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| Number | Title | Issue Date |
| 8030531 | Process for production of 2,3-dichlorobutadiene-1,3 2,3-dichlorobutadiene-1,3 of high purity is produced from 1,2,3,4-tetrachlorobutane by a process comprising the steps of dehydrochlorination, chlorination of the reaction product obtained in the dehydrochlorination step and subsequent separation of a 2,3-dichlorobut... | 10/04/2011 |
| 8026400 | Process for production of 2,3-dichlorobutadiene-1,3 Purified chlorinated alkenes are produced by a process in which a mixture of i) a first chlorinated alkene that has at least one beta-chlorine substituent and no alpha-chlorine substituents and ii) a second chlorinated alkene that has at least one alpha-chlorine sub... | 09/27/2011 |
| 7741524 | Iodinated organic substances of low molecular mass and process for preparing them Process for preparing one or more iodinated organic substances having a molecular mass of less than 2000 (substances (S)) using (A) at least one free-radical-generating substance chosen from peroxides, diazo compounds, dialkyldiphenylalkanes, substances derived from... | 06/22/2010 |
| 7671243 | Method and device for using reaction heat during the production of 1,2-dichloroethane The invention relates to a method for using reaction heat produced by reaction during the production of 1,2-dichloroethane from ethylene and chlorine in a direct chlorination reactor. The chlorine is produced in a sodium chloride electrolysis and the reaction heat, ... | 03/02/2010 |
| 7348461 | Processes for halogenating compounds Methods and materials are provided for the production of essentially isomerically pure perhalogenated and partially halogenated compounds. One embodiment of the present invention provides a process for the production of essentially isomerically pure CFC-216aa. Other... | 03/25/2008 |
| 7217849 | Method for the preparation of n-propyl bromide A method is described for producing n-propyl bromide of a high degree of purity, which contains isopropyl bromide in an amount lower than 0.1% w/w, and usually lower than 0.05%. The method is characterized in that n-propanol is reacted with HBr which is in gas form,... | 05/15/2007 |
| 7182840 | Method and device for exploiting heat resulting from the production of 1,2-dichloroethane The invention relates to a method and a device for the optimal use of reaction heat resulting from the production of 1,2-dichloroethane from ethene and chlorine. The aim of the invention is achieved by extracting reaction heat liberated during the reaction of chlori... | 02/27/2007 |
| 7132578 | One-step synthesis of CF-1 A process for the preparation of trifluoromethyl iodide is provided. The process includes the step of contacting in a reactor a compound represented by the formula: CF3—W and a compound represented by the for... | 11/07/2006 |
| 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 |
| 7009084 | Method for producing 1, 2-dichloroethane by direct chlorination The invention relates to a method for producing high purity 1,2-dichloroethane using a liquid reaction medium that is circulated and that is essentially composed of 1,2-dichloroethane and a catalyst. At least ethylene and chlorine are added to the reaction medium an... | 03/07/2006 |
| 6977316 | Direct one-step synthesis of trifluoromethyl iodide A catalytic one-step process for the production of CF3I by reacting, preferably in the presence of a source of oxygen, a source of iodine with a reactant of the formula: CF3R where R is —SH, —S—S—CF3, —S... | 12/20/2005 |
| 6841708 | Method of producing ethylene (di)chloride (EDC) With a method or a device for producing 1,2-dichloroethane or ethylene (di)chloride (EDC) with the use of a circulating reaction medium and a catalyst, whereby ethylene and chlorine are supplied to the reaction medium, the goal is to permit the catalytic chlorinatio... | 01/11/2005 |
| 6835860 | Iodohydroxylation of olefins Iodohydroxylated olefins can be prepared by treating an olefin with an aqueous solution of an iodine monohalide selected from iodine monochloride and iodine monobromide. ... | 12/28/2004 |
| 6756513 | Process for preparing monochlorinated hydrocarbons having a high isomeric purity 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 hydroca... | 06/29/2004 |
| 6740253 | Preparation of non-hazardous brominating reagents The present invention relates to a non-hazardous brominating reagent from an aqueous alkaline bromine byproduct solution obtained from bromine recovery plant and containing 25 to 35% bromine dissolved in aqueous lime or sodium hydroxide containing alkali bromide and... | 05/25/2004 |
| 6693224 | Method and device for utilizing heat in the production of 1,2-dichloroethane The invention relates to a method for the production of 1,2-dichloroethane by direct chlorination using chlorine and ethene in which, despite low reaction temperatures during direct chlorination, reaction heat produced is nevertheless used. According to t... | 02/17/2004 |
| 6506952 | Production of hexabromocyclododecane of enhanced gamma isomer content Hexabromocyclododecane with enhanced gamma isomer content is produced by brominating cyclododecatriene in a liquid medium comprised of (1) at least 50 wt % of at least one liquid inert organic solvent other than 1,4-dioxane having a solubility in water of... | 01/14/2003 |
| 6420617 | Process for producing hexabromocyclododecane This invention relates to the production of an hexabromocyclododecane product, which process comprises brominating cyclododecatriene in the presence of a 1,4-dioxane and water based solvent and from about 0.5 to about 30 wt % bromide ion in the liquid pha... | 07/16/2002 |
| 6284935 | Process for producing hexabromocyclododecane This invention relates to the production of an hexabromocyclododecane product, which process comprises brominating cyclododecatriene in the presence of a 1,4-dioxane and water based solvent and from about 0.5 to about 30 wt % bromide ion in the liquid pha... | 09/04/2001 |
| 6252125 | Process and unit for the production of 1,2-dichloroethane By a process for the production of 1,2-dichloroethane (EDC) by reaction of ethylene with chlorine in the liquid phase (direct chlorination), the heavy ends being separated from the obtained 1,2-dichloroethane in a heavy-ends column and in a downstream vac... | 06/26/2001 |
| 6235953 | Process for preparing 1,2-dichloroethane by direct chlorination The preparation of 1,2-dichloroethane (EDC) is carried out by feeding ethylene and chlorine into circulating EDC (direct chlorination) such that the reaction mixture boils and the heat of the reaction is led away from the gas space.... | 05/22/2001 |
| 5986152 | Supported catalyst, process for its production as well as its use in the oxychlorination of ethylene A supported catalyst includes: a) 0.5-15 wt. % of one or more Cu-II compounds, the quantitative amounts referring to copper metal; b) 0.1-8 wt. % of one or more alkali metal compounds, the quantitative amounts referring to alkali metal; c) 0.1-10 wt. % of... | 11/16/1999 |
| 5905177 | Method for producing 1,2-dichloroethane In a method for producing 1,2-dichloroethane by an oxychlorination reaction of ethylene, hydrogen chloride and oxygen, a continuous method for producing 1,2-dichloroethane, which comprises cooling a gas discharged from an oxychlorination reactor to conden... | 05/18/1999 |
| 5866732 | Preparation of alkyl bromides from aqueous hydrobromic acid and olefins Alkyl bromides are prepared from mixtures comprising aqueous hydrobromic acid and olefins in a process in which there is concentration of the aqueous hydrobromic acid present during the reaction.... | 02/02/1999 |
| 5831137 | Process for the preparation of alkyl halides In the continuous preparation of alkyl halides from branched olefins and hydrohalic acids, the reaction is carried out without the addition of catalysts and without solvents. With a high olefin conversion, alkyl halides are obtained with high selectivity ... | 11/03/1998 |
| 5773673 | Method of making chlorinated hydrocarbons Disclosed is a method of making chlorinated hydrocarbons. A mixture is prepared of a hydrocarbon or partially chlorinated hydrocarbon from C18 to C30 and either benzotrifluoride or parachlorobenzotrifluoride in an amount sufficient t... | 06/30/1998 |
| 5527975 | Process for the preparation of bromochloro-alkanes Bromochloro-alkanes are made by reaction of a corresponding chloroalkene with hydrogen bromide by a continuous process carried at -20° to +20° C., preferably in a gas-lift reactor.... | 06/18/1996 |
| 5292450 | Production of hexabromocyclododecane Improved method by control of excess bromine in reaction between bromine and cyclododecatriene to form hexabromocyclododecane provides increased product yield. A novel reaction mass is obtained and maintained.... | 03/08/1994 |
| 5091057 | Stripping process for water removal from alcohol A process for obtaining a substantially dry alcohol from a mixture comprising alcohol and water in a non-azeotropic amount by utilizing at least a portion of the alcohol in the mixture as the stripping medium.... | 02/25/1992 |
| 5077444 | Process for drying hexabromocyclododecane A flame retardant product predominant in hexabromocyclododecane is prepared and dried by a process wherein gaseous ammonia is injected into the dryer system to prevent the formation of color bodies which contaminant the product.... | 12/31/1991 |
| 4918253 | Process for the preparation of 1,2,5,6,9,10-hexabromocyclododecane 1,2,5,6,9,10-Hexabromocyclododecane (HBCD) is prepared in an anhydrous process in polar solvents, by the bromination of 1,5,9-cis, trans, trans-cyclododecatriene at relatively high temperatures.... | 04/17/1990 |
| 4873384 | Method for producing dichloroethane A method for producing dichloroethane (EDC) by reacting ethylene and chlorine in a liquid reaction medium composed mainly of EDC at a temperature of not less than the boiling point of EDC measured at ordinary pressure, characterized by leading the vapor o... | 10/10/1989 |
| 4783563 | Preparation of hexabromocyclododecane Hexabromocyclododecane may be synthesized at a high yield in pure form by brominating 1,5,9-cyclododecatriene with bromine in a C4 -C8 saturated aliphatic alcohol in the presence of a boron trifluoride complex, neutralizing the react... | 11/08/1988 |
| 4774372 | Method for producing dichloroethane A method for producing dichloroethane (EDC) from ethylene and chlorine in high selectivity, yield and efficiency and in high safety wherein the unreacted ethylene and oxygen included in an exhaust gas discharged from a reactor are prevented from forming a... | 09/27/1988 |
| 4558167 | Hydrogen chloride-propylene separation Hydrogen chloride is recovered from a mixture with propylene by extractive distillation with an inert extraction solvent to minimize reaction between hydrogen chloride and propylene during such distillation. The temperature and pressure conditions are coo... | 12/10/1985 |
| 4388278 | Purification by hydrogenation of hydrogen chloride containing acetylene obtained by the thermal cracking of 1,2-dichloroethane The invention is a process for the purification of hydrogen chloride formed during the thermal cracking of 1,2-dichloroethane, by hydrogenating the acetylene impurities with excess hydrogen, at pressures of from 8 to 20 bar absolute and at temperatures of... | 06/14/1983 |
| 4382021 | Supported catalyst containing copper and alkali metals A supported catalyst containing copper and alkali metals, wherein the content of copper is from 1.0 to 12% by weight, based on total catalyst and expressed as metal, and the total content of the alkali metals potassium, lithium and sodium is from 0.3 to 9... | 05/03/1983 |
| 4319062 | Allyl chloride process An improved process for production of allyl chloride which comprises (1) thermally chlorinating propylene above 300° C., but below that at which substantial carbon formation is effected, (2) separating the allyl chloride from its by-products, (3) subject... | 03/09/1982 |
