| Patents for C07C 7 - Purification, separation orstabilisation of hydrocarbons; Use of additives (13,802) |
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| 08/12/1981 | EP0033512A2 Separation of aromatic hydrocarbons from petroleum fractions |
| 08/11/1981 | US4283587 From a hydrocarbon feed using ion exchanged zeolite which has been treated with an alkyl amine hydrochloride |
| 08/11/1981 | US4283373 Treatment with alkali metal salts of sulfonamides |
| 08/11/1981 | US4283204 Process for the separation of contaminants from feed streams using magnetic beds |
| 08/11/1981 | CA1106775A1 Prepurification of toluene dealkylation effluent gas |
| 08/04/1981 | US4282389 Process for the simultaneous manufacture of pure MTBE and a substantially isobutene-free mixture of C4 -hydrocarbons |
| 08/04/1981 | CA1106153A1 Removal of acid gases from hot gas mixtures |
| 07/28/1981 | US4280881 Separating indene from unsaturated alkylaromatics |
| 07/28/1981 | US4280880 Method of operating an isostripper column |
| 07/21/1981 | US4279628 Apparatus for drying a natural gas stream |
| 07/15/1981 | EP0031815A1 Separating ethane from methane |
| 07/14/1981 | US4278505 Process of recovering an n-hexane product which is free from aromatic compounds |
| 07/14/1981 | US4278504 Isolation of a conjugated diolefin from a C4 - or C5 -hydrocarbon mixture |
| 07/14/1981 | CA1104995A1 Adsorbent for ethylene and process for preparation thereof |
| 07/14/1981 | CA1104950A1 Desorbent for separation of butene-1 from a c4 hydrocarbon mixture using zeolite x |
| 07/09/1981 | WO1981001842A1 Producing anthracene from creosote |
| 07/08/1981 | EP0031676A1 Selective sorption by zeolites |
| 07/07/1981 | US4277637 Treatment with sulfonic acid ion exchange resin |
| 07/07/1981 | US4277315 Isolation of a conjugated diolefin from a C4 - or C5 -hydrocarbon mixture |
| 07/07/1981 | US4277314 Multistage solvent extration and distillation |
| 07/07/1981 | US4277313 Recovery of 1,3-butadiene |
| 07/07/1981 | CA1104517A1 Energy conservation in a butadiene process |
| 06/30/1981 | US4276271 Process for the removal of hydrogen sulfide from gas mixtures |
| 06/30/1981 | US4276224 Anthraquinone sulphonamide compounds and preparation |
| 06/30/1981 | US4276057 Methane, propane |
| 06/30/1981 | CA1104087A1 Vapor pressure-adjusted motor fuel alkylate of reduced fluoride content |
| 06/30/1981 | CA1103902A1 Recovery of hydrocarbon vapors from air |
| 06/24/1981 | EP0030673A1 Method for inhibiting polymerization of conjugated dienes |
| 06/23/1981 | US4275257 Aluminum halide catalyst with a hydrogen halide |
| 06/23/1981 | US4274850 Rectification of natural gas |
| 06/23/1981 | US4274841 Acetylene recovery process and apparatus |
| 06/23/1981 | CA1103704A1 Catalytic alkylation process |
| 06/16/1981 | US4273566 Method and system for the fractionation of ethane-propane mixtures |
| 06/09/1981 | US4272344 Polymerization inhibitor for vinyl aromatic compounds |
| 06/09/1981 | US4272269 For hydrocarbons, absorption |
| 06/03/1981 | EP0029678A1 Recovery of C2 hydrocarbons from demethanizer overhead |
| 06/03/1981 | EP0029513A1 Process for the separation of olefines from gases containing olefines |
| 06/02/1981 | US4271322 Process for preparation of phenols |
| 06/02/1981 | US4270940 Condensation, rectification in dephlegmator, return to demethanizer |
| 06/02/1981 | US4270937 Absorbing sulfur-containing gases with carbon dioxide |
| 05/28/1981 | WO1981001459A1 Cryogenic distillative separation of acid gases from methane |
| 05/27/1981 | EP0029324A1 A distillative method of separating a methane overhead product from a mixture thereof with an acid gas, and the products thus obtained |
| 05/26/1981 | US4269668 Extractive distillation of C-4 hydrocarbons using modified alkoxynitrile solvent |
| 05/19/1981 | US4268361 Inhibiting polymerization in extractive distillation of C-4 hydrocarbons using alkoxynitrile-containing solvent |
| 05/13/1981 | EP0028377A1 Process for the preparation of a mixture essentially consisting of iso-butene oligomers and methyl-t-butyl ether, its use and fuels containing such a mixture |
| 05/12/1981 | US4267055 Adsorption on macroporous polymer |
| 05/12/1981 | US4267034 Separating olefins from paraffins with dimethyl sulfoxide extractant |
| 05/12/1981 | US4266958 By dehydration using methanol; and apparatus for use in a tanker ship |
| 05/05/1981 | US4266086 Catalytic cracking |
| 05/05/1981 | US4265788 Adsorbent for separating para-xylene, and process for the preparation thereof |
| 05/05/1981 | US4265735 ZSM-5 Zeolite catalyzes dialkyl disulfide conversion to hydrogen sulfide |
| 04/28/1981 | CA1099900A1 Process of regenerating laden absorbents |
| 04/28/1981 | CA1099898A1 No translation available |
| 04/21/1981 | US4263467 Recovery of boron trifluoride from a hydrocarbon liquid |
| 04/21/1981 | US4263019 Vapor recovery |
| 04/21/1981 | CA1099749A1 Removal of carbonyl impurities |
| 04/15/1981 | EP0026832A1 Process for the purification of isoleucine |
| 04/07/1981 | US4260840 Butene-1 containing feed purification process(CS-165) |
| 04/07/1981 | US4260476 Separation of aromatic hydrocarbons from petroleum fractions |
| 04/01/1981 | EP0025919A1 A process for preferentially removing more planar molecules from mixtures with less planar molecules |
| 03/25/1981 | EP0025765A1 Process for the separation with the aid of sulfon amides of dienic and/or aromatic hydrocarbons from hydrocarbon mixtures containing them |
| 03/25/1981 | EP0025764A1 Process for the preparation of aliphatic sulfonamides |
| 03/24/1981 | US4257877 Selective hydrogenation process |
| 03/24/1981 | US4257794 Method of and apparatus for separating a gaseous hydrocarbon mixture |
| 03/17/1981 | US4256476 Low temperature process for the recovery of ethane from thermal hydrocracking vent gases |
| 03/17/1981 | CA1097564A1 Process for the recovery of ethane and heavier hydrocarbon components from methane-rich gases |
| 03/11/1981 | EP0024746A1 Process for the absorption and removal of hydrogen sulphide as elemental sulphur from gases or gas mixtures, and an alkaline solution containing a derivative of anthraquinone sulfonic acid amide |
| 03/10/1981 | US4255607 Separation of C8 aromatic isomers |
| 03/10/1981 | US4255598 Dissolving thiodipropionic acid or di(alkyl) ester therein, storage stability, antioxidant |
| 03/03/1981 | US4254296 Process for the preparation of tertiary olefins |
| 03/03/1981 | US4253851 Gas purification treatment apparatuses, systems and process |
| 03/03/1981 | CA1096889A1 Separation of isobutene from refinery streams |
| 03/03/1981 | CA1096779A1 Process for the separation of unsaturated compounds from liquid hydrocarbon mixtures |
| 03/03/1981 | CA1096624A1 Method for cryogenic separation of carbon dioxide from hydrocarbons |
| 02/24/1981 | US4252615 Polymerization inhibitor for vinyl aromatic compounds |
| 02/24/1981 | US4252548 By scrubbing with cold methanol |
| 02/24/1981 | CA1096326A1 Method of reducing alpha-acetylene content of hydrocarbons using an alkali amide |
| 02/17/1981 | US4251493 Desulfurization using anthraquinone sulfonamide and compound of polyvalent metal |
| 02/04/1981 | EP0023370A1 Process for the recovery of isoprene, and isoprene so recovered |
| 02/03/1981 | US4247987 Continuous countercurrent fluid-solids contacting process stabilized by a magnetic field |
| 01/28/1981 | EP0023119A1 Process for preparation of high purity isobutylene |
| 01/27/1981 | US4247729 Process for producing high purity benzene |
| 01/27/1981 | US4247725 Selective hydrogenation using particles of group 8 metal as catalyst; fluid flow |
| 01/21/1981 | EP0022612A1 A process for the removal of cumene from a gaseous stream |
| 01/21/1981 | EP0022510A1 Process for the recovery of isobutene from mixtures of C4-hydrocarbons containing isobutene |
| 01/21/1981 | EP0022509A1 Process for the simultaneous production of methyl-tert.-butylether and obtaining isobutene |
| 01/20/1981 | US4246243 Yielding free sulfur and iron hydroxides |
| 01/20/1981 | US4246079 Electrolytic reduction of sulfidic spent alkali metal wastes |
| 01/20/1981 | US4246073 Heat exchanging |
| 01/20/1981 | US4246015 Freeze-wash method for separating carbon dioxide and ethane |
| 01/20/1981 | CA1094109A1 Butadiene recovery process |
| 01/07/1981 | EP0021490A1 Process for the recovery of ethylene oligomers |
| 01/07/1981 | EP0021479A1 Process and plant for the removal of acidic components |
| 01/07/1981 | EP0021021A1 Device for the recovery of xylene and/or paraffin and similar substances for histological purposes |
| 01/06/1981 | US4243831 Using charcoal, alumina, silica, diatomaceous earth, montmorillonite clays, and kaolin |
| 12/30/1980 | US4242530 Process for separating isobutene from C4 streams |
| 12/23/1980 | CA1091897A1 Removal of co.sub.2 and/or h.sub.2s from gases |
| 12/16/1980 | US4239510 Natural gas purification |
| 12/16/1980 | US4239508 Cumene recovery |
| 12/16/1980 | US4239506 Use of aqueous, non-sweep liquid during membrane separation |