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Class Information
Number: 585/478
Name: Chemistry of hydrocarbon compounds > Aromatic compound synthesis > By isomerization > With plural separation steps
Description: Subject matter in which more than one separation step is performed.










Sub-classes under this class:

Class Number Class Name Patents
585/479 Including a crystallization step 33


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8692044 Process for producing para-xylene Apr. 8, 2014
8609922 Energy conservation in heavy-hydrocarbon distillation Dec. 17, 2013
8569559 Paraxylene production process and apparatus Oct. 29, 2013
8541639 Process for producing para-xylene Sep. 24, 2013
8367875 Process for the preparation of m-substituted alkyltoluenes by isomerization with ionic liquids as catalysts Feb. 5, 2013
8273934 Process for producing para-xylene Sep. 25, 2012
8221707 Process for isomerizing a non-equilibrium alkylaromatic feed mixture and an aromatic production facility Jul. 17, 2012
7960600 Process for improved meta-xylene yield from C.sub.8 aromatics Jun. 14, 2011
7932426 Process for isomerizing a non-equilibrium alkylaromatic feed mixture and an aromatic production facility Apr. 26, 2011
7687674 Low temperature process for recovering and producing para-xylene and heat exchange network therefore Mar. 30, 2010
7626065 Process for producing para-xylene Dec. 1, 2009
7439412 Process for producing para-xylene Oct. 21, 2008
7381858 Xylene process using perm-selective separations Jun. 3, 2008
7371912 Process for making xylene isomer using a deheptanizer with a side draw recycle May. 13, 2008
7358414 Para-xylene process using perm-selective separations Apr. 15, 2008
7271305 Method of obtaining para-xylene Sep. 18, 2007
7270792 Process for producing para-xylene Sep. 18, 2007
RE39222 Process for preparing 2,6-dialkylnaphthalene Aug. 1, 2006
6878855 Process for producing para-xylene Apr. 12, 2005
6573418 Process for production of para-xylene incorporating pressure swing adsorption and simulated moving bed adsorption Jun. 3, 2003
6528695 Process for the production of an isomer of xylenes in three stages: separation, isomerization in the presence of a catalyst based on an EUO zeolite and transalkylation Mar. 4, 2003
6512154 Production of a xylene isomer in three stages: separation, isomerization with a catalyst with an EUO zeolite base and transalkylation with recycling of C10-aromatic compounds Jan. 28, 2003
6492525 Organometallic complexes comprising cationic heterocyclic carbenes Dec. 10, 2002
6448459 Process for the production of paraxylene that comprises an adsorption stage, a liquid phase isomerization stage and a gas phase isomerization stage with an euo-type zeolite Sep. 10, 2002
6376733 Process for production of paraxylene Apr. 23, 2002
6337427 Process for isomerizing aromatic cuts containing eight carbon atoms using a catalyst containing a zeolite with an EUO type structure Jan. 8, 2002
6271429 Process for isomerizing and dehydrogenating aromatic compounds containing eight carbon atoms with different catalysts Aug. 7, 2001
6198014 Process for isomerizing aromatic compounds containing eight carbon atoms comprising a recycle Mar. 6, 2001
6147269 Isomerization with an EUO-type catalyst of aromatic compounds with eight carbon atoms followed by a dehydrogenation stage Nov. 14, 2000
6121501 Process for preparing 2,6-dialkylnaphthalene Sep. 19, 2000
6072098 Process for producing highly pure 2,6-dimethylnaphthalene Jun. 6, 2000
6018087 Isomerization of dimethylnaphthalene to produce 2,6-dimethylnaphthalene Jan. 25, 2000
5998688 Xylene isomerization process using toluene co-feed Dec. 7, 1999
5977420 Dual-loop xylene isomerization process Nov. 2, 1999
5948949 Process for producing 2,6-dimethylnaphthalene Sep. 7, 1999
5922924 Process for the separation of p-xylene in C.sub.8 aromatic hydrocarbons with a simulated moving bed adsorption and a crystallization Jul. 13, 1999
5866706 Preparation and separation of RAC and MESO compound mixtures Feb. 2, 1999
5763714 Process and apparatus for the production and recovery of p-xylene Jun. 9, 1998
5744670 Process for preparing dialkylnaphthalene Apr. 28, 1998
5453177 Integrated distillate recovery process Sep. 26, 1995
5254769 Method of isomerization of dimethylnaphthalenes Oct. 19, 1993
5243113 Process for preparing 2-methylnaphthalene Sep. 7, 1993
4783568 Xylene producing process having staged catalytic conversion of ethylbenzene Nov. 8, 1988
4697039 Xylene producing process having staged catalytic conversion of ethylbenzene Sep. 29, 1987
4670618 Process for improved recovery of paraxylene Jun. 2, 1987
4642406 High severity process for xylene production employing a transalkylation zone for xylene isomerization Feb. 10, 1987
4376223 Method for promoting aluminum chloride catalyzed isomerization of sym octahydrophenanthrene to sym-octahydroanthracene with aryl phenone Mar. 8, 1983
4162214 Method of preparing benzene and xylenes Jul. 24, 1979
4159284 Process for separation of hydrocarbon mixture Jun. 26, 1979
4139571 C.sub.8 Alkyl aromatic hydrocarbon isomerization by recycling benzene and toluene Feb. 13, 1979

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