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| Number | Title | Issue Date |
| 7968756 | Process and apparatus for production of vinyl chloride monomer Process and apparatus to form vinyl chloride monomer from ethylene dichloride in a cracking furnace, including a firebox chamber having a thermal protective layer disposed on refractory walls and/or process tubes disposed within the chamber, a quencher to form vinyl... | 06/28/2011 |
| 7884254 | Dehydrochlorination of hydrochlorofluorocarbons using pre-treated activated carbon catalysts The present disclosure provides methods for pre-treating activated carbon before it is used in a dehydrochlorination process. The methods can comprise mixing the activated carbon with an acid, an oxidizing agent in a liquid phase, or an oxidizing agent in a gas phas... | 02/08/2011 |
| 7767869 | Apparatus and process for the production of vinyl chloride by thermal cracking of 1,2-dichloroethane The invention relates to a process for the production of vinyl chloride by thermal cracking, in which the energy balance, the operating time of the cracking furnace and/or the yield of the reaction are distinctly enhanced in comparison with the prior art. A pressure... | 08/03/2010 |
| 7335806 | Integrated process for producing 1,2-dichloroethylene Describes an integrated process for preparing 1,2-dichloroethylenes. In the described process organic feed material, e.g., C2-C4 aliphatic hydrocarbons and/or chlorinated derivatives of such aliphatic hydrocarbons, is introduced into a first re... | 02/26/2008 |
| 7135601 | Catalytic method for the production of fluoroalkylenes from chlorofluorohydrocarbons A process for producing a producing a product of the formula: R—CF═CHR1 wherein R is F or CF3 and R1 is F when R is F and is H when R is CF3 by reacting a reactant of the formula: CF... | 11/14/2006 |
| 7033811 | Polypeptides having xyloglucanase activity and nucleic acids encoding same The present invention relates to isolated polypeptides having Family 74 xyloglucanase activity and isolated nucleic acid sequences encoding the polypeptides. The invention also relates to nucleic acid constructs, vectors, and host cells comprising the nucleic acid s... | 04/25/2006 |
| 6909024 | Process for the conversion of ethylene to vinyl chloride and novel catalyst compositions useful for such process This invention is a process for producing vinyl chloride from an ethylene-containing feed, oxygen, and a chlorine source in the presence of a catalyst. The process permits direct production of vinyl chloride in a single reactor system, and further permits ethane to ... | 06/21/2005 |
| 6797845 | Process for vinyl chloride manufacture from ethane and ethylene with immediate HCl recovery from reactor effluent A process for producing vinyl chloride monomer where significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is essentially fully recovered from the reactor effluent in the first u... | 09/28/2004 |
| 6441257 | Process for the treatment of a cracking gas from the cracking of 1,2-dichloroethane In a process for the treatment of a cracking gas formed by pyrolysis of 1,2-dichloroethane (EDC), in which the cracking gas is split into its principal components hydrogen chloride (HCl), vinyl chloride (VCM) and unreacted 1,2-dichloroethane (EDC), and th... | 08/27/2002 |
| 6426440 | Method for preparing decomposition products from the thermal decomposition of 1,2-dichlorethane 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 co... | 07/30/2002 |
| 6388151 | Synthesis of Tetraalkylcyclopentadienes A method for synthesizing tetramethylcyclopentadiene from 2,3-dibromobutane is described. A 2-bromo-2-butene Grignard is reacted with an ethyl formate to produce a 3,5-dimethyl-2,5-heptadiene-4-ol magnesium bromide which is then quenched with acetic acid ... | 05/14/2002 |
| 6368494 | Method for reducing coke in EDC-VCM furnaces with a phosphite inhibitor A method of reducing the formation of coke deposits on the heat-transfer surfaces of an ethylene dichloride to vinyl chloride pyrolysis furnace comprising exposing the heat transfer surfaces of said pyrolysis furnace to a phosphite selected from the group... | 04/09/2002 |
| 6166277 | Process for evaporating 1,2-dichloroethane (EDC) A process for evaporating 1, 2-dichloroethane (EDC) prior to its thermal decomposition (pyrolysis) is provided so that it facilitates the heating of the liquid-phase EDC at temperatures below 100° C. to meet the inlet conditions for the pyrolysis zone, w... | 12/26/2000 |
| 6111152 | Method for separating vinyl chloride from a thermally decomposed product of 1,2-dichloroethane A method for separating vinyl chloride, which comprises cooling a cracked gas obtained by cracking 1,2-dichloroethane by a thermal cracking furnace, firstly in a heat exchanger, then further cooling it in a quenching tower and then distilling it, wherein ... | 08/29/2000 |
| 6080568 | Mutant -amylase comprising modification at residues corresponding to A210, H405 and/or T412 in Bacillus licheniformis Novel -amylase enzymes are disclosed in which one or more of residues corresponding to A210, H405 and T412 in Bacillus licheniformis are mutated. The disclosed -amylase enzymes show altered or improved stability and/or activity profiles.... | 06/27/2000 |
| 5811605 | Preparation of 1,2,3,3-tetrachloropropene The dehydrochlorination of 1,1,2,3,3-pentachloropropane to produce 1,2,3,3-tetrachloropropene is conducted using aqueous alkali metal hydroxide in the substantial absence of added ethanol. The 1,2,3,3-tetrachloropropene is recovered from the reaction mixture i... | 09/22/1998 |
| 5728906 | Method and means for recovering heat in the pyrolysis of 1,2-dichloroethane A process for the pyrolysis of 1,2-dichloroethane (EDC) in a pyrolysis furnace (1) involves feeding liquid EDC into a convection heat transfer tube (2) for preheating, channeling an intermediate flow of preheated EDC into a radiation heat transfer tube (3... | 03/17/1998 |
| 5705720 | Continuous process for cracking 1,2-dichloroethane A thermal process for cracking 1,2-dichloroethane to form vinyl chloride comprising heating 1,2-dichloroethane in a reaction zone at a temperature between 300° and 650° C. under an absolute pressure between 1 and 40 bars; said heating being conducted in... | 01/06/1998 |
| 5545780 | Process for the preparation of vinyl chloride The conversion rate in the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane is determined by measuring the absorption of high-energy radiation, the pressure and the temperature of the gases issuing from the cracking furnace.... | 08/13/1996 |
| 5545388 | Methods for the synthesis of chemical compounds Methods for synthesis of chemical compounds by catalytic transfer hydrogenation comprise forming a mixture of a starting material, a hydrogen donor material and a catalyst. The catalyst is selected from a catalytic form of carbon, a polyethylene glycol ph... | 08/13/1996 |
| 5507921 | Method for quenching a gas stream in the production of vinyl chloride monomer A method and apparatus for quenching a gas stream in the production of vinyl chloride monomer includes the use of a knock back condenser and a plurality of column fractional distillation trays disposed within the quench column, and a liquid stream of 1,2-... | 04/16/1996 |
| 5488190 | Prepartion of vinyl chloride by ultrapyrolysis of 1,2-dichloroethane Vinyl chloride monomer is selectively prepared by intimately contacting, in the absence of steam, a feedstream of 1,2-dichloroethane with a flow of fluid or solid particulates heated to such elevated temperature and for such minim period of time, e.g., 0.... | 01/30/1996 |
| 5478548 | Methods for the synthesis of chemical compounds Methods for synthesis of chemical compounds by catalytic transfer hydrogenation comprise forming a mixture of a starting material, a hydrogen donor material and a catalyst. The catalyst is selected from a catalytic form of carbon, a polyethylene glycol ph... | 12/26/1995 |
| 5237114 | Removal of catalyst from chloroprene by treatment with oxy acid Quaternary ammonium phase transfer catalyst is removed from the dehydrochlorination product of 3,4-dichlorobutene-1 by treatment of the organic, chloroprene-containing phase with an oxy acid which combines with the catalyst to form a separate phase.... | 08/17/1993 |
| 5227560 | Chlorination and elimination process and some products thereof Active methine compounds are chlorinated by contacting such compounds with a perchloroalkane and aqueous base in the presence of a phase transfer catalyst which is an tetraalkylonium hydroxide. Chlorinated products, preferably tertiary alkyl chloro compou... | 07/13/1993 |
| 5210345 | Process for the preparation of vinyl chloride An addition of benzotrichloride produces a significantly higher yield of vinyl chloride in the thermal cleavage of 1,2-dichloroethane.... | 05/11/1993 |
| 5196617 | Method of hydrodehalogenating halogenated organic compounds in aqueous environmental sources A process for hydrodehalogenating halogenated organic compounds present in a contaminated aqueous environmental source in which the halogenated organic compounds are reacted with hydrogen gas or a source of hydrogen gas in the presence of a catalyst of pa... | 03/23/1993 |
| 4960963 | Process for producing vinylchloride monomer by pyrolysis of 1,2-dichloroethane Process for producing vinylchloride monomer by pyrolysis of 1,2-dichloroethane comprising carrying out heat exchange between a high temperature cracked gas produced as a result of the pyrolysis product and the 1,2-dichloroethane which is introduced into t... | 10/02/1990 |
| 4843182 | Process for the production of monomer vinyl chloride by cracking of dichloroethane and system suitable to carry out the process The invention relates to a process for the production of vinyl chloride by starting from dichloroethane, wherein dichloroethane is heated, without being vaporized, in the convective section of an oven, it is then vaporized by indirect heat exchange with a... | 06/27/1989 |
| 4822932 | Heat recovery in production of vinyl chloride by pyrolysis of dichloroethane In a method of treating the reaction product of pyrolysis of 1,2-dichloroethane to form vinyl chloride and hydrogen chloride with multiple stage cooling and distillation separation of the reaction product and recycle of unreacted 1,2-dichloroethane to the... | 04/18/1989 |
| 4816609 | Process and catalyst for the dehydrohalogenation of halogenated hydrocarbons An unsaturated halohydrocarbon such as vinylidene chloride is produced by the dehydrohalogenation of haloalkanes such as 1,1,1-trichloroethane or 1,1,2-trichloroethane, in the presence of a novel mixed salt catalyst containing a Group IA metal cation such... | 03/28/1989 |
| 4798914 | Process for the production of vinyl chloride through thermal cracking of 1,2-dichloroethane The hot, vinyl chloride-containing gases leaving the cracking furnace heat liquid 1,2-dichloroethane in a first container to the boiling point or to its immediate vicinity, and the 1,2-dichloroethane is transferred into a second container in which it is p... | 01/17/1989 |
| 4788357 | Vinyl chloride production An improved method of producing vinyl chloride by pyrolysis of purified 1,2-dichloroethane at temperatures from 480° C. to 540° C. at a pressure of 10 to 36 bar absolute with partial utilization of the heat content of the flue gases from the pyrolysis f... | 11/29/1988 |
| 4760206 | Process for removing butadiene from vinyl chloride in a quench tower Ferric chloride (FeCl3), a known chlorination and polymerization catalyst for 1,3-butadiene ("BD"), can nevertheless be effectively used in a packed or trayed quench tower, operating under essentially anhydrous conditions, without plugging it. ... | 07/26/1988 |
| 4746759 | Process for thermal cracking of 1,2-dichloroethane to form vinyl chloride An improved process for the preparation of vinyl chloride from 1,2-dichloroethane (EDC) wherein 0.10 to 0.15 % by weight of carbon tetrachloride based on EDC, is used as a cracking promoter and the CHCl3 content is limited to less than 200 ppm.... | 05/24/1988 |
| 4721604 | Thermal cracking furnace for producing vinyl chloride The invention relates to an apparatus for the production of vinyl chloride by starting from dichloroethane, wherein dichloroethane is heated, without being vaporized, in the convective section of an oven, it is then vaporized by indirect heat exchange wit... | 01/26/1988 |
| 4720599 | Preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane A process for the preparation of vinyl chloride by vaporizing liquid 1,2-dichloroethane, thermally cracking the 1,2-dichloroethane and cooling the hot reaction mixture by means of cooled and condensed portions of the reaction mixture, wherein a defined am... | 01/19/1988 |
| 4665243 | Process for preparing vinyl chloride monomer The energy requirements for preparing vinyl chloride monomer can be reduced by a process which includes the steps of purifying by distillation ethylene dichloride, compressing the ethylene dichloride vapor from the distillation column to a temperature and... | 05/12/1987 |
| 4642400 | Process for finishing vinyl chloride monomer This process stems from the discovery that the solubility of water in vinyl chloride monomer ("VCM") is so low in a cold aqueous caustic solution at a temperature below 0° C., that the aqueous solution will remove water dissolved in the monomer, and at t... | 02/10/1987 |
| 4604480 | Method for the preparation of sulfones and compounds containing carbon chains having conjugated unsaturation and the compounds resulting from such method A method for the preparation of a first sulfone compound of the formula: ##STR1## wherein Ra is ##STR2## where Rb is Br and Rc is H except that Rb and Rc together may be an electron pair whe... | 08/05/1986 |
