C07C 7 - Purification, separation orstabilisation of hydrocarbons; Use of additives

Patents for C07C 7 - Purification, separation orstabilisation of hydrocarbons; Use of additives (13,802)
12/1999
12/21/1999	US6005156 Para-xylene separation process comprising pretreatment by selective hydrogenation and by activated clay
12/21/1999	US6004435 Separation of cumene from 3-ethyl toluene by azeotropic distillation
12/16/1999	WO1999064718A1 A method for inhibiting hydrate formation
12/16/1999	WO1999064381A1 Production of high purity meta-xylene
12/15/1999	EP0963971A1 Method for inhibiting polymer formation in styrene processing
12/15/1999	CN1238238A Adsorbent for preparing meta-xylene by adsorption and separation and its preparing process
12/09/1999	DE19825295A1 Recovery of high purity alpha olefins from a Fischer Tropsch synthesis
12/08/1999	EP0931042A4 Process for concurrent selective hydrogenation of acetylenes and 1,2 butadiene in hydrocarbon streams
12/07/1999	CA2101524C Inhibiting popcorn polymer formation with esters of inorganic acids
12/02/1999	WO1999061396A1 Method for stabilizing unsaturated organic compounds from polymerization
12/01/1999	EP0960642A1 Device for controlling the flow of at least one fluid of separation units operating as simulated moving bed
12/01/1999	EP0960088A1 Process for selectively separating hydrogen, or both hydrogen and carbon monoxide from olefinic hydrocarbons
12/01/1999	EP0960087A1 Apparatus and method for separating olefins from an olefins-rich product stream
12/01/1999	EP0960086A1 Recovery of a secondary ethylene stream from an ethylene purification process
11/1999
11/25/1999	WO1999060072A1 Substance mixtures which comprise compounds containing vinyl groups and which comprise stabilizers
11/25/1999	WO1999059943A1 Olefin purification by adsorption of acethylenics and regeneration of adsorbent
11/25/1999	CA2332504A1 Olefin purification by adsorption of acethylenics and regeneration of adsorbent
11/24/1999	EP0959059A2 A method for inhibiting premature polymerization of vinyl aromatic monomers
11/24/1999	CN1235947A Preparation of olefins
11/24/1999	CN1046696C Process for purification of medium-chain olefines
11/24/1999	CN1046695C Method for recovering ethylene by using mixed refrigerant cycle
11/24/1999	CN1046694C Method for recovering ethylene by using open loop mixed refrigerant cycle
11/23/1999	CA2015789C Oligomerization of olefins
11/18/1999	DE19917967A1 Mixture of substances containing vinyl compounds to be stabilized against premature polymerisation, e.g. during purification or distillation
11/17/1999	EP0881925A4 Distillation of vinylaromatic monomer
11/17/1999	CN1046493C Method for inhibiting premature polymerization of vinyl aromatic monomers
11/16/1999	US5986157 Process for the removal of carbonyl compounds in isomerization feed streams
11/16/1999	US5986155 Catalytic process for making high reactivity alkylating agents and products resulting therefrom
11/16/1999	US5986153 Olefin color stabilization
11/16/1999	US5985940 Antifouling agents and reducing viscosity in quenching for ethylene plants and alkylphenol-formaldehyde polymers
11/10/1999	EP0955096A1 Process for sulphurizing a catalyst with an organic polysulphide and process for the purification of naphthalene with this sulphided catalyst
11/10/1999	CN1234787A Hydrocarbon gas processing
11/10/1999	CN1046215C Selective hydrogenation catalyst with metal in third main group and eighth group and use thereof
11/10/1999	CN1046213C Normal temp. zinc oxide desulfurizing agent and preparing method therefor
11/09/1999	US5981816 Using hydrosoluble neutral or positively charged homopolymers or copolymers, or polyampholytes, which derive from one or more nitrogen-containing monomers, to inhibit or retard hydrate formation, growth
11/09/1999	US5981421 Forming first mixture of a noble metal selected from group 8 of periodic table of elements in water and a second mixture of sulfonated aryl phosphine water soluble ligand in water and thereafter mixing the both mixtures together
11/09/1999	US5979178 Process for recovering olefins from cracked gases
11/09/1999	US5979177 Ethylene plant refrigeration system
11/04/1999	WO1999055797A1 Composition and method for radical polymerisation of ethylenically unsaturated monomers
11/04/1999	WO1999055648A1 Process for the hydrogenation of phenyl acetylene in a styrene-containing medium with the aid of a catalyst
11/04/1999	WO1999055647A1 Method for separating a c4 hydrocarbon mixture
11/04/1999	CA2330036A1 Process for the hydrogenation of phenyl acetylene in a styrene-containing medium with the aid of a catalyst
11/03/1999	EP0952973A1 Composition and method for inhibiting polymerization during the anaerobic production of styrene
11/03/1999	EP0952880A1 Device and method for recovering solvents from a hydrocarbon mixture contaminated with impurities
11/02/1999	US5977426 Crystallization of 2,6-dimethylnaphthalene
11/02/1999	US5977423 Mixed phase ethylation process for producing ethylbenzene
10/1999
10/28/1999	WO1999054038A1 Liquid clathrate compositions
10/28/1999	DE19835604A1 Verfahren zur Trennung von polycyclischen aromatischen Kohlenwasserstoffen (PAK) durch den Einsatz von calixarenmodifizierten Trennphasen für die Chromatographie A method of separating polycyclic aromatic hydrocarbons (PAH) through the use of calixarenmodifizierten separation phases for chromatography
10/28/1999	DE19818810A1 Separation of 4 carbon hydrocarbon mixture with recovery of highly pure 1,3-butadiene fraction
10/27/1999	EP0952134A1 Process for the separation of polycyclic aromatic hydrocarbons by chromatography
10/27/1999	EP0951463A1 Improved chemical absorption process for recovering olefins from cracked gases
10/27/1999	CN1232816A Process for isolating cyclopentane and/or cyclopentene
10/26/1999	US5973218 Process for producing cycloolefin
10/26/1999	US5973177 Heating chemical grade silicon under controlled conditions with a carbon source such that a reaction product of carbon monoxide and carbon dioxide are formed, which are predictive of the metalloid's performance in the direct process
10/26/1999	US5972172 Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene by extractive distillation
10/20/1999	EP0775099B1 Bf3 promoter process
10/20/1999	EP0742787B1 Process for preparing 2-ethyl-2-methylbutanoic acid from 3-methyl-2-pentene
10/20/1999	EP0715610B1 Isoparaffin-olefin alkylation
10/20/1999	EP0687248B1 Crystallization of 2,6-dimethylnaphthalene
10/19/1999	US5969203 Multistage distillation; improved yield
10/14/1999	WO1999051552A1 Apparatus for separation and purification of saturated hydrocarbon and method for separation and purification
10/13/1999	CN1231654A Process for concurrent selective hydrogenation of acetylenes and 1,2 butadiene in hydrocarbon streams
10/13/1999	CN1045585C Production of a high purity ether product
10/13/1999	CN1045543C Comprehensive purifying apparatus for waste acetone and toluene solvant
10/12/1999	US5964093 Gas hydrate storage reservoir
10/12/1999	CA2015067C Process for separating 1-tetradecene from triethylaluminum
10/07/1999	DE19814457A1 Production of 1,1-diphenyl ethylene useful in production of copolymers with styrene
10/06/1999	EP0947491A1 Highly pure squalane, raw material for pharmaceuticals and cosmetics prepared by using the same and method for producing the same
10/06/1999	EP0946471A1 Method for separating paraxylene comprising adsorption with water injection and crystallisation
10/06/1999	EP0946470A1 A method for preventing or retarding the formation of gas hydrates
10/05/1999	US5962756 Acidification; purification
10/05/1999	US5961695 Method for treating silane-containing gas
10/05/1999	US5960643 Production of ethylene using high temperature demethanization
10/05/1999	CA2173708C Process for the adsorption of chelated organometallic compounds and alumine beads containing a chelated organometallic compound
09/1999
09/30/1999	WO1999048996A1 Compositions and methods for inhibiting vinyl aromatic monomer polymerization
09/30/1999	DE19906034A1 High-purity squalane useful in cosmetic and pharmaceutical products, as vaccine adjuvant, for coating condoms and hypodermic needles, etc.
09/30/1999	DE19813720A1 Verfahren zur Herstellung von Olefinen A process for the production of olefins
09/29/1999	EP0945415A1 Process for the preparation of olefins
09/29/1999	EP0944563A1 Substance mixtures containing stabilizers and compounds containing vinyl groups
09/29/1999	EP0850209A4 Method for inhibiting hydrate formation
09/29/1999	CN1045286C Tech. for prepn. of high pureness metadimethyl benzene
09/29/1999	CN1045285C Combined distillation and permeation process for separation of oxygenated compounds from hydrocarbons
09/28/1999	US5959168 Zeolite-based ethylabenzene process adaptable to an aluminum chloride-based ethylbenzene plant
09/28/1999	US5958350 Extraction vessel for the removal of corrosive compounds from a fluid stream
09/28/1999	US5958223 Process for selective hydrogenation of heteroaromatic sulfur-containing and nitrogen-containing compounds
09/28/1999	US5956971 Introducing multi-component feed stream into separation system, cooling vapor stream rich in methane to liquefy and withdrawing portion of product; introducing second portion of liquefied stream to separation system to provide refrigeration
09/27/1999	CA2264305A1 Preparation of olefins
09/23/1999	WO1999047478A1 Process for producing purified 1,2-butadiene
09/22/1999	EP0943595A1 Process for the separation of alkenes and alkanes
09/22/1999	EP0777837A4 A method for inhibiting hydrate formation
09/21/1999	US5955643 Composition and method for inhibiting polymerization during the anaerobic of styrene
09/21/1999	US5955640 Integrated process for the production of butene-1
09/21/1999	US5955621 Recovery of Taxanes from conifers
09/21/1999	US5955045 Purification of hydrocarbon gases by reaction of nitrogen oxides with manganese dioxide to form manganese nitrate
09/21/1999	US5954924 Distillation of vinylaromatic monomer
09/21/1999	CA2010654C Process for isomerization of a hydrocarbon stream
09/15/1999	EP0754169B1 Single temperature stage crystalization to recover paraxylene
09/15/1999	CN1228753A Separation process in which membrane is used
09/15/1999	CN1228402A Process for preparing olefines by 2C or 3C alkyne gas phase selective hydrogeneration
09/14/1999	US5951916 Solutions of buckminsterfullerene (C60 ) in n-ethyl-2-pyrrolidone (NEP)

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