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| Number | Title | Issue Date |
| 7459132 | Apparatus for dehydrogenation of ethylbenzene to styrene and method of retrofitting the apparatus The present invention discloses a process and apparatus for improving the catalyst life and efficiency in a gas flow catalyst bed reactor assembly. The reactor comprises an outer reaction vessel, an inner displacement cylinder, and an annular catalyst bed surroundin... | 12/02/2008 |
| 7439277 | In-situ preparation of hydroperoxide functionalized rubber A process for the preparation of a hydroperoxide functionalized rubber compound by the conversion of triplet state oxygen to singlet state oxygen in the presence of oxygen and a light-induced photoreductant. A dispersion of an unsaturated rubber component in a carri... | 10/21/2008 |
| 7419929 | Critical phase alkylation process A process for the production of ethylbenzene by the ethylation of benzene in the critical phase over a molecular sieve aromatic alkylation catalyst comprising cerium-promoted zeolite beta. An aromatic feedstock having a benzene content of at least 90 wt. % is suppli... | 09/02/2008 |
| 7407695 | High gloss polyethylene articles The present invention includes an end use article (i.e., an article of manufacture) and a process for making the same, wherein the end use article has a relatively high gloss and exhibits excellent processability over a wide range of processing conditions. The end u... | 08/05/2008 |
| 7405336 | Promoters for controlling acidity and pore size of zeolite catalysts for use in alkylation A metal-modified alkylation catalyst including a metalizeolite is provided where the metal is one or two selected from the group consisting of yttrium and a rare earth of the lanthanide series other than cerium. Where two metals are used, one may be Ce or La. The me... | 07/29/2008 |
| 7402635 | Process for preparing polyethylene Disclosed is process for producing polyethylene using a slurry loop reactor. The process includes using a mathematical model to predict a plurality of process control parameters based on the desired product properties and reactor characteristics and controlling the ... | 07/22/2008 |
| 7399402 | Method for hydrotreatment of a mixture of hydrocarbon compounds, rich in olefins and aromatic compounds Process for the hydrotreatment of a mixture of C4 to C8 hydrocarbon-based compounds, rich in olefins and monoaromatic compounds, by hydrogenation in the presence of a solid catalyst, characterized in that an ammonia precursor is introduced into the charge of hydroca... | 07/15/2008 |
| 7396879 | Method for reducing residual monomer in a polymer matrix Residual monomer in a polymer matrix may be reduced by a method including admixing a polymer matrix comprising an amount of residual monomer and a conjugated diene. This method can be carried out under reaction conditions such that the amount of residual monomer is ... | 07/08/2008 |
| 7384883 | Production of catalysts for olefin conversion A process for producing a catalyst for olefin cracking, the process comprising the steps of providing an MFI-type crystalline silicate catalyst, heating the catalyst in steam to remove aluminum from the crystalline silicate framework and extracting aluminum from the... | 06/10/2008 |
| 7375257 | Process for cracking an olefin-rich hydrocarbon feedstock A process for cracking an olefin containing hydrocarbon feedstock which is selective towards light olefins in the effluent, the process comprising passing a hydrocarbon feedstock containing one or more olefins through a moving bed reactor containing a crystalline si... | 05/20/2008 |
| 7371911 | Critical phase alkylation and transalkylation process in the presence of a beta zeolite A process for the production of ethylbenzene by the ethylation of benzene in the critical phase in a reaction zone containing a molecular sieve aromatic alkylation catalyst comprising cerium-promoted zeolite beta. A polyethylbenzene is supplied into the reaction zon... | 05/13/2008 |
| 7365111 | Use of zinc oxide to improve compatibility of polymer modified asphalt crosslinked with phenol aldehyde resin In methods of preparing asphalt and elastomeric polymer compositions crosslinked with phenol aldehyde resins and sulfur, such as polymer modified asphalt (PMA), it has been discovered that the MP1 compatibility may be improved by adding certain ionic metal oxides. S... | 04/29/2008 |
| 7341624 | Asphalt compositions and the preparation thereof Asphalt compositions and methods of forming such are described herein. The asphalt compositions and methods of forming such are generally adapted to enable open air processing while producing asphalt compositions that exhibit properties capable of meeting SUPERPAVE�... | 03/11/2008 |
| 7338991 | Process for preparing bitumen/rubber compositions In methods of preparing asphalt and elastomeric polymer compositions, it has been discovered that for a given crosslinker or vulcanizing agent there is an optimum crosslinking temperature to give a composition that has top and bottom softening points that are close.... | 03/04/2008 |
| 7309749 | Branched ionomers A branched aromatic ionomer is prepared by co-polymerizing a first monomer having an aromatic moiety and an unsaturated alkyl moiety and a second monomer having an ionic moiety and at least one unsaturated moiety. The ionic moiety may have a cationic group having a ... | 12/18/2007 |
| 7297827 | Use of monolith catalyst to prepare ethylbenzene Disclosed is an alkylation reactor for preparing ethylbenzene. The reactor comprises a monolith catalyst system that includes a monolith support impregnated or co-formed with a catalyst suitable to catalyze the alkylation of benzene with ethylene. The catalyst may b... | 11/20/2007 |
| 7294604 | Hydrogenation and dehydrogenation processes and catalysts therefor A process for hydrogenating unsaturations in petrochemical feedstocks, the process comprising contacting the petrochemical feedstock, including at least one component having unsaturations, and hydrogen with a catalyst comprising at least one Group Ia, Ib, IIb, VIb, ... | 11/13/2007 |
| 7293983 | Heating hydrocarbon process flow using flameless oxidation burners Hydrocarbon streams are heated uniformly and directly using one or more flameless oxidation burners. Flameless oxidation burners may control the temperature within a range of about 50° C. to reduce the tendency to coking due to localized “hot spots”. The hydroc... | 11/13/2007 |
| 7282546 | Cocatalysts for reduction of production problems in metallocene-catalyzed polymerizations Polyolefins may be prepared using a cocatalyst conforming to the formula: AIRz(Xz)nLzm wherein Rz is a linear or branched organic moiety having at least 5 carbons and Xz | 10/16/2007 |
| 7268264 | Critical phase alkylation process A process for the production of ethylbenzene by the ethylation of benzene in the critical phase over a molecular sieve aromatic alkylation catalyst. An aromatic feedstock having a benzene content of at least 90 wt. % is supplied into a reaction zone into contact wit... | 09/11/2007 |
| 7256247 | Polymerization of polyethylene having high molecular weight The present invention includes a bimodal polyethylene polymerization process wherein metallocene catalyst to is used to adjust the hydrogen response of a Ziegler-Natta catalyst. The polymerization may be carried out in a single reactor or in two or more reactors in ... | 08/14/2007 |
| 7186765 | Method for preparation of stable bitumen polymer compositions The present invention provides a method for preparing an asphalt and thermoplastic elastomer composition. The process comprises heating an asphalt cut in a stirred tank to a temperature sufficient to allow the stirring of the asphalt in the tank. A thermoplastic ela... | 03/06/2007 |
| 7179873 | Branched ionomers A branched aromatic ionomer is prepared by co-polymerizing a first monomer having an aromatic moiety and an unsaturated alkyl moiety and a second monomer having an ionic moiety and at least one unsaturated moiety. The ionic moiety may have a cationic group having a ... | 02/20/2007 |
| 7169960 | Dehydrogenation process A process for the dehydrogenation of a C2 or C3 alkyl aromatic compound to a corresponding vinyl aromatic compound in a tubular reactor incorporating a spiral flow path. Preferred embodiments of the invention provide processes for the productio... | 01/30/2007 |
