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| Number | Title | Issue Date |
| 8134035 | Preparation of asymmetric anthracene derivatives and organic electroluminescent device using same Provided is a method of preparing asymmetric anthracene derivative, more particularly, a method for high-yield production of an anthracene derivative in which an alkyl group, a cycloalkyl group, a heterocycloalkyl group, an aryl group or a heteroaryl group is introd... | 03/13/2012 |
| 7812204 | Process for the production of 2,6-dimethylnaphthalene The invention relates to a multi-step chemical transformation process for the production of 2,6-dimethylnaphthalene starting from one or more naphthalene hydrocarbons or hydrocarbon blends containing the same, one or more benzene hydrocarbons and, optionally, a meth... | 10/12/2010 |
| 7429683 | Process of maing naphthacene from propargyl alcohol A process for synthesizing a single isomer of a naphthacene compound comprises the steps of: (a) reacting a symmetrically substituted 1,1-diarylpropargyl alcohol compound with a reagent capable of forming a leaving group to form a ... | 09/30/2008 |
| 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 |
| 7355085 | Process of making naphthacene from a propargyl alcohol A process for synthesizing a single isomer of a naphthacene compound comprises the steps of: (a) reacting a symmetrically substituted 1,1-diarylpropargyl alcohol compound with a reagent capable of forming a leaving group to form a ... | 04/08/2008 |
| 7323610 | Process of making naphthacene from propargyl alcohol A process for synthesizing a naphthacene compound comprises the steps of: (a) reacting a propargyl alcohol compound with a reagent capable of forming a leaving group to form a reaction mixture containing an intermediate; and then | 01/29/2008 |
| 7247742 | Recycling polyethylene naphthalate containing materials in a process to produce diesters A process for preparing a dialkylester of a naphthalenedicarboxylic acid comprising directing a liquid phase reaction mixture comprising a low molecular weight alcohol, a naphthalenedicarboxylic acid, a dialkylester of a naphthalenedicarboxylic acid, and a polyethyl... | 07/24/2007 |
| 7208440 | Method for pretreatment of catalysts with a phosphoric acid base The invention relates to a method for pretreatment of a solid catalyst that is obtained by a reaction between an inorganic binder and phosphoric acid, whereby said method comprises a stage in which said catalyst is brought into contact with a mixture of hydrocarbons... | 04/24/2007 |
| 7130885 | Methods and apparatus providing electronic messages that are linked and aggregated A method for associating related electronic messages in computer storage. A first transportable application is created and stored. User input requesting creation of a link from the first transportable application to another transportable application is received. Use... | 10/31/2006 |
| 7019186 | Process for the preparation of 2,6-dimethylnaphthalene A highly selective process is described for preparing 2,6-dimethylnaphthalene which comprises reacting a naphthalene hydrocarbon selected from naphthalene, methylnaphthalenes, dimethylnaphthalenes, trimethylnaphthalenes, polymethylnaphthalenes, and/or their mixtures... | 03/28/2006 |
| 7001926 | Tubulin binding agents and corresponding prodrug constructs A diverse set of tubulin binding agents have been discovered which are structurally characterized, in a general sense, by a semi-rigid molecular framework capable of maintaining aryl-aryl, pseudo pi stacking distances appropriate for molecular recognition of tubulin... | 02/21/2006 |
| 6380450 | Process for producing indene Tetrahydroindene is dehydrogenated in a vapor phase in the presence of a metallic catalyst, e.g., a nickel-molybdenum catalyst, to produce indene, which is industrially useful in high yield while inhibiting the catalyst from suffering a decrease in activi... | 04/30/2002 |
| 6350930 | Method for producing aromatic compound A method for producing an aromatic compound styrenic compound adduct comprising the steps of: (1) reacting an aromatic compound and a styrenic compound in a first reactor 1 of fixed-bed flow type in a liquid phase in the presence of a solid acid catalyst,... | 02/26/2002 |
| 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 |
| 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 |
| 6057487 | Method for producing 2,6-DMN from mixed dimethylnaphthalenes by crystallization, adsorption and isomerization A method is disclosed to produce 2,6-dimethylnaphthalene (2,6-DMN), used for the production of polyethylene naphthalate, at high purity and high yield from a mixture of dimethylnaphthalene isomers without limitation to the specific isomers present in the ... | 05/02/2000 |
| 6018086 | Process for preparing 2,6-dialkylnaphthalene The present invention relates to a process of preparing dialkylnaphthylenes and polyalkylenenaphthyleneates.... | 01/25/2000 |
| 6015930 | Method of making 2,6-dimethylnaphthalene from other dimethylnaphthalene isomers and from dimethyltetralins/dimethyldecalins with a methyl group on each ring The invention discloses a method of making 2,6-dimethylnaphthalene from any DMN with one methyl on each ring in a two-step hydroisomerization/dehydrogenation process. The catalyst used in the hydroisomerization step is an acidic catalyst such as a silica ... | 01/18/2000 |
| 5955641 | Method of making dimethylnaphthalenes The method of the invention includes making dimethyinaphthalenes by first contacting, in an alkylation zone, at alkylation conditions, a toluene-containing stream with a pentene-containing stream in the presence of an acid alkylation catalyst. At least a ... | 09/21/1999 |
| 5952534 | Manufacturing of 2,6-dimethylnaphthalene The invention is related to a process for making 2,6-dimethylnaphthalene from p-xylene and 1- or 2-butene or butadiene via 1-(p-tolyl)-2-methylbutane or 1-(p-tolyl)-2-methylbutane. 2,6-dimethylnaphthalene can be used for making polyethylenenaphthalate.... | 09/14/1999 |
| 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 |
| 5401892 | Preparation of a dimethyltetralin by cyclizing an orthotolylpentene phenylhexene using an ultra-stable crystalline aluminosilicate molecular sieve y-zeolite A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is... | 03/28/1995 |
| 5396008 | Process for production of dimethyltetralin There is disclosed a process for producing dimethyltetralin consisting of 1,5-, 1,6- and 2,6-dimethyltetralin which comprises cyclizing 5-tolyl-penta-2-ene in gaseous state in the presence of diluent by the use of a catalyst comprising a crystalline alumi... | 03/07/1995 |
| 5300717 | Process for the preparation of dixylylpropane In a multi-step process, dixylylpropane is obtained inter alia via the hitherto unknown 1,2-dimethyl-4-(-chloroisopropyl)benzene, the readily accessible compounds o-xylene and propene being employed as starting compounds. The process yields the des... | 04/05/1994 |
| 5284987 | Preparation of a dimethyltetralin in a distillation reactor A method for the acid catalyzed cyclization of an alkenylbenzene feedstock to a dimethyltetralin in a liquid phase reaction wherein the desired dimethyltetralin is removed from the reaction mixture by distillation simultaneously with the addition of the f... | 02/08/1994 |
| 5276230 | Process for production of 2,6-dimethylnaphthalene There is disclosed a process for efficiently producing 2,6-dimethylnaphthalene used for the production of polyethylene naphthalate which comprises subjecting 2-methyl-1-(p-tolyl)butene and/or 2-methyl-1-(p-tolyl)butane as a starting raw material to cycliz... | 01/04/1994 |
| 5189234 | Selective dehydrogenation processes and catalysts A process for selectively dehydrogenating organic compounds, and particularly for dehydrogenating dimethyltetralins to dimethylnaphthalenes, by contacting the organic compound at an elevated temperature with a catalyst prepared by treating a composition c... | 02/23/1993 |
| 5136114 | Process for the preparation of geminal diarylalkanes, new geminal diarylalkanes and alk(en)ylated aromatic compounds The invention relates to a new process for the preparation of geminal diarylalkanes of the formula ##STR1## by Friedel-Crafts alkylation of aromatic compounds with specific aliphatic halogen compounds (addition compounds of CCl4 , to ... | 08/04/1992 |
| 5073670 | Preparation of a dimethyltetralin A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1-or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is ... | 12/17/1991 |
| 5068480 | Process for producing 2,6-dimethylnaphthalene A process for producing 2,6-dimethylnaphthalene, which comprises subjecting 2-methyl-1-(p-tolyl)-butene, 2-methyl-1-(p-tolyl)-butane or a mixture of these to cyclization and dehydrogenation in the presence of a catalyst comprising lead oxide and/or indium... | 11/26/1991 |
| 5030781 | Preparation of a dimethyltetralin A method for preparing one or more specific dimethyltetralins by cyclization of either 5-(o-, m, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, with additional cyclization treatment, and optionally cracking, of a heavy fraction of the cycliza... | 07/09/1991 |
| 5023390 | Process for production of 2,6-dimethylnaphthalene A process for production of 2,6-dimethylnaphthalene is disclosed; comprising the steps: (1) an acylation step where 2,4-dimethylisobutyrophenone is produced from m-xylene, propylene and carbon monoxide: (2) a hydrogenation step where the carbonyl group of... | 06/11/1991 |
| 5013424 | Process for the simultaneous hydrogenation of a first feedstock comprising hydrocarbonaceous compounds and having a non-distillable component and a second feedstock comprising halogenated organic compounds A process for the production of hydrogenated, distillable hydrocarbonaceous product from a feed comprising hydrocarbonaceous compounds and having a non-distillable component, and a feed comprising halogenated organic compounds by means of contacting the f... | 05/07/1991 |
| 5012024 | Preparation of a dimethylnaphthalene A method for preparing one or more dimethylnaphthalenes from one or more dimethyltetralins, and optionally for preparing one or more other specific dimethylnaphthalenes by isomerization of the aforesaid dimethylnaphthal-dimethylnaphthalene(s) is disclosed... | 04/30/1991 |
| 5008479 | Process for production of 2,6-dimethylnaphthalene A process for production of 2,6-dimethylnaphthalene is disclosed, comprising the steps: (1) an acylation step where p-tolyl sec-butyl ketone is produced from toluene, n-butene and carbon monoxide: (2) a hydrogenation step where the carbonyl group of the p... | 04/16/1991 |
| 4999450 | Process for preparing alpha-(3-benzylphenyl) propionic acid derivative A process for preparing -(3-benzylphenyl)-propionic acid or its derivative, a precursor of ketoprofen (trade name), which comprises dehydrogenating a by-product oil fraction formed in the production of ethylbenzene using synthetic zeolite as an alk... | 03/12/1991 |
| 4982029 | Method for the direct preparation of olefins from ketones and Grignard reagents A method for the direct preparation of olefins from ketones and Grignard reagents without isolation of the intermediate alcohol and in the absence of acidic dehydration catalysts. Ketones are reacted with a Grignard reagent in the presence of a low boilin... | 01/01/1991 |
| 4957815 | Polyarylalkane oligomer compositions containing xylene units, process for their manufacture, and products containing the same Polyarylalkane oligomer compositions consisting essentially of a mixture of isomers of xylyl-xylene and of higher homologues and a mixture of isomers of bis(dimethylphenyl)xylylene and of higher homologues; the method of making such compositions by first ... | 09/18/1990 |
| 4956120 | Polyarylalkane oligomer compositions and process for their manufacture Polyarylalkane oligomer compositions containing essentially of a mixture of isomers of benzylcumene and its higher homologues and a mixture of isomers of bis(isopropylphenyl)phenylmethane; the method of making such compositions by first reacting chlorine ... | 09/11/1990 |
| 4950825 | Preparation of a dimethyltetralin A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is... | 08/21/1990 |
