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Class Information
Number: 585/807
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By plural serial diverse separations > To recover aromatic > Including steps of distillation and agent addition
Description: Subject matter in which the plural separations include distillation and the addition of an extraneous agent.










Sub-classes under this class:

Class Number Class Name Patents
585/808 Agent contains n, carbonyl, or dihydroxy moiety 52


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8673134 Removal of nitrogen compounds from FCC distillate Mar. 18, 2014
8663461 Extraction process with novel solvent regeneration methods Mar. 4, 2014
8648227 Method for extracting pure styrene from a pyrolysis benzine fraction Feb. 11, 2014
8552245 Method for treating a cracked gas stream from a hydrocarbon pyrolysis installation and installation associated therewith Oct. 8, 2013
8536397 Recovery of benzene and benzene derivatives from gasoline fraction and refinery streams Sep. 17, 2013
8507745 Processes and systems for treating aromatic feed including an aromatic component and nitrogen-containing impurities, and processes and systems for preparing a reaction product of the aromatic Aug. 13, 2013
8471087 Process that utilizes combined distillation and membrane separation in the separation of an acidic contaminant from a light hydrocarbon gas stream Jun. 25, 2013
8395002 Use of catalytic distillation for benzene separation and purification Mar. 12, 2013
8362313 Processes and systems for recovery of styrene from a styrene-containing feedstock Jan. 29, 2013
8193405 Metathesis unit pretreatment process with formation of octene Jun. 5, 2012
8178061 Propylene recovery during regeneration of an oxygenate removal unit May. 15, 2012
8124824 System and method for using super critical state carbon dioxide (CO.sub.2) as a hydrocarbon diluent Feb. 28, 2012
7994378 Process of butadiene-1, 3 extraction Aug. 9, 2011
7956231 Method for separation of olefins Jun. 7, 2011
7923591 Method and device for producing lower olefins from oxygenates Apr. 12, 2011
7897827 Propylene recovery during regeneration of an oxygenate removal unit Mar. 1, 2011
7709693 Toluene production May. 4, 2010
7687677 Process for recovering thermal energy from a reactor effluent stream Mar. 30, 2010
7556717 Method and device for extractive distillation Jul. 7, 2009
7348466 Solvent extraction Mar. 25, 2008
7094937 Compositions comprising cyclohexamantane Aug. 22, 2006
6960279 Method for stabilizing vinyl aromatic monomers using selected polymerization inhibitors and polymers prepared therewith Nov. 1, 2005
6838587 Method of removing oxygenate contaminants from an olefin stream Jan. 4, 2005
6664433 Process for the purification of aromatic hydrocarbons and process for the preparation of high-purity aromatic hydrocarbons Dec. 16, 2003
6565742 Aromatics separation process and method of retrofitting existing equipment for same May. 20, 2003
6545192 Process for separating olefins from saturated hydrocarbons Apr. 8, 2003
6483000 Process for the manufacture in pure form of 1-pentene or an alpha-olefin lower than 1-pentene Nov. 19, 2002
6395953 Process for preparing purified conjugated diene May. 28, 2002
6392115 Separation of hydrocarbons by extractive distillation May. 21, 2002
6348136 Method and apparatus for the purification of vinyl aromatic compounds Feb. 19, 2002
5972172 Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene by extractive distillation Oct. 26, 1999
5942655 Process for the removal of heavy hydrocarbonaceous co-products from a vapor effluent from a normally gaseous hydrocarbon dehydrogenation reaction zone Aug. 24, 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
5763714 Process and apparatus for the production and recovery of p-xylene Jun. 9, 1998
5723026 Process for recovering pure benzene and pure toluene from aromatic hydrocarbon products Mar. 3, 1998
5672804 Process for the removal of polynuclear aromatic compounds from a vapor effluent from a normally gaseous hydrocarbon dehydrogenation reaction zone Sep. 30, 1997
5663337 Pharmaceutically active benzoquinazoline compounds Sep. 2, 1997
5630914 Method and apparatus for decontaminating a liquid May. 20, 1997
5554264 Multiple reboiler system Sep. 10, 1996
5417812 Separation of ethyl benzene from xylenes by azeotropic distillation May. 23, 1995
5399244 Process to recover benzene from mixed hydrocarbons by extractive distillation Mar. 21, 1995
5275702 Distillation method of separating organic solvents Jan. 4, 1994
5202520 Method for aromatic hydrocarbon recovery Apr. 13, 1993
5185486 Method of reducing the benzene content of gasolines Feb. 9, 1993
5073669 Method for aromatic hydrocarbon recovery Dec. 17, 1991
5062948 Mercury removal from liquid hydrocarbon compound Nov. 5, 1991
5032232 Extractive distillation of hydrocarbon mixtures Jul. 16, 1991
5012034 Process for separating styrene from styrene-containing hydrocarbon streams Apr. 30, 1991
5004853 Continuous process for the production of 2,6-dimethylnaphthalene Apr. 2, 1991

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