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Class Information
Number: 585/821
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By contact with solid sorbent > With measuring, sensing, testing, or recycle of sorbate to same sorption zone
Description: Subject matter wherein a positive step of measuring, sensing, or testing a component or parameter of the feedstock, product or sorption zone is recited or in which material sorbed in the process and later desorbed from the sorbent is recycled to the sorption zone, generally to act as a reflux.

Patents under this class:

Patent Number Title Of Patent Date Issued
8637724 Process for the regeneration of a copper, zinc and zirconium oxide-comprising adsorption composition Jan. 28, 2014
8586816 Recycling flush streams in adsorption separation process for energy savings Nov. 19, 2013
8481798 Feedback and feedforward closed loop purity and recovery control Jul. 9, 2013
8431763 Separation method of aromatic compounds comprising simulated moving bed xylene mixture pre-treatment process and additional xylene isomerization process Apr. 30, 2013
8053621 Solvent treatment methods and polymerization processes employing the treatment methods Nov. 8, 2011
8013082 Processes for correlating UV-VIS spectra of norbornene compound to polymerization processes using the same, and related purification methods and compositions Sep. 6, 2011
7906088 Method of removing impurities from gas or liquid streams using copper oxide and halide salt Mar. 15, 2011
7795489 Method for obtaining 2,6-dimethylnaphthalene using isomerization and crystallization processes Sep. 14, 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
7388120 Removing carbon dioxide from an oxygenate to olefins reaction effluent Jun. 17, 2008
7332640 Light hydrocarbon separation using 8-member ring zeolites Feb. 19, 2008
7192526 Method of optimizing the operation of a xylene separation unit using simulated countercurrent Mar. 20, 2007
6903240 Process for manufacturing a silicoalumino-phosphate molecular sieve Jun. 7, 2005
6900366 Process for upgrading of Fischer-Tropsch products May. 31, 2005
6635171 Process for upgrading of Fischer-Tropsch products Oct. 21, 2003
6486375 Process for recovering hydrocarbons from inert gas-hydrocarbon vapor mixtures Nov. 26, 2002
6153808 Method for separating alkylnaphthalene Nov. 28, 2000
5912395 Raffinate line flush in simulated continuous moving bed adsorptive separation process Jun. 15, 1999
5902486 Method for controlling with precision a process for separating constituents of a mixture, in a simulated moving bed separation system May. 11, 1999
5750820 Multiple grade flush adsorption separation process May. 12, 1998
5470482 Control process for simulated moving bed para-xylene separation Nov. 28, 1995
5457260 Control process for simulated moving adsorbent bed separations Oct. 10, 1995
5177225 Process for the production of alkylene oxide Jan. 5, 1993
5171923 Recycle for process for purification of linear paraffins Dec. 15, 1992
5109139 Process control of process for purification of linear paraffins Apr. 28, 1992
5055634 Adsorption and isomerization of normal and mono-methyl paraffins Oct. 8, 1991
5055633 Adsorption and isomerization of normal and mono-methyl paraffins Oct. 8, 1991
5043525 Paraffin isomerization and liquid phase adsorptive product separation Aug. 27, 1991
4956521 Adsorption and isomerization of normal and mono-methyl paraffins Sep. 11, 1990
4855529 Isomerization process with preliminary normal paraffin and mono-methyl paraffin feed capture step Aug. 8, 1989
4769047 Process for the production of ethylene oxide Sep. 6, 1988
4529415 Gaseous separation apparatus and process Jul. 16, 1985
4498910 Safe adsorption process for the separation of hydrocarbons from oxygen containing gas Feb. 12, 1985
4478723 Adsorptive separation method Oct. 23, 1984
4354929 Process for separating normal paraffins from hydrocarbons mixtures Oct. 19, 1982
4350583 Isobaric process for separating normal paraffins from hydrocarbon mixtures Sep. 21, 1982
4338477 Removal of catalyst residues from a gas Jul. 6, 1982
4232182 Process for purifying isoprene Nov. 4, 1980
4159284 Process for separation of hydrocarbon mixture Jun. 26, 1979
4139572 1-Alkyl-4-isopropylbenzene desorbents for para-xylene Feb. 13, 1979
3996306 Aromatic hydrocarbon isomer separation process Dec. 7, 1976
3992469 Effluent fractionation in simulated moving-bed adsorption processes Nov. 16, 1976

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