Halo, 1,1-diphenylethane Or Ring Substituted Derivative Thereof Prepared (e.g., Ddt, Etc.) Patents (Class 570/192)
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Patent number: 7378449Abstract: An additive mixture useful as a flame retardant is described. The mixture is comprised of (i) a poly(bromophenyl)alkane having in the molecule in the range of 13 to 60 carbon atoms and in the range of two to four aryl groups and (ii) a poly(bromophenyl)bromoalkane having in the molecule in the range of 13 to 60 carbon atoms and in the range of two to four aryl groups, said poly(bromophenyl)bromoalkane being in an amount which is greater than 25 wt %, based on the total weight of the additive mixture. A facile process for making the poly(bromophenyl)bromoalkane is also described.Type: GrantFiled: October 23, 2006Date of Patent: May 27, 2008Assignee: Albemarle CorporationInventors: Raymond B. Dawson, Saadat Hussain
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Patent number: 7271302Abstract: The present invention relates to processes for the bromination of organic compounds, and to bromination microreactors for carrying out these processes.Type: GrantFiled: September 19, 2000Date of Patent: September 18, 2007Assignee: Merck Patent GesellschaftInventors: Kai Fabian, Joeran Stoldt, Hanns Wurziger, Norbert Schwesinger
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Patent number: 7129385Abstract: An additive mixture useful as a flame retardant is described. The mixture is comprised of (i) a poly(bromophenyl)alkane having in the molecule in the range of 13 to 60 carbon atoms and in the range of two to four aryl groups and (ii) a poly(bromophenyl)bromoalkane having in the molecule in the range of 13 to 60 carbon atoms and in the range of two to four aryl groups, said poly(bromophenyl)bromoalkane being in an amount which is greater than 25 wt %, based on the total weight of the additive mixture. A facile process for making the poly(bromophenyl)bromoalkane is also described.Type: GrantFiled: April 20, 2004Date of Patent: October 31, 2006Assignee: Albemarle CorporationInventors: Raymond B. Dawson, Saadat Hussain
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Patent number: 6861566Abstract: There is provided an industrially advantageous process for producing a 1-chloro-4-arylbutane represented by the general formula (2): wherein R represents hydrogen, lower alkyl, or lower alkoxy, characterized by reacting 1-bromo-3-chloropropane with a compound represented by the general formula (1): wherein R is as defined above; and X represents chlorine, bromine, or iodine, in a solvent.Type: GrantFiled: March 11, 2002Date of Patent: March 1, 2005Assignees: Sumitomo Chemical Company, Limited, Ono Pharmaceutical Co., Ltd.Inventors: Hiroaki Hibino, Susumu Ohtsuka, Yasunobu Miyamoto, Itsuo Okumoto
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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: 6756513Abstract: Monochlorinated hydrocarbons of high isomeric purity are prepared by a process, which comprises: reacting a monoalcohol having an alkyl radical having from 3 to 20 carbon atoms with cyanuric chloride; and purifying the resulting monochlorinated hydrocarbon by distillation after separation of salts and washing the monochlorinated hydrocarbon with alkali. The invention relates to a process for preparing monochlorinated hydrocarbons which contain an alkyl radical having from 3 to 20 carbon atoms and have a high isomeric purity by reacting a monoalcohol having a hydrocarbon radical containing an alkyl radical having from 3 to 20 carbon atoms to which additional cycloaliphatic radicals, aryl radicals, aralkyl radicals and alkylaryl radicals may be bound with cyanuric chloride, separating off salts, washing the reaction mixture with alkali and purifying the resulting monochlorinated hydrocarbons by distillation.Type: GrantFiled: August 16, 2002Date of Patent: June 29, 2004Assignee: Degussa AGInventors: Manfred Neumann, Clemens Osterholt
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Patent number: 5741949Abstract: A preferred process for producing a brominated, non-fused aromatic composition involves a continuous bromination in a continuous, mixed reactor such as a continuous stirred tank reactor. Bromine and the aromatic substrate, and optionally a bromination catalyst, are continuously fed to a reaction zone to form a reaction mixture, and the reaction mixture is continuously withdrawn from the reaction zone after an established average residence time. Bromination levels can be readily controlled by controlling the average residence time of the reaction mixture within the reaction zone. Preferred continuos processes also provide mixed, brominated compositions having product distributions which are substantially broader than that obtained by batch brominations conducted to achieve the same level of bromination. Preferred products thus have broad melting ranges which are advantageous in compounding operations.Type: GrantFiled: April 8, 1996Date of Patent: April 21, 1998Assignee: Great Lakes Chemical CorporationInventor: Art Mack
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Patent number: 5457248Abstract: Described are processes for preparing brominated diphenylalkane products which are far whiter than prior known brominated diphenylalkane products. The resultant white brominated diphenylalkane products also form a part of the present invention, as do formulations incorporating the white brominated diphenylalkane products, and articles prepared therefrom.Type: GrantFiled: April 7, 1994Date of Patent: October 10, 1995Assignee: Great Lakes Chemical Corp.Inventors: Arthur G. Mack, Rastko I. Mamuzic, David C. Sanders, Richard S. Rose, Mary G. Harscher
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Patent number: 5420369Abstract: The co-formation of diarylalkane by-product in the chloroalkylation of an aromatic compound with an aldehyde is minimized by conducting the reaction in a continuous manner in a concentration with agitation and in the presence of both hydrogen sulfate and hydrogen chloride.Type: GrantFiled: July 18, 1994Date of Patent: May 30, 1995Assignee: Albemarle CorporationInventors: R. Carl Herndon, Jr., Gary D. Focht, Karl R. Jones
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Patent number: 5268517Abstract: The preparation of Z-1,2-diarylallyl chlorides of the general formula I ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are hydrogen, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy or a substituted aromatic radical, and n and m are 1, 2 or 3, by dehydrating chlorohydrins of the formula II ##STR2## in which the radicals are as defined above, at up to 50.degree. C. in an inert ether or carboxylic acid ester as solvent and in the presence of a carboxylic anhydride and an organic or inorganic acid, the conversion thereof into azolylmethyloxiranes, and novel intermediates are described.Type: GrantFiled: December 7, 1992Date of Patent: December 7, 1993Assignee: BASF AktiengesellschaftInventors: Reiner Kober, Rainer Seele, Heinz Isak, Eckhard Hichmann, Norbert Goetz, Thomas Zierke
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Patent number: 5254776Abstract: Bromobiphenyls (such as 2-fluoro-4-bromobiphenyl) are synthesized by reacting together a phenylboronic acid (such as phenylboronic acid) and a bromoiodobenzene (such as 2-fluoro-4-bromoiodobenzene). The reaction generally takes place with the aid of a catalyst (such as palladium in a zero valance state) and an inert solvent (such as fluorobenzene). Control of temperature is very important to obtain both an acceptable reaction rate and an acceptable level of terphenyl byproduct.Type: GrantFiled: July 17, 1992Date of Patent: October 19, 1993Assignee: Mallinckrodt Specialty Chemicals CompanyInventors: John F. Lang, Narayanasamy Gurusamy
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Patent number: 5136114Abstract: 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 CCl.sub.4 , to .alpha.-olefins), to new geminal diarylalkanes and the aralkyl compounds resulting as intermediates.Type: GrantFiled: April 30, 1990Date of Patent: August 4, 1992Assignee: Bayer AktiengesellschaftInventor: Dieter Arlt
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Patent number: 4329525Abstract: A compound is chlorinated with chlorine to produce chlorinated product and hydrogen chloride byproduct. Recovered hydrogen chloride byproduct is contacted with oxygen and a molten salt mixture containing the higher and lower valent chlorides of a multivalent metal, such as cuprous and cupric chloride, to effect recovery of the hydrogen chloride by enriching the molten salt content of the higher valent chloride. The molten salt, enriched in higher valent chloride, is then dechlorinated by use of a stripping gas, preferably hydrogen chloride, to produce a gaseous effluent containing stripped chlorine and the stripping gas, which is then recycled to the chlorination step. The presence of stripping gas, as a diluent, improves the chlorination operation.Type: GrantFiled: February 21, 1978Date of Patent: May 11, 1982Assignee: The Lummus CompanyInventors: Herbert Riegel, Vincent Strangio, Morgan C. Sze