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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6395953 |
Process for preparing purified conjugated diene |
May. 28, 2002 |
| 6395141 |
Separation of components from aromatic hydrocarbon mixtures thereof by extractive distillation |
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 |
| 5405505 |
Separation of benzene from close boiling hydrocarbons by azeotropic distillation |
Apr. 11, 1995 |
| 5403448 |
Separation of 1-decene from 2-octanone by azeotropic distillation |
Apr. 4, 1995 |
| 5399244 |
Process to recover benzene from mixed hydrocarbons by extractive distillation |
Mar. 21, 1995 |
| 5391264 |
Separation of alpha-Phellandrene from d-limonene by azeotropic distillation |
Feb. 21, 1995 |
| 5382329 |
Separation of 1-decene from decane by azeotropic distillation |
Jan. 17, 1995 |
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