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Browse by Category: Main > Chemistry
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:
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Patent Number Title Of Patent Date Issued
8663461 Extraction process with novel solvent regeneration methods Mar. 4, 2014
8642828 Process for purifying a recycle stream from a 1,3-butadiene processing plant Feb. 4, 2014
8569562 Purification of isoprene from renewable resources Oct. 29, 2013
8557087 Process for the separation of a hydrocarbon-containing feed stream Oct. 15, 2013
8492605 Microbial derived isoprene and methods for making the same Jul. 23, 2013
8420879 Process for workup of a stream comprising butene and/or butadiene Apr. 16, 2013
8361280 Process for distillatively obtaining pure 1,3-butadiene from crude 1,3-butadiene Jan. 29, 2013
8324442 Microbial derived isoprene and methods for making the same Dec. 4, 2012
8309776 Method for contaminants removal in the olefin production process Nov. 13, 2012
8252150 Extractive distillation process for recovering butadiene from C.sub.4 hydrocarbon mixtures Aug. 28, 2012
8222474 Fractional extraction of butadiene Jul. 17, 2012
7994378 Process of butadiene-1, 3 extraction Aug. 9, 2011
7935855 Process and apparatus for treating a feed comprising butadiene May. 3, 2011
7718841 Extractive distillation May. 18, 2010
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
6491888 pH control method of reducing nitrogen oxides emission Dec. 10, 2002
6492513 Method for separating analogous organic compounds 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

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