| Patents for C07C 7 - Purification, separation orstabilisation of hydrocarbons; Use of additives (13,802) |
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| 10/16/1990 | CA1275264C Process for the separation of c10 aromatics isomers |
| 10/16/1990 | CA1275168C Temperature stable liquid composition |
| 10/10/1990 | EP0391620A1 Method for reducing fouling in ethylene cracking furnaces |
| 10/10/1990 | CN1009923B Process for removing paraffins from their mixture with paraffinsulphonic acid |
| 10/09/1990 | US4962275 Decompression through restrictor nozzle and stream into enclosure with oil to dissolve; separation of carotene/b-/ |
| 10/09/1990 | US4962274 Clathrating with 9,9'-bianthracene |
| 10/09/1990 | US4962272 Treatment of arsine removal catalysts |
| 10/09/1990 | CA1275119A1 Isomerization process and apparatus |
| 10/09/1990 | CA1275118A1 Process and apparatus for separating branched- from unbranched hydrocarbons |
| 10/03/1990 | CA2004252A1 Triphenylphosphine oxide as an ethylene furnace antifoulant |
| 10/02/1990 | US4960519 Membrane process for separation of organic liquids |
| 10/02/1990 | CA1274854A1 Process for the extraction of paraffins from mixtures thereof with alkane-sulphonic acids |
| 10/02/1990 | CA1274764A1 Process to separate nitrogen and methane |
| 09/26/1990 | EP0383793A4 Process to produce aromatics of low acid-wash color |
| 09/26/1990 | EP0271556B1 Method and device for deacidifying a gas containing h 2?s and/or co 2? as well as mercaptans |
| 09/25/1990 | US4959128 Separation of styrene from ethyl benzene by extractive distillation |
| 09/25/1990 | CA1274551A1 Continuous process for mercaptan extraction from a highly olefinic feed stream |
| 09/25/1990 | CA1274550A1 Liquid removal enhancement |
| 09/20/1990 | WO1990010837A1 Process for cryogenically separating natural gas streams |
| 09/20/1990 | WO1990010685A1 Process for separating hydrogen from a predominantly polyolefine-containing inflow |
| 09/13/1990 | DE3907570A1 Verfahren zur abtrennung von wasserstoff aus einem ueberwiegend olefinhaltigen einsatzstrom A process for the separation of hydrogen from an olefin-containing feed stream Mostly |
| 09/12/1990 | EP0387080A1 Alkylation of organic aromatic compounds |
| 09/11/1990 | US4956522 Zeolitic para-ethyltoluene separation with tetralin heavy desorbent |
| 09/11/1990 | US4956521 Hydrocarbon feeds for separation of isopentane and dimethyl branched hexanes by adsorption on molecular sieves to improve octane ratings |
| 09/11/1990 | US4956520 P-xylene separation and purification, crystallization, cooling, washing then melting |
| 09/11/1990 | US4955468 Separation of hydrocarbon mixtures |
| 09/11/1990 | CA1273962A1 Dehydrogenation process for production of styrene from ethylbenzene comprising low temperature heat recovery and modification of the ethyl-benzene-steam feed therewith |
| 09/10/1990 | CA2011858A1 Alkylation of organic aromatic compounds |
| 09/04/1990 | US4954224 N-mercaptoalkyl-2-pyrrolidone, n-alkyl-2-pyrrolidone, alcohol or cycloalkanol |
| 08/29/1990 | EP0384540A1 Process for isomerization of a hydrocarbon stream |
| 08/29/1990 | EP0383793A1 Process to produce aromatics of low acid-wash color |
| 08/28/1990 | US4952750 Melting crystalline phase of a crude product, separating, drawing off p-xylene |
| 08/28/1990 | US4952746 Desulfurizaiton, dehalogenation, denitrification, demetallizaiton, deoxygenation |
| 08/28/1990 | US4952305 Cooling, condensing and fractionating hydrocarbon stream; mixing higher hydrocarbons with residual gas used in scrubbing |
| 08/21/1990 | US4950834 Reacting benzene and propylene to produce cumene; omega type and Y type molecular sieves |
| 08/21/1990 | US4950824 Reacting monoisopropylnaphthalene with propylene and transalkylation of mixture formed |
| 08/21/1990 | CA1272949A1 Process for the separation of c in2 xx hydrocarbons from natural gas |
| 08/16/1990 | EP0382314A2 Vacuum distillation process |
| 08/16/1990 | EP0381720A1 Low pressure noncryogenic processing for ethylene recovery. |
| 08/14/1990 | US4948472 Extractive distillation of hydrocarbon mixtures employing mixed solvent |
| 08/14/1990 | US4948470 Extractive distillation of alkane/cycloalkane feed employing mixed solvent |
| 08/08/1990 | EP0380879A1 Removal of acidic impurities in processes for solvent extraction of aromatics from nonaromatics |
| 08/08/1990 | CN1044415A Adsorbant for purificn. of polyolefines and process for prepn. thereof |
| 08/08/1990 | CN1009111B Continous process for mercaptan extraction from highly definic feed stream |
| 08/07/1990 | US4946660 Desulphurization |
| 08/07/1990 | US4946594 Crosslinked copolymers of aliphatic polyester diols and dianhydrides |
| 08/01/1990 | EP0380374A1 Method of isomerizing butene-1 contained in isobutylene into butene-2 |
| 08/01/1990 | EP0380184A1 Removing hydrogen cyanide and carbon oxysulphide from a gas mixture |
| 08/01/1990 | EP0380001A1 Method for the separation by distillation of small quantities of middle boiling fractions from a liquid-mixture |
| 07/31/1990 | US4944880 Polyimide/aliphatic polyester copolymers |
| 07/31/1990 | US4944849 Extractive distillation of cycloalkane/alkane feed employing solvent mixture |
| 07/31/1990 | US4944848 Process for the purification of 1,1-diphenylethane with good fragrance quality |
| 07/31/1990 | CA2003344A1 Removal of acidic impurities in processes for solvent extraction of aromatics from nonaromatics |
| 07/25/1990 | EP0379394A1 Use of sorbent for the purification of polyolefins |
| 07/25/1990 | CA2008347A1 Removing hydrogen cyanide and carbon oxysulphide from a gas mixture |
| 07/18/1990 | EP0377949A2 Process and apparatus for C2 recovery |
| 07/18/1990 | CN1008814B Process for separating isomers of toluenediamine |
| 07/11/1990 | CN1043731A Hydrocarbon gas processing |
| 07/11/1990 | CN1008730B Process for producing 1-butene of improved purity from raw product of ethylene dimerization |
| 07/10/1990 | US4940832 Process for separating 2,6-dimethylnaphthalene |
| 07/10/1990 | US4940831 Purification of cis-olefins |
| 07/10/1990 | US4940830 Rejective separation of para-xylene from xylene isomers and ethylbenzene with zeolites |
| 07/10/1990 | US4940687 Catalyst and process for hydrogenation of unsaturated hydrocarbons |
| 07/10/1990 | US4940548 Chromatographic separation process for recovering individual diethyltoluene isomers |
| 07/04/1990 | EP0376235A2 Semipermeable membranes based on specified 4,4'-(1H-alkylidene)bis[2,3,6-trialkylphenol] type polyesters |
| 07/04/1990 | EP0376234A2 Semipermeable membranes based on specified tetrabromobisphenol type polyesters |
| 07/03/1990 | CA1271201A1 Product recovery method for dehydrocyclodimerization process |
| 06/27/1990 | CN1043309A Method for isolation and purification of coal tar-derived anthracene |
| 06/27/1990 | CA2006591A1 Semipermeable membranes bases on specified 4,4'-(1h-alkylidene) bis¬2,3,6,6-trialkylphenol| type polyesters |
| 06/26/1990 | US4936887 Distillation plus membrane processing of gas streams |
| 06/26/1990 | CA1270860A1 Continuous process for producing 5-vinyl-2-norbornene |
| 06/20/1990 | EP0373362A1 Method for preparing p-isobutylstyrene |
| 06/19/1990 | US4935580 Process for purification of hydrocarbons using metal exchanged clinoptilolite to remove carbon dioxide |
| 06/19/1990 | US4935579 Separation of m-diisopropylbenzene from p-diisopropylbenzene by azeotropic distillation with alcohols |
| 06/19/1990 | US4935571 Process for the purification of cyclobutenoarenes |
| 06/19/1990 | US4935400 Reduction of hydrocarbon losses in a molecular sieve hydrocarbon treating system |
| 06/19/1990 | US4935399 Reduction of hydrocarbon losses in a molecular sieve hydrocarbon treating system |
| 06/19/1990 | US4935043 Cryogenic process for desulphurization and gasoline removal of a gaseous mixture comprising methane containing H2 S and hydrocarbons having 2 carbon atoms and higher |
| 06/19/1990 | CA1270496A1 Process for the reducing fouling in higher olefin plants |
| 06/13/1990 | EP0372938A1 Zeolite composition for use in olefinic separations |
| 06/12/1990 | US4933499 Process for purification of alkenyl aromatic compounds containing a benzaldehyde impurity |
| 06/12/1990 | US4933314 Molecular sieving carbon |
| 06/12/1990 | CA1270240A1 Process for up-grading steam-cracking products |
| 06/12/1990 | CA1270183A1 Process for separating co.sub.2 from a gaseous mixture |
| 06/07/1990 | CA2003740A1 Zeolite composition for use in olefinic separations |
| 06/06/1990 | EP0371692A2 Verfahren zur Herstellung eines Ethers. |
| 06/05/1990 | US4931145 Separation of benzene from acetone by azeotropic distillation |
| 05/31/1990 | WO1990005710A2 Minimizing deactivation of ether synthesis catalyst |
| 05/30/1990 | EP0370611A2 Ethane recovery system |
| 05/30/1990 | EP0370200A1 Process for the recovery of p-xylene having a purity above 99.8 weight % |
| 05/29/1990 | US4929796 Separation of 2,7 diisopropylnaphthalene from a feed mixture comprising various diisopropylnaphthalene isomers with a zeolite adsorbent |
| 05/29/1990 | US4929788 Process for separating 1-dodecene and 1-tetradecene from an aluminum alkyl chain growth product |
| 05/29/1990 | US4929778 Methods and compositions for inhibiting styrene polymerization |
| 05/29/1990 | US4929358 Polyurethane-imide membranes and their use for the separation of aromatics from non-aromatics |
| 05/29/1990 | US4929357 Isocyanurate crosslinked polyurethane membranes and their use for the separation of aromatics from non-aromatics |
| 05/23/1990 | EP0369130A1 Method for the production of 1,1-diphenylethane with good odour quality |
| 05/23/1990 | CN1008066B Process for sulfur removal from hydrocarbons |
| 05/22/1990 | US4927950 Surface treatment |
| 05/16/1990 | EP0368138A1 Adsorbent for chromatography |
| 05/16/1990 | CN1007973B Improved dehydrogenation process for producing styrene by phenylethane |