Class 570/236 - Isomerization

Subclass of Class 570 - Organic compounds -- part of the class 532-570 series
Definition: Process wherein a compound is converted into another compound
No. of patents: 33
Last issue date: 11/29/2011

Number	Title	Issue Date
8067650	Process for the production of HFO trans-1234ze from HFC-245fa This invention relates a process for the manufacture of the HFO trans-1,3,3,3-tetrafluoropropene (HFO trans-1234ze). More particularly, the invention pertains to a process for the manufacture of the HFO trans-1234ze by first dehydrofluorinating 1,1,1,3,3-pentafluoro...	11/29/2011
8058491	Catalytic isomerization between E and Z isomers of 1,2,3,3,3-pentafluoropropene using aluminum catalyst A starting material comprising 1,2,3,3,3-pentafluoropropene is contacted with an aluminum chlorofluoride (AlClxF3-x) catalyst to obtain a final product wherein the Z/E ratio of 1,2,3,3,3-pentafluoropropene is either increased or decreased relat...	11/15/2011
8044252	Catalytic isomerization between E and Z isomers of 1,2,3,3,3-pentafluoropropene A process is disclosed to increase the Z/E ratio of 1,2,3,3,3-pentafluoropropene. The process involves contacting a starting material comprising 1,2,3,3,3-pentafluoropropene with a catalyst on AlF3 or carbon, wherein the catalyst is selected from the grou...	10/25/2011
7872163	Process for production of 3,4-dichlorobutene-1 3,4-Dichlorobutene-1 is produced by a process comprising the step of contacting 1,4-dichlorobutene-2 with either 1) a ferric carboxylate catalyst of the formula where R is an alkyl or alkenyl group of 4-18 carbon atoms, a c...	01/18/2011
7709691	Process for geometric isomerization of halogenated olefins Disclosed are processes for the conversion of isomerizable halogenated C2-C6 olefins from one geometric form to a more preferred geometric form. Preferred process aspects comprise converting C2-C6 olefin in a cis-form to a trans-form comprising exposing the cis-form...	05/04/2010
7638660	Integrated HFC trans-1234ze manufacture process An integrated process for the manufacture of HFO trans-1,3,3,3-tetrafluoropropene (HFO trans-1234ze) by first catalytically dehydrofluorinating 1,1,1,3,3-pentafluoropropane to thereby produce a mixture of cis-1,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoroprop...	12/29/2009
7563936	Processes for geometric isomerization of halogenated olefins Disclosed are processes for the conversion of isomerizable halogenated C2-C6 olefins from one geometric form to a more preferred geometric form. Preferred process aspects involve converting C2-C6 olefin in a cis-form to a trans-form under conditions effective to con...	07/21/2009
7485760	Integrated HFC trans-1234ze manufacture process An integrated process for the manufacture of HFO trans-1,3,3,3-tetrafluoropropene (HFO trans-1234ze) by first catalytically dehydrofluorinating 1,1,1,3,3-pentafluoropropane to thereby produce a mixture of cis-1,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoroprop...	02/03/2009
7268262	Method for recovering trans-1,2-dichloroethene Describes a method for recovering trans-1,2-dichloroethene from a liquid feed composition comprising both the cis-and trans-isomers of 1,2-dichloroethene and contaminating amounts of other chlorinated hydrocarbons, e.g., lower alkyl chlorinated hydrocarbons, such as...	09/11/2007
6933417	Process for vinyl chloride manufacture from ethane and ethylene with partial CHl recovery from reactor effluent A process for producing vinyl chloride monomer from ethylene and ethane having input of significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is only partially recovered from the...	08/23/2005
6916761	Polymer-supported Lewis acid catalyst In order to provide a novel Lewis acid catalyst, which shows high reaction activity in aqueous medium, is easily recovered, and is excellent in reusability, a Lewis acid group expressed by the general formula (I): MXn (I) (wherein...	07/12/2005
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
6881872	Less colored trans-1,3-dichloropropene and process for its production Less colored trans-1,3-dichloropropene and a process for producing it, are presented. A composition comprising cis-1,3-dichloropropene, trans-1,3-dichloropropene and C6 compounds, is subjected to a distillation step and to a step of reacting chlori...	04/19/2005
6774270	Method of removing hexafluoropropylene dimers A method of removing hexafluoropropylene dimers (“HFP dimers”), dimer hydrides and other oligomers from a fluid is described. The method comprises heating the fluid to isomerize the HFP dimers to the thermodynamic isomer, and contacting the fluid with a tertiary...	08/10/2004
6392107	Process for isomerizing dichlorobutenes This invention relates to a process for isomerizing 1,4-dichloro-2-butene to yield 3,4-dichloro-1-butene or 3,4-dichloro-1-butene to yield 1,4-dichloro-2-butene, characterized in that the catalyst used comprises a compound of the formula CpFe(CO)2	05/21/2002
6034290	Porous microcomposite of metal cation exchanged perfluorinated ion-exchange polymer and network of metal oxide, silica, or metal oxide and silica Porous microcomposites comprising a perfluorinated ion-exchange polymer (PFIEP) containing pendant metal cation exchanged sulfonate groups, metal cation exchanged carboxylate groups, or metal cation exchanged sulfonate and carboxylate groups, wherein the ...	03/07/2000
5763711	Catalyst for the rearrangement of allylic geminal dihalogen compounds A process for converting 3,3-dichloropropene in an intermediate boiling byproduct stream from a process of making allyl chloride by the chlorination of propylene to cis- or trans-1,3-dichloropropene or a mixture of these, wherein the 3,3-dichloropropene i...	06/09/1998
5510546	Process for rearranging allylic geminal dihalogen compounds An improved process for converting 3,3-dichloropropene in an intermediate boiling byproduct stream from a process of making allyl chloride by the chlorination of propylene to cis- or trans-1,3-dichloropropene or a mixture of these, wherein the intermediat...	04/23/1996
5072063	Process for rearranging allylic geminal dihalogen compounds Cis- and trans-1,3-dichloropropenes and their homologs and 1,3-dibromopropenes can be prepared by isomerizing the corresponding 3,3-dihalopropene or homolog thereof in a simple, high yield process by contacting the latter with an effective silica, alumina...	12/10/1991
5051536	Method for isomerizing 1,2-dichloroethene One stereoisomer of 1,2-dichloroethene is isomerized to the other stereoisomer in the liquid phase and in the presence of free radical initiator....	09/24/1991
4895993	Promoters for haloalkene isomerization An isomerization of a haloalkene is conducted in the presence of a mixture of a copper compound and a trithiocarbonic acid derivative or dithiocarbonic acid derivative....	01/23/1990
4827059	Dichlorobutene isomerization process Formation of solid and/or high boiling residues during the isomerization of one of 1,4-dichlorobutene-2 and 3,4-dichlorobutene-1 into each other in the presence of a cuprous chloride catalyst is inhibited by the addition to the isomerization reaction of a...	05/02/1989
4781807	Efficient cis-to-trans isomerization of 1,4-dihalobutene-2 This invention relates to an efficient cis-to-trans isomerization of 1,4-dihalobutene-2 by means of a thiol or hydrogen bromide or hydrogen chloride catalyzed reaction....	11/01/1988
4761507	Isomerization of linalyl halides with quaternary salts A method for the isomerization of linalyl halides is disclosed, improved by the presence of an organic quaternary salt. The improved method of the invention requires less energy for completion of the isomerization and shortens the isomerization times....	08/02/1988
4704486	Hydrohalogenation of myrcene in the presence of alcohols The disclosure is of an improved process for the hydrohalogenation of myrcene in the presence of a catalyst, which comprises carrying out the hydrohalogenation in the presence of an alcohol....	11/03/1987
4704489	Isomerization of linalyl halides with alcohols A method for the isomerization of linalyl halides is disclosed, improved by the presence of an alcohol. The improved method of the invention requires less energy for completion of the isomerization and shortens the isomerization times....	11/03/1987
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
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
4461920	Isomerization of dichlorobutenes 3,4-Dichlorobutene-1 and 1,4-dichlorobutene-2 are isomerized in the presence of a catalyst of a combination of a copper compound or copper metal and at least one additive from the group of 1,3-diphenylguanidine, di-o-tolylguanidine, glycine ethyl ester hy...	07/24/1984
4328381	Isomerization of dichlorobutenes An isomerization between 3,4-dichlorobutene-1 and 1,4-dichlorobutene-2 is carried out in the presence of a catalyst for isomerization as a combination of a copper compound and a dithiocarbamic acid derivative. The dithiocarbamic acid derivative is a compo...	05/04/1982
4237074	Isomerization of dichlorobutenes 3,4-Dichlorobutene-1 and 1,4-dichlorobutene-2 are isomerized in the presence of a catalyst of a combination of a copper compound or copper metal and at least one additive from the group of 1,3-diphenylguanidine, di-o-tolylguanidine, glycine ethyl ester hy...	12/02/1980
4168283	Process for drying copper containing catalyst waste Viscous copper-containing catalyst waste is split up into solid particles and gaseous dichlorobutene along a steadily curved flow path, the liquid film flowing along an inner tube wall being driven along by the gas flowing at a higher rate in the core....	09/18/1979
4070405	Process for working up liquid copper-containing catalyst waste from isomerization reactions of dichlorobutene Improved working up of the waste from an isomerization reaction of dichlorobutene by precipitating the copper catalyst used in said process by adding a polar solvent and removing the resulting precipitate by filtration....	01/24/1978

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Class 570/236 - Isomerization