By Substituting Halogen For A Different Halogen In Haloalkyl Group Patents (Class 570/145)
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Publication number: 20130225815Abstract: A method of forming a fluorinated molecular entity includes reacting in a reaction mixture an aromatic halide, copper, a fluoroalkyl group, and a ligand. The aromatic halide includes an aromatic group and a halogen substituent bonded to the aromatic group. The ligand includes at least one group-V donor selected from phosphorus and an amine. The overall molar ratio of copper to aromatic halide in the reaction mixture is from 0.2 to 3. The method further includes forming a fluoroalkylarene including the aromatic group and the fluoroalkyl group bonded to the aromatic group. A composition, which may be used in the method, consists essentially of copper, the fluoroalkyl group, and the ligand, where the molar ratio of copper to the fluoroalkyl group is approximately 1.Type: ApplicationFiled: February 19, 2013Publication date: August 29, 2013Applicant: The Board of Trustees of the University of IllinoisInventors: John F. Hartwig, Hiroyuki Morimoto, Patrick Fier
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Patent number: 7868213Abstract: A method for producing 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (BFTFB) is disclosed. The target compound is predicted as a very potent monomer for low dielectric constant material. This method comprises the following steps: (a) mixing 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (DFMTFB), a bromination agent, and a solvent (with or without) to form a mixture; (b) heating the mixture under UV radiation; and (c) purifying the resultant to obtain 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (BFTFB) with high purity.Type: GrantFiled: July 29, 2008Date of Patent: January 11, 2011Assignees: Yuan-Shin Materials Technology Corp, Chung-Shan Institute of Science and Technology, Armaments Bureau. M.N.D.Inventors: Chuan-Yu Chou, Po-Chen Chang, Chun-Hsu Lin, Shieh-Jun Wang
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Publication number: 20090171130Abstract: A method for producing 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (BFTFB) is disclosed. The target compound is predicted as a very potent monomer for low dielectric constant material. This method comprises the following steps: (a) mixing 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (DFMTFB), a bromination agent, and a solvent (with or without) to form a mixture; (b) heating the mixture under UV radiation; and (c) purifying the resultant to obtain 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (BFTFB) with high purity.Type: ApplicationFiled: July 29, 2008Publication date: July 2, 2009Applicants: Chung-shan Institute of Science and Technology. Armaments Bureau. M.N.D., Yuan-Shin Materials Technology Corp.Inventors: Chuan-Yu Chou, Po-Chen Chang, Chun-Hsu Lin, Shieh-Jun Wang
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Patent number: 7544846Abstract: A method for producing 1,4-bis(difluoromethyl)tetrafluorobenzene is disclosed, which has the following steps: (a) mixing 1,4-bis(dichloromethyl)tetrafluorobenzene, a catalyst, an aprotic polar solvent, and an alkali metal fluoride to form a reaction mixture; (b) heating the reaction mixture; and (c) purifying the resultant to obtain 1,4-bis(difluoromethyl)tetrafluorobenzene.Type: GrantFiled: July 29, 2008Date of Patent: June 9, 2009Assignees: Yuan-Shin Materials Technology Corp., Chung-Shan Institute of Science and Technology, Armaments Bureau, M.N.D.Inventors: Chun-Hsu Lin, Chac-Chou Tu, Chan-Yuan Ho, Chuan-Yu Chou, Wei-Hsiung Ou, Shieh-Jun Wang
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Patent number: 7405331Abstract: The process for producing a (fluoroalkyl)benzene derivative according to the present invention comprises a step of reducing the total content of group 3 to group 12 transition metals in an alkylbenzene derivative to 500 ppm or less in terms of metal atoms; a step of halogenating the branched alkyl group of the purified alkylbenzene derivative by a photohalogenation to obtain a (haloalkyl)benzene derivative; and a step of subjecting the (haloalkyl)benzene derivative to a halogen-fluorine exchange using HF in an amount of 10 mol or higher per one mole of the (haloalkyl)benzene derivative. The (fluoroalkyl)benzene derivative produced by the process is reduced in the content of impurities such as residual halogens and residual metals, and is useful as intermediates for functional chemical products for use in applications such as medicines and electronic materials.Type: GrantFiled: April 24, 2003Date of Patent: July 29, 2008Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Toshio Hidaka, Norio Fushimi, Takafumi Yoshimura, Takeshi Kawai
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Patent number: 7247733Abstract: The present invention relates to the preparation of nuclear-fluorinated aromatics by reacting, with a fluoride at 40 to 260° C., an aromatic compound substituted at the nucleus with halogen that is exchangeable for fluorine in the presence of at least one compound of the formula (I) where A, B, and An? have the meanings specified in the disclosure.Type: GrantFiled: June 9, 2005Date of Patent: July 24, 2007Assignee: Lanxess Deutschland GmbHInventors: Marielouise Henrich, Albrecht Marhold, Alexander Kolomeitsev, Gerd Röschenthaler
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Patent number: 7214838Abstract: A method for transferring TCPX (?, ?, ??, ??-tetrachloro-p-xylene) into TFPX (?, ?, ??, ??-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a first reactant comprising TFPX; (b) mixing the first reactant with alkali metal fluorides, TCPX and phase transfer catalyst(s) to form a mixture, wherein the alkali metal fluorides is KF, CsF, NaF, LiF or the combination thereof, the phase transfer catalyst(s) is quaternary ammonium salt, quaternary phosphonium salt or the combination thereof; and (c) heating the mixture.Type: GrantFiled: July 27, 2005Date of Patent: May 8, 2007Assignee: Yuan-Shin Materials Technology Corp.Inventors: Chun-Hsu Lin, Jao-Jou Tu, Te-Po Liou, Shieh-Jun Wang
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Patent number: 7173159Abstract: A method for the synthesis of TFPX (?, ?, ??, ??-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a sulpholane solution comprising TCPX (?, ?, ??, ??-tetrachloro-p-xylene); (b) mixing the sulpholane solution with alkali metal fluoride, and phase transfer catalyst to form a mixture, wherein the phase transfer catalyst is quaternary phosphonium salt; and (c) heating the mixture.Type: GrantFiled: July 27, 2005Date of Patent: February 6, 2007Assignee: Yuan-Shin Materials Technology Corp.Inventors: Chan-Yuan Ho, Tsair-Feng Lin, Chun-Hsu Lin, Shieh-Jun Wang
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Patent number: 7145046Abstract: Inorganic and organic compounds containing fluorine can be produced, for example, from corresponding chlorine-containing compounds by chlorine/fluorine exchange using fluorinating agents. Monocyclic or bicyclic compounds containing at least two nitrogen atoms, at least one of which is incorporated into the ring system, can be used as catalysts or fluorinating agents for chlorine/fluorine exchange reactions to produce sulfurylchlorofluoride, sulfurylfluoride or a carboxylic acid fluoride. It is likewise possible to carry out HF addition to unsaturated carbon-carbon bonds or chlorine/fluorine exchange at carbon atoms. For example, monochloro or dichloro malonic acid esters can be converted to difluoro malonic acid esters. Work-up of the reaction mixture can be simplified by using suitable solvents which force the reaction mixture to exist in two phases.Type: GrantFiled: August 1, 2003Date of Patent: December 5, 2006Assignee: Solvay Fluor und Derivate GmbHInventors: Max Braun, Carsten Brosch
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Patent number: 7091362Abstract: The present invention relates to the preparation of nuclear-fluorinated aromatics by reacting, with a fluoride at 40 to 260° C., an aromatic compound substituted at the nucleus with halogen that is exchangeable for fluorine in the presence of at least one compound of the formula (I) where A, B, and Any have the meanings specified in the disclosure.Type: GrantFiled: June 12, 2002Date of Patent: August 15, 2006Assignee: Bayer AktiengesellschaftInventors: Marielouise Henrich, Albrecht Marhold, Alexander Kolomeitsev, Gerd Röschenthaler
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Patent number: 6784327Abstract: A process for the production of a fluorinated organic compound, characterized by fluorinating an organic compound having a hydrogen atoms using IF5; and a novel fluorination process for fluorinating an organic compound having a hydrogen atoms by using a fluorinating agent containing IF5 and at least one member selected from the group consisting of acids, bases, salts and additives.Type: GrantFiled: December 10, 2002Date of Patent: August 31, 2004Assignee: Daikin Industries, Ltd.Inventors: Norihiko Yoneda, Tsuyoshi Fukuhara, Kazuhiro Shimokawa, Kenji Adachi, Satoshi Oishi
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Publication number: 20030036667Abstract: The present invention relates to the preparation of nuclear-fluorinated aromatics by reacting, with a fluoride at 40 to 260° C.Type: ApplicationFiled: June 12, 2002Publication date: February 20, 2003Inventors: Marielouise Henrich, Albrecht Marhold, Alexander Kolomeitsev, Gerd Roschenthaler
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Patent number: 6395700Abstract: Compounds each having a —CH2—CHF— group and a number of carbon atoms of 4 or above are prepared by hydrogenating a compound having a —CCl═CF— group and a number of carbon atoms of 4 or above in the presence of a noble metal catalyst in a liquid or gas phase. The compound having a —CCl═CF— group and a number of carbon atoms of 4 or above is preferably a C4-C10 alicyclic one, and can be prepared by reacting a compound having a —CCl═CCl— group and a number of carbon atoms of 4 or above with a fluorinating agent.Type: GrantFiled: June 23, 2000Date of Patent: May 28, 2002Assignee: Nippon Zeon Co., Ltd.Inventors: Toshiro Yamada, Takashi Uruma, Tatsuya Sugimoto
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Patent number: 6284933Abstract: A method of making TFPX using an SN2 type nucleophilic displacement reaction. The method includes reacting a nucleophilic fluorine molecule with a nonfluorinated-tetrahalo-p-xylene molecule. Exemplary nucleophilic fluorine molecules include, but are not limited to, CsF, KF, NaF and LiF. The nonfluorinated-tetrahalo-p-xylene molecules may include, &agr;,&agr;,&agr;′,&agr;′-tetrachloro-p-xylene, &agr;,&agr;,&agr;′,&agr;′-tetrabromo-p-xylene or &agr;,&agr;,&agr;′,&agr;′-tetraiodo-p-xylene. The reaction may be carried out in an open or closed container. Furthermore, the reaction may be carried out in the presence of a phase transfer catalyst. In certain embodiments, the reaction is carried in a substantially solvent-free environment.Type: GrantFiled: December 6, 1996Date of Patent: September 4, 2001Inventors: William R. Dolbier, Jr., Xiao X. Rong, Walter E. Stalzer
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Patent number: 6166272Abstract: Disclosed is a method of fluorinating a substrate having the general formula ##STR1## where each R is independently selected from halogen, alkyl from C.sub.1 to C.sub.12, aryl from C.sub.6 to C.sub.12, alkoxide from C.sub.1 to C.sub.12, aryloxide from C.sub.6 to C.sub.12, nitro, amino, alkylamino from C.sub.1 to C.sub.12, and arylamino from C.sub.6 to C.sub.12, each X is independently selected from halogen and at least one X is chlorine or bromine, each m is independently selected from 0 to 5, n is 0 or 1, p is 0 or 1, q is 0 or 1, and n+p+q is 1. The substrate is heated to a temperature of about 40 to about 100.degree. C. and is reacted with a fluorinating agent in the presence of about 0.05 to about 2 wt % molybdenum trioxide. The composition of the substrate, the catalyst, and the fluorinating agent is also disclosed.Type: GrantFiled: August 12, 1999Date of Patent: December 26, 2000Assignee: Occidental Chemical CorporationInventor: Sanjay Mandal
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Method for synthesis of hydrocarbon compounds containing fluorine on at least one alkyl chain carbon
Patent number: 6166271Abstract: The invention features a useful method for the synthesis of fluorinated derivatives. It is characterized in that it comprises at least one step in which a substrate comprising one sp.sup.3 hybridizing halogenophore carbon bearing at least two halogens, at least one of which is a halogen of an atomic number higher than that of fluorine, which halogenophore carbon is coupled to at least one weak hybridization atom bearing an unsaturation, is subjected to the action of one reagent comprising at least one defined compound selected among those constituted by the association of one Bronstedt base with a defined number n of hydrofluoric acid, n being at least 3 and at most 20, advantageously 15, preferably 10. This invention is useful in organic synthesis.Type: GrantFiled: January 19, 1999Date of Patent: December 26, 2000Assignee: Rhodia ChimieInventor: Laurent Saint-Jalmes -
Patent number: 6093858Abstract: The invention relates to a method for producing a bis(trifluoromethyl)benzene. This method includes the steps of (a) chlorinating a compound represented by the general formula (1) by chlorine, thereby to produce a trichloromethyltrifluoromethylbenzene; and (b) fluorinating the tricbloromethyltrifluoromethylbenzene by hydrogen fluoride, thereby to produce the bis(trifluoromethyl)benzene, ##STR1## where m is 1, 2 or 3. It is not necessary in the invention to handle solid in any reaction step.Type: GrantFiled: April 27, 1999Date of Patent: July 25, 2000Assignee: Central Glass Company, LimitedInventors: Michio Ishida, Makoto Koide, Yutaka Katsuhara
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Patent number: 5487846Abstract: A general-purpose organic rust initiator which can effectively prevent corrosion of metals comprising a compound of formula (1): ##STR1## wherein R.sub.1 is a perfluoroalkyl group having 1 to 6 carbon atoms; R.sub.2 is a hydrogen atom or a group defined for R.sub.1 ; R.sub.4 is an acid group selected from --OH, --COOH, --SH, --SO.sub.2 OH, --PO(OH).sub.2, --SCH.sub.2 COOH, --SO.sub.2 NHCH.sub.2 COOH or a salt thereof; R.sub.3 is a hydrogen atom or a group defined for R.sub.4 ; or R.sub.3 and R.sub.4 together form an acid group selected from --N.dbd.N--NH--, --CH.dbd.N--N--, --SO.sub.2 --NH--CO--, --S--C(SH).dbd.N-- or a salt thereof.Type: GrantFiled: October 4, 1994Date of Patent: January 30, 1996Assignee: Union Chemical Co., Ltd.Inventor: Shigeru Otomo
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Patent number: 5334788Abstract: Substrate compounds are reacted by passing them through an eductor with fluorine gas optionally in the presence of a liquid medium and preferably in a loop reactor with cooling means thereby providing rapid but controlled reaction suitable for industrial scale production. Vinylidene chloride, for example, smoothly produces dichlorodifluoroethane and dichlorotrifluoroethane in good yield.Type: GrantFiled: May 1, 1992Date of Patent: August 2, 1994Assignee: PCR Group, Inc.Inventors: Keith B. Baucom, Adam C. Alty, Earl J. Kimmel
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Patent number: 5233104Abstract: Aromatic compound are trifluoromethylated by reaction in the vapor phase with a dihalodifluoromethane in the presence of a copper/copper fluoride catalyst.Type: GrantFiled: August 27, 1992Date of Patent: August 3, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Donald D. May
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Patent number: 5177275Abstract: Substrate compounds are reacted by passing them through an eductor with fluorine gas optionally in the presence of a liquid medium and preferably in a loop reactor with cooling means thereby providing rapid but controlled reaction suitable for industrial scale production. Vinylidene chloride, for example, smoothly produces dichlorodifluoroethane and dichlorotrifluoroethane in good yield.Type: GrantFiled: May 1, 1989Date of Patent: January 5, 1993Assignee: PCR Group, Inc.Inventors: Keith B. Baucom, Adam C. Alty, Earl J. Kimmel
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Patent number: 4966988Abstract: A method is provided for forming (3-trifluoromethylphenyl)acetonitrile through the intermediate .alpha.,.alpha.,.alpha.-trifluoro-.alpha.'-chloro-m-xylene. This intermediate is formed by selective chlorination of .alpha.,.alpha.,.alpha.'-trichloro-m-xylene under conditions which maximize yield and minimize the formation of undesired, non-recyclable chlorinated by-products.Type: GrantFiled: February 17, 1989Date of Patent: October 30, 1990Assignee: Chevron Research CompanyInventors: William L. Schinski, Peter Denisevich, Jr.
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Patent number: 4876404Abstract: Dichlorotrifluoromethyltoluenes useful in producing some medicines and agricultural chemicals are formed with good yields by reacting dichlorotrichloromethyltoluenes with hydrogen fluoride usually at 0.degree.-100.degree. C. under pressure of 3-20 kg/cm.sup.2. Besides known 3,4-dichloro-6-trifluoromethyltoluene and 3,4-dichloro-5-trifluoromethyltoluene, novel isomers are also obtained by this method.Type: GrantFiled: August 11, 1987Date of Patent: October 24, 1989Assignee: Central Glass Company, LimitedInventors: Takeshi Kondo, Toshikazu Kawai, Hideki Oshio
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Patent number: 4780559Abstract: A method for the preparation of organic fluorides which comprises reacting a quaternary phosphonium fluoride or bifluoride with an organic substrate having at least one atom or group capable of being replaced by a fluorine atom.Type: GrantFiled: January 1, 1986Date of Patent: October 25, 1988Assignee: Imperial Chemical Industries PLCInventors: Stephen J. Brown, James H. Clark
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Patent number: 4680406Abstract: A novel apparatus and a process for fluorinating organic compounds from halogen-containing organic compounds is disclosed.Type: GrantFiled: October 15, 1985Date of Patent: July 14, 1987Assignee: The Dow Chemical CompanyInventor: George S. Fujioka
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Patent number: 4631151Abstract: A fluorine-containing aromatic derivative is produced by causing a di(haloacyl)peroxide to react upon benzene, a mono-substituted benzene, naphthalene, or a mono-substituted naphthalene thereby introducing an X(CF.sub.2).sub.n -group into the benzene ring or the naphthalene ring.Type: GrantFiled: February 19, 1985Date of Patent: December 23, 1986Assignee: Nippon Oil & Fars Co., Ltd.Inventors: Michio Kobayashi, Masato Yoshida, Hideo Sawada, Hidehiko Hagii, Kazuyoshi Aoshima
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Patent number: 4582935Abstract: Disclosing a process for making meta-aminobenzotrifluoride comprising:reacting meta-nitrobenzotrichloride with hydrogen fluoride in the presence of ammonium ions under a pressure of at least about 35 psig and at a temperature of at least about 55.degree. C. for sufficient time in the presence of water and a metal catalyst to form meta-aminobenzotrifluoride, wherein the amount of water added is at least one mole percent of the meta-nitrobenzotrichloride.Type: GrantFiled: December 21, 1984Date of Patent: April 15, 1986Assignee: Olin CorporationInventor: Max M. Boudakian
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Patent number: 4575571Abstract: A process for the stimulaneous halogenation and fluorination of aromatic derivatives substituted by at least one group containing a halogenoalkyl unit. The aromatic derivative is reacted with the halogen in liquid hydrofluoric acid. The products obtained are useful as intermediates for the synthesis of compounds having a plant-protecting or pharmaceutical activity.Type: GrantFiled: June 22, 1984Date of Patent: March 11, 1986Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Michel Desbois, Camille Disdier
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Patent number: 4568700Abstract: There is provided a process for the production of halomethylating agents which are of low volatility; and a process for the halomethylation of aromatic substrates and aromatic polymeric substances. Among products produced from the halomethylaryl polymers there are anion exchange resins.Type: GrantFiled: August 22, 1983Date of Patent: February 4, 1986Assignee: Yeda Research and Development Co. Ltd.Inventors: Abraham Warshawsky, Abraham Deshe
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Patent number: 4513154Abstract: A process for consecutive-competitive gas phase halogenation of organic compounds, i.e. alkanes, alkenes and benzene, alkyl benzenes and alkenyl benzenes containing labile hydrogens and having no more than 12 and 9 carbon atoms, respectively, in a thin reaction film on the surface of a porous barrier for production of highly halogenated products by substantial suppression of diffusion of partially halogenated intermediates away from the reaction film is disclosed.Type: GrantFiled: July 28, 1980Date of Patent: April 23, 1985Assignee: Allied CorporationInventor: Bruce E. Kurtz
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Patent number: 4462937Abstract: This invention relates to a continuous process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or tribromo-methylbenzenes with hydrofluoric acid. The process is characterized by passing an ascending stream of gaseous hydrofluoric acid, countercurrently through a plurality of mobile successive liquid layers of the trichloro- or tribromo-methylbenzenes.Type: GrantFiled: March 12, 1981Date of Patent: July 31, 1984Assignee: Rhone-Poulenc IndustriesInventors: Ramanadin, Laurent Seigneurin
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Patent number: 4438088Abstract: The invention disclosed herein is a method for preparing antimony trifluorodichloride whereby antimony trifluoride is dispersed in a liquid organic medium to form a slurry and contacted with chlorine. The invention further comprises a process for fluorinating a fluorinatable hydrocarbon or halocarbon whereby a fluorinatable hydrocarbon or halocarbon is contacted with the antimony trifluorodichloride prepared in the above process, and the fluorinated product is distilled off.Type: GrantFiled: March 11, 1982Date of Patent: March 20, 1984Assignee: The Dow Chemical CompanyInventor: John D. Weaver
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Patent number: 4436942Abstract: A process for the preparation of compounds of the formula ##STR1## which comprises contacting compounds of the formula ##STR2## wherein n is 0 to 5, andm is 1 to 3in the vapor phase, with hydrogen fluoride in the presence of a granular, porous high surface area catalyst prepared by treating .alpha.-alumina with hydrogen fluoride.Type: GrantFiled: April 30, 1979Date of Patent: March 13, 1984Assignee: Occidental Chemical CorporationInventors: Charles G. Rader, Stephen Robota
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Patent number: 4400563Abstract: A process for preparing perfluoro(lower)alkylbenzenes and derivatives thereof which comprises contacting a lower alkylbenzene or the corresponding derivative with hydrogen fluoride in the presence of chlorine in the gaseous phase at an elevated temperature to give the corresponding perfluoro(lower)alkylbenzene or its derivative thereof.Type: GrantFiled: June 20, 1979Date of Patent: August 23, 1983Assignee: Daikin Kogyo Co., Ltd.Inventors: Yohnosuke Ohsaka, Uji Hiramatsu, Toshihide Honda
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Patent number: 4393257Abstract: A process for preparing benzotrifluoride or derivatives thereof by contacting benzotrichloride or the corresponding derivatives with hydrogen fluoride in a gaseous phase in the absence of any catalyst, the contact being carried out in the presence of chlorine at an elevated temperature so as to accelerate the reaction rate.Type: GrantFiled: June 20, 1979Date of Patent: July 12, 1983Assignee: Daikin Kogyo Co., Ltd.Inventors: Tsuneo Nakagawa, Uji Hiramatsu, Toshihide Honda
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Patent number: 4367350Abstract: A process for preparing perfluoro(lower)alkylbenzenes and derivatives thereof which comprises contacting a lower alkylbenzene or the corresponding derivative with hydrogen fluoride in the presence of chlorine in a gaseous phase at an elevated temperature to give the corresponding perfluoro(lower)alkylbenzene or its derivative.Type: GrantFiled: December 27, 1977Date of Patent: January 4, 1983Assignee: Daikin Kogyo Co., Ltd.Inventors: Uji Hiramatsu, Toshihide Honda, Yohnosuke Ohsaka
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Patent number: 4365101Abstract: A process for preparing benzotrifluoride or derivatives thereof by contacting benzotrichloride or the corresponding derivative with hydrogen fluoride in a gaseous phase in the absence of any catalyst, the contact being carried out in the presence of chlorine at an elevated temperature so as to accelerate the reaction rate.Type: GrantFiled: December 12, 1977Date of Patent: December 21, 1982Assignee: Daikin Kogyo Co., Ltd.Inventors: Tsuneo Nakagawa, Uji Hiramatsu, Toshihide Honda
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Patent number: 4362884Abstract: Organosilicon compounds referred to as silacrown ethers or "silacrowns" are of the general formula: ##STR1## where R.sup.1 and R.sup.2 are organic radicals or hydrogen and n is an integer between 4 and 10 inclusive. Silacrown ethers are prepared by reacting polyethylene glycol with substituted silanes under conditions promoting cyclization over polymerization. Silacrown ethers may be employed as phase-transfer catalysts in solution or immobilized on siliceous supports.Type: GrantFiled: November 23, 1981Date of Patent: December 7, 1982Assignee: Petrarch Systems, Inc.Inventor: Barry C. Arkles
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Patent number: 4242286Abstract: A process for preparing bentotrifluoride or its derivatives by contacting benzotrichloride or its derivatives corresponding thereto with hydrogen fluoride in a gaseous phase, characterized in that the contact is carried out in the presence of aluminum fluoride and, if desired, of chlorine.Type: GrantFiled: March 22, 1979Date of Patent: December 30, 1980Assignee: Daikin Kogyo Co., Ltd.Inventor: Yohnosuke Ohsaka