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| Number | Title | Issue Date |
| 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 |
| 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 |
| 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 |
| 6696615 | Method of separating polycyclic aromatic hydrocarbons by means of chromatography The invention relates to an effective method of separating polycyclic aromatic hydrocarbons by means of a chromatographic separation method. This is achieved by using, according to the invention, calixarene-modified separation phases as stationary phase f... | 02/24/2004 |
| 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 |
| 5510565 | Mercury removal from liquid hydrocarbon fraction Mercury is removed from a liquid hydrocarbon fraction by effecting high-temperature heat treatment to convert an organic mercury compound into an inorganic mercury compound or elemental mercury, removing a higher molecular weight component from the fracti... | 04/23/1996 |
| 5476985 | Process for separating linear and branched hydrocarbons using alkylene-bridged polysilsesquioxanes An adsorptive process to separate the components of a solution of linear and branched hydrocarbons into a linear hydrocarbon portion and a branched hydrocarbon portion where the adsorbent is an alkylene-bridged polysilsesquioxane has been developed. The h... | 12/19/1995 |
| 5449853 | Process for separating hydrocarbons using alkylene-bridged polysilsesquioxanes A process to separate at least two classes of hydrocarbons of a solution using an alkylene-bridged polysilsesquioxane adsorbent has been developed. The classes of hydrocarbons to be separated may be saturated hydrocarbons, unsaturated aliphatic hydrocarbo... | 09/12/1995 |
| 5414192 | Process for separating linear and branched hydrocarbons using aryl-bridged polysilsesquioxanes An adsorptive process to separate the components of a solution of linear and branched hydrocarbons into a linear hydrocarbon portion and a branched hydrocarbon portion where the adsorbent is an aryl-bridged polysilsesquioxane has been developed. The hydro... | 05/09/1995 |
| 5396020 | Process for separating hydrocarbons using aryl-bridged polysilsesquioxanes A process to separate at least two classes of hydrocarbons of a solution using an aryl-bridged polysilsesquioxane adsorbent has been developed. The classes of hydrocarbons to be separated may be saturated hydrocarbons, unsaturated aliphatic hydrocarbons a... | 03/07/1995 |
| 5338444 | Process for removing mercury from organic media which also contain arsenic Process for removing mercury from an organic medium which at least contains mercury and arsenic, wherein the organic medium is contacted with a solid polymeric substrate containing thiol groups bound to the polymeric substrate through aliphatic groups.... | 08/16/1994 |
| 5326928 | Separation of aliphatic paraffins by adsorption For the at least partial separation of aliphatic paraffins into at least one effluent comprising the least branched paraffins and at least one effluent comprising the most branched paraffins, use is made of at least one adsorbent bed comprising at least o... | 07/05/1994 |
| 5306859 | Alkylation catalyst regeneration utilizing polyvinylpyridine and amine substituted styrene divinylbenzene copolymer contact materials Described is a novel process for regenerating an ASO contaminated alkylation catalyst containing a sulfone component and a hydrogen halide component. A sulfone-containing mixture containing ASO and which is derived by the removal of a major portion of the... | 04/26/1994 |
| 5246469 | Fuel stabilization Distillate fuel is stabilized against degradation during storage by inserting into storage tanks solid materials containing polar sites to enable polar condensation of the fuel constituents active in degradation. Polyether or polyester polyurethane open c... | 09/21/1993 |
| 5120897 | Isoparaffin/olefin alkylation The present invention provides a Lewis acid-catalyzed isoparaffin/olefin alkylation process in which acid consumption and energy costs are decreased by employing an acid sorption stage to separate the Lewis acid catalyst from the alkylate product stream, ... | 06/09/1992 |
| 5101050 | Process for the production of aromatic anhydrides and aromatic esters with superior color properties A process for the production of aromatic esters or aromatic anhydrides with improved color properties is disclosed. This process comprises treating the aromatic ester or aromatic anhydride with an activated boric acid followed by fractionation.... | 03/31/1992 |
| 5076909 | Method for refining or upgrading hydrocarbons with analysis A sample of a hydrocarbon oil containing asphaltenes is chromatographically analyzed by forming a mixture of the oil with a weak solvent. The mixture is passed in contact with a column of a stationary phase of fine solid particles of fully functionalized ... | 12/31/1991 |
| 5059306 | Process for removing pure aromatics In the removal of pure aromatics from aromatic-containing hydrocarbon mixtures by liquid-phase extraction or extractive distillation using a selective solvent, the specific cost of separation can be reduced at the same yield of aromatics or the yield of a... | 10/22/1991 |
| 5049259 | Membrane process for drying liquid hydrocarbons This invention relates to a process for drying liquid hydrocarbons using cellulosic membranes.... | 09/17/1991 |
| 4990712 | Integrated cracking, etherification and olefin upgrading process Gasoline octane number and yield are improved while excess fuel gas production is decreased in a catalytic cracking process by integrating etherification and oxygenate/aliphatic upgrading processes into the catalytic cracking unit product fractionation se... | 02/05/1991 |
| 4950408 | Process for removing mercury from a non-polar organic medium The invention is concerned with a process for removing mercury from a non-polar organic medium like a liquid hydrocarbon mixture, most preferably a natural gas condensate, by contacting the medium to be treated with a solid adsorbent, preferably an ion-ex... | 08/21/1990 |
| 4816139 | Method for removing sulfur compounds from C6 and lower alkanes Small quantities of monosulfide organic compounds are removed from low boiling hydrocarbon fractions, e.g., n-hexane and lower by contacting the hydrocarbon stream with a dilute aqueous solution of NaOCl, which converts low boiling (n-hexane and lower ran... | 03/28/1989 |
| 4614729 | Supported organometallic compounds for utilization in purification of fluids Supported organometallic compounds of Groups II, III and IV of the Periodic Table are utilized for purifying fluids particularly hydrocarbon fluids, noble gases, nitrogen and hydrogen and desirable hydrocarbon solvents and olefins to remove impurities suc... | 09/30/1986 |
| 4604191 | Removal of arsenic, vanadium, and/or nickel compounds from petroliferous liquids Described is a process for removing arsenic, vanadium, and/or nickel from petroliferous derived liquids by contacting said liquid at an elevated temperature with a divinylbenzene-crosslinked polystyrene having catechol ligands anchored thereon. For vanadi... | 08/05/1986 |
| 4454366 | Method of recovering and recycling boron trifluoride catalyst Spent boron trifluoride catalyst is removed from organic liquids by contacting the liquid with polyvinyl alcohol. For example, boron trifluoride catalyst is removed from 1-olefin oligomer product by passing the liquid oligomer through a bed of granular po... | 06/12/1984 |
| 4440634 | Organic salt compositions in extraction processes Novel solid salt compositions are described containing, for example, tetraaryl and triarylaralkyl phosphonium and arsonium cations and tetraaryl and tetraaryloxy-boronates and aluminates and polyanionic metal oxide surfaces, for example, as anions. The sa... | 04/03/1984 |
| 4433197 | Removing boron trifluoride from coordination compound contaminants in organic liquids Boron trifluoride is removed from coordination compounds contaminating organic liquids by contacting the contaminated liquid with silica. For example, boron trifluoride is removed from a boron trifluoride-n-butanol coordination compound contaminating a 1-... | 02/21/1984 |
| 4422975 | Organic salt compositions in extraction processes Novel solid salt compositions are described containing, for example, tetraaryl- and triarylaralkyl-phosphonium and arsonium cations and tetraaryl- and tetraaryloxy-boranates and aluminates and polyanionic metal oxide surfaces, for example, as anions. The ... | 12/27/1983 |
| 4393266 | Separation of para-xylene Para-xylene may be separated as front-end product in high purity by contacting charge C-8 aromatic hydrocarbon mixture with certain NaY-type zeolites in the presence of a pyridine.... | 07/12/1983 |
| 4387259 | Selective alkylation of aromatic hydrocarbons using a mixed ethylene/propylene alkylation agent Aromatic hydrocarbons are selectively alkylated using an alkylating mixture containing both ethylene and propylene. By employing a zeolite ZSM-12 based alkylation catalyst, essentially only the propylene from the olefin-containing alkylation mixture will ... | 06/07/1983 |
| 4384162 | Removing boron trifluoride contaminant from organic liquids with polyvinyl alcohol Boron trifluoride contaminant is removed from organic liquids by contacting the contaminated liquid with polyvinyl alcohol. For example, boron trifluoride catalyst is removed from 1-olefin oligomer product by passing the liquid oligomer through a bed of g... | 05/17/1983 |
| 4375576 | Enhanced diisobutene production in the presence of methyl tertiary butyl ether In the liquid phase reaction of isobutene in the presence of resin cation exchange resins with itself in a C4 hydrocarbon stream to form dimers, the formation of higher polymers, oligomers, and co-dimer by-products is suppressed by the presence... | 03/01/1983 |
| 4356339 | Process for isolating and recovering butene-1 of high purity A process for isolating and recovering butene-1 of high purity at a high yield is provided. The process comprises the steps of continuously passing a butane-butene fraction containing 0.1 to 15 wt % of isobutylene and 10 to 50 wt % of butene-1 through a f... | 10/26/1982 |
| 4351981 | Separation of para-xylene Para-xylene may be separated as front-end product in high purity by contacting charge C-8 aromatic hydrocarbon mixture with NaX-type or LiX-type zeolite in the presence of a pyridine.... | 09/28/1982 |
| 4323543 | Sorption of gases Compounds of formula I are useful in the separation of a gas such as oxygen, hydrogen, sulphur dioxide, alkenes and carbon monoxide from a fluid comprising the gas. In formula I: L represents a monodentate ligand of formula IA and X is a species capable o... | 04/06/1982 |
| 4298472 | Process for manufacturing impregnated silicas and the use of these silicas for analysis or purification of industrial products Impregnated silica is manufactured by passing a substantially anhydrous solution of a polar organic compound in a non-polar organic diluent through a bed of substantially anhydrous silica particles, under a pressure of at least 200 bars so as to modify th... | 11/03/1981 |
| 4267055 | Separation of more planar molecules from less planar molecules Planar organic molecules, such as divinylbenzene or para-dioxin molecules, are adsorbed from mixtures of planar and non-planar molecules, such as commercial divinylbenzenes containing non-planar ethylvinylbenzene, or commercial 2,4,5-T herbicide containin... | 05/12/1981 |
| 4058457 | Recovery of activated carbon Activated carbon employed for removing weakly held contaminants such as organic chemicals from water, e.g., drinking water, can be recovered or regenerated by back flushing with iodine in water or an organic solvent and then the iodine recovered by reduci... | 11/15/1977 |
| 3979280 | Separation of unsaturated compounds from liquid hydrocarbon mixtures containing same Unsaturated hydrocarbons are separated from liquid mixtures containing same by adsorbing the unsaturated compound using a metal-loaded macroporous exchange resin and desorbing the unsaturated compound using a normally gaseous hydrocarbon.... | 09/07/1976 |
