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| Number | Title | Issue Date |
| 7396966 | Olefinic feedstock treatment processes Aromatic by-products are sorbed from mono-olefin-containing feedstocks of olefins having from about 6 to 22 carbon atoms per molecule that contain aromatic by-products having from 7 to 22 carbon atoms per molecule. A benzene-containing regenerant displaces and desor... | 07/08/2008 |
| 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 |
| 7368618 | Process for removal of oxygenates from a paraffin stream The present invention comprises a process for removal of oxygenates from a paraffin-rich or olefin-rich paraffin stream which comprises passing a feed stream, comprising one or more C10 to C15 feed paraffins or C10 to C15 ... | 05/06/2008 |
| 7335802 | Methods of preparing branched aliphatic alcohols Systems and methods to produced branched aliphatic alcohols are described. Systems may include a dehydrogenation-isomerization unit, an olefin dimerization unit, an olefin isomerization unit, a hydroformylation unit, a dehydrogenation unit, a hydrogenation unit and/... | 02/26/2008 |
| 7332640 | Light hydrocarbon separation using 8-member ring zeolites The present invention is related to a method for kinetically separating a light hydrocarbon mixture comprising at least two components by preferentially adsorbing a first component on a zeolite adsorbent comprising 8-member rings of tetrahedra as the pore opening co... | 02/19/2008 |
| 7326821 | Removal of oxygenate from an olefin stream This invention is to a process for removing dimethyl ether from an olefin stream. The process includes contacting the olefin stream with a molecular sieve that has improved capacity to adsorb the dimethyl ether from the olefin stream. The molecular sieve used to rem... | 02/05/2008 |
| 7301064 | Ethylbenzene conversion and xylene isomerization processes and catalysts therefor Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene ... | 11/27/2007 |
| 7208651 | Product recovery from simulated-moving-bed adsorption Product purity from or capacity of a simulated-moving-bed adsorptive separation process is increased by flushing the contents of the transfer line previously used to remove the raffinate stream away from the adsorbent chamber, preferably into the raffinate column us... | 04/24/2007 |
| 7186328 | Process for the regeneration of an adsorbent bed containing sulfur oxidated compounds A process for the cyclical regeneration of an adsorbent bed containing sulfur-oxidated compounds. The adsorbent bed is used to adsorb and separate sulfur-oxidated compounds from a hydrocarbonaceous stream to produce an adsorbent having adsorbed sulfur-oxidated compo... | 03/06/2007 |
| 7148392 | Separation of 1-butene from Cfeed streams In a process for selectively separating 1-butene from a C4 feed stream comprising at least 1-butene, cis-2-butene and trans-2-butene, the feed stream is passed through a first bed of an adsorbent comprising a crystalline microporous material to form a sub... | 12/12/2006 |
| 7102044 | Process for removal of oxygenates from a paraffin stream The present invention comprises a process for removal of oxygenates from a paraffin-rich or olefin-rich paraffin stream which comprises passing a feed stream, comprising one or more C10 to C15 feed paraffins or C10 to C15 ... | 09/05/2006 |
| 7074324 | Process to remove sulfur contaminants from hydrocarbon streams A process for removing sulfur compounds from hydrocarbon streams by contacting the hydrocarbon stream, especially a gasoline stream, with an adsorbent material. The adsorbent material is regenerated with hydrogen or a hydrogen/H2S mixture. ... | 07/11/2006 |
| 7013844 | Onboard fuel separation apparatus for an automobile A fuel separation apparatus includes a fuel tank storing the material fuel fed to a separation membrane, a fuel tank storing a separated low-octane fuel, and a fuel tank storing a separated high-octane fuel. An electronic control unit of the separation apparatus cal... | 03/21/2006 |
| 6984765 | Separation of methanol, ethanol and/or dimethyl ether from hydrocarbon mixtures The present invention is a separation process for producing a methanol, ethanol and/or dimethyl ether stream from a first stream containing C3+ hydrocarbons. The first stream comprises C3+ hydrocarbons, methanol, ethanol and/or dimethyl ether. ... | 01/10/2006 |
| 6924406 | Process for separating mixtures of hydrocarbon isomers in gas phase on molecular sieves A process for separating mixtures of hydrocarbon isomers on molecular sieves, including providing columns which include molecular sieves and function alternatively as secondary adsorption, primary adsorption, and desorption devices, feeding the mixtures of hydrocarb... | 08/02/2005 |
| 6911569 | Sulfur resistant adsorbents Sulfur resistant/tolerant adsorbents useful for separating olefins from paraffins in a cracked gas stream including hydrogen sulfide. The method comprises the steps of contacting the gaseous mixture with an adsorbent which preferentially adsorbs the alkene, at a sel... | 06/28/2005 |
| 6900366 | Process for upgrading of Fischer-Tropsch products A process for treating nitrogen-containing, substantially paraffinic product derived from a Fischer-Tropsch process. The substantially paraffinic product is purified in a purification process to lower the concentration of oxygen, nitrogen, and other impurities. The ... | 05/31/2005 |
| 6888039 | Purification process A process of reducing the sulfur content of gasoline product comprising at least three concurrent steps: a) passing input fluid comprising pollutant through at least one adsorber to produce a polluted adsorber and a purified fluid stream which leaves the adsorber, s... | 05/03/2005 |
| 6870073 | Process for separating normal paraffins from hydrocarbons and applications for the separated hydrocarbons There is provided with a process for separating normal paraffins from hydrocarbons of C5-10 using zeolite molecular sieve 5A, which comprises the steps of (a) selective adsorption (b) cocurrent purge (c) countercurrent desorption. The present proce... | 03/22/2005 |
| 6843907 | Process for removal of carbonyl sulfide from hydrocarbons The invention comprises a process for removal of carbonyl sulfide from a hydrocarbon, which comprises contacting a hydrocarbon stream containing carbonyl sulfide with an adsorbent and then regenerating the adsorbent by passing a heated gas, containing a hydrolyzing ... | 01/18/2005 |
| 6784334 | Process for separating multibranched paraffins using a zeolitic adsorbent with a mixed structure A process for separating multibranched paraffins comprised in a hydrocarbon feed comprising hydrocarbons containing 5 to 8 carbon atoms per molecule comprises a separation unit functioning by adsorption and contains at least one zeolitic adsorbent with a mixed struc... | 08/31/2004 |
| 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 |
| 6689929 | Process for the production of para-xylene using toluene feeds and pressure swing adsorption A pressure swing adsorption process to separate para-xylene and ethylbenzene from a C8 aromatics stream produced by toluene conversion uses a para-selective adsorbent, preferably a non-acidic, medium pore molecular sieve of the MFI structure ty... | 02/10/2004 |
| 6680419 | Process enhancing adsorbent capacity for acetylenic compounds Processes using heterogeneous adsorbents are disclosed for purification of olefins such as are typically produced by thermal cracking of suitable hydrocarbon feedstocks, by providing a impure mixture comprising at least one olefin of from 2 to about 8 car... | 01/20/2004 |
| 6670519 | Monomethyl paraffin adsorptive separation process The amount of the adsorbent needed to recover a set quantity of monomethyl branched C10 -C15 paraffins from a mixture comprising normal paraffins and other nonnormal hydrocarbons such as di-isoparaffins, di-isoolefins, naphthenes and... | 12/30/2003 |
| 6649043 | Regeneration of hydrogen sulfide sorbents A process to regenerate metal oxide desulfurization sorbents using an oxidizing and reducing atmosphere. The sorbents may be mono- or multi-metallic in nature, and preferably comprise Cu, Ni and/or Co. If desired, secondary metals may be incorporated to i... | 11/18/2003 |
| 6635795 | Desulfurization with improved sorbent regeneration While contacting under regeneration conditions an oxygen-containing stream with a sorbent comprising a promoter metal and zinc sulfide which has been sulfurized by contact with sulfur-containing hydrocarbons such as cracked-gasolines and diesel fuel, the ... | 10/21/2003 |
| 6627783 | Pressure swing adsorption process for separating para-xylene and ethylbenzene from mixed C8 aromatics A pressure swing adsorption process to separate para-xylene and ethylbenzene from C8 aromatics uses a para-selective adsorbent, preferably a non-acidic, medium pore molecular sieve of the MFI structure type, and is operated isothermally in the ... | 09/30/2003 |
| 6617481 | Process for producing phenyl-alkanes using an adsorptive separation section The present invention is a process for producing phenyl-alkanes by paraffin adsorptive separation followed by paraffin dehydrogenation and then by alkylation of a phenyl compound by a lightly branched olefin. The adsorptive separation step employs a silic... | 09/09/2003 |
| 6573418 | Process for production of para-xylene incorporating pressure swing adsorption and simulated moving bed adsorption A pressure swing adsorption process to separate para-xylene and ethylbenzene from C8 aromatics which uses a para-selective, non-acidic, medium pore molecular sieve of the MFI structure type and is operated isothermally in the vapor phase at ele... | 06/03/2003 |
| 6544410 | Desulfurization with improved sorbent regeneration During the regeneration of a sulfurized sorbent comprising zinc aluminate, a promoter metal and zinc sulfide by contact with an oxygen-containing stream to convert at least a portion of said zinc sulfide to zinc oxide the average sulfur dioxide partial pr... | 04/08/2003 |
| 6486375 | Process for recovering hydrocarbons from inert gas-hydrocarbon vapor mixtures An improved process for recovering hydrocarbons from an inlet inert gas-hydrocarbon vapor mixture is provided. The inlet mixture is caused to flow through a first bed of solid adsorbent whereby hydrocarbon vapors are adsorbed on the bed and a residue gas ... | 11/26/2002 |
| 6483002 | Integrated fractional distillation for adsorptive separation process 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 column. Both streams are fractionated to recover deso... | 11/19/2002 |
| 6482316 | Adsorption process for producing ultra low hydrocarbon streams The instant invention is directed to a method for reducing the amount of sulfur in hydrocarbon streams comprising the steps of: (a) contacting a hydrocarbon stream comprising hydrocarbons and sulfur compounds with an adsorbent selective for adsorption of said ... | 11/19/2002 |
| 6428685 | Desulfurization and novel sorbents for same Particulate sorbent compositions which are suitable for the removal of sulfur from streams of cracked-gasoline or diesel fuel are provided which have increased porosity, improved resistance to deactivation through the addition of a calcium compound select... | 08/06/2002 |
| 6407305 | Adsorptive separation process for recovery of two paraffin products Two separate paraffinic hydrocarbon products, such as normal and monomethyl branched C10 -C23 paraffins, are recovered from a mixture comprising the product hydrocarbons and many other hydrocarbons in a process employing two adsorpti... | 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 |
| 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 |
| 6348636 | Purification of polymeric dispersions by stripping in the presence of adsorbent materials The present invention relates to methods for removing VOCs from an aqueous polymer dispersion (e.g., an SBR latex) in which the dispersion is contacted with a stripping medium in the presence of a particulate adsorbent such as activated carbon. This proce... | 02/19/2002 |
| 6252127 | Process for monomethyl acyclic hydrocarbon adsorptive separation Monomethyl branched C10 -C15 paraffins or olefins are recovered from a mixture comprising other nonnormal hydrocarbons such as di-isoparaffins, di-isoolefins and aromatics by adsorptive separation in a process which uses an adsorbent... | 06/26/2001 |
