Catalyst Utilized Patents (Class 570/208)
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Patent number: 12082988Abstract: The present disclosure relates to a coating method of implant using parylene, for coating a surface of a dental implant, including a pretreating step of pretreating the implant; and a coating step of coating a surface of the pretreated implant with a coating material to form a polymer coating layer, wherein the coating material is provided as parylene.Type: GrantFiled: August 26, 2021Date of Patent: September 10, 2024Assignee: UNIDENTAL CO., LTD.Inventor: Sung Joon Yang
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Patent number: 11542170Abstract: The present invention relates to a process for the calcination of a zeolitic material, wherein said process comprises the steps of (i) providing a zeolitic material comprising YO2 and optionally further comprising X2O3 in its framework structure in the form of a powder and/or of a suspension of the zeolitic material in a liquid, wherein Y stands for a tetravalent element and X stands for a trivalent element; (ii) atomization of the powder and/or of the suspension of the zeolitic material provided in (i) in a gas stream for obtaining an aerosol; (iii) calcination of the aerosol obtained in (ii) for obtaining a calcined powder; as well as to a zeolitic material obtainable and/or obtained according the inventive process, and to its use as a molecular sieve, as an adsorbent, for ion-exchange, as a catalyst, and/or as a catalyst support.Type: GrantFiled: March 31, 2021Date of Patent: January 3, 2023Assignee: BASF SEInventors: Benedikt Kalo, Thomas Geiger, Rene Koenig, Ulrich Mueller, Stefan Maurer
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Patent number: 11111207Abstract: The present invention disclosed an improved one pot, one step process for halogenation of compound of formula (II) to afford corresponding halogenated compound of formula (I) having improved yield and increased selectivity under very mild conditions.Type: GrantFiled: March 17, 2017Date of Patent: September 7, 2021Assignee: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCHInventors: Shubhangi Bhalchandra Umbarkar, Atul Balasaheb Kulal, Amar Jaywant Deshmukh
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Patent number: 8771605Abstract: Use of a high shear mechanical device incorporated into a process for the production of chlorobenzene is capable of decreasing mass transfer limitations, thereby enhancing the chlorobenzene production process. A system for the production of chlorobenzene from benzene and chlorine, the system comprising a reactor and an external high shear device, the outlet of which is fluidly connected to the inlet of the reactor; the high shear device capable of providing an emulsion of chlorine gas bubbles within liquid benzene.Type: GrantFiled: March 31, 2010Date of Patent: July 8, 2014Assignee: H R D CorporationInventors: Abbas Hassan, Ebrahim Bagherzadeh, Rayford G. Anthony, Gregory G. Borsinger, Aziz Hassan
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Patent number: 8524957Abstract: To provide a novel process for producing p-dichlorobenzene satisfying both of high selectivity of p-dichlorobenzene and high conversion of chlorine at the same time.Type: GrantFiled: October 23, 2009Date of Patent: September 3, 2013Assignee: Tosoh CorporationInventor: Tsuyoshi Okamoto
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Patent number: 8334417Abstract: The present invention relates to a novel process for preparing chloro- or bromoaromatics of the formula (II) by diazotizing the formula (I) by means of sodium nitrite or potassium nitrite in the presence of aqueous hydrochloric or hydrobromic acids and then reacting with an iron(II) or iron(III) compound, optionally in the presence of additional amounts of hydrogen chloride or hydrogen bromide or alkali metal or alkaline earth metal chlorides or bromides.Type: GrantFiled: March 9, 2010Date of Patent: December 18, 2012Assignee: Bayer Cropscience AGInventor: Thomas Himmler
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Publication number: 20110207976Abstract: To provide a novel process for producing p-dichlorobenzene satisfying both of high selectivity of p-dichlorobenzene and high conversion of chlorine at the same time.Type: ApplicationFiled: October 23, 2009Publication date: August 25, 2011Inventor: Tsuyoshi Okamoto
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Patent number: 7863209Abstract: A method for recovering and reusing a ring-halogenation catalyst comprises: (A) contacting an aromatic compound with chlorine or bromine in the presence of a catalyst composition, where the catalyst composition comprises at least one salt comprising a Group 4-13 metal, a lanthanide metal, or an actinide metal; and at least one organic counterion derived from an organic acid having a pKa relative to water of 0 or greater; and at least one organic sulfur compound; to form a first product mixture comprising a monochloro or a monobromo aromatic compound and a Group 4-13 metal halide, a lanthanide metal halide or an actinide metal halide; (B) separating the metal halide from the first product mixture; and (C) contacting at least a portion of the metal halide and an aromatic compound with chlorine or bromine, and at least one organic sulfur compound; to form a second product mixture comprising a monochloro or a monobromo aromatic compound and a Group 4-13 metal halide, a lanthanide metal halide or an actinide metalType: GrantFiled: June 16, 2004Date of Patent: January 4, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Balakrishnan Ganesan, Pradeep Jeevaji Nadkarni, Robert Edgar Colborn, Dan Hancu
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Patent number: 7763760Abstract: A method for ring-halogenating an aromatic compound comprises contacting with chlorine or bromine, a mixture comprising the aromatic compound and a mixed copper salt of formula Cu(Y)X, where Y comprises a counterion derived from an organic acid, where the organic acid has a pKa relative to water of 0 or greater; and X comprises Cl, Br, I, or (SO42?)1/2; to produce a reaction mixture comprising a haloaromatic compound and a copper(II) halide residue.Type: GrantFiled: June 16, 2004Date of Patent: July 27, 2010Assignee: SABIC Innovative Plastics IP B.V.Inventors: Balakrishnan Ganesan, Pradeep Jeevaji Nadkarni
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Publication number: 20090216017Abstract: A process for producing a biaryl compound, characterized by reacting an arylhydrazine compound, hydrogen peroxide and an aryl compound. When the reaction is conducted in the presence of a given metal or a compound of the metal or in the presence of a metal oxide obtained by reacting the given metal or a compound of the metal with hydrogen peroxide, then the yield of the biaryl compound is improved.Type: ApplicationFiled: May 1, 2009Publication date: August 27, 2009Inventor: Koji HAGIYA
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Publication number: 20090005619Abstract: Use of a high shear mechanical device incorporated into a process for the production of chlorobenzene is capable of decreasing mass transfer limitations, thereby enhancing the chlorobenzene production process.Type: ApplicationFiled: June 11, 2008Publication date: January 1, 2009Applicant: H R D CORPORATIONInventors: Abbas Hassan, Ebrahim Bagherzadeh, Rayford G. Anthony, Gregory Borsinger, Aziz Hassan
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Publication number: 20080114196Abstract: The present invention relates to a process for preparing chlorinated or partly chlorinated carbonyl compounds, which comprises reacting unchlorinated or partly chlorinated carbonyl compounds with a chlorinating agent in a jet loop reactor.Type: ApplicationFiled: November 13, 2007Publication date: May 15, 2008Applicant: WACKER CHEMIE AGInventors: Dirk Kutschera, Franz-Xaver Riener, Michael Schlueter
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Patent number: 7358407Abstract: This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically treated to provide a high quality decabromodiphenylethane product.Type: GrantFiled: October 17, 2006Date of Patent: April 15, 2008Assignee: Albemarle CorporationInventors: John C. Parks, David H. Knoebel, Lawrence M. Jenkins, George H. Ransford, Gary L. Bowman, Jr., Saadat Hussain
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Publication number: 20080058458Abstract: This invention provides a process of preparing reaction-derived decahalodiphenylethane of high purity. The process comprises cofeeding separate feeds of (a) diphenylethane and (b) bromine chloride, bromine chloride and bromine, or bromine chloride and chlorine to a refluxing reaction mixture comprising bromine and at least one Lewis acid bromination catalyst so that high purity decahalodiphenylethane is formed.Type: ApplicationFiled: August 17, 2007Publication date: March 6, 2008Applicant: ALBEMARLE CORPORATIONInventors: Alvin E. Harkins, James E. Boone
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Patent number: 7179950Abstract: This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically treated to provide a high quality decabromodiphenylethane product.Type: GrantFiled: June 20, 2005Date of Patent: February 20, 2007Assignee: Albemarle CorporationInventors: John C. Parks, David H. Knoebel, Lawrence M. Jenkins, George H. Ransford, Gary L. Bowman, Jr., Saadat Hussain
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Patent number: 7084317Abstract: A process for the halogenation of an aromatic compound wherein the aromatic compound is admixed with a halogenating agent in the presence of an ionic liquid is described. The method in preferably halide, sulfur or nitrate ionic liquids has significant advantages over conventional halogenation reactions. These are that the reaction starts with, e.g., a halide salt rather than, e.g., a halogen, and is therefore more convenient and safer. Also, when the reaction is performed in a nitrate ionic liquid, the only by-product is water.Type: GrantFiled: October 5, 2001Date of Patent: August 1, 2006Assignee: The Queen's University of BelfastInventors: Martyn John Earle, Suhas Prabhakar Katdare
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Patent number: 7012166Abstract: Aromatic compounds such as toluene and o-xylene are chlorinated in the presence of a catalyst combination prepared by combining (A) at least one salt comprising a metal selected from the group consisting of a Group 4–12 metal, a lanthanide and an actinide; and a counterion; and (B) at least one organic sulfur compound, preferably phenothiazine-N-carbonyl chloride. The catalyst combination may include reaction products of (A) and (B). Under these conditions, production of the p-chloro isomer is optimized. In some embodiments said counterion is an organic counterion derived from at least one acidic organic compound selected from the group consisting of those with an approximate pKa value relative to water of at least about 3.Type: GrantFiled: March 18, 2003Date of Patent: March 14, 2006Assignee: General Electric CompanyInventors: Dan Hancu, Robert Edgar Colborn, Richard Joseph Kilmer
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Patent number: 6974887Abstract: This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically treated to provide a high quality decabromodiphenylethane product.Type: GrantFiled: May 14, 2004Date of Patent: December 13, 2005Assignee: Albemarle CorporationInventors: John C. Parks, David H. Knoebel, Lawrence M. Jenkins, George H. Ransford, Gary L. Bowman, Jr., Saadat Hussain
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Patent number: 6930216Abstract: A method for the nuclear chlorination of ortho-xylene using a chlorinating agent in the presence of at least one Friedel-Crafts catalyst and chloro-substituted 2,8-dimethylphenoxathiin as co-catalyst.Type: GrantFiled: September 10, 2003Date of Patent: August 16, 2005Assignee: Clariant GmbHInventors: Karl-Ernst Mack, Hans-Jürgen Leitung, Daniel Decker
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Patent number: 6841707Abstract: A method of producing decabromodiphenyl alkanes includes the steps of charging a reaction vessel with bromine and a bromination catalyst and introducing a diphenyl alkane into the vessel at a location above the level of the charge bromine and catalyst. A dip tube apparatus for introducing the diphenyl alkane includes an inner tube and an outer tube, each of which are disposed above the surface of the bromine reaction vessel. The inner tube is fitted with a plug having an opening. Diphenyl alkane flows through the inner tube, out the opening in the plug, and into the reactor. The outer tube is disposed around and along the inner tube. Reaction mass from the vessel is recirculated from the vessel, through the outer tube and back to the vessel so as to form a curtain of reaction mass around the stream of diphenyl alkane being simultaneously fed into the reaction vessel.Type: GrantFiled: December 18, 2002Date of Patent: January 11, 2005Assignee: Pabu Services, Inc.Inventors: Stephen B. Falloon, Samuel Mulligan, Donavon W. McElveen, Ray W. Atwell
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Patent number: 6768033Abstract: This invention relates to a novel process which comprises feeding a mixture formed from disphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically treated to provide a high quality decabromodiphenylethane product.Type: GrantFiled: May 27, 2003Date of Patent: July 27, 2004Assignee: Albemarle CorporationInventors: John C. Parks, David H. Knoebel, Lawrence M. Jenkins, George H. Ransford, Gary L. Bowman, Jr., Saadat Hussain
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Patent number: 6710217Abstract: The invention relates to a process for preparing 4-chlorobiphenyl by (a) reacting biphenyl and chlorine in the presence of one or more ring-chlorination catalysts, and (b) subjecting the reaction mixture obtained in step (a) to fractional distillation to obtain 4-chlorobiphenyl.Type: GrantFiled: November 13, 2001Date of Patent: March 23, 2004Assignee: Bayer AktiengesellschaftInventors: Reinhard Langer, Alexander Klausener, Paul Wagner, Lothar Puppe
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Patent number: 6706934Abstract: Disclosed herein is a method for producing 2,3,4,5-tetrachlorobenzotrifluoride comprising chlorinating 4-chlorobenzotrifluoride with elemental chlorine, in the presence of from 0.1 to 2% by weight of iron(III) chloride and 0.05 to 0.75% by weight of aluminum(III) chloride, in each case based on 4-chlorobenzotrifluoride, where the weight ratio of iron(III) chloride to aluminum(III) chloride is 10:1 to 1:1.Type: GrantFiled: September 26, 2002Date of Patent: March 16, 2004Assignee: Bayer AktiengesellschaftInventors: Franz-Josef Mais, Helmut Lahr
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Patent number: 6603049Abstract: This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economicaly treated to provide a high quality decabromodiphenylethane product.Type: GrantFiled: August 21, 2002Date of Patent: August 5, 2003Assignee: Albemarle CorporationInventors: John C. Parks, David H. Knoebel, Lawrence M. Jenkins, George H. Ransford, Gary L. Bowman, Jr., Saadat Hussain
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Patent number: 6518468Abstract: This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically treated to provide a high quality decabromodiphenylethane product.Type: GrantFiled: June 4, 1996Date of Patent: February 11, 2003Assignee: Albemarle CorporationInventors: John C. Parks, David H. Knoebel, Lawrence M. Jenkins, George H. Ransford, Gary L. Bowman, Jr., Saadat Hussain
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Patent number: 6426440Abstract: The work-up of the gaseous products from the thermal cracking of 1,2-dichloroethane is simplified if the cracking gases are cooled to a temperature range of about 150 to 180° C., only a subsidiary proportion, which comprises all the coke formed, being condensed and fed to a separate work-up.Type: GrantFiled: December 26, 2000Date of Patent: July 30, 2002Assignee: Vinnolit Monomer GmbH & Co. KGInventors: Thomas Wild, Juergen Eichler, Werner Strang, Peter Widmann
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Patent number: 6225514Abstract: Disclosed is a method of halogenating the ring of an aromatic compound. The aromatic compound is contacted with a halogenating agent in the presence of a heterogeneous catalyst. The catalyst is the calcination reaction product of: (A) 51 to 99 wt % of a support which comprises at least one inorganic oxide or hydroxide of at least one metal that is at least divalent and forms a metal-to-oxygen matrix during calcination; and (B) 1 to 49 wt % of at least one dopant which comprises a compound that places an element that is at least divalent, bonded to oxygen atoms, into said matrix during said calcination, resulting in the formation of an acidic solid.Type: GrantFiled: April 11, 2000Date of Patent: May 1, 2001Assignee: Occidental Chemical CorporationInventors: Charles M. Cook, Michael C. Hausladen, Michael C. Savidakis, Michael J. Fifolt
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Patent number: 6124512Abstract: Disclosed is a method of halogenating the ring of an aromatic compound. The aromatic compound is contacted with a halogenating agent in the presence of a heterogeneous catalyst. The catalyst is the calcination reaction product of:(A) 51 to 99 wt % of a support which comprises at least one inorganic oxide or hydroxide of at least one metal that is at least divalent and forms a metal-to-oxygen matrix during calcination; and(B) 1 to 49 wt % of at least one dopant which comprises a compound that places an element that is at least divalent, bonded to oxygen atoms, into said matrix during said calcination, resulting in the formation of an acidic solid.Type: GrantFiled: September 18, 1998Date of Patent: September 26, 2000Assignee: Occidental Chemical CorporationInventors: Charles M. Cook, Michael C. Hausladen, Michael C. Savidakis, Michael J. Fifolt
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Patent number: 6117278Abstract: Disclosed is a method for making high purity .alpha.-chloroxylenes. A composition is formed of about 15 to about 80 wt % of a xylene and about 20 to about 85 wt % of a solvent. The solvent can be toluene, ring halogenated toluene, benzotrichloride, ring halogenated benzotrichloride, benzotrifluoride, ring halogenated benzotrifluoride, .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexafluorometaxylene, .alpha.,.alpha.,.alpha.,.alpha.',.alpha.',.alpha.'-hexafluoroparaxylene, or a mixture thereof. The composition is heated to about 70 to about 160.degree. C. No base is present in the composition. Chlorine gas is sparged through the composition and chlorine free radicals are generated therein. The chlorine free radicals can be generated either with UV light or by means of a chlorine free radical initiator.Type: GrantFiled: December 10, 1998Date of Patent: September 12, 2000Assignee: Occidental Chemical CorporationInventors: Sanjay Mandal, Kevin R. Benson, Michael J. Fifolt, John Hickey, James Franc, George Piotrowski, William S. Derwin
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Patent number: 6084132Abstract: Fluorescent dyes which fluoresce in a variety of colors are produced from substituted and un-substituted 6-ring and 8-ring aromatic diketones by reductive alkylation with alkyl halides in the presence of zinc.Type: GrantFiled: December 3, 1999Date of Patent: July 4, 2000Assignee: Rohm and Haas CompanyInventor: Peter J. Heffron
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Patent number: 6028232Abstract: The present invention relates to a catalyst for preparing para-chloro aromatic compounds by the liquid-phase chlorination method. The catalyst is prepared by loading transition metal salts, rare earth metal salts or a mixture thereof, and alkali metal or alkaline earth metal chlorides having a melting point of 300.degree. C. or more, by solid-state method or impregnation method, into zeolite L being ion-exchanged by alkali metal. The present invention also relates to a process for preparing para-isomers of the chlorinated compounds by using the catalyst.Type: GrantFiled: September 23, 1997Date of Patent: February 22, 2000Assignee: Korea Research Institute of Chemical TechnologyInventors: Sang Eon Park, Jung Whan Yoo, Poong Man Lee
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Patent number: 5892138Abstract: A process for the preparation of 4-halocumenes is disclosed wherein the halogen in the halocumene is chlorine, bromine, or iodine, the process including the step of reacting cumene with a halogenating agent in a liquid phase in the presence of a solvent, an aliphatic carboxylic acid component, and a zeolite catalyst.Type: GrantFiled: October 23, 1997Date of Patent: April 6, 1999Assignee: Council of Scientific & Industrial ResearchInventors: Anand Pal Singh, Sushama Mohan Kale
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Patent number: 5750811Abstract: Disclosed is a method of making m-chlorobenzotrifluoride. Benzotrifluoride is reacted with chlorine gas in the presence of about 0.1 to about 5 mole % (based on benzotrifluoride) of a metal chloride which can be FeCl.sub.3, SbCl.sub.3, or AlCl.sub.3 and about 0.025 to about 5.0 mole % (based on benzotrifluoride) of a catalyst having the formula ##STR1## where Z is halogen, alkyl from C.sub.1 to C.sub.6, alkoxy from C.sub.1 to C.sub.6, or fluoroalkyl from C.sub.1 to C.sub.6, n is 0 to 5, and the molar ratio of metal chloride to cocatalyst is about 0.5 to about 4.Type: GrantFiled: April 7, 1997Date of Patent: May 12, 1998Assignee: Occidental Chemical CorporationInventors: Robert A. Buchanan, Ramesh Krishnamurti, Habib Hichri, David C. Johnson
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Patent number: 5710355Abstract: Disclosed is a method of making a chlorobenzene having the general formulas ##STR1## where X is Cl or F, and X' is X or CF.sub.3. A compound having the formula ##STR2## is sulfonated using at least 2 moles per mole of said compound of a sulfonating agent selected from the group consisting of sulfuric acid, chlorosulfonic acid, and mixtures thereof, to produce a sulfonated compound. The sulfonated compound is chlorodesulfonated to produce a chlorobenzene, such as 1,2,4-trichlorobenzene. Preferably, the starting material is ortho-dichlorobenzene.Type: GrantFiled: June 10, 1996Date of Patent: January 20, 1998Assignee: Occidental Chemical CorporationInventor: Ramesh Krishnamurti
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Patent number: 5679736Abstract: Novel fire retardant compounds are disclosed, which are poly-halogenated TMPI and MPI compounds containing three or more halogen atoms per molecule. A process for the preparation of these compounds and polymeric compositions containing them are also described.Type: GrantFiled: May 17, 1993Date of Patent: October 21, 1997Assignee: Bromine Compounds LimitedInventor: Leonard Shorr
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Patent number: 5473084Abstract: A heterogeneous catalytic chlorination process for making chlorinated aromatic compounds with high para-selectivity. Examples of chlorinated aromatic compounds that can be prepared using the process disclosed in the present invention include those compounds represented by the following formula: ##STR1## wherein R can be a C1-C3 alkyl, floride, chloride, bromide, iodide, or hydroxyl group. The chlorination process utilizes a de-aluminated zeolite which is prepared by H.sub.4 EDTA or Na.sub.4 EDTA extraction of L-type zeolite to reduce the alumina content thereof. The SiO.sub.2 /Al.sub.2 O.sub.3 ratio of the de-aluminated zeolite is preferably between about 9 and about 40. The de-aluminated zeolite can be ion-exchanged with Group IA or IIA metal ions to further improve its para-selectivity.Type: GrantFiled: June 2, 1993Date of Patent: December 5, 1995Assignee: Industrial Technology Research InstituteInventors: Shian-Jy Wang, Po-Yu Chen, Ying-Tse Chuang, Wen-Chyi Lin
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Patent number: 5369214Abstract: A method for dehalogenating halogenated polyaromatic compounds is provided wherein the polyaromatic compounds are mixed with a hydrogen donor solvent and a carbon catalyst in predetermined proportions, the mixture is maintained at a predetermined pressure, and the mixture is heated to a predetermined temperature and for a predetermined time.Type: GrantFiled: January 7, 1994Date of Patent: November 29, 1994Assignee: The United States of America as represented by the United States Department of EnergyInventors: Malvina Farcasiu, Steven C. Petrosius
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Patent number: 5324874Abstract: This invention relates to an improvement in a process for preparing a product predominant in decabromodiphenylethane. In the improved process the diphenylethane is reacted with bromine in the presence of bromination catalyst in a reaction vessel by feeding diphenylethane to the reaction vessel below the liquid level of bromine in the reaction vessel. The improvement comprises contacting diphenylethane, bromine, and catalyst at a rate sufficient to obtain a diphenylethane predominant product having enhanced color and particle size.Type: GrantFiled: August 17, 1992Date of Patent: June 28, 1994Assignee: Ethyl CorporationInventors: George H. Ransford, Phillip R. DeVrou, John C. Parks
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Patent number: 5315049Abstract: Alkylaromatics are subjected to nuclear chlorination in the liquid phase in the presence of Friedel-Crafts catalyst mixtures comprising compounds of iron and antimony and cocatalysts of the formula (II) ##STR1## wherein the substituents have the meaning given in the description.Type: GrantFiled: August 18, 1993Date of Patent: May 24, 1994Assignee: Bayer AktiengesellschaftInventors: Heinrich Schrage, Helmut Fiege
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Patent number: 5292975Abstract: When the halogen content of polyhalogenated aromatics is decreased by reaction with monohalogenated and/or non-halogenated aromatics in the gas phase, good yields and significantly improved catalyst service lives are achieved if the reaction is carried out in the presence of a catalyst and in the presence of a hydrogen halide.Type: GrantFiled: February 23, 1993Date of Patent: March 8, 1994Assignee: Bayer AktiengesellschaftInventors: Heinrich Schrage, Helmut Fiege
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Patent number: 5210343Abstract: Dichlorobenzene having an increased p-content and a greatly reduced m-content is obtained by ring chlorination of benzene or chlorobenzene in the presence of Friedel-Crafts catalysts if the reaction is carried out in the presence of co-catalysts of the formula (I) ##STR1## wherein X represents fluorine, chlorine, bromine, trifluoromethyl or pentafluoroethyl andA represents 2 hydrogen atoms or the group --CH.dbd.CH--CH.dbd.CH--.Type: GrantFiled: March 19, 1992Date of Patent: May 11, 1993Assignee: Bayer AktiengesellschaftInventors: Franz-Josef Mais, Helmut Fiege
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Patent number: 5157173Abstract: 4-chlorobenzotrichloride was prepared by the chlorination of p-xylene in the vapor phase at a temperature above about 200.degree. C. in the presence of an activated carbon catalyst and water. An approximately 75 percent calculated yield was obtained at 250.degree. C. using a wide-pore activated carbon catalyst.Type: GrantFiled: September 24, 1991Date of Patent: October 20, 1992Assignee: DowElancoInventors: Michael A. DesJardin, Clark P. Allphin
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Patent number: 5157170Abstract: The halogen of a polyhalogenated aromatic compound can be transferred to a monohalogenated or nonhalogenated aromatic compound by reaction in the presence of ruthenium as the element or in the form of compounds and if desired with one or more metal compounds from subgroups I and II of the Periodic Table.Type: GrantFiled: December 11, 1991Date of Patent: October 20, 1992Assignee: Bayer AktiengesellschaftInventors: Franz-Josef Mais, Helmut Fiege
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Patent number: 5149892Abstract: Benzene or a chlorinated benzene feedstock compound represented by the formula C.sub.6 H.sub.6-x Cl.sub.x is chlorinated in the rectifying zone of a catalytic distillation reactor to produce a chlorinated benzene product compound represented by the formula C.sub.6 H.sub.5-x Cl.sub.x+1, where x is an integer in the range of from 0 to 5.Type: GrantFiled: October 22, 1991Date of Patent: September 22, 1992Assignee: PPG Industries, Inc.Inventors: Robert E. Feathers, J. Douglas Mansell
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Patent number: 5124496Abstract: This invention relates to a white or at least near white flame retardant product which is predominant in decarbromodiphenylalkane, and which product contains a minor amount of impurities; to a process for preparation of the flame retardant product; to a process for the removal of excess bromine from the product by use of a treatment solution and elevated temperature; and to macromolecular materials utilizing the product as a flame retardant.Type: GrantFiled: November 1, 1990Date of Patent: June 23, 1992Assignee: Ethyl CorporationInventors: Mark A. Templeton, Saadat Hussain, Bonnie G. McKinnie, Robert L. Davis
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Patent number: 5105036Abstract: Aromatic hydrocarbons monosubstituted by straight-chain or branched C.sub.1 -C.sub.12 -alkyl or by Chd 3-C.sub.8 -cycloalkyl can be chlorinated in the aromatic ring in the liquid phase in the presence of Friedel-Crafts catalysts if cyclic amidines which are oxy-sustituted on the exocyclic N atom are employed as co-catalysts. An increased proportion of the p-isomer is obtained in this reaction.Type: GrantFiled: February 6, 1991Date of Patent: April 14, 1992Assignee: Bayer AktiengesellschaftInventors: Franz-Josef Mais, Helmut Fiege
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Patent number: 5053566Abstract: Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X.sup.1 and X.sup.2 independently of one another represent chlorine or bromine, preferably chlorine,X.sup.3 denotes hydrogen, chlorine or bromine, preferably hydrogen or chlorine and particularly preferably hydrogen,R.sup.1, R.sup.2 and R.sup.3 independently of one another represent hydrogen, C.sub.1 -C.sub.4 -alkyl (preferably methyl or ethyl and particularly preferably methyl), C.sub.1 -C.sub.4 -alkoxy (preferably methoxy or ethoxy and particularly preferably methoxy), fluorine, chlorine or bromine anda assumes the value zero or one,with halogenating agents, the preparation being carried out in the presence of methylene chloride or solvent mixtures essentially containing methylene chloride and in the presence of zeolites of the L structure type which contain metal cations.Type: GrantFiled: August 23, 1990Date of Patent: October 1, 1991Assignee: Bayer AktiengesellschaftInventors: Artur Botta, Hans-Josef Buysch, Lothar Puppe
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Patent number: 5053565Abstract: p-Chlorotoluene can be prepared in an improved manner by catalyzed reaction of toluene with a chlorinating agent if a zeolite L containing metal cations is employed as the catalyst and the reaction is carried out in the presence of methylene chloride and/or chloroform.Type: GrantFiled: August 23, 1990Date of Patent: October 1, 1991Assignee: Bayer AktiengesellschaftInventors: Artur Botta, Hans-Josef Buysch, Lothar Puppe
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Patent number: 5030778Abstract: This invention relates to a process for producing a product which is predominant in decabromodiphenyl alkane.Type: GrantFiled: June 4, 1990Date of Patent: July 9, 1991Assignee: Ethyl CorporationInventor: George H. Ransford
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Patent number: 5025110Abstract: Composition of solvents usable for the production of hexabromocyclododecane and methods of use of such compositions are disclosed. The compositions comprise C.sub.5 -C.sub.8 saturated aliphatic alcohols having low mutual solubility with water.Type: GrantFiled: February 6, 1990Date of Patent: June 18, 1991Assignee: Ethyl CorporationInventor: Phillip R. Beaver