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| Number | Title | Issue Date |
| 7947856 | Process for the preparation of halogenated hydrocarbons with at least 3 carbon atoms in the presence of iron and a phosphite A telomerisation process is described whereby haloalkanes like tetrachloromethane are added to halogenated olefins like 2-chloroprop-1-ene in the presence of an iron catalyst and a phosphite. The reaction products, e.g. 1,1,1,3,3-pentachlorobutane, can be fluorinate... | 05/24/2011 |
| 7265082 | Azeotrope-like compositions of 1,1,1,3,3-pentachloropropane and carbon tetrachloride The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentachloropropane (HCC-240fa) and carbon tetrachloride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the prod... | 09/04/2007 |
| 7144523 | Azeotropic compositions of cyclopentane This invention relates to compositions of cyclopentane, and a compound selected from the group consisting of hydrofluorocarbons, hydrofluoroethers, or fluorinated sulfur compounds. Specifically these compounds may be selected from the group consisting of tetrafluoro... | 12/05/2006 |
| 7112709 | Method for reusing heavy end by-products in the manufacture of polychlorinated alkanes A method for recovering much of the carbon and chlorine value in the heavy ends and other undesired by-products formed during the production of a C3 or higher polychlorinated alkane through the reaction of carbon tetrachloride with an olefine or chlorinat... | 09/26/2006 |
| 7102042 | Method for producing substituted fluorene monomers A method for preparing a composition of the formula in a yield greater than 50% where R1 is C 1-20 comprising the steps of combining fluorene or dibromo flourene, an excess of alkali metal hydroxide and a ha... | 09/05/2006 |
| 7094936 | Process for preparing halogenated alkanes Methods and materials are provided for the production and purification of halogenated compounds and intermediates in the production of 1,1,1,3,3-pentafluoropropane. In a preferred embodiment, the process steps include: (1) reacting carbon tetrachloride with vinyl ch... | 08/22/2006 |
| 6861566 | Process for producing 1-chloro-4-arylbutane 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 reactin... | 03/01/2005 |
| 6858763 | Process for preparing elastomeric ethylene-hexafluoropropylene copolymer The present invention relates to a process for preparing an elastomeric ethylene-hexafluoropropylene copolymer with excellent vulcanization properties, which comprises emulsion polymerizing ethylene, hexafluoropropylene and when in demand, a monomer copolymerizable ... | 02/22/2005 |
| 6806396 | Disposal of fluoroform (HFC-23) The present invention relates to the co-pyrolysis of fluoroform and chlorodifluoromethane to form a mixture of useful fluoroolefin and saturated HFCs, notably, tetrafluoroethylene and hexafluoropropylene and CF3CHF2 and CF3CHFCF... | 10/19/2004 |
| 6720466 | 1,1,1,3,3-pentachloropropane process purge stream concentration using a secondary refluxed evaporator and secondary product recovery A process for economically producing 1,1,1,3,3-pentachloropropane under conditions which preserve the activity of the catalyst. In a preferred embodiment, a two-stage distillation process is employed. In the two-stage process, the size of the equipment, temperature ... | 04/13/2004 |
| 6500993 | Process for preparing halogenated hydrocarbons Process for preparing halogenated hydrocarbons, comprising at least 3 carbon atoms, by catalytic telomerization between a haloalkane and an olefin in the presence of an amine with a high boiling point as co-catalyst. 1,1,1,3,3-Pentachloropropane and 1,1,1... | 12/31/2002 |
| 6500995 | Water-enhanced production of 1,1,1,3,3,-pentachloropropane A process is provided by which addition of water is used to enhance the production of any hydrochlorocarbon feedstock through the use of Kharasch chemistry, i.e. the combination of a polychlorinated alkane with an olefin to produce a chlorinated or hydroc... | 12/31/2002 |
| 6441256 | Method for preparing of halogenated hydrocarbons Halohydrocarbons comprising at least 3 carbon atoms are obtained by reaction between a haloalkane and a haloolefin, in the substantial absence of nitrile, and by introducing the reactants in a molar ratio between the haloalkane and the haloolefin of less ... | 08/27/2002 |
| 6399839 | Method for preparing halogenated hydrocarbons Halohydrocarbons comprising at least 3 carbon atoms are obtained by reaction between a haloalkane and an olefin in the presence of an organocopper compound as catalyst, a solvent and/or a cocatalyst. 1,1,1,3,3-Penta-chloropropane can thus be obtained in g... | 06/04/2002 |
| 6399840 | Method for the preparation of 1,1,1,3,3-pentachlorobutane 1,1,1,3,3-pentachlorobutane is obtained by reacting carbon tetrachloride with 2-chloro-1-propene in the presence of at least one copper (I) or (II) compound as telomerization catalyst. Advantageously, a polar compound can be present in the reaction mixtur... | 06/04/2002 |
| 6313360 | Process for the manufacture of 1, 1, 1, 3, 3-pentachloropropane A process is provided for the production of 1,1,1,3,3-pentachloropropane. The process comprises: (a) producing a product mixture in a reactor by reacting carbon tetrachloride and vinyl chloride in the presence of a catalyst mixture comprising organophosph... | 11/06/2001 |
| 6300532 | Process for addition of haloalkanes to alkenes catalyzed by an organophosphite compound A process for catalytic addition of haloalkanes to alkenes involving the step of reacting the haloalkane with the alkene in the presence of a catalyst. The catalyst is an organophosphite compound represented by the following formula: P(ORa)(OR | 10/09/2001 |
| 6291730 | Process for the manufacture of halocarbons and selected compounds and azeotropes with HF A liquid phase process is disclosed for producing halogenated alkane adducts of the formula: CAR1 R2 CBR3 R4 (where A, B, R1, R2, R3, and R4 are as defined in the spec... | 09/18/2001 |
| 6187978 | Continuous process for manufacturing halogenated compounds A process for preparing a haloalkane comprising: (a) contacting a haloalkane starting material with a haloalkene starting material in the presence of an effective amount of a catalyst complex under conditions effective to facilitate an addition reaction a... | 02/13/2001 |
| 6153803 | Process for the preparation of halohydrocarbons Halohydrocarbons comprising at least 3 carbon atoms are obtained by reaction between a haloalkane and a haloolefin in the presence of an organonickel compound as catalyst, and optionally in the presence of a solvent. 1,1,1,3,3-Pentachlorobutane can thus b... | 11/28/2000 |
| 6040487 | Process for the manufacture of halocarbons A liquid phase process is disclosed for producing halogenated alkane adducts of the formula: CAR1 R2 CBR3 R4 (where, A, B, R1, R2, R3 and R4 are defined in the specificatio... | 03/21/2000 |
| 5902914 | Process for the preparation of halogenated alkanes A process for the preparation of halogenated alkanes is provided. In particular, a process is provided for the highly selective preparation of haloalkanes, including 1,1,1,3,3-pentachloropropane, pentachlorobutane, and hepatchlorohexane, in good yield.... | 05/11/1999 |
| 5880318 | Process for the preparation of -bromo, ω-chloroalkanes Described is a process for easily preparing an -bromo,ω-chloroalkane which is high in purity represented by the formula: Br(CH2)n Cl in which n stands for an integer of 4 to 12. The process comprises reacting in an organic so... | 03/09/1999 |
| 5792893 | Method for the manufacture of 1,1,1,3,3,3-hexachloropropane A novel method for manufacturing 1,1,1,3,3,3-hexachloropropane. Tetrachloromethane is reacted with 1,1-dichloroethene in the presence of a catalyst comprising copper and a solvent selected from a C3 to a C5 alkanenitrile. The 1,1,1,3,3,3-hexachloropropane... | 08/11/1998 |
| 5633413 | Continuous process for the production of vinylidene chloride telomers A process for the continuous production of telomers CCl3 (CH2 CCl2)n Cl where n=1-3 (Formula I) by the continuous reaction of CCl4 and vinylidene chloride in the presence of a solvent and a catalyst. ... | 05/27/1997 |
| 5426252 | Catalytic hydrodechlorination of a chloromethane Chloromethane compounds including carbon tetrachloride and the chlorofluoromethane compounds, such as dichlorodifluoromethane, can be catalytically hydrodechlorinated, e.g., in the case of dichlorodifluoromethane to monochlorodifluoromethane and/or d... | 06/20/1995 |
| 5352812 | Metathesis of acyclic olefins using an iridium/silver catalyst composition The metathesis of functionalized and unfunctionalized acyclic olefins using catalyst compositions containing iridium and silver in a molar ration of 3 to 1.... | 10/04/1994 |
| 5334782 | Method for producing a hydrogen-containing chloromethane The present invention relates to a method for producing a hydrogen-containing chloromethane such as chloroform at high selectivity in good yield by reducing a polychloromethane such as carbon tetrachloride in the presence of a reduction catalyst. In the p... | 08/02/1994 |
| 5138109 | Process for preparing halogenated alkyl A halogenated alkyl of the formula: ##STR1## wherein R1, R2 and R3 are the same or different and each is a lower alkyl group, X is chlorine atom or a bromine atom and Y is a hydrogen atom or a halogen atom is prepared... | 08/11/1992 |
| 5097081 | Hydrodechlorination of higher chloromethanes The highly chlorinated methanes, e.g., carbon tetrachloride, are improvedly dechlorinated by reacting same with hydrogen in the presence of oxygen or an oxygen-containing gas, e.g., air, and a catalytically effective amount of a metal of the copper or pre... | 03/17/1992 |
| 4650914 | Process for producing 1,1,2,3-tetrachloropropene A process is disclosed for preparing 1,1,2,3-tetrachloropropene comprising allylic rearrangement of 2,3,3,3-tetrachloropropene using a substantially anhydrous ferric chloride catalyst. Alternatively, 1,1,2,3-tetrachloropropene is prepared by dehydrochlori... | 03/17/1987 |
| 4605802 | Production of 1,1,1,3-tetrachloropropane In the reaction of carbon tetrachloride with ethylene in the presence of a catalyst comprising a phosphite ester and an iron-containing material to produce 1,1,1,3-tetrachloropropane, the improvement which comprises employing powdered iron as the iron-con... | 08/12/1986 |
| 4535194 | Process for producing 1,1,2,3-tetrachloropropene A process is disclosed for preparing 1,1,2,3-tetrachloropropene comprising allylic rearrangement of 2,3,3,3-tetrachloropropene using a substantially anhydrous ferric chloride catalyst. Alternatively, 1,1,2,3-tetrachloropropene is prepared by dehydrochlori... | 08/13/1985 |
| 4518813 | Optically active units for the synthesis of the side chain of (R,R,R)--tocopherol and their preparation (2R,6R)-1-Chloro-2,6,10-trimethyl-undecane I, (R)-(+)-ଲ-chloro-isobutyric acid II, (S)-(+)-1-bromo-3-chloro-2-methylpropane IV and (2R)-(+)-1-chloro-2,6-dimethyl-heptane V are novel optically active units for the synthesis of the side chain of ... | 05/21/1985 |
| 4475003 | Preparation of 1,1,1-trichloromethyl compounds 1,1,1-Trichloromethyl compounds are prepared by a process in which chloroform is reacted with an olefin in the presence of a free-radical initiator and of a weakly basic alkali metal salt or alkaline earth metal salt, and are useful intermediates for the ... | 10/02/1984 |
| 4471096 | Process for the production of vinyl chloride polymers in the presence of a chain-transfer agent that is a mercapto organic compound having at least one beta-ether linkage Vinyl chloride polymers are prepared by polymerizing a monomer component that comprises vinyl chloride in an aqueous medium in the presence of a free radical-generating polymerization initiator and 0.01% to 2% by weight, based on the weight of the monomer... | 09/11/1984 |
| 4440947 | Preparation of substituted alpha-halogeno-propionic acids and their derivatives Substituted -halogenopropionic acids and their derivatives of the general formula ##STR1## wherein R1 to R3, Y and X have the meanings given in the description, are prepared by a process which is characterized in that ... | 04/03/1984 |
| 4395372 | Alkylation process A process is disclosed for alkylation of benzenes with lower olefins which comprises contacting the benzene and lower olefin with a rare earth exchanged X or Y zeolite catalyst in the presence of sulfur dioxide.... | 07/26/1983 |
| 4322570 | Process for the addition of a chlorinated methane containing at least three chlorine atoms to an ethylenically unsaturated hydrocarbon An addition product of a chlorinated methane containing at least 3 chlorine atoms and an ethylenically unsaturated hydrocarbon is prepared by heating at about 70° to about 250° C. in the presence of a manganese compound in which the manganese has a vale... | 03/30/1982 |
| 4322355 | Production of 1,3-difunctional compounds An improvement in the reaction of olefin with aldehyde, and optionally, carboxylic acid, in the liquid phase in the presence of a catalytically effective amount of strong acid to provide a 1,3-difunctional compound or a mixture of 1,3-difunctional compoun... | 03/30/1982 |
