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| Number | Title | Issue Date |
| 8017825 | Modified ETS-10 zeolites for olefin separation An as prepared Na-ETS-10 zeolite was modified by ion exchange with a mono-, di-, or tri-valent cation and mixtures thereof. Several of the modified ETS-10 zeolites showed improved pressure swing capacity during the selective adsorption of ethylene from an ethylene/e... | 09/13/2011 |
| 7396973 | Simulated moving bed adsorptive separation process for handling multiple feedstocks The present invention discloses a means to improve the production capacity and feedstock handling flexibility of a simulated moving bed adsorptive separation process by introducing a second feed stream to the adsorbent chamber, such second feed stream comprising a f... | 07/08/2008 |
| 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 |
| 7223621 | Method of fabricating an array substrate An array substrate for use in an X-ray sensing device and in an LCD device is fabricated using plasma gas treatment. Especially, an indium-tin-oxide (ITO) transparent conductive metallic layer is plasma-treated by N2 plasma, He plasma or Ar plasma, before... | 05/29/2007 |
| 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 |
| 7133100 | Method for treating surface of organic insulating film using helium plasma and method of fabricating thin film transistor substrate using the same A fabricating method of a thin film transistor substrate according to the present invention includes the steps of forming on a substrate material a thin film transistor array including a plurality of signal lines; forming an organic insulating film on the substrate ... | 11/07/2006 |
| 7128829 | Removal of impurities from liquid hydrocarbon streams A novel process effective for the removal of organic sulfur compounds, organic nitrogen compounds and light olefins from liquid hydrocarbons is disclosed. The process more specifically addresses the removal of these contaminants from aromatic compounds including ben... | 10/31/2006 |
| 7041272 | Systems and processes for providing hydrogen to fuel cells A process and system for providing a hydrogen-containing gas stream to a fuel cell anode that includes providing a hydrogen-containing gas stream that includes carbon monoxide, introducing the hydrogen-containing gas stream into a pressure swing adsorption module th... | 05/09/2006 |
| 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 |
| 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 |
| 6497812 | Conversion of C1-C3 alkanes and fischer-tropsch products to normal alpha olefins and other liquid hydrocarbons Processes for converting C1 to C3 alkanes into high purity C6 to C24 normal alpha olefins and internal combustion engine grade fuels and/or lubricating oils comprising a sequence of fractionation and thermal cra... | 12/24/2002 |
| 6492513 | Method for separating analogous organic compounds The present invention relates to a method for separating a lactone-containing high-molecular weight compound having an alkyl group as its side chain from a lactone-containing high-molecular weight compound having an alkenyl group as its side chain by usin... | 12/10/2002 |
| 6423881 | Selective adsorption of alkenes using supported metal compounds The invention provides novel adsorbents for use in the separation of unsaturated hydrocarbons from a mixture of gases containing such hydrocarbons. The preferred adsorbents comprise metal compounds supported on high surface area carriers. The adsorbents o... | 07/23/2002 |
| 6410815 | Agglomerated zeolite adsorbents, process for their preparation, and their use for adsorbing paraxylene from aromatic C8 fractions The present invention relates to agglomerated zeolite adsorbents based on faujasite with an Si/Al ratio such that 1ࣘSi/Alࣘ1.15, at least 70% exchanged with barium and optionally with potassium, and on a binder, preferably a zeolitizable binder. They a... | 06/25/2002 |
| 6395951 | Adsorptive separation product recovery by fractional distillation Construction and operational costs of recovering the extract or raffinate product of a simulated moving bed adsorptive separation process units are reduced by employing a dividing wall column to perform the separation. The raffinate or extract stream is p... | 05/28/2002 |
| 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 |
| 6225518 | Olefinic hydrocarbon separation process A molecular sieve used in a process for separating olefinic hydrocarbons from paraffinic hydrocarbons is regenerated in a method which removes diolefins and aromatic hydrocarbons from the molecular sieve. The method comprises contacting the sieve with alk... | 05/01/2001 |
| 6215037 | Method for selective adsorption of dienes The invention provides specific adsorbents and methods for separating an unsaturated hydrocarbon from a mixture containing such hydrocarbon. The adsorbents and methods are useful for separating dienes from mono-olefins.... | 04/10/2001 |
| 6166278 | Use of naturally acid smectites to remove olefins from aromatics or aromatic mixtures and processes therewith A catalyst for removing olefins from aromatic compounds or mixtures of aromatic compounds wherein the catalyst is a naturally acidic smectite clay containing exchangeable cations wherein the naturally acidic smectite clay has a cation exchange capacity of... | 12/26/2000 |
| 6124517 | Olefin purification by adsorption of acetylenics and regeneration of adsorbent Processes using heterogeneous adsorbents are disclosed for purification of relatively impure unsaturated hydrocarbons such as olefins, which are typically produced by thermal cracking of suitable hydrocarbon feedstocks, by passing a feed stream, containin... | 09/26/2000 |
| 6106702 | Olefinic hydrocarbon separation process A molecular sieve guard bed used in an adsorptive process for separating olefinic hydrocarbons from paraffinic hydrocarbons is regenerated in a method which recovers valuable hydrocarbons from the guard bed void volumes. The method comprises first contact... | 08/22/2000 |
| 6080905 | Olefin purification by adsorption of acetylenics and regeneration of adsorbent Processes using heterogeneous adsorbents are disclosed for purification of olefins such as are typically produced by thermal cracking of suitable hydrocarbon feedstocks, by passing a stream of olefin having from 2 to about 8 carbon atoms, containing acety... | 06/27/2000 |
| 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 |
| 6060032 | Layered adsorbent bed for carbon monoxide production A process is set forth for the production of a carbon monoxide stream from a feed stream comprising carbon monoxide, hydrogen, carbon dioxide, methane, nitrogen and moisture. The process comprises contacting the feed stream at elevated pressure with a lay... | 05/09/2000 |
| 5912395 | Raffinate line flush in simulated continuous moving bed adsorptive separation process The capacity of a simulated moving bed adsorptive separation process is increased by flushing the contents of the transfer line just previously used to remove the raffinate stream from the adsorbent chamber back into the adsorbent chamber. This step is pe... | 06/15/1999 |
| 5863315 | Process for the separation of isoalkanes/n-alkanes by gas phase adsorption using a pressure swing and four adsorbers Four adsorbers 1 to 4, each operating in a cycle comprising (described for adsorber 2): an adsorption step 1 wherein a feed from adsorber 2 is circulated to adsorber 2; an adsorption step 2 wherein feed is injected to the bottom of adsorber 2 and a produc... | 01/26/1999 |
| 5744687 | Process for recovering alkenes from cracked hydrocarbon streams A hydrocarbon stream is cracked to produce a hot gaseous stream which is compressed and cooled to condense almost all of the hydrocarbons contained in the stream. A noncondensed stream remaining after the condensation step, comprised predominantly of hydr... | 04/28/1998 |
| 5488185 | Process for the production of ethanol and isopropanol An ethene stream which contains ethane as an impurity or a propene stream which contains propane as an impurity is hydrated with water vapor in the presence of a hydration catalyst to produce ethanol or isopropanol, respectively. After removal of the alco... | 01/30/1996 |
| 5442040 | Extraction of selection hydrocarbons from a hydrocarbon stream using a carbon adsorbent The present invention is directed to adsorbing polymeric hydrocarbons (ie. polymers of iso-butylene, polymers of the isomers of iso-butylene (poly-butenes) and co-polymers of iso-butylene and other olefins (butyl rubber) from hydrocarbon or raffinate stre... | 08/15/1995 |
| 5365011 | Method of producing unsaturated hydrocarbons and separating the same from saturated hydrocarbons Method of separating a gaseous alkene from a gaseous alkane by a pressure swing adsorption process unit alone or in combination with the distillation column wherein the alkene is preferentially adsorbed onto a bed of 4A zeolite at a temperature of about 5... | 11/15/1994 |
| 5322927 | Method for producing polymers Polyolefins are produced by a process which includes the steps of: polymerizing an olefin in a reaction zone; removing unreacted olefin from the polymer in a flash chamber and recycling the unreacted olefin to the reaction zone; stripping unreacted olefin... | 06/21/1994 |
| 5276246 | Process for separating normal olefins from non-normal olefins A chromatographic process for separating normal olefins from mixtures with branched-chain olefins with a high silica zeolitic molecular sieve, e.g., silicalites, ZSM-5, etc., having low acid catalytic reactivity, which selectively adsorbs the normal olefi... | 01/04/1994 |
| 5258571 | Separations using highly dispersed cuprous compositions The present invention is directed to a process for adsorptive separation of carbon monoxide or olefins from gas mixtures using adsorbents, which comprise cuprous compounds dispersed on amorphous oxide or carbon macroporous supports. The compositions are p... | 11/02/1993 |
| 5245099 | PSA process for recovery or ethylene A process is provided for the concentration and recovery of ethylene and heavier components from a hydrocarbon feedstream. A pressure swing adsorption (PSA) process is used to remove from hydrocarbon feedstream light cut comprising hydrogen, carbon monoxi... | 09/14/1993 |
| 5227567 | Separation process for the product streams resulting from the dehydrogenation of hydrocarbons A process for the separation and recovery of the product stream resulting from the dehydrogenation of dehydrogenatable hydrocarbons which process utilizes a chiller system for the recovery of olefin product liquid and a pressure swing adsorption unit to c... | 07/13/1993 |
| 5220102 | Process for separating normal olefins from non-normal olefins A chromatographic process for separating linear olefins from mixtures with branched-chain olefins with a high silica zeolitic molecular sieve, e.g., silicalites, ZSM-5, etc., having low acid catalytic reactivity, which selectively adsorbs the normal olefi... | 06/15/1993 |
| 5220099 | Purification of a hydrocarbon feedstock using a zeolite adsorbent A process for purifying linear paraffins in which a hydrocarbon stream containing linear paraffins contaminated with aromatics, sulfur-, nitrogen-, and oxygen-containing compounds, and color bodies, but essentially free of olefins, is contacted with a zeo... | 06/15/1993 |
| 5132485 | Adsorptive separation of alpha-olefins and internal olefins A process using zeolites, or molecular sieves, for separating an alpha-olefin having five or more carbons and the corresponding internal olefin or olefins. A mixture containing the alpha-olefin and one or more of the corresponding internal olefins is cont... | 07/21/1992 |
| 4864071 | Process for separation of unsaturated hydrocarbon from gas mixture A solid adsorbent for an unsaturated hydrocarbon comprising (a) (i) a silver or copper(I) halide or (ii) a silver or copper(I) halide and the halide of a bivalent metal, or (iii) a silver or copper(I) halide and an aluminum halide, and (b) polystyrene or ... | 09/05/1989 |
