| Patents for C07C 7 - Purification, separation orstabilisation of hydrocarbons; Use of additives (13,802) |
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| 05/15/1990 | US4925635 Temperature control for a KOH treater |
| 05/15/1990 | US4925535 Process for the production of an aromate concentrate suitable for use as blending component for gasification fuel |
| 05/15/1990 | US4925460 Adsorption; lithium exchanged |
| 05/15/1990 | US4925459 Using molecular sieve zeolite |
| 05/09/1990 | EP0366844A1 Selective separation of aromatic hydrocarbons from a mixture of aromatic and saturated hydrocarbons using polyethylene glycol impregnated hydrophilic membranes |
| 05/09/1990 | CN1041935A Method and device for separating c2-stream |
| 05/08/1990 | US4923961 Process for deodorizing isobutylene polymer |
| 05/02/1990 | EP0366211A2 Process for producing alpha olefins |
| 05/01/1990 | US4921924 Isoprene recovery in the butyl rubber process |
| 05/01/1990 | US4921581 Extractive distillation of hydrocarbons employing solvent mixture |
| 05/01/1990 | US4921514 From high pressure natural gas or refinery feed gas |
| 04/24/1990 | US4919816 Using ion exchange resins to reduce corrosion |
| 04/18/1990 | EP0364157A2 Hydrogenated deodorized polyisobutylenes for cosmetics |
| 04/18/1990 | CN1041385A Process for removing impurities from aromatic stream |
| 04/11/1990 | EP0362857A1 Process and apparatus for processing a C2 stream |
| 04/10/1990 | US4915873 Polymerization inhibitor composition for vinyl aromatic compounds |
| 04/10/1990 | US4915176 Injecting an antiagglomerant to form a dispersion; petroleum oil and gas from ocean wells |
| 04/10/1990 | CA1267659A1 Inhibiting polymerization of vinyl aromatic monomers |
| 04/10/1990 | CA1267609A1 Separation of water from organic liquids |
| 04/05/1990 | WO1990003355A1 Process for removing impurities from an aromatic stream |
| 04/03/1990 | US4914257 Precipitating complex, distilling solvent |
| 04/03/1990 | CA1267269A1 Regenerative process for the elimination of mercaptans carried in a gas |
| 03/28/1990 | EP0360704A1 Process for removing impurities from an aromatic stream |
| 03/28/1990 | EP0360041A2 Method and apparatus for optimizing the operation of a rectification column provided with a lateral boiler |
| 03/21/1990 | EP0359628A1 Process and installation for the recuperation of the most heavy hydrocarbons in a mixture of gases |
| 03/21/1990 | CN1040576A Technology for production of refined naphthalene by crystalization in solvents |
| 03/21/1990 | CN1007254B Recovery isoprene in preparing butyl rubber |
| 03/21/1990 | CN1007244B Method of recovering propane and heavy hydrocarbon from hydrocarbon gas |
| 03/20/1990 | CA1266834A1 Process for separating isoprene |
| 03/07/1990 | EP0357418A1 Use of triphenylphosphine as an ethylene furnace antifoulant |
| 03/01/1990 | DE3829562A1 Process for recovering pure methane from natural gas |
| 02/27/1990 | US4904346 Separation of m-diisopropyl benzene from p-diisopropyl benzene by extractive distillation |
| 02/20/1990 | US4902843 Process for producing M-xylene from O-xylene |
| 02/14/1990 | EP0354316A1 Process for the deep desulphurisation of hydrocarbons |
| 02/14/1990 | CN1039576A Process and apparatus for separating hydrocarbons |
| 02/14/1990 | CN1006786B Process for distillation of styrenes |
| 02/13/1990 | US4900717 Recovery of 2,6-dialkyl-naphthalene isomers |
| 02/13/1990 | US4900426 Triphenylphosphine oxide as an ethylene furnace antifoulant |
| 02/07/1990 | CN1039408A Hydrocarbon gas processing |
| 02/06/1990 | US4899017 Process for the selective separation of para-xylene from C8 aromatic mixtures |
| 02/06/1990 | US4899016 Novel bed regeneration procedure |
| 02/06/1990 | US4898722 Synthesis of crystalline SAPO-37 |
| 01/31/1990 | EP0352870A1 Distillative separation employing bottom additives |
| 01/30/1990 | US4897098 Fractionation system for stabilizing natural gasoline |
| 01/23/1990 | US4895997 Olefin isomerization process |
| 01/23/1990 | US4895584 Ethane, ethylene, methane, cooling, condensation, distillation, heat exchanging, evaporation |
| 01/17/1990 | EP0350659A1 Process for the separation of paraffinic and olefinic C4-hydrocarbons |
| 01/17/1990 | CN2051129U Tower liquid film crystallizing device with filling tube sheet |
| 01/16/1990 | US4894210 Purification of a hydrocarbon mixture |
| 01/11/1990 | DE3822174A1 Process for the recovery of methane |
| 01/09/1990 | US4892564 Membrane process for hydrocarbon liquid recovery |
| 12/28/1989 | WO1989012794A1 Low pressure noncryogenic processing for ethylene recovery |
| 12/26/1989 | US4889614 Methods for retarding coke formation during pyrolytic hydrocarbon processing |
| 12/26/1989 | US4889545 Hydrocarbon gas processing |
| 12/20/1989 | EP0346843A1 Process for separating 2,6-dimethylnaphthalene |
| 12/20/1989 | EP0346842A1 Process for separating 2,6-dimethylnaphthalene |
| 12/20/1989 | CN1038087A Production of purified naphthalene |
| 12/12/1989 | US4886930 Zeolitic para-xylene separation with tetralin heavy desorbent |
| 12/12/1989 | US4886929 Separation of para-xylene |
| 12/05/1989 | US4885418 Treating with a water-containing anion exchanger in the oh form |
| 12/05/1989 | US4885096 Using rubber copolymer of conjugated dienes and nitriles |
| 12/05/1989 | US4885063 Method and apparatus for olefin recovery |
| 11/30/1989 | WO1989011466A1 Process and apparatus for hydrotreating olefinic distillate |
| 11/29/1989 | EP0343901A2 Method and apparatus for recovering high purity toluene, hexane titanium tetrachloride and tetrahydrofuran from mixtures |
| 11/29/1989 | CN1037499A Process for preparing p-xylene with at least 99.5% pureness |
| 11/29/1989 | CN1037462A Seperation of water from hydrocarbons and halogenated hydrocarbons |
| 11/28/1989 | US4883515 Processing hydrocarbon gases with selected physical solvents |
| 11/28/1989 | US4883514 Extracting methane from inert gases |
| 11/21/1989 | US4881960 Scrubbing |
| 11/21/1989 | CA1263085A1 Method and apparatus for cryogenic fractionation of a gaseous feed |
| 11/16/1989 | DE3815324A1 Process for obtaining p-xylene having a purity of at least 99.5% |
| 11/14/1989 | US4880505 Separation of M-diisopropylbenzene from P-diisopropylbenzene by azeotropic distillation with esters |
| 11/08/1989 | EP0340487A2 Process for the recovery of p-xylene with a purity of at least 99,5% |
| 11/02/1989 | EP0339118A1 Preparation of polymorphically pure terfenadine |
| 10/31/1989 | US4877920 Treating with copper oxide on active carbon support |
| 10/31/1989 | US4877533 Pervaporation; membrane with active layer of polyunsaturated acid or salt |
| 10/31/1989 | US4877491 Separation of m-diisopropyl benzene from p-diisopropyl benzene by azeotropic distillation with ketones |
| 10/25/1989 | EP0338309A2 Process for the isomerisation of alkenes with a terminal double bond to internal alkenes |
| 10/19/1989 | WO1989009642A1 Matrix membrane |
| 10/17/1989 | US4874524 Separation of adsorbed components by variable temperature desorption |
| 10/17/1989 | US4873835 Process for the simultaneous exchange of heat and matter through a porous wall |
| 10/17/1989 | CA1262366A1 Extraction of aromatics with ethyl acetoacetate |
| 10/17/1989 | CA1262365A1 Extraction of aromatics with n-cyclohexyl-2- pyrrolidone |
| 10/17/1989 | CA1262360A1 Process for separating isomers of toluenediamine |
| 10/11/1989 | EP0336564A1 Process for separating methyl derivatives of naphthalene according to crystallization under pressure |
| 10/11/1989 | EP0336535A1 Gas separation by composite solvent-swollen membranes |
| 10/11/1989 | EP0336241A2 Composite membranes, process for their production and their use |
| 10/11/1989 | EP0336105A2 Method for enhancing the polymerization activity of crude cycloolefin monomers for bulk polymerization |
| 10/10/1989 | CA1262203A1 Process and apparatus for the removal of hydrogen sulphide from a gas mixture |
| 10/04/1989 | EP0334941A1 Increasing the level of 2-methyl-2-butene in isoamylene |
| 09/27/1989 | EP0334742A1 Liquid phase selective hydrogenation of a normally gaseous feedstock containing ethylene, acetylene and naptha |
| 09/27/1989 | EP0334500A1 Vinyl aromatic compositons stabilized against polymerization |
| 09/27/1989 | EP0334114A2 Membrane process for hydrocarbon liquid recovery |
| 09/26/1989 | US4869809 Aromatics extraction process control |
| 09/26/1989 | US4869740 Hydrocarbon gas processing |
| 09/26/1989 | CA1261886A1 Method for prevention of fouling in a basic solution by addition of specific nitrogen compounds |
| 09/26/1989 | CA1261282A1 Process for the removal of phenolic inhibitors from polymerizable conjugated olefins |
| 09/26/1989 | CA1260846A1 Process for separating ethylbenzene from xylenes by selective adsorption on a beta zeolite |
| 09/20/1989 | CN1035625A Process for separation of organism from mixture of air/permanent gas |
| 09/19/1989 | US4868308 From nicotinic acid derivatives and a sulfamic acid |