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| Number | Title | Issue Date |
| 7371916 | Conversion of an alcoholic oxygenate to propylene using moving bed technology and an etherification step The average propylene selectivity per on-stream cycle of an alcoholic oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of a feed pretreatment step involving a cata... | 05/13/2008 |
| 7371915 | Conversion of oxygenate to propylene using moving bed technology The average cycle propylene selectivity of an oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of moving bed reactor technology in the hydrocarbon synthesis portio... | 05/13/2008 |
| 7323612 | Removal of condensable compounds from an olefin stream This invention is directed to a process for condensing and removing condensable compounds from an olefin stream containing light olefin compounds, and recovering the light olefin compounds. The process of the invention is particularly effective in removing water and... | 01/29/2008 |
| 7271304 | Process and apparatus for the production of diesel fuels by oligomerisation of olefinic feed streams This invention provides a process for the production of diesel boiling range hydrocarbons, the process including at least the steps of obtaining an olefinic feed stream from one or more hydrocarbon producing processes wherein the olefinic feed stream contains branch... | 09/18/2007 |
| 7238844 | Olefin oligomerization This invention is to a method of oligomerizing an olefin feed stream. The olefin feed stream contains at least one C2 to C12 olefin to obtain an olefin feed stream and has less than 1,000 ppm by weight oxygenated hydrocarbon. The olefin is olig... | 07/03/2007 |
| 7183450 | Olefin oligomerization This invention is to a method of oligomerizing an olefin feed stream. The olefin feed stream contains at least one C2 to C12 olefin to obtain an olefin feed stream and has from about 1,000 ppm to about 10 percent by weight oxygenated hydrocarbo... | 02/27/2007 |
| 7176340 | Continuous process for the alkylation of hydrocarbons A continuous alkylation process performed in an apparatus comprising a series of at least two zone A reactors and a series of at least two zone B reactors, in which the zone A reactors and the zone B reactors cycle between alkylation mode and mild regeneration mode,... | 02/13/2007 |
| 7138557 | Selective dimethylether recovery and recycle in a methanol-to-olefin process An improved methanol-to-olefin (MTO) product recovery scheme is provided which enables substantial reduction in the amount of light olefins that are undesirably captured in a dimethylether (DME) recycle stream when a portion of the methanolic feed to the MTO reactio... | 11/21/2006 |
| 7132580 | Selective dimethylether and methanol recovery and recycle in a methanol-to-olefin process An improved methanol-to-olefin (MTO) product recovery scheme is provided which enables substantial reduction in the amount of light olefins that are undesirably captured in a dimethylether (DME) recycle stream and improved recovery of methanol when a portion of the ... | 11/07/2006 |
| 7090081 | Selectively removing undesirably sized catalyst particles from a reaction system The present invention provides various processes for selectively removing undesirably sized catalyst particles from a reaction system. In one embodiment, a plurality of catalyst particles, having a first median particle diameter, is withdrawn from the reaction syste... | 08/15/2006 |
| RE39222 | Process for preparing 2,6-dialkylnaphthalene A process for producing 2,6-dialkylnaphthalene from a hydrocarbon feedstock that contains at least one component selected from the group consisting of dialkylnaphthalene isomers, monoalkylnaphthalene isomers, polyalkylnaphthalenes, and naphthalene, is provided that ... | 08/01/2006 |
| 6969595 | Carotenoid production from a single carbon substrate A method for the production of carotenoid compounds is disclosed. The method relies on the use of microorganisms which metabolize single carbon substrates for the production of carotenoid compounds in high yields. ... | 11/29/2005 |
| 6846965 | Method for the oligomerization of C2 C8-olefins C2-C8-olefins are oligomerized in a process in which a stream of an olefin-containing hydrocarbon mixture is passed over a heterogeneous, nickel-containing oligomerization catalyst in n successive adiabatically operated reaction zones, where nā... | 01/25/2005 |
| 6635778 | Catalysts systems for the polymerization and copolymerization of alpha-olefins Catalyst component for the polymerization of alpha-olefins of general formula (I) ##STR1## wherein: M is a transition metal of groups 3, 4-10 of the periodic table of the elements, Each X group can be equal or different and it is hydride, halogen... | 10/21/2003 |
| 6528693 | Preparation of cyclopropylethyne and intermediates for preparation of cyclopropylethyne 1-chloropropylethyne is prepared by dehydrochlorination with a base of 1-chloro-1-cyclopropylethene, which is itself prepared by treating 1-cyclopropylethanone with dichlorotriarylphosphorane or dichlorotrialkylphosphorane in the presence of a base.... | 03/04/2003 |
| 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 |
| 6444868 | Process to control conversion of C4+ and heavier stream to lighter products in oxygenate conversion reactions A method for converting heavy olefins present in a product stream exiting a first reaction zone into light olefins and carbonaceous deposits on a catalyst without separation of the heavy olefins from the product stream exiting the first reaction zone. The... | 09/03/2002 |
| 6339179 | Production of alkyl aromatics by passing transalkylation effluent to alkylation zone and to product recovery zone A process for producing alkyl aromatics using a transalkylation reaction zone and an alkylation reaction zone is disclosed. One portion of the transalkylation reaction zone effluent passes to an alkylation reaction zone where an aromatic substrate is alky... | 01/15/2002 |
| 6323381 | Manufacture of high purity benzene and para-rich xylenes by combining aromatization and selective disproportionation of impure toluene A process is set forth for reacting impure toluene to obtain benzene, toluene and a para-rich xylene stream, which are substantially free of close-boiling non-aromatics. The impure toluene comprises at least 70 wt % toluene and between about 0.2 wt % and ... | 11/27/2001 |
| 6303839 | Process for producing polymer grade olefins The present invention relates to a process for the production of light olefins comprising olefins having from 2 to 4 carbon atoms per molecule from an oxygenate feedstock. The process comprises passing the oxygenate feedstock to an oxygenate conversion zo... | 10/16/2001 |
| 6194625 | Alkylation by controlling olefin ratios Disclosed are various embodiments for alkylating olefins and isoparaffins in the presence of an acid to reduce and/or control acid consumption or maximize and/or control the octane number of the produced alkylate product. One embodiment includes alkylatio... | 02/27/2001 |
| 6166279 | Preparation of olefins The preparation of olefins from steam cracker or refinery C4 streams is carried out by selective hydrogenation of butadienes and acetylenic impurities in the steam cracker or refinery C4 stream, with simultaneous or subsequent, at le... | 12/26/2000 |
| 6121501 | Process for preparing 2,6-dialkylnaphthalene A process for producing 2,6-dialkylnaphthalene from a hydrocarbon feedstock that contains at least one component selected from the group consisting of dialkylnaphthalene isomers, monoalkylnaphthalene isomers, polyalkylnaphthalenes, and naphthalene, is pro... | 09/19/2000 |
| 6096935 | Production of alkyl aromatics by passing transalkylation effluent to alkylation zone A process for producing alkyl aromatics using a transalkylation reaction zone and an alkylation reaction zone is disclosed. The transalkylation reaction zone effluent passes to the alkylation reaction zone where aromatics in the transalkylation reaction z... | 08/01/2000 |
| 5998684 | Recovery process for wet aromatic alkylation and dry aromatic transalkylation A separation arrangement for a cumene process that operates with a relatively wet feed to an alkylation zone and relatively dry feed to a transalkylation zone reduces utilities and capital expenses for the separation and recycle of distinct wet and dry co... | 12/07/1999 |
| 5914433 | Process for producing polymer grade olefins The present invention relates to a process for the production of light olefins comprising olefins having from 2 to 4 carbon atoms per molecule from an oxygenate feedstock. The process comprises passing the oxygenate feedstock to an oxygenate conversion zo... | 06/22/1999 |
| 5849965 | Multistage alkylation process In a multistage process, a relatively unreactive paraffinic substrate is alkylated in a primary stage while a more reactive aromatic substrate is alkylated in a secondary stage wherein at least a portion of the effluent from the primary stage is used as a... | 12/15/1998 |
| 5847253 | Alkylation-transalkylation process using stripping to produce a dry transalkylation feed A process for the production of alkylaromatic hydrocarbons that operates with a high water content in an alkylation zone and a low water content in a transalkylation zone is disclosed. An aromatic feed and an acyclic feed are first passed through the alky... | 12/08/1998 |
| 5841014 | Alkylation by controlling olefin ratios Disclosed are various embodiments for alkylating olefins and isoparaffins in the presence of an acid to reduce and/or control acid consumption or maximize and/or control the octane number of the produced alkylate product. One embodiment includes alkylatio... | 11/24/1998 |
| 5750821 | Method for oxidative coupling of methane comprising catalytic cracking The following steps are conducted for producing a hydrocarbon having a carbon number of at least 2: a coupling step, in which a coupling feed gas containing methane and a gas containing oxygen are supplied to a conveying catalyst bed which is formed by an... | 05/12/1998 |
| 5744669 | Process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates A process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates to produce a stream comprising hydrogenated hydrocarbonaceous compounds free from organic nitrates and halogenated organic compounds by means of c... | 04/28/1998 |
| 5744670 | Process for preparing dialkylnaphthalene A process for producing alkylnaphthalene from a feedstock comprising isomers of dialkylnaphthalene and naphthalene by contacting the feedstock with a catalyst composition, in which the process comprising transalkylation between isomers of dialkylnaphthale... | 04/28/1998 |
| 5498815 | Preparation of synthetic oils from vinylidene olefins and alpha-olefins A synthetic oil is made by a process comprising the steps of (a) reacting a vinylidene olefin in the presence of a catalyst to form an intermediate mixture which contains at least about 50 weight percent dimer of said vinylidene olefin, and (b) adding a v... | 03/12/1996 |
| 5489724 | High pressure drop endothermic process Aliphatic feeds are converted to olefins and/or aromatics in a multi pressure reactor system. A high pressure first stage reactor generates much or all of the hydrogen needed to reduce catalyst coking in lower pressure downstream reactors. High pressure o... | 02/06/1996 |
| 5475175 | Process for the production of alkylate gasoline from FCC light aliphatics This invention provides a process for upgrading hydrocarbon feedstock comprising the steps of: (i) recovering a C4 -rich aliphatic stream from a catalytic cracking process; (ii contacting said C4 -rich aliphatic stream with an isomerizati... | 12/12/1995 |
| 5447622 | Integrated catalytic cracking and olefin producing process using staged backflow regeneration Disclosed is a method which combines catalytic cracking and olefin production using a coked catalytic cracking catalyst as a dehydrogenation catalyst to dehydrogenate an alkane feed stream and form an olefin rich product stream. The method uses a staged b... | 09/05/1995 |
| 5414172 | Naphtha upgrading A process for upgrading low octane naphthas to produce gasoline products with low levels of benzene and aromatics while retaining a high pool octane uses a paraffinic naphtha reformer feed which is dehexanized to provide a C7 + fraction which i... | 05/09/1995 |
| 5365006 | Process and apparatus for dehydrogenating alkanes An alkane-containing feedstream is passed through one or more tubes, which may contain alkane-dehydrogenation catalyst, immersed in a bed of fluidized particles. The bed is at an elevated temperature which maintains the temperature within the tube(s) at a... | 11/15/1994 |
| 5283385 | Upgrading of normal pentane to cyclopentane This invention is a process of converting n-pentane to cyclopentane. In accordance with a preferred embodiment of the invention, n-pentane feed is converted in dual temperature stage process without interstage processing of the first stage product mixture... | 02/01/1994 |
| 5237118 | Ethylene oligomerization An ethylene oligomerization process comprising: (a) contacting, in a reaction solution, an organonickel compound and a phosphine compound to form a first reaction mixture; and thereafter (b) contacting said first reaction mixture with ethylene to form a s... | 08/17/1993 |
