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| Number | Title | Issue Date |
| 7411101 | Production of alkylaromatic compounds A process for producing a monoalkylation aromatic product, such as ethylbenzene and cumene, utilizing an alkylation reactor zone and a transalkylation zone in series or a combined alkylation and transkylation reactor zone. ... | 08/12/2008 |
| 7317133 | Process for enhanced olefin production The present invention relates to a process for the production of light weight olefins comprising olefins having from 2 to 3 carbon atoms per molecule from an oxygenate feedstock. The process comprises passing the oxygenate feedstock to an oxygenate conversion zone c... | 01/08/2008 |
| 7268265 | Apparatus and process for light olefin recovery The present invention relates to a process and apparatus for the production of light olefins comprising olefins having from 2 to 3 carbon atoms per molecule from a feedstock containing heavier olefins. An intermediate cut from a fractionation column is used as olefi... | 09/11/2007 |
| 7256318 | Regeneration temperature control in a catalytic reaction system This invention is directed to controlling regenerator temperature in an oxygenate to olefin process. Because a significant amount of heat can produced in the regenerator during the regeneration process, at least a portion of the heat must be removed to keep the syst... | 08/14/2007 |
| 7247600 | Catalyst composition There is provided a catalyst carrier comprising a refractory inorganic material having a sodium solubilization rate no greater than 5 ppmw/5 minutes. There is further a catalyst comprising a refractory inorganic material carrier having a sodium solubilization rate n... | 07/24/2007 |
| 7238848 | Method for separating dimethyl ether from an olefin-containing product stream A method for processing an olefin-containing product stream that contains dimethyl ether as a by-product is described. Such a product stream arises, for example, in the synthesis of olefin from methanol. For separation of the dimethyl ether from the product stream, ... | 07/03/2007 |
| 7232918 | Catalyst composition There is provided a catalyst carrier comprising a refractory inorganic material having a sodium solubilization rate no greater than 5 ppmw/5 minutes. There is further a catalyst comprising a refractory inorganic material carrier having a sodium solubilization rate n... | 06/19/2007 |
| 7232786 | Catalyst composition There is provided a catalyst carrier comprising a refractory inorganic material having a sodium solubilization rate no greater than 5 ppmw/5 minutes. There is further a catalyst comprising a refractory inorganic material carrier having a sodium solubilization rate n... | 06/19/2007 |
| 7230151 | Two catalyst process for making olefin This invention is to a process of making olefin, particularly ethylene and propylene, from an oxygenate feed. The invention uses two or more zeolite catalysts. Examples of zeolite catalysts include a first catalyst containing of ZSM-5, and a second catalyst containi... | 06/12/2007 |
| 7189887 | Process for removing naphthalene from alkylaromatics A process for the reduction of naphthalene in process streams containing alkylaromatic solvents. Naphthalene is contacted with alkylbenzenes in a distillation column reactor in the presence of transalkylation catalyst to produce alkylnaphthalenes which are concurren... | 03/13/2007 |
| 7175754 | Process for the production of low benzene gasoline A process for the production of low benzene content gasoline is disclosed wherein a full boiling range naphtha is fractionated to produce a light naphtha, a medium naphtha and a heavy naphtha. The benzene is contained in the medium naphtha and this stream is subject... | 02/13/2007 |
| 7084319 | Catalyst fluidization in oxygenate to olefin reaction systems The present invention provides various processes for fluidizing molecular sieve catalyst compositions in a fluidized bed reaction system. The invention comprises fluidizing a molecular sieve catalyst composition with a reactive fluidizing medium under conditions eff... | 08/01/2006 |
| 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 |
| 7078563 | Oxidation process for the production of alkenes and carboxylic acids A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and the corresponding alken... | 07/18/2006 |
| 7067597 | Process of making polypropylene from intermediate grade propylene This invention concerns using an intermediate grade propylene stream as feed to a polypropylene forming reaction system. The intermediate grade propylene stream is preferably recovered form the olefin product of an oxygenate to olefins reaction process, and low in d... | 06/27/2006 |
| 7060866 | High pressure separation of dimethyl ether from an olefin stream Disclosed is a method of removing dimethyl ether from an ethylene and/or propylene containing stream. Dimethyl ether is removed at a high pressure, preferably in a distillation column. The high pressure separation has the benefit of providing a relatively low bottom... | 06/13/2006 |
| 7030284 | Method and reactor system for converting oxygenate contaminants in an MTO reactor system product effluent to hydrocarbons Disclosed is a method and reactor system for converting oxygenate and/or olefin contaminants in a methanol to olefin reactor system product effluent to hydrocarbons, including paraffin compounds, preferably over a sulphided catalyst of the type Nickel or Cobalt comb... | 04/18/2006 |
| 6646172 | Preparation of propene A multistage process for preparing propene, in which the first stage is the reaction of 1-butene, 2-butene and isobutene to give propene, 2-pentene and 2-methyl-2-butene in the presence of a metathesis catalyst comprising at least one compound of a metal ... | 11/11/2003 |
| 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 |
| 6433240 | Preparation of propene and, if desired, 1-butene Propene and, if desired, 1-butene are prepared by first reacting 1-butene and 2-butene to give propene and 2-pentene in the presence of a metathesis catalyst containing at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic... | 08/13/2002 |
| 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 |
| 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 |
| 6271430 | Preparation of propene The present invention relates to a process for preparing propene by metathesis of olefins. The process comprises preparing propene by a) in a first reactor (R1), reacting 1-butene and 2-butene to give propene and 2-pentene in the presence of a metathesis catal... | 08/07/2001 |
| 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 |
| 6150578 | 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... | 11/21/2000 |
| 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 |
| 6018086 | Process for preparing 2,6-dialkylnaphthalene The present invention relates to a process of preparing dialkylnaphthylenes and polyalkylenenaphthyleneates.... | 01/25/2000 |
| 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 |
| 5977420 | Dual-loop xylene isomerization process A method for increasing the efficiency of xylene isomerization by using a two stage isomerization process. In the first stage of the process, a C9+ aromatics feedstock is subjected to ethylbenzene conversion and xylene isomerization... | 11/02/1999 |
| 5959168 | Zeolite-based ethylabenzene process adaptable to an aluminum chloride-based ethylbenzene plant A zeolite-based ethylbenzene process which is suitable for retrofitting aluminum chloride-based ethylbenzene plants. The process involves alkylating benzene with ethylene in an alkylation zone in the presence of zeolite beta or Y or an MCM zeolite so as t... | 09/28/1999 |
| 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 |
| 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 |
| 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 |
| 5512635 | Process for preparing linear monofunctional and telechelic difunctional polymers and compositions obtained thereby This invention relates to a process for preparation of non-crosslinked linear monofunctional and telechelic difunctional unsaturated polymers wherein the functional groups are reactive terminal groups other than vinyl groups. The average functionality num... | 04/30/1996 |
| 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 |
| 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 |
| 5446223 | Alkylation of organic aromatic compounds The aging rate of the catalyst in a process for the concurrent alkylation of aromatic with olefin and distillation of reaction components (reactants and products) in a distillation column reactor in a catalyst bed wherein the catalyst also serves as the d... | 08/29/1995 |
