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| Number | Title | Issue Date |
| 7638674 | Processes for the isomerization of paraffins of 5 and 6 carbon atoms with methylcyclopentane recovery In an isomerization process where the isomerization effluent (108) is fractionated in a deisohexanizer (116) to provide an overhead (118) containing dimethylbutanes and a higher boiling fraction (122) containing normal hexane, the higher ... | 12/29/2009 |
| 7638675 | Processes for the isomerization of normal butane to isobutane In a normal butane isomerization process where the isomerization effluent (108, 114) is fractionated in a deisobutanizer (116) operated such that a lower boiling fraction (118) is provided containing at least 80 mass-% isobutane and a higher boi... | 12/29/2009 |
| 7638676 | Processes for the isomerization of feedstocks comprising paraffins of 5 to 7 carbon atoms In an isomerization process where the isomerization effluent (114) is fractionated in a deisohexanizer (116) to provide a lower boiling fraction (122) containing dimethylbutanes, a higher boiling fraction containing methylpentanes and a bottoms ... | 12/29/2009 |
| 7514590 | Isomerization process with adsorptive separation Isomerization of a feedstream comprising C5 to C6 hydrocarbons involving charging hydrogen and the feedstream into an isomerization zone to contact an isomerization catalyst at isomerization conditions and increase the branching of the feedstre... | 04/07/2009 |
| 7435865 | Method for separating hydrocarbons and use of a zeolite therefor A method for separating a mixture of hydrocarbons into fractions enriched in linear, mono-branched, or multi-branched hydrocarbons is disclosed. In particular, mono-branched alkanes are separated from a mixture of alkanes containing multi-branched, mono-branched and... | 10/14/2008 |
| 7371912 | Process for making xylene isomer using a deheptanizer with a side draw recycle In processes for recovering one or more xylene isomers and isomerizing the remaining isomers for recycle, the isomerate is distilled to provide a toluene-containing overhead, a mid-boiling fraction containing C8 aromatics and a bottoms fraction containing... | 05/13/2008 |
| 7326819 | High-activity isomerization catalyst and process A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component of... | 02/05/2008 |
| 7285695 | Hydrogenation of hydrocarbon resins The invention is directed to a process for the hydrogenation of hydrocarbon resins in the presence of a precious metal catalyst, wherein the hydrogenation is performed in the additional presence of at least one metal oxide, capable of reacting with sulfide and/or ha... | 10/23/2007 |
| 7252753 | Dielectric fluids and processes for making same Dielectric fluids comprising oil fractions derived from highly paraffinic wax are provided. Further provided are processes for making these dielectric fluids comprising oil fractions derived from highly paraffinic wax. The dielectric fluids are useful as insulating ... | 08/07/2007 |
| 7226527 | Method for recovering crude 1,3-butadiene by extractive distillation from a Ccut A process for recovering crude 1,3-butadiene from a C4 fraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column to form a first subreg... | 06/05/2007 |
| 7223898 | Isomerization process A process for the isomerization of a feedstream comprising C5–C6 hydrocarbons where the process involves charging hydrogen and a feedstream comprising at least normal C5–C6 hydrocarbons into an isomerization zone and c... | 05/29/2007 |
| 7022889 | Isomerization process using novel catalyst A process for the isomerization of a feedstream comprising C5–C6 hydrocarbons where the process involves charging hydrogen and a feedstream comprising at least normal C5–C6 hydrocarbons into an isomerization zone and c... | 04/04/2006 |
| 7015175 | High-activity isomerization catalyst and process A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component of... | 03/21/2006 |
| 6979396 | Combination reforming and isomerization process A reforming and isomerization process has been developed. A reforming feedstream is charged to a reforming zone containing a reforming catalyst and operating at reforming conditions to generate a reforming zone effluent. Hydrogen and an isomerization feedstream is c... | 12/27/2005 |
| 6977322 | Isomerization catalyst and processes A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a tungstated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component ... | 12/20/2005 |
| 6927314 | Fractionation and treatment of full boiling range gasoline A process to increase the octane number of a naphtha boiling range feed stock has been developed. Using a dividing wall column, the feed stock is separated into a light fraction comprising compounds containing five carbon atoms or less, an intermediate fraction cont... | 08/09/2005 |
| 6920802 | Adsorption trap for the detection of surface-active agents in gas streams A method and apparatus are provided for adsorbing surface-active compounds, such as corrosion inhibitors and water, from pressurized gas streams utilizing existing gas pipeline sampling valves. The apparatus includes an adsorption trap assembly containing an adsorpt... | 07/26/2005 |
| 6809228 | Process combining hydroisomerisation and separation using a zeolitic adsorbent with a mixed structure for the production of high octane number gasolines For producing a gasoline stock with a high octane number, employed are at least one hydroisomerisation section and at least one section for adsorptively separating multibranched paraffins contained in a constituted by a C5 to C8 cut. The separation section contains ... | 10/26/2004 |
| 6759563 | Liquid phase adsorptive separation with hexane desorbent and paraffin isomerization A combination isomerization and liquid phase adsorptive separation process has been developed. In this arrangement, a C5+ naphtha stream is split into a heavy hydrocarbon stream comprising normal heptane and higher boiling hydrocarbons, an isomerization a... | 07/06/2004 |
| 6702937 | Process for upgrading Fischer-Tropsch products using dewaxing and hydrofinishing A process for producing low pour point diesel and lubricating base oil products by bulk dewaxing a C5 plus Fischer-Tropsch syncrude, hydrofinishing the dewaxed intermediate, and recovering 120 degrees C. plus products having improved properties... | 03/09/2004 |
| 6573417 | Fractionation of paraffin isomerization process effluent The fractional distillation performed as part of the isomerization of C5 -C6 paraffins is heat integrated. A portion of a sidedraw recycle stream is employed to cool the feed to a deisohexanizer column and then returned to a lower po... | 06/03/2003 |
| 6503465 | Two-stage isomerization of saturated C6 hydrocarbons A process and/or system is provided for isomerizing a hydrocarbon feedstock comprising saturated C6 hydrocarbons by contacting the hydrocarbon feedstock, in the presence of hydrogen and optionally a chloride, with a first isomerization catalyst... | 01/07/2003 |
| 6420618 | Premium synthetic lubricant base stock (Law734) having at least 95% noncyclic isoparaffins A premium synthetic lubricating oil base stock having a high VI and low pour point is made by hydroisomerizing a Fischer-Tropsch synthesized waxy, paraffinic feed wax and then dewaxing the hydroisomerate to form a 650-750° F.+ dewaxate. The waxy feed has... | 07/16/2002 |
| 6407303 | Isomerization process with adsorptive separation and integrated fractional distillation Construction and operational costs of simulated moving bed adsorptive separation process units are reduced by recovering desorbent from both the extract and raffinate streams of the process in a single integrated fraction column. Both streams are fraction... | 06/18/2002 |
| 6395950 | Isomerization with adsorptive separation and dividing wall fractional distillation Construction and operational costs of recovering the high-octane components of an isomerization raffinate product of a simulated moving bed adsorptive separation process units are reduced by employing a dividing wall column to perform the separation. The ... | 05/28/2002 |
| 6380452 | Isomerization process using membrane for recovery of halides A process for recovering halides from hydrocarbon containing streams is disclosed using a sulfonated hexafluro bis-A-polysulfone membrane of polymers and copolymers having the polymer repeat unit of the formula: ##STR1## in the polymer or copolymer. This ... | 04/30/2002 |
| 6353144 | Process for chromatographic separation of a C5-C8 feed or an intermediate feed into three effluents, respectively rich in straight chain, mono-branched and multi-branched paraffins For producing three effluents which are respectively rich in straight chain paraffins, in mono-branched paraffins, and in di-branched and tri-branched paraffins possibly with naphthenic and/or aromatic compounds, from C5-C8 cuts or intermediate cuts (C5-C... | 03/05/2002 |
| 6338791 | High octane number gasolines and their production using a process associating hydro-isomerization and separation The invention provides a high octane number gasoline pool comprises at least 2% of di-branched paraffins containing 7 carbon atoms, and a process for producing this gasoline pool by hydro-isomerizing a feed constituted by a C5 to C8 cut which comprises at... | 01/15/2002 |
| 6337010 | Process scheme for producing lubricating base oil with low pressure dewaxing and high pressure hydrofinishing A process for the production of a UV stable lubricating base oil from a waxy hydrocarbon feedstock comprising the steps of hydrocracking the feedstock; dewaxing the intermediate feedstock from the hydrocracking zone under low pressure; and stabilizing the... | 01/08/2002 |
| 6156950 | Process for separating a C5-C8 feed or an intermediate feed into three effluents, respectively rich in straight chain, non-branched and multi-branched paraffins For producing three effluents which are respectively rich in straight chain paraffins, in mono-branched paraffins, and in di-branched and tri-branched paraffins possibly with naphthenic and/or aromatic compounds, from C5-C8 cuts or intermediate cuts (C5-C... | 12/05/2000 |
| 6140547 | Isomerization of hydrocarbons An isomerization process for converting an isomerization feed stream containing alkanes having about 4 carbon atoms to about 10 carbon atoms per molecule and cycloalkanes having about 5 carbon atoms to about 10 carbon atoms per molecule to at least one pr... | 10/31/2000 |
| 6133496 | Two-stage isomerization of saturated C.sub. 6 hydrocarbons A process and/or system is provided for isomerizing a hydrocarbon feedstock comprising saturated C6 hydrocarbons by contacting the hydrocarbon feedstock, in the presence of hydrogen and optionally a chloride, with a first isomerization catalyst... | 10/17/2000 |
| 6118036 | Alkane isomerization using reversible flow A process to isomerize at least one normal or mono-methyl-branched alkane to form at least one multi-methyl-branched alkane has been developed. At least one normal or mono-methyl-branched is introduced to a reaction zone to form at least one multi-methyl-... | 09/12/2000 |
| 6069289 | Process for separating and recovering multimethyl-branched alkanes A process to separate multimethyl-branched alkanes from a mixture of multimethyl-branched alkanes, monomethyl-branched alkanes, and normal alkanes has been developed. The mixture is introduced to a simulated moving bed of solid adsorbent particles having ... | 05/30/2000 |
| 6008164 | Lubricant base oil having improved oxidative stability The instant invention is directed to a method for producing a lubricating base stock having a preselected oxidative stability comprising the steps of: (a) separating, into a plurality of fractions based on molecular shape, a hydroisomerized hydrocarbon wa... | 12/28/1999 |
| 6008427 | Total isomerization process with enhanced heat integration A method providing enhanced heat integration in isomerization processes having an isomerization reactor operating at a temperature less than about 232° C. (450° F.) and an adsorption zone operating at a temperature greater than about 260° C. (500° F.)... | 12/28/1999 |
| 5994607 | Paraffin isomerization process comprising fractionation having at least two draw-off levels associated with at least two isomerization zones The invention concerns a process for isomerising a feed containing essentially hydrocarbons, preferably paraffins containing principally 4 to 8, preferably princiapply to 6 and more principally 5 and/or 6 carbon atoms per molecule, comprising a fractionat... | 11/30/1999 |
| 5831140 | Isomerization process comprising fractionation having at least two draw-off levels associated with at least two isomerization zones The invention concerns a process for isomerizing a feed containing essentially hydrocarbons, preferably paraffins containing principally 4 to 8, preferably principally 4 to 6 and more preferably principally 5 and/or 6 carbon atoms per molecule, comprising... | 11/03/1998 |
| 5811630 | PSA process with reaction for reversible reactions A process is disclosed for the production of a high octane product from a feed mixture comprising C5 -C6 normal paraffins in which an equilibrium reaction to produce mono and dimethyl branched paraffins is achieved by conducting the ... | 09/22/1998 |
| 5792897 | Hydrocardon recovery from corrosive effluent stream An adsorption arrangement in combination with a catalytic hydrocarbon conversion process suspends non-hydrocarbon materials that act to enhance the operation of the conversion zone by using an adsorption zone arrangement to keep the compounds in recircula... | 08/11/1998 |
