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Class Information
Number: 585/810
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By plural serial diverse separations > To recover unsaturate > Diolefin
Description: Subject matter wherein a recovered product has two double bonds.
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 |
| 7527725 |
Upgrading drip oil |
May. 5, 2009 |
| 7501549 |
Benzene removal from FCC naphtha |
Mar. 10, 2009 |
| 7393992 |
Method for working up crude 1,3-butadiene |
Jul. 1, 2008 |
| 7348466 |
Solvent extraction |
Mar. 25, 2008 |
| 7304200 |
Method for separation of substances by extraction or by washing them with ionic liquids |
Dec. 4, 2007 |
| 7226527 |
Method for recovering crude 1,3-butadiene by extractive distillation from a C.sub.4 cut |
Jun. 5, 2007 |
| 7157533 |
Process of obtaining an isoprene-enriched FCC C5 fraction and selective polymerization of isoprene from said fraction |
Jan. 2, 2007 |
| 7019188 |
Use of ionic liquids to separate olefins, diolefins and aromatics |
Mar. 28, 2006 |
| 6911569 |
Sulfur resistant adsorbents |
Jun. 28, 2005 |
| 6849774 |
Separation of dienes from olefins using ionic liquids |
Feb. 1, 2005 |
| 6802959 |
Separation of olefinic hydrocarbons from sulfur-containing hydrocarbons by use of a solvent |
Oct. 12, 2004 |
| 6737557 |
Hydrocarbon upgrading process |
May. 18, 2004 |
| 6548726 |
Removal of DEHA from butadiene streams |
Apr. 15, 2003 |
| 6492513 |
Method for separating analogous organic compounds |
Dec. 10, 2002 |
| 6491888 |
pH control method of reducing nitrogen oxides emission |
Dec. 10, 2002 |
| 6407304 |
Process for the isolation of high boilers from the cyclooligomerization of 1,3-butadiene |
Jun. 18, 2002 |
| 6395953 |
Process for preparing purified conjugated diene |
May. 28, 2002 |
| 6376735 |
Process to remove reaction by-products from a selective hydrogenation effluent stream |
Apr. 23, 2002 |
| 6271428 |
Process for the purification of a diolefin hydrocarbon stream |
Aug. 7, 2001 |
| 6225515 |
Process for the purification of a diolefin hydrocarbon stream |
May. 1, 2001 |
| 6215037 |
Method for selective adsorption of dienes |
Apr. 10, 2001 |
| 6175049 |
Process for the production of 1, 2-butadiene |
Jan. 16, 2001 |
| 6093285 |
Purification of 1,3-butadiene |
Jul. 25, 2000 |
| 6015933 |
Process for removing polymeric by-products from acetylene hydrogenation product |
Jan. 18, 2000 |
| 5939596 |
Butadiene removal system for ethylene plants with front end hydrogenation systems |
Aug. 17, 1999 |
| 5763715 |
Butadiene removal system for ethylene plants with front end hydrogenation systems |
Jun. 9, 1998 |
| 5630914 |
Method and apparatus for decontaminating a liquid |
May. 20, 1997 |
| 5340554 |
NOx removal process |
Aug. 23, 1994 |
| 5336827 |
Process for producing an oligomer |
Aug. 9, 1994 |
| 5304699 |
Process for the removal of green oil from a hydrocarbon stream |
Apr. 19, 1994 |
| 5191062 |
Steam purging of granular EPDM resins |
Mar. 2, 1993 |
| 4885063 |
Method and apparatus for olefin recovery |
Dec. 5, 1989 |
| 4859286 |
Isolation of 1,3-butadiene |
Aug. 22, 1989 |
| 4647344 |
Recovery of isoprene from a C.sub.5 -hydrocarbon mixture |
Mar. 3, 1987 |
| 4520225 |
Process for the pretreatment of light olefin fractions |
May. 28, 1985 |
| 4515661 |
Process for separating highly pure butene-1 and butene-2 |
May. 7, 1985 |
| 4479023 |
Process for the oligomerization of light olefin fractions in the presence of a boron trifluoride catalyst |
Oct. 23, 1984 |
| 4455447 |
Process for upgrading hydrocarbon streams comprising conjugated diolefins |
Jun. 19, 1984 |
| 4438289 |
Reduction of cyclopentadiene from isoprene streams |
Mar. 20, 1984 |
| 4421607 |
Process for extractive distillation of plural hydrocarbon mixtures |
Dec. 20, 1983 |
| 4401515 |
Process for producing 1,3-butadiene or 2-methyl-1,3-butadiene having high purity |
Aug. 30, 1983 |
| 4392004 |
Reduction of cyclopentadiene from isoprene streams |
Jul. 5, 1983 |
| 4390742 |
Reduction of cyclopentadiene from isoprene streams |
Jun. 28, 1983 |
| 4348260 |
Method for inhibiting polymerization of conjugated dienes |
Sep. 7, 1982 |
| 4316796 |
Process for the separation of dienic and/or aromatic hydrocarbons present in hydrocarbon fractions |
Feb. 23, 1982 |
| 4292141 |
Isolation of butadiene from a C.sub.4 -hydrocarbon mixture |
Sep. 29, 1981 |
| 4278504 |
Isolation of a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture |
Jul. 14, 1981 |
| 4277315 |
Isolation of a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture |
Jul. 7, 1981 |
| 4269668 |
Extractive distillation of C-4 hydrocarbons using modified alkoxynitrile solvent |
May. 26, 1981 |
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