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Class Information
Number: 585/866
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > Organic agent > Acid, anhydride, ester or ether
Description: Subject matter wherein an agent contains the grouping -C--C- or -C-O-.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8686212 Process for treatment of ethylene Apr. 1, 2014
7956230 Reduction of organic halide contamination in hydrocarbon products Jun. 7, 2011
7906012 Method for reducing foam in a primary fractionator Mar. 15, 2011
7879225 Energy efficient and throughput enhancing extractive process for aromatics recovery Feb. 1, 2011
7696396 Method for extraction and concentration of carotenoids using supercritical fluids Apr. 13, 2010
7582312 Methods to produce lung surfactant formulations via lyophilization and formulations and uses thereof Sep. 1, 2009
7455763 Recycling process for demetalization of hydrocarbon oil Nov. 25, 2008
7435318 Ionic liquids as selective additives for separation of close-boiling or azeotropic mixtures Oct. 14, 2008
7388122 Dewaxing aid Jun. 17, 2008
7355087 Production of 1-alkenes from mixed olefin streams using catalytic distillation Apr. 8, 2008
7223331 Method for settling suspended fine inorganic solid particles from hydrocarbon slurry and additive for use therewith May. 29, 2007
7204927 Settling aids for solids in hydrocarbons Apr. 17, 2007
7048847 Settling aids for solids in hydrocarbons May. 23, 2006
6781026 Aromatics purification from petroleum streams Aug. 24, 2004
6617483 Polyalkylene glycol compositions for enhanced aromatic extraction Sep. 9, 2003
6576806 Process for separating C2-C3 olefins from industrial gases Jun. 10, 2003
6555726 Methods for enhanced extractive distillation employing extractive distillation compositions comprising sulfolane and compatibility agent Apr. 29, 2003
6410817 Ethylene recovery system Jun. 25, 2002
6395141 Separation of components from aromatic hydrocarbon mixtures thereof by extractive distillation May. 28, 2002
6395953 Process for preparing purified conjugated diene May. 28, 2002
6316685 Method for separating solids from hydrocarbon slurries Nov. 13, 2001
6175050 Process for separating functionalized alpha olefins from functionalized internal olefins Jan. 16, 2001
6165368 Method of controlling deposition of foulants in processing equipment used to process products streams produced by the dehydrogenation of aliphatic hydrocarbons Dec. 26, 2000
6136155 Separation of mesitylene from 1,2,4-trimetyhlbenzene by azeotropic distillation Oct. 24, 2000
6033529 Separation of mesitylene from 4-ethyl toluene by azeotropic distillation Mar. 7, 2000
5922193 Addition of ethers or aldehydes to furfural for aromatic extractions Jul. 13, 1999
5877385 Process including extractive distillation and/or dehydrogenation to produce styrene from petroleum feedstock including ethyl-benzene/xylene mixtures Mar. 2, 1999
5849982 Recovery of styrene from pyrolysis gasoline by extractive distillation Dec. 15, 1998
5840160 Separation of 3-carene from limonene by extractive distillation Nov. 24, 1998
5720857 Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene by azeotropic distillation Feb. 24, 1998
5714658 Process for the extraction of carotenes from natural sources Feb. 3, 1998
5698080 Separation of phellandrene from limonene by azeotropic distillation Dec. 16, 1997
5675055 Acidification/extraction treatment of waste caustic stream Oct. 7, 1997
5597455 Separation of 3-carene and limonene by extractive distillation Jan. 28, 1997
5582693 Separation of 3-carene and limonene by azeotropic distillation Dec. 10, 1996
5563315 Separation of aromatic hydrocarbons from a mixture of aromatic and non-aromatic hydrocarbons by solute swing extraction Oct. 8, 1996
5516965 Unsaturates recovery and recycle process May. 14, 1996
5481059 Settling aids for solids in hydrocarbons Jan. 2, 1996
5476987 Method of removing halogenated aromatic compound from hydrocarbon oil Dec. 19, 1995
5466345 Separation of o-xylene from p-xylene and m-xylene by azeotropic distillation Nov. 14, 1995
5460700 Separation of 1-hexene from hexane by extractive distillation Oct. 24, 1995
5458741 Separation of benzene from close boiling hydrocarbons by extractive distillation Oct. 17, 1995
5453167 Separation of xylenes by extractive distillation Sep. 26, 1995
5446233 Ethylene plant caustic system emulsion breaking with salts of alkyl sulfonic acids Aug. 29, 1995
5445715 Separation of m-xylene from xylenes by azeotropic distillation Aug. 29, 1995
5443697 Separation of heptane from 1-heptene by extractive distillation Aug. 22, 1995
5441608 Separation of xylenes by extractive distillation Aug. 15, 1995
5434330 Process and apparatus for separation of constituents of gases using gas hydrates Jul. 18, 1995
5417812 Separation of ethyl benzene from xylenes by azeotropic distillation May. 23, 1995
5405504 Separation of 1-decene from 2-octanone by azeotropic distillation Apr. 11, 1995

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