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Class Information
Number: 585/836
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > Different, sequentially used agents
Description: Subject matter wherein a plurality of different agents are added one after the other to all or part of the feedstock.

Sub-classes under this class:

Class Number Class Name Patents
585/839 Later agent disengages earlier, e.g., decomplexing agent, etc. 29
585/837 One agent is a diluent, i.e., nonselective solvent or heat exchange material 10
585/838 Resolution of feed into more than two different components 14

Patents under this class:

Patent Number Title Of Patent Date Issued
8163967 Oxygenate conversion to olefins with enhanced carbonyl recovery Apr. 24, 2012
8101812 Extraction of hydrocarbons from hydrocarbon-containing materials Jan. 24, 2012
7781635 Surfactant-based purification of nanotubes Aug. 24, 2010
7718841 Extractive distillation May. 18, 2010
7629397 Phase separation process utilizing a hydrofluorocarbon Dec. 8, 2009
7572948 Fulvene purification Aug. 11, 2009
7402720 Distillation process for removal of methyl acetylene and/or propadiene from an olefin stream Jul. 22, 2008
7186876 Process to prepare a process oil Mar. 6, 2007
7060866 High pressure separation of dimethyl ether from an olefin stream Jun. 13, 2006
7015014 Isolation of carotenoid crystals Mar. 21, 2006
6875341 Process for enhancing the value of hydrocabonaceous natural recources Apr. 5, 2005
6844480 Method of separating dimethyl ether from an olefin stream Jan. 18, 2005
6812001 Isolation of carotenoid crystals from microbial biomass Nov. 2, 2004
6806398 Process for removing mercury from liquid hydrocarbon Oct. 19, 2004
6727398 Methods and systems for purifying styrene feedstock comprising use of low palladium catalyst Apr. 27, 2004
6559248 Process of removing contaminants from an olefin stream using extractive distillation May. 6, 2003
6410816 Processing oil and method for producing the same Jun. 25, 2002
6268543 Method of removing mercury in liquid hydrocarbon Jul. 31, 2001
6146520 Selective re-extraction of lube extracts to reduce mutagenicity index Nov. 14, 2000
6066238 Hydrocarbon separation May. 23, 2000
6037516 Method for removal of oxygenate impurities from organic chemical streams Mar. 14, 2000
5942654 Process for the removal of corrosive compounds from a fluid stream Aug. 24, 1999
5741932 Process for preparation of ajoene Apr. 21, 1998
5476986 Method for cleaning a mixture of air and vapor from volatile crude oil with recovery of the hydrocarbons, and a system for use in the method Dec. 19, 1995
5434329 Treatment of spent refinery caustic Jul. 18, 1995
5322927 Method for producing polymers Jun. 21, 1994
5220103 Process for the preparation of a cumene feed for cumene oxidation Jun. 15, 1993
5191149 Method of refining liquified petroleum gases into aerosol propellants Mar. 2, 1993
5120902 Process for the preparation of a cumene feed for cumene oxidation Jun. 9, 1992
5106484 Purifying feed for reforming over zeolite catalysts Apr. 21, 1992
4992618 Adsorptive separation process for the purification of heavy normal paraffins with non-normal hydrocarbon pre-pulse stream Feb. 12, 1991
4940831 Purification of cis-olefins Jul. 10, 1990
4642408 Method for the removal of nickel, aluminum and chlorine from olefin oligomers Feb. 10, 1987
4558168 Production of high purity butene-1 from an n-butane feedstock Dec. 10, 1985
4433194 Purification of cyclohexane Feb. 21, 1984
4401838 Purification of hydrocarbons by treatment with polyamines Aug. 30, 1983
4292141 Isolation of butadiene from a C.sub.4 -hydrocarbon mixture Sep. 29, 1981
4229607 Process for recovery of ethylene oligomers Oct. 21, 1980
4203927 Olefin oxidation process May. 20, 1980
4161496 Novel method of treating a charge hydrocarbon stream containing isobutene and also butadiene Jul. 17, 1979
4083772 Aromatic hydrocarbon separation process Apr. 11, 1978
4060567 Method of reducing .alpha.-acetylene content of hydrocarbon Nov. 29, 1977
4028485 Non-aqueous removal of soluble hydrogenation catalyst Jun. 7, 1977
4022839 Recovery of aluminum from ethylene telomer product May. 10, 1977

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