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| Number | Title | Issue Date |
| 7288688 | Process for preparing styrene A process for preparing styrene by contacting a gaseous feed which contains 1-phenylethanol and at least 0.1% wt of phenol and/or ethylphenol with a heterogeneous dehydration catalyst in the presence of at least 0.40% wt of benzylalcohol and at a molar ratio of benz... | 10/30/2007 |
| 7199274 | Preparation of substituted indenes The present invention relates to a simple process for preparing specifically substituted indenes of the formula (I) or (Ia) to compounds of the formula (II) serving as starting materials ... | 04/03/2007 |
| 7141701 | Decomposition of cumene hydroperoxide A process for decomposing a cumene oxidation product mixture containing cumene hydroperoxide (CHP) and dimethylphenolcarbinol (DMPC) to produce phenol and acetone. ... | 11/28/2006 |
| 7141700 | Decomposition of cumene hydroperoxide A process for the decomposition of a cumene oxidation product mixture to produce phenol and acetone with reduced by-product formation by introducing the cumene oxidation mixture into an inlet of a decomposing vessel containing indirect heat exchange surfaces wherein... | 11/28/2006 |
| 7074870 | Styrene polymers and phenol-triazole type complexes, catalysts, and processes for polymerizing Metal-ligand complexes that are useful as precursors to catalysts for the polymerization of olefins are provided. Certain of the catalysts are particularly effective at polymerizing ethylene and styrene into copolymers having novel properties, including a low molecu... | 07/11/2006 |
| 7045647 | Blends of quinone alkide and nitroxyl compounds and polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electro... | 05/16/2006 |
| 7030285 | Alkylation process A side-chain of a substituted aromatic compound is alkylated by reacting the aromatic compound with an alkylating agent in the presence of a catalyst. The catalyst comprises a restructured smectite clay to which basic ions are incorporated by ion-exchange. The restr... | 04/18/2006 |
| 7022220 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 04/04/2006 |
| 6974888 | Process for preparing organic hydroperoxide containing product Process for preparing alkylaryl hydroperoxide containing product, which process comprises: (a) oxidation of an alkylaryl compound to obtain reaction product containing alkylaryl hydroperoxide, (b) contacting with water at least part of the ... | 12/13/2005 |
| 6965004 | Ethylene-styrene copolymers and phenol-triazole type complexes, catalysts, and processes for polymerizing Metal-ligand complexes that are useful as precursors to catalysts for the polymerization of olefins are provided. Certain of the catalysts are particularly effective at polymerizing ethylene and styrene into copolymers having novel properties, including a low molecu... | 11/15/2005 |
| 6933355 | Ethylene-styrene copolymers and phenol-triazole type complexes, catalysts, and processes for polymerizing Metal-ligand complexes that are useful as precursors to catalysts for the polymerization of olefins are provided. Certain of the catalysts are particularly effective at polymerizing ethylene and styrene into copolymers having novel properties, including a low molecu... | 08/23/2005 |
| 6902663 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 06/07/2005 |
| 6872863 | Methylene bridged metallocenes as olefin-polymerization catalyst components A new class of methylene-bridged metallocenes of formula (I), wherein M is a transition metal of group 3, 4, 5, 6, lanthanide or actinide; X is a monoanionic sigma ligand; R1 can be alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R2 c... | 03/29/2005 |
| 6852896 | Concerted process for the production of an alkenyl substituted aromatic compound An integrated process of preparing a C2-5 alkenyl-substituted aromatic compound using a C6-12 aromatic compound and a C2-5 alkane as raw materials. The process involves two reaction steps operating in tandem, the first reaction step ... | 02/08/2005 |
| 6720467 | Polystyrene reclamation process This disclosure concerns a process and apparatus for reclamation of waste polystyrene-type materials for reuse within the specification ranges of the input polystyrene-type material. The disclosed process and apparatus include dissolution of the waste polystyrene-ty... | 04/13/2004 |
| 6545115 | Process for preparing a stable silicone oil containing SiH groups and hydrosilylable functions The invention concerns a novel method for preparing stable silicone fluid containing .ident.SiH groups. The preparation method is carried out from a first silicone fluid containing .ident.SiH groups and monomers with both a functional group and a group ca... | 04/08/2003 |
| 6518453 | Method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization In a process for stabilizing chemical compounds having at least one ethylenically unsaturated bond to undesired free radical polymerization, a nitroxyl radical and a chemical compound containing phosphorus in chemically bonded form are added to the unsatu... | 02/11/2003 |
| 6504038 | Process for the preparation of styrene and propylene oxide A process for the joint preparation of styrene and propylene oxide comprising the steps of: (a) reacting ethane and benzene to form ethylbenzene; (b) reacting ethylbenzene with oxygen or air to form ethylbenzene hydroperoxide; (c) reacting at least part o... | 01/07/2003 |
| 6462246 | Method of preparing alkenyl-substituted aromatic hydrocarbon A method of preparing an alkenyl-substituted aromatic hydrocarbon, which comprises alkenylating an aromatic hydrocarbon with an olefin using ଲ-diketone together with a rhodium complex catalyst in the presence of oxygen.... | 10/08/2002 |
| 6420620 | Process for preparing styrenes A process for the preparation of styrene or substituted styrenes that includes the steps of: subjecting a feed containing 1-phenyl ethanol or substituted 1-phenyl ethanol to a dehydration treatment in the presence of a dehydration catalyst; subjecting the... | 07/16/2002 |
| 6417357 | Coupling reactions with palladium catalysts This invention relates to a novel, inventive process for the preparation of biphenyls or aromatic olefins by coupling reactions of the Suzuki coupling and Heck coupling type, using allylpalladium catalysts of the μ-halo(triisopropylphosphine)(η3 | 07/09/2002 |
| 6403850 | Inhibition of polymerization of unsaturated monomers Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one stable hindered nitroxyl compound having the structural formula: ... | 06/11/2002 |
| 6395946 | Process for the preparation of styrenes Styrene or substituted styrenes are produced by a process comprising the gas phase dehydration of 1-phenyl ethanol or substituted 1-phenyl ethanol in the presence of a solid acidic catalyst comprising a zeolite and a binder material, wherein the weight ra... | 05/28/2002 |
| 6388155 | Styrene dehydrogenation reactor effluent treatment The fouling in a styrene production process involving the dehydrogenation of ethylbenzene is reduced by removing polymerizable components of the gaseous dehydrogenation effluent prior to the condensation of the effluent in the main condenser system. This ... | 05/14/2002 |
| 6388146 | Polymerizable compound, polymerizable resin composition, cured polymer and liquid crystal display device The polymerizable compound of this invention is represented by general formula (I): ##STR1## where R is H, R', R'O, R'COO, or R'OCO, R' is a linear or branched alkyl group or alkenyl group having 1 to about 15 carbon atoms, A1 and A2 | 05/14/2002 |
| 6387837 | Polymerization-initiating supported systems This invention relates to a process for the free-radical polymerization of monomers in gas phase or suspension processes using a supported, polymerization-initiating system comprising a) one or more polymerization-initiating components which initiate and ... | 05/14/2002 |
| 6388154 | Process for producing styrene A process for producing styrene by oxidative dehydrogentation of ethylbenzene, wherein the dehydrogenation of ethylbenzene is conducted through at least the following steps (1) to (3), whereby styrene can be produced in a high yield by controlling the low... | 05/14/2002 |
| 6369265 | Use of a catalyst system comprising nickel, palladium, or platinum and imidazoline-2-ylidene or imidazolidine-2-ylidene in kumada coupling reactions This invention provides a process for conducting Kumada coupling reactions. The processes of the present invention make use of N-heterocyclic carbenes as ancillary ligands in Kumada couplings of aryl halides. A Kumada coupling can be carried out by mixing... | 04/09/2002 |
| 6300533 | Inhibition of polymerization of ethylenically unsaturated monomers Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of an inhibitor having the structural formula: ##STR1## wherein R1 and R4... | 10/09/2001 |
| 6274761 | Process for the preparation of sulphonated distyryl-biphenyl compounds A process for the preparation of sulphonated distyryl-biphenyl compounds of formula (1), in which R1 and R2, independently, are hydrogen, C1 -C5 -alkyl, C1 -C5 -alkyl or halogen, and M repr... | 08/14/2001 |
| 6225513 | Process for the production of phenol and acetone from cumene The present invention relates to an improved method for producing phenol and acetone by oxidizing cumene into technical cumol hydroperoxide (CHP) through catalytic cleavage of the CHP. According to the invention, the oxidation products are concentrated to... | 05/01/2001 |
| 6194606 | Intermediates The present invention provides compounds having the formula: ##STR1## in which R is hydrogen or C1 -C4 alkyl, preferably hydrogen and Y is hydrogen, C1 -C4 alkyl, C1 -C4 alkoxy, CF3, ... | 02/27/2001 |
| 6194627 | Process for preparing aromatic olefins by using palladaphosphacyclobutanes as catalysts The invention relates to a process for preparing monofunctional, bifunctional and polyfunctional aromatic olefins of the formula (I) ##STR1## by reacting haloaromatics of the formula (II) ##STR2## with olefins of the formula (III) ##STR3## wherein a ... | 02/27/2001 |
| 6127590 | Oxidative coupling of olefins and aromatics using a rhodium catalyst and a copper(II) redox agent This invention relates generally to the field of chemical synthesis, and more specifically, to the field of oxidative coupling of olefinic compounds and aromatic compounds, to produce olefinically substituted aromatic compounds. More particularly, this in... | 10/03/2000 |
| 6090272 | Process for converting a cracked gasoline using a zeolite-based catalyst material A process for producing catalyst compositions for converting a cracked gasoline feedstock to a product comprising incremental aromatics and lower olefins. The catalyst compositions produced thereby. A process for converting a cracked gasoline feedstock to... | 07/18/2000 |
| 6080894 | propylene oxide and styrene monomer co-production procedure The propylene oxide and styrene co-production process generates a heavy residue byproduct containing metals, mainly sodium, which previously was adequate for use only as low quality fuel. According to the invention, the heavy residue is dehydrated in the ... | 06/27/2000 |
| 6037511 | Catalyst for dehydrogenating aromatic with carbon dioxide The invention herein relates to a catalyst for enhancing the conversion of the dehydrogenation reaction of aromatic hydrocarbons such as ethylbenzene under a flow of carbon dioxide, which is expressed by the following formula I, wherein a catalyst in whic... | 03/14/2000 |
| 6017469 | Supertwist liquid-crystal display Supertwist liquid crystal displays with outstanding properties are obtained when the nematic liquid crystal mixture contains at least one compound of the formula (I): ##STR1## where the variables are as defined in the disclosure.... | 01/25/2000 |
| 5969204 | Process for the production of distyryl-biphenyl compounds A process for the production of compounds useful as fluorescent whitening agents of formula: ##STR1## in which X and Y, are as defined herein and n is 1 or 2, comprises A) diazotising one mole of an amine of formula: ##STR2## (2A) to produ... | 10/19/1999 |
| 5968409 | Method for preparing trimer of -methyl styrene or derivatives thereof A method for preparing a trimer of -methyl styrene or derivatives thereof, wherein -methyl styrene or derivatives thereof is added to an organic solvent comprising Lewis acid is provided. According to the method, the trimer of -methyl... | 10/19/1999 |
