| Patents for C07C 7 - Purification, separation orstabilisation of hydrocarbons; Use of additives (13,802) |
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| 05/07/1991 | US5013334 Methane purification by pressure swing adsorption |
| 04/30/1991 | US5012039 Separation of 2,7 diisopropylnaphthalene from a feed mixture comprising various diisopropylnaphthalene isomers with a zeolite adsorbent |
| 04/30/1991 | US5012038 Zeolitic para-xylene separation with diethyltoluene heavy desorbent |
| 04/30/1991 | US5012037 Integrated thermal swing-pressure swing adsorption process for hydrogen and hydrocarbon recovery |
| 04/30/1991 | US5012034 Reacting feedstock with anthracene to form styrene-adduct, then separation, heating to regenerate styrene |
| 04/30/1991 | CA1283599C Process and facility for the recovery of the heavier hydrocarbons of a gas mixture |
| 04/24/1991 | EP0424041A2 Membranes obtained from copolymers of polyimides and aliphatic polyesters. |
| 04/24/1991 | EP0424040A2 Membranes obtained from crosslinked copolymers of aliphatic polyesters diols and dianhydrides. |
| 04/24/1991 | EP0424039A1 Separation of mixtures of aromatics and saturates |
| 04/24/1991 | EP0423949A2 Membrane process for separation of organic liquids |
| 04/24/1991 | CN1050878A Silicane derivates, preparation containing derivates and use as pesticide thereof |
| 04/24/1991 | CN1050829A Parametric pump fractional crystallization method and pfc crystallizer |
| 04/17/1991 | EP0422727A1 Method for recovering trimethylbenzenes from mixtures which contain them |
| 04/17/1991 | EP0422304A1 Thermally crosslinked nitrile rubber membranes, their preparation and use for aromatics separation |
| 04/17/1991 | CA2026895A1 Polyester membranes for aromatics/saturates separation |
| 04/17/1991 | CA2026894A1 Crosslinked copolymers of aliphatic polyester diols and dianhydrides |
| 04/17/1991 | CA2020532A1 Membrane process for separation of organic liquids |
| 04/16/1991 | US5008466 Process for the isomerization of alkenes having a terminal double bond to give alkenes having an internal double bond |
| 04/02/1991 | US5004861 Process for pervaporization using membrane separating means |
| 04/02/1991 | US5004860 Filter system |
| 04/02/1991 | US5004853 Distillation, selective adsorption |
| 04/02/1991 | US5004851 Process to produce aromatics of low acid-wash color |
| 04/02/1991 | CA1282433C Stabilized vinyl aromatic composition |
| 03/13/1991 | WO1991004292A1 Absorbent material and uses thereof |
| 03/13/1991 | EP0416752A2 Polyurethane membranes and their use for the separation of aromatics from non-aromatics |
| 03/12/1991 | US4999450 Process for preparing alpha-(3-benzylphenyl) propionic acid derivative |
| 03/12/1991 | CA1281339C Method for controlling fouling of hydrocarbon compositions containing olefinic compounds |
| 03/05/1991 | US4997906 Crosslinked copolymers of aliphatic polyester diols and dianhydrides |
| 02/26/1991 | US4996388 Separation of ethyltoluene isomers |
| 02/20/1991 | CN1049329A Adsorptive separation of paraxylene using diethyltoluene desorbent |
| 02/20/1991 | CN1049328A Fertiliser with pesticides |
| 02/19/1991 | US4994249 Containing strontium; hydrocracking, reforming, saparation |
| 02/19/1991 | US4994152 Cyclohexanone, methylcyclohexanone and high boiling by-product |
| 02/19/1991 | US4994094 Method of removing organic compounds from air/permanent gas mixtures |
| 02/19/1991 | CA1280447C Tertiary olefin process |
| 02/13/1991 | EP0412215A1 Adsorptive separation of para-xylene. |
| 02/12/1991 | US4992622 Zeolitic absorption of 1,7 and 2,7 isomers followed by distillation |
| 02/12/1991 | US4992621 Separation of coumarone from indene |
| 02/12/1991 | US4992619 Pretreatment with acid catalyst |
| 02/12/1991 | US4992618 Adsorptive separation process for the purification of heavy normal paraffins with non-normal hydrocarbon pre-pulse stream |
| 02/12/1991 | US4992601 Process for the selective separation of alkenes and alkynes |
| 02/07/1991 | WO1991001177A1 Membrane for extracting unsaturated hydrocarbons and process for obtaining it |
| 02/05/1991 | US4990621 Insecticides, miticides and nematocides; 3-(3-fluoro-4-phenoxyphenyl, 3-(5-fluoro-3-phenoxypyrid-2-yl) or 3-(3-methyl-4-phenyl prop-1-ene |
| 02/05/1991 | US4990275 Separation membrane |
| 01/30/1991 | EP0410728A1 Improved carboxylic acid purification and crystallization process |
| 01/30/1991 | EP0410177A1 Alkylation of organic aromatic compounds in a dual bed system |
| 01/30/1991 | CN1011438B Method for partial condensation of hydrocarbon gas mixture |
| 01/26/1991 | CA2017620A1 Alkylation of organic aromatic compounds in a dual bed system |
| 01/25/1991 | WO1991001286A1 Selective sorption of dialkylated multinuclear aromatic compounds |
| 01/25/1991 | CA2064016A1 Selective sorption of dialkylated multinuclear aromatic compounds |
| 01/24/1991 | DE3924102A1 Membran zum austrag ungesaettigter kohlenwasserstoffe sowie verfahren zu ihrer herstellung Membrane to the material outlet of unsaturated hydrocarbons and process for their production |
| 01/23/1991 | EP0409410A1 Indenoindole compounds |
| 01/23/1991 | EP0409135A1 Improved chabazite for gas separation |
| 01/23/1991 | EP0381720A4 Low pressure noncryogenic processing for ethylene recovery |
| 01/23/1991 | CN1011307B Separating process for paraffinic olefine c4-hydrocarbon |
| 01/22/1991 | CA1279272C Process for the separation of c9 aromatic isomers |
| 01/16/1991 | EP0393029A4 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents |
| 01/08/1991 | US4983338 Upgrading naphtha streams, trimerization of polyurethane prepolymer |
| 01/08/1991 | CA1278744C Hydrocarbon recovery from carbon dioxide-rich gases |
| 01/01/1991 | US4982052 Separation of a mixture of normal paraffins branched chain paraffins and cyclic paraffins |
| 01/01/1991 | US4982048 High octane gasoline |
| 01/01/1991 | US4982034 Production and purification of t-butylstyrene |
| 01/01/1991 | US4981578 BF3 removal from BF3 catalyzed olefin oligomer |
| 12/27/1990 | EP0404643A1 Method for removing mercaptans |
| 12/27/1990 | EP0404421A1 Method of separating and purifying beta-monoisopropyl-naphthalene |
| 12/27/1990 | EP0404416A1 Transition metal exchanged ionomer membrane for hydrocarbon separation |
| 12/27/1990 | EP0403672A1 Method of inhibiting polymerization of styrenes |
| 12/27/1990 | CA1278263C Separation of 1,3-butadiene |
| 12/23/1990 | WO1990015799A1 Indenoindole compounds ii |
| 12/23/1990 | CA2060897A1 Indenoindole compounds ii |
| 12/22/1990 | CA2019488A1 Method for removing mercaptans |
| 12/21/1990 | CA2018418A1 Transition metal-exchanged ionomer membrane for hydrocarbon separation |
| 12/12/1990 | CN1010751B Semi-permeable membranes comprising predominantly polycarbonates derived from tetrahalobisphenols |
| 12/11/1990 | US4976868 Polyester membranes for aromatics/saturates separation |
| 12/11/1990 | US4976849 Efficient separation of ethane, propane, heavier hydrocarbons |
| 12/05/1990 | CN1047489A Use of fluoro-aromatic desorbent in process for adsorptive separation of para-alkylaromatic hydrocarbons |
| 12/01/1990 | WO1990015039A1 Treatment of arsine removal catalysts |
| 11/28/1990 | EP0399193A2 Extractive distillation of hydrocarbons employing solvent mixture |
| 11/28/1990 | EP0399116A1 Adsorptive separation process for purifying 2,6 diméthylnaphthalene |
| 11/28/1990 | EP0399085A1 Method and apparatus for washing impurities out of crude gases |
| 11/28/1990 | CN1010583B Process for extracting paraffins from their mixtures with paraffinsulphonic acids |
| 11/27/1990 | US4973790 Process for upgrading light olefinic streams |
| 11/27/1990 | US4973787 Use of dinitrocresol as polymerization inhibitor |
| 11/22/1990 | EP0398093A2 Composite membranes, process for their production and their use |
| 11/22/1990 | EP0397944A1 Process for adsorptive separation of para-dialkylaromatic hydrocarbons from feeds also containing at least one isomer thereof |
| 11/21/1990 | CN1010477B Process for extracting paraffins from mixture of alkane and alkanesutphonic acid |
| 11/20/1990 | CA1276541C Nitrogen rejection fractionation system for variable nitrogen content natural gas |
| 11/18/1990 | CA2016960A1 Composite membranes, processes for their preparation and their use |
| 11/13/1990 | CA1276187C Process for obtaining c2+ or c3+ hydrocarbons from gaseous mixtures |
| 11/07/1990 | EP0395857A1 Process for oligomerising olefins |
| 11/06/1990 | US4968430 Composite membranes, processes for their preparation and their use |
| 10/31/1990 | EP0394578A1 Separation of indene from feedstreams containing indene in admixture with other substances |
| 10/30/1990 | USRE33408 Process for LPG recovery |
| 10/30/1990 | US4967027 Method of inhibiting polymerization of styrenes |
| 10/30/1990 | US4966656 Separation of styrene from ethyl benzene or o-xylene by azeotropic or extractive distillation with esters |
| 10/24/1990 | EP0393029A1 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents. |
| 10/23/1990 | US4964887 Process for separating methane using permeable membrane |
| 10/18/1990 | WO1990012072A1 Styrene polymerization inhibitor |
| 10/18/1990 | WO1990005710A3 Minimizing deactivation of ether synthesis catalyst |
| 10/17/1990 | CN1010008B Process for extraction of paraffin from mixtures thereof with alkane-sulphonic acids |