distillates can be carried out by cyclic low-temperature adsorption of oxidized sulfur compounds with activated carbon followed by regeneration of the activated carbon using an organic solvent. The activated carbon used in... | 05/20/2003 |
| 6551502 | Process of removing sulfur compounds from gasoline A process for the removal of sulfur compounds from a hydrocarbon stream is disclosed. In a preferred embodiment, the process includes extractive distillation of a gasoline stream from a fluid catalytic cracker to reject olefins to a raffinate stream and s... | 04/22/2003 |
| 6495030 | Process for the desulfurization of FCC naphtha A process for concurrently fractionating and hydrotreating of a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and fractionation to remove the mercaptans the light fraction and then t... | 12/17/2002 |
| 6444118 | Process for sulfur reduction in naphtha streams A process for concurrently fractionating and treating of a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification or selective hydrogenation and splitting into a light boiling range naphtha, ... | 09/03/2002 |
| 6440299 | Process for removal of mercaptans from hydrocarbon streams A process for treating a light cracked naphtha to be used as an etherification feed stock is disclosed in which mercaptans, H2 S and diolefins are removed simultaneously in a distillation column reactor using a reduced nickel catalyst. The merc... | 08/27/2002 |
| 6365037 | Production process of low pour-point oil A process for producing a low pour-point oil which permits the production of a lower pour point oil without severer hydrodewaxing conditions is disclosed, which comprises hydrodewaxing a mineral oil fraction, which has been separated from a crude oil by d... | 04/02/2002 |
| 6334948 | Process for producing gasoline with a low sulphur content A process for producing a gasoline with a low sulphur content comprises: separating a sulphur-containing gasoline into a light fraction and a heavy fraction, hydrodesulphurising the light gasoline on a nickel-based catalyst, hydrodesulphurising the heavy ... | 01/01/2002 |
| 6224749 | Liquid and vapor stage hydroprocessing using once-through hydrogen A three stage hydroprocessing process includes two liquid and one vapor reaction stages, both of which produce an effluent comprising liquid and vapor. Both vapor effluents comprise vaporized hydrocarbonaceous material. Fresh hydrogen is used for the hydr... | 05/01/2001 |
| 6217748 | Process for hydrodesulfurization of diesel gas oil A process for hydrodesulfurization of a sulfur-containing petroleum hydrocarbon diesel gas oil comprising; hydrodesulfurizing a sulfur-containing petroleum hydrocarbon diesel gas oil feedstock, separating the hydrodesulfurized diesel gas oil feedstock int... | 04/17/2001 |
| 6103105 | Process for the reduction of sulphur content in FCC heavy gasoline A process for the reduction of sulphur content in a FCC gasoline includes fractionation of the FCC gasoline into three fractions: a light fraction comprising 50-80% of the FCC gasoline, an intermediate boiling fraction comprising 10-30% of the FCC gasolin... | 08/15/2000 |
| 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 |
