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| Number | Title | Issue Date |
| 7118920 | Multiphasic microchannel reactions Multiphasic reactions, especially those reactions using a phase transfer catalyst, are conducted in microchannel apparatus. Advantageously, these reactions can be conducted with two, planar microlayers of reactants in adjacent laminar flow streams. Microchannel appa... | 10/10/2006 |
| 7074975 | Catalytic synthesis of halogenated compounds with catalyst regeneration with elemental halogen Catalysts such as antimony halides, which are useful in fluorination reactions involving hydrogen fluoride, may be reduced during the reaction and require regeneration. Regenerative oxidation is usually carried out by introducing elemental halogen, preferably fluori... | 07/11/2006 |
| 7041859 | Method for halogenating or radiohalogenating a chemical compound A method for obtaining a halogenated organic compound, whereby an organotrifluoroborate compound is reacted with a halide ion in the presence of an oxidizing agent to produce the corresponding halogenated organic compound. The method may be used for producing radioh... | 05/09/2006 |
| 6946559 | Method of converting functional group through halogen-metal exchange reaction A method by which a halogen atom of a halogen compound can be efficiently replaced with an electrophilic group. Also provided are: a reagent for converting a functional group through a halogen-metal exchange reaction, characterized by comprising either a mixt... | 09/20/2005 |
| 6844474 | Process for the production of difluoromethane The present invention provides a vapor phase process for the production of difluoromethane, HFC-32. The process of this invention provides for the preparation of HFC-32 by a process that exhibits both good product yield and selectivity. ... | 01/18/2005 |
| 6627777 | Catalysts for hydrodechlorination of carbon tetrachloride to chloroform Catalysts for the fluid-bed hydrodechlorination of carbon tetrachloride to chloroform having high catalytic stability and comprising platinum supported on microspheroidal gamma alumina, characterized in that the platinum is in the form of particles disper... | 09/30/2003 |
| 6489525 | Methods for preparing primary alkyl bromides Methods of converting methyl chloride to methyl bromide include the steps of providing a composition comprising a bromide salt and water; contacting the composition with a primary alkyl chloride; and recovering methyl bromide.... | 12/03/2002 |
| 6489524 | Selective bromination of aromatic compounds Aromatic substrates are Ar-brominated in high yield and selectivity by reacting the substrate with a brominating agent in the presence of at least about 0.19 gram per mmol of substrate of a zeolite catalyst which has an absorbed water content of no greate... | 12/03/2002 |
| 6365580 | Process for the production of difluoromethane The present invention provides a vapor phase process for the production of difluoromethane, HFC-32. The process of this invention provides for the preparation of HFC-32 by a process that exhibits both good product yield and selectivity.... | 04/02/2002 |
| 6204418 | Process for the chlornation of hydrocarbons A process is provided for the chlorination of aliphatic hydrocarbons containing 1 to 4 carbon atoms using hydrogen chloride as the source of chlorine. The process comprises reaction steps operated in tandem in separate zones. First, an unsaturated aliphat... | 03/20/2001 |
| 5948942 | Bimetallic catalyst for the simultaneous selective hydrogenation of diolefins and nitriles and method of making same A catalyst useful for the simultaneous and selective hydrogenation of diolefins and nitriles present in a hydrocarbon feedstock includes (a) a support material selected from the group consisting of inorganic oxide, carbon, zeolite and mixtures thereof; an... | 09/07/1999 |
| 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 |
| 5877364 | Process for the simultaneous selective hydrogenation of diolefins and nitriles in multiple reactor units A process is provided for simultaneous selective hydrogenation of diolefins and nitriles from a hydrocarbon feedstock, wherein hydrogenation is carried out using a catalyst in one reactor zone while partially deactivated catalyst in another reactor zone i... | 03/02/1999 |
| 5663446 | Catalyst for the simultaneous selective hydrogenation of diolefins and nitriles and method of making same A catalyst useful for the simultaneous and selective hydrogenation of diolefins and nitriles present in a hydrocarbon feedstock. The support material is preferably selected from the group consisting of an inorganic oxide-zeolite composite, carbon and zeol... | 09/02/1997 |
| 5347060 | Phase-transfer catalysis with onium-containing synthetic mesoporous crystalline material This invention relates to phase transfer catalysis (PTC) using a composition of synthetic ultra-large pore crystalline material which contains a cation of an onium compound, e.g. cetyltrimethylammonium, within the pores of said material. The crystalline m... | 09/13/1994 |
| 5146020 | Disproportionation of selected chlorofluoromethanes Trifluoromethane or monochlorodifluoromethane and carbon tetrachloride are converted to trichloromonofluoromethane, dichlorodifluoromethane and chloroform using a catalyst of activated aluminum and magnesium oxides.... | 09/08/1992 |
| 4849545 | Process for the production of aliphatic ketones An aliphatic ketone is produced by reacting a carbonyl complex of a metal of Group VIII of the Periodic Table of the Elements, for example a rhodium carbonyl complex, with an aliphatic hydrocarbyl halide, for example an alkyl iodide.... | 07/18/1989 |
| 4754089 | Phase transfer catalysis The present invention relates to a novel method for conducting phase transfer catalysis in a multiphase reaction system wherein the different phases are separated by a membrane permeable to the phase transfer catalyst and its various reaction complexes. T... | 06/28/1988 |
| 4368340 | Process for producing 1,3,5-trichlorobenzene 1,3,5,-Trichlorobenzene is produced by chlorinating 1,3,5-trihalobenzene having 1 to 3 bromine atom and 2 to 0 chlorine atom. The gaseous 1,3,5-halobenzene having 1 to 3 bromine atom and 2 to 0 chlorine atom is brought into contact with chlorine gas at a ... | 01/11/1983 |
| 4197262 | Preparation of organic halides Organic halides containing at least one halogen-replaceable bromine atom are reacted with chlorine in the presence of a catalyst selected from the group consisting of the halides of antimony, tin, zinc, or vanadium to form a corresponding organic halide h... | 04/08/1980 |
| 3994985 | Carbon black catalysis Certain organic or organic-aqueous halide exchange reactions are catalyzed by carbon black.... | 11/30/1976 |
| 3972953 | Group VIII metal complex catalyzed halogen exchange reaction Alkyl halide exchange may be catalyzed under mild conditions in homogeneous solution by ligand stabilized, low valent, coordinatively unsaturated d6 or d8 Group VIII metal complexes of the formula wherein M is a metal of Group VIII of the... | 08/03/1976 |
