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Class Information
Number: 585/809
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By plural serial diverse separations > To recover unsaturate
Description: Subject matter wherein an unsaturated hydrocarbon, e.g., an olefin, an alkyene, etc., is purified or separated out from a mixture.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7619126 |
Method for obtaining crude 1,3-butadiene from a C.sub.4 fraction |
Nov. 17, 2009 |
| 7572948 |
Fulvene purification |
Aug. 11, 2009 |
| 7554002 |
Method for cold supply to the low-temperature separation stage of an olefin plant |
Jun. 30, 2009 |
| 7547814 |
Separation of olefin vapor from liquid fraction to reduce fouling |
Jun. 16, 2009 |
| RE40752 |
Diene removal from an olefin feedstock |
Jun. 16, 2009 |
| 7528290 |
Apparatuses and methods for separating butene-1 from a mixed C.sub.4 feed |
May. 5, 2009 |
| 7527725 |
Upgrading drip oil |
May. 5, 2009 |
| 7501549 |
Benzene removal from FCC naphtha |
Mar. 10, 2009 |
| 7497896 |
Method of treating a gas mixture comprising propane and propylene |
Mar. 3, 2009 |
| 7495141 |
Minimizing corrosion in a methanol-to-olefin effluent processing system |
Feb. 24, 2009 |
| 7476775 |
Method and system for separating an oligomerization reactor effluent |
Jan. 13, 2009 |
| 7473815 |
Process for removal of catalyst residues from poly-.alpha.-olefins |
Jan. 6, 2009 |
| 7439413 |
Method for the production of isobutene from commericial methyl tert-butly ether |
Oct. 21, 2008 |
| 7437891 |
Recovery and purification of ethylene |
Oct. 21, 2008 |
| 7429686 |
Low pressure olefin recovery process |
Sep. 30, 2008 |
| 7411107 |
Alkene separation process |
Aug. 12, 2008 |
| 7411105 |
Process and installation for the oligomerization of olefins that use a membrane separation |
Aug. 12, 2008 |
| 7402720 |
Distillation process for removal of methyl acetylene and/or propadiene from an olefin stream |
Jul. 22, 2008 |
| 7399897 |
Method of separating olefins from mixtures with paraffins |
Jul. 15, 2008 |
| 7393992 |
Method for working up crude 1,3-butadiene |
Jul. 1, 2008 |
| 7393993 |
Method for removal of acetylenes from hydrocarbon streams |
Jul. 1, 2008 |
| 7388120 |
Removing carbon dioxide from an oxygenate to olefins reaction effluent |
Jun. 17, 2008 |
| 7388122 |
Dewaxing aid |
Jun. 17, 2008 |
| 7361799 |
Process for producing olefins |
Apr. 22, 2008 |
| 7361800 |
Process for the separation of olefins from paraffins using membranes |
Apr. 22, 2008 |
| 7348466 |
Solvent extraction |
Mar. 25, 2008 |
| 7332639 |
Process for producing olefins |
Feb. 19, 2008 |
| 7329790 |
Wet scrubbing and recycle of effluent-contaminating catalyst particles in an oxygenate-to-olefin process |
Feb. 12, 2008 |
| 7326820 |
System and method for purifying heptane |
Feb. 5, 2008 |
| 7326821 |
Removal of oxygenate from an olefin stream |
Feb. 5, 2008 |
| 7323612 |
Removal of condensable compounds from an olefin stream |
Jan. 29, 2008 |
| 7314965 |
Catalysts containing copper and zinc for the purification of ethylene |
Jan. 1, 2008 |
| 7311813 |
Distillation sequence for the purification and recovery of hydrocarbons |
Dec. 25, 2007 |
| 7304200 |
Method for separation of substances by extraction or by washing them with ionic liquids |
Dec. 4, 2007 |
| 7294749 |
Low pressure olefin recovery process |
Nov. 13, 2007 |
| 7288692 |
Process for producing olefins |
Oct. 30, 2007 |
| 7279012 |
Process for producing olefins |
Oct. 9, 2007 |
| 7273961 |
Quench process |
Sep. 25, 2007 |
| 7259288 |
Enhanced hydrogen recovery for hydroprocessing units |
Aug. 21, 2007 |
| 7250545 |
Method of separating olefins from mixtures with paraffins |
Jul. 31, 2007 |
| 7244873 |
Process and apparatus for separating oxygenate modifier from oligomerization effluent by water wash |
Jul. 17, 2007 |
| 7238848 |
Method for separating dimethyl ether from an olefin-containing product stream |
Jul. 3, 2007 |
| 7214840 |
Reduction of the Bromine Index of linear alkylbenzenes |
May. 8, 2007 |
| 7214846 |
Recovery of ethylene and propylene from a methanol to olefin reaction system |
May. 8, 2007 |
| 7208650 |
Recovery of ethylene and propylene from a methanol to olefin reaction system |
Apr. 24, 2007 |
| 7208648 |
Minimizing corrosion in a methanol-to-olefin effluent processing system |
Apr. 24, 2007 |
| 7138557 |
Selective dimethylether recovery and recycle in a methanol-to-olefin process |
Nov. 21, 2006 |
| 7135604 |
Process for separating carbon dioxide from an oxygenate-to-olefin effluent stream |
Nov. 14, 2006 |
| 7132580 |
Selective dimethylether and methanol recovery and recycle in a methanol-to-olefin process |
Nov. 7, 2006 |
| 7129387 |
Low capital implementation of distributed distillation in ethylene recovery |
Oct. 31, 2006 |
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