Polycyclic Patents (Class 585/320)
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Patent number: 4401585Abstract: Bis(p-alkylphenylethynyl)anthracenes are described for use as fluorescer components in chemiluminescent reaction mixtures and in precursor solutions or solid mixtures. Chemiluminescent mixtures comprising these fluorescers are shown to generate higher light capacity and higher quantum yields than those made with similar prior art fluorescers.Type: GrantFiled: January 21, 1982Date of Patent: August 30, 1983Assignee: American Cyanamid CompanyInventors: Frank J. Arthen, Jr., Robert J. Manfre
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Patent number: 4393258Abstract: A 1-cyclohexyl-2-cyclohexylphenylethane derivative of the following general formula ##STR1## wherein R.sub.1 and R.sub.2, independently from each other, represent a linear alkyl group having 1 to 7 carbon atoms.Type: GrantFiled: June 10, 1982Date of Patent: July 12, 1983Assignee: Dainippon Mk & Chemicals Inc.Inventors: Hisato Sato, Haruyoshi Takatsu, Yutaka Fujita, Masayuki Tazume, Kiyohumi Takeuchi, Hiroyuki Ohnishi
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Patent number: 4384152Abstract: A method for production of anthracene from phenanthrene is disclosed. Phenanthrene is hydrogenated at a nickel on a carrier catalyst at temperatures from about 140.degree. C. to 170.degree. C. under a pressure of from about 10 to 30 bar by gradual addition of hydrogen. The hydrogenation product is separated by distillation into sym.-octahydrophenanthrene and asym.-octahydrophenanthrene. The sym.-octahydrophenanthrene is isomerized in the presence of methylene chloride as a solvent and of aluminum chloride as a catalyst at a temperature from about -30.degree. to +5.degree. C. to sym.-octahydroanthracene. The sym.-octahydroanthracene is dehydrogenated at a chromium oxide-aluminum oxide catalyst at temperatures from about 450.degree. to 550.degree. C. to anthracene.The resulting anthracene is obtained with high yield and is very pure after a single recrystallization step.Type: GrantFiled: December 18, 1980Date of Patent: May 17, 1983Assignee: Bergwerksverband GmbHInventors: Kurt Handrick, Georg Kolling, Fritz Mensch
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Patent number: 4374291Abstract: Bis(ethynylphenyl) compounds are prepared by an improved synthesis process which increases yield and is suitable for large scale synthesis operations. Aromatic dianilines are diazotized to form aromatic halides that are subsequently coupled with an end-protecting group having acetylenic moieties. The end-protecting groups are subsequently removed leaving the desired diethynyl derivative in quantitative yields.Type: GrantFiled: November 6, 1981Date of Patent: February 15, 1983Assignee: Hughes Aircraft CompanyInventor: Kreisler S. Y. Lau
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Patent number: 4365103Abstract: A 1,1-diphenylethane and an aromatic compound such as benzene are reacted in the presence of a Friedel-Craft's catalyst to provide a compound having two 1,1-diaromatic substituted ethane groups, dehydrogenation provides a bis(1-phenylethenyl)aromatic compound.Type: GrantFiled: December 4, 1981Date of Patent: December 21, 1982Assignee: The Dow Chemical CompanyInventors: Kuo Y. Chang, Sterling C. Gatling
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Patent number: 4292455Abstract: A multi-stage dehydrogenation process for preparing indene and substituted indenes from indene precursors more saturated than indene is described. The process comprises the steps of(a) contacting said indene precursor in a first dehydrogenation zone with a dehydrogenation catalyst at an elevated temperature to form an intermediate product,(b) advancing the product of the first dehydrogenation zone to a second dehydrogenation zone,(c) contacting said product in the second dehydrogenation zone with a second dehydrogenation catalyst at an elevated temperature, and(d) recovering indene or a substituted indene from said second zone.The process of the invention results in yields of indene which are enhanced when compared to single stage, essentially isothermal processes using a single catalyst.Type: GrantFiled: December 28, 1979Date of Patent: September 29, 1981Assignee: The Standard Oil Co.Inventors: Joseph P. Bartek, Rimoydas L. Cepulis, Robert K. Grasselli
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Patent number: 4291180Abstract: A process for the co-production of indene and styrene from a mixture of cyclopentadiene or dicyclopentadiene and butadiene is disclosed. The process comprises the steps of reacting cyclopentadiene or dicyclopentadiene with butadiene in a Diels-Alder reaction to form a mixture of tetrahydroindene, vinylcyclohexene and vinylnorbornene followed by the recovery of the tetrahydroindene and vinylcyclohexene, and the oxydehydrogenation of the tetrahydroindene/vinylcyclohexene mixture utilizing a composite catalyst comprising cobalt oxide and molybdenum oxide.Type: GrantFiled: December 28, 1979Date of Patent: September 22, 1981Assignee: Standard Oil CompanyInventor: Oliver A. Kiikka
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Patent number: 4291181Abstract: A dehydrogenation process for producing indene and substituted indenes from tetrahydroindene or substituted tetrahydroindene is described and comprises contacting said tetrahydroindene or substituted tetrahydroindene with a catalyst comprising cobalt oxide and molybdenum oxide at an elevated temperature for a period of from about 0.1 to 30 seconds. The tetrahydroindene and substituted tetrahydroindenes may be prepared from cyclopentadiene or dicyclopentadiene and a butadiene.Type: GrantFiled: December 28, 1979Date of Patent: September 22, 1981Assignee: Standard Oil CompanyInventors: Oliver A. Kiikka, George S. Li
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Patent number: 4254292Abstract: A method for preparing polycyclic aromatic hydrocarbons with excellent yield and selectivity but without the formation of cyclic dimers and other undesirable by-products. In the method of the present invention, styrene, .alpha.-methylstyrene, .beta.-methylstyrene and/or vinyltoluene is dimerized and/or codimerized to produce unsaturated dimer and/or codimer in the first step reaction and said unsaturated dimer and/or codimer is caused to react with an aromatic hydrocarbon or hydrocarbons in the second step reaction, and both the first and second step reactions are carried out in the presence of a catalyst which is represented by the general formula: RCF.sub.2 SO.sub.3 H, in which the symbol R is Cl, F or C.sub.n F.sub.p CL.sub.2n+1-p, wherein n is an integer from 1 to 3 and p is also an integer from 1 to 2n+1.Type: GrantFiled: October 18, 1979Date of Patent: March 3, 1981Assignee: Nippon Petrochemicals Co., Ltd.Inventors: Isoo Shimizu, Okitsugu Tsuji, Eiichi Matsuzaka, Atsushi Sato
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Patent number: 4222852Abstract: Coronene deposits are removed from a heat exchange zone of the reforming process by recycling a portion of the normally liquid reformate to the heat exchange zone to dissolve the coronene deposits.Type: GrantFiled: February 2, 1979Date of Patent: September 16, 1980Assignee: Exxon Research & Engineering Co.Inventors: Walter S. Kmak, Akira Yatabe
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Patent number: 4203825Abstract: Coronene deposits are removed from a heat exchange zone of a reforming process by operating the reforming zone at conditions such that at least a portion of the reformer effluent condenses in the heat exchange zone where the coronene deposit occurs.Type: GrantFiled: February 2, 1979Date of Patent: May 20, 1980Assignee: Exxon Research & Engineering Co.Inventors: Walter S. Kmak, Charles Monzo
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Patent number: 4181684Abstract: Organo-lithium compounds of the formula: ##STR1## wherein R is an alkyl group of up to 5 carbon atoms, R' is either hydrogen or an alkyl group of up to 5 carbon atoms and n is an integer from 2 to 10. These bifunctional organo-lithium compounds are prepared without the use of any polar or complexing agent and are useful as polymerization initiators for the production of block copolymers.Type: GrantFiled: August 5, 1977Date of Patent: January 1, 1980Assignee: Societe Chimique des Charbonnages--CdF CHIMIEInventors: Pierre Sigwalt, Patrick Guyot, Michel Fontanille, Jean-Pierre Vairon
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Patent number: 4172100Abstract: Highly desirable organic liquid soluble multifunctional lithium containing initiators are prepared by reacting an organo lithium compound with an organic compound containing at least one group of the configuration 1,3-bis(1-phenylethenyl)benzene. Such initiators can be prepared in the absence of polar solvents and are very desirable for the polymerization of dienes such as butadiene to a desirable 1,4 configuration.Type: GrantFiled: August 7, 1978Date of Patent: October 23, 1979Assignee: The Dow Chemical CompanyInventors: Lu H. Tung, Grace Y. Lo, Douglas E. Beyer
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Patent number: 4165434Abstract: Novel dyestuffs comprising at least one laser dyestuff radical and at least one fluorescent dyestuff radical, where the fluorescent range of the fluorescent dyestuff radical overlaps the absorption range of the laser dyestuff radical and is linked with the laser dyestuff radical directly or via a bridge member having a length of at most 20 A in such a manner that the .pi. electron systems of the individual radicals are decoupled, are outstandingly effective and long lived when used in dyestuff lasers. The dyestuffs can be of the formula:X--(CR.sub.1 R.sub.2).sub.n --X--[(CR.sub.1 R.sub.2).sub.n --X].sub.mwhereinN is 0 or an integer from 1 up to a number corresponding to a chain length of 20 A,m is 0, 1, 2 or 3,X is a laser dyestuff radical L or a fluorescent dyestuff radical F andR.sub.1 and R.sub.Type: GrantFiled: June 1, 1977Date of Patent: August 21, 1979Assignee: Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.Inventors: Fritz P. Schafer, Wolfgang Luttke
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Patent number: 4152356Abstract: This invention relates to a method of producing a dibenzocycloheptene compound of the structure ##STR1## in high yields which comprises: (a) hydrogenating an anthracene derivative in the 9,10 position to form a 9,10-dihydroanthracene derivative, (b) selectively mono-carbonylating one of the hydrogens in the 9,10 position to form a monoaldehyde, (c) reducing the aldehyde to form the corresponding alcohol and (d) dehydrating and expanding the center ring to form the dibenzocycloheptene compound.Type: GrantFiled: April 24, 1978Date of Patent: May 1, 1979Assignee: Exxon Research & Engineering Co.Inventor: Chang J. Kim