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Class Information
Number: 585/805
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By plural serial diverse separations > To recover aromatic > Xylene or ethylbenzene
Description: Subject matter wherein the hydrocarbon is one or more xylene isomer(s).










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8648227 Method for extracting pure styrene from a pyrolysis benzine fraction Feb. 11, 2014
8617384 Integrated catalytic cracking gasoline and light cycle oil hydroprocessing to maximize p-xylene production Dec. 31, 2013
8609922 Energy conservation in heavy-hydrocarbon distillation Dec. 17, 2013
8608941 Reforming process with integrated fluid catalytic cracker gasoline and hydroprocessed cycle oil Dec. 17, 2013
8558046 Aromatic alkylation process Oct. 15, 2013
8524961 Integrated catalytic cracking and reforming processes to improve p-xylene production Sep. 3, 2013
8344200 Start up procedure in a process for purifying aromatic streams Jan. 1, 2013
8329971 Regeneration of catalyst used in purification of aromatic streams Dec. 11, 2012
8323581 Apparatus for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Dec. 4, 2012
8227654 Aromatic hydrocarbon purification method Jul. 24, 2012
8222474 Fractional extraction of butadiene Jul. 17, 2012
8198502 Process for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Jun. 12, 2012
8057664 Process for reducing bromine index of hydrocarbon feedstocks Nov. 15, 2011
8048388 Process of manufacturing para-xylene Nov. 1, 2011
7972568 Apparatus for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Jul. 5, 2011
7960600 Process for improved meta-xylene yield from C.sub.8 aromatics Jun. 14, 2011
7956157 Processes using dividing wall distillation column Jun. 7, 2011
7902414 Para-xylene production process employing in-situ catalyst selectivation Mar. 8, 2011
7815793 Process for reducing bromine index of hydrocarbon feedstock Oct. 19, 2010
7744750 Process for reducing Bromine Index of hydrocarbon feedstocks Jun. 29, 2010
7732624 Process for operating a continuous removal of a target product X in the form of fine crystals Jun. 8, 2010
7592499 Process for co-producing para-xylene and styrene Sep. 22, 2009
7556717 Method and device for extractive distillation Jul. 7, 2009
7468468 Process for separating meta-xylene from a feed of aromatic hydrocarbons by liquid phase adsorption Dec. 23, 2008
7420095 Purification process of aromatics Sep. 2, 2008
7381858 Xylene process using perm-selective separations Jun. 3, 2008
7358414 Para-xylene process using perm-selective separations Apr. 15, 2008
6986802 Selective separation of fluid compounds utilizing a membrane separation process Jan. 17, 2006
6781023 Decreasing Br-reactive contaminants in aromatic streams Aug. 24, 2004
6573418 Process for production of para-xylene incorporating pressure swing adsorption and simulated moving bed adsorption Jun. 3, 2003
6565742 Aromatics separation process and method of retrofitting existing equipment for same May. 20, 2003
6500996 Process for BTX purification Dec. 31, 2002
6489527 Process for improving purity of para-xylene product Dec. 3, 2002
6414210 Process for the separation of light olefins from paraffins Jul. 2, 2002
6410815 Agglomerated zeolite adsorbents, process for their preparation, and their use for adsorbing paraxylene from aromatic C8 fractions Jun. 25, 2002
6376733 Process for production of paraxylene Apr. 23, 2002
6376734 Process for the production of at least one isomer of xylenes that comprise an adsorption stage and an isomerization stage with an euo-structural-type catalyst Apr. 23, 2002
6376736 Production of high purity meta-xylene Apr. 23, 2002
6369287 Process for co-production and separation of ethylbenzene and paraxylene Apr. 9, 2002
6359186 Process for co-production of metaxylene and paraxylene Mar. 19, 2002
6348136 Method and apparatus for the purification of vinyl aromatic compounds Feb. 19, 2002
6332982 Apparatus for regulating the flow rate of at least one fluid in simulated moving bed separation units Dec. 25, 2001
6177604 Process for co-production and separation of ethylbenzene and paraxylene Jan. 23, 2001
6171449 Cascade reboiling of ethylbenzene/styrene columns Jan. 9, 2001
6080894 propylene oxide and styrene monomer co-production procedure Jun. 27, 2000
6063285 Apparatus for regulating the flow rate of at least one fluid in simulated moving bed separation units May. 16, 2000
6060634 Production of para-xylene from an effluent from paraselective toluene disproportionation using a crystallization process combined with simulated moving bed adsorption May. 9, 2000
6004452 Process for converting hydrocarbon feed to high purity benzene and high purity paraxylene Dec. 21, 1999
6005156 Para-xylene separation process comprising pretreatment by selective hydrogenation and by activated clay Dec. 21, 1999
5977426 Crystallization of 2,6-dimethylnaphthalene Nov. 2, 1999

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