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Class Information
Number: 585/828
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By contact with solid sorbent > With specified sorbent rehabilitation procedure or agent, e.g., desorbent, etc. > Cyclic sorbate > Aromatic separated from other aromatic
Description: Subject matter in which a material retained by the sorbent in the sorption cycle is an aromatic compound and in which a material not retained by the sorbent in this cycle is also an aromatic compound.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8704031 Adsorptive process for separation of C.sub.8 aromatic hydrocarbons Apr. 22, 2014
8658848 Highly flexible process and apparatus for the simulated counter-current production of para-xylene Feb. 25, 2014
8641906 Method and system for distributing and collecting fluids in a multi-stage column Feb. 4, 2014
8609922 Energy conservation in heavy-hydrocarbon distillation Dec. 17, 2013
8609918 Method of producing para-substituted aromatic hydrocarbon Dec. 17, 2013
8609925 Adsorbents with improved mass transfer properties and their use in the adsorptive separation of para-xylene Dec. 17, 2013
8580120 Reduction in flushing volume in an adsorptive separation system Nov. 12, 2013
8569564 Separation system Oct. 29, 2013
8558049 Process and apparatus for para-xylene production using multiple adsorptive separation units and multiple adsorptive bed feed points Oct. 15, 2013
8529757 Parex unit feed Sep. 10, 2013
8530367 Agglomerated zeolitic adsorbents, their method of preparation and their uses Sep. 10, 2013
8502008 Process and apparatus for para-xylene production Aug. 6, 2013
8481798 Feedback and feedforward closed loop purity and recovery control Jul. 9, 2013
8431764 Para-xylene-separation with aluminosilicate X-type zeolite compositions with low LTA-type zeolite Apr. 30, 2013
8404918 Energy efficiency in adsorptive separation Mar. 26, 2013
8323581 Apparatus for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Dec. 4, 2012
8293963 Process for the crystallization separation of P-xylene Oct. 23, 2012
8198502 Process for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Jun. 12, 2012
8168845 Separation process May. 1, 2012
8123951 Process and apparatus for simulated moving bed separation comprising bypass lines in every other bed and with controlled flushing flow rates during injections and withdrawals Feb. 28, 2012
8123952 Process and device for simulated moving bed separation with a modulated by-pass fluid flow Feb. 28, 2012
8124825 Method of purifying 2,7-dimethylnaphthalene Feb. 28, 2012
8123950 Process and apparatus for simulated moving bed separation comprising bypass lines in every other bed and with a modulated bypass fluid flow rate Feb. 28, 2012
8071834 Adsorption process with on-line adsorbent removal Dec. 6, 2011
8049055 Process and device for separation in a simulated moving bed with a bypass fluid flow rate that is not regulated automatically Nov. 1, 2011
8030533 Method for combined production of paraxylene and benzene with improved productivity Oct. 4, 2011
8013202 Method for separating aromatic compounds using simulated moving bed operation Sep. 6, 2011
8008536 Simulated moving bed adsorptive separation process for handling multiple feedstocks Aug. 30, 2011
8003842 Hydrocarbon separation Aug. 23, 2011
7977526 Simulated countercurrent adsorptive separation process Jul. 12, 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
7928276 Process for producing high purity meta-xylene, comprising simulated moving bed adsorption and crystallization Apr. 19, 2011
7915471 Method for producing paraxylene comprising an adsortion step and two isomerization steps Mar. 29, 2011
7838714 Process and device for improved separation of metaxylene in a simulated moving bed Nov. 23, 2010
7838713 Process for separating para-xylene from a mixture of C8 and C9 aromatic hydrocarbons Nov. 23, 2010
7820869 Binderless adsorbents and their use in the adsorptive separation of para-xylene Oct. 26, 2010
7812208 Binderless adsorbents with improved mass transfer properties and their use in the adsorptive separation of para-xylene Oct. 12, 2010
7763767 Adsorption process with on-line adsorbent removal Jul. 27, 2010
7759534 Process and device for improved separation of paraxylene in a simulated moving bed Jul. 20, 2010
7728187 Adsorbent and process for the separation of meta-xylene from aromatic hydrocarbons Jun. 1, 2010
7718842 Process for separating meta-xylene from a feed of aromatic hydrocarbons by liquid phase adsorption using tetraline as a desorbant May. 18, 2010
7683233 Process for producing para-xylene Mar. 23, 2010
7649124 Simulated moving bed adsorptive separation process using a plurality of adsorption chambers in parallel and crystallizer and device used therein Jan. 19, 2010
7638677 Mixed matrix adsorbent for para-xylene separation Dec. 29, 2009
7635795 Simulated moving bed adsorptive separation process comprising preparation of feed by using single adsorption chamber and device used therein Dec. 22, 2009
7592499 Process for co-producing para-xylene and styrene Sep. 22, 2009
7576253 Method of separating dimethylnaphthalene isomers Aug. 18, 2009
7468468 Process for separating meta-xylene from a feed of aromatic hydrocarbons by liquid phase adsorption Dec. 23, 2008
7396973 Simulated moving bed adsorptive separation process for handling multiple feedstocks Jul. 8, 2008

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