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Class Information
Number: 585/819
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By membrane, selective septum, or coalescer > Aromatic permeate
Description: Subject matter wherein an aromatic component of the hydrocarbon mixture passes through the membrane or septum.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8580111 Device for separating fuel components Nov. 12, 2013
8568510 Gas-separation processes using membranes with permeate sweep to recover reaction feedstocks Oct. 29, 2013
8258363 Separation of aromatics with pervaporation membrane Sep. 4, 2012
8177965 Enhancement of saturates content in heavy hydrocarbons utilizing ultrafiltration May. 15, 2012
8114192 Gas separation processes using membrane with permeate sweep to recover reaction feedstocks Feb. 14, 2012
7812207 Membrane separation processes and systems for enhanced permeant recovery Oct. 12, 2010
7803275 Membrane separation process using mixed vapor-liquid feed Sep. 28, 2010
7642393 Process for removing at least benzene from hydrocarbon streams Jan. 5, 2010
7612246 Process for isomerization of a C7 fraction with co-production of an aromatic molecule-rich fraction Nov. 3, 2009
7497896 Method of treating a gas mixture comprising propane and propylene Mar. 3, 2009
7452405 Multi stage sulfur removal system and process for an auxiliary fuel system Nov. 18, 2008
7423192 Process and system for blending components obtained from a stream Sep. 9, 2008
7381858 Xylene process using perm-selective separations Jun. 3, 2008
7358414 Para-xylene process using perm-selective separations Apr. 15, 2008
7267761 Method of reducing sulfur in hydrocarbon feedstock using a membrane separation zone Sep. 11, 2007
6972093 Onboard fuel separation apparatus for an automobile Dec. 6, 2005
6649061 Membrane process for separating sulfur compounds from FCC light naphtha Nov. 18, 2003
6649062 Fluid-membrane separation Nov. 18, 2003
6646177 Method for separation of p-xylene Nov. 11, 2003
6525236 Membrane-augmented manufacture of cumene Feb. 25, 2003
6376733 Process for production of paraxylene Apr. 23, 2002
6316684 Filled superglassy membrane Nov. 13, 2001
6187987 Recovery of aromatic hydrocarbons using lubricating oil conditioned membranes Feb. 13, 2001
6013852 Producing light olefins from a contaminated liquid hydrocarbon stream by means of thermal cracking Jan. 11, 2000
5914435 Process for reducing the benzene content in a hydrocarbon fraction Jun. 22, 1999
5905182 Process for the purification of benzene that comprises two permeation stages May. 18, 1999
5877385 Process including extractive distillation and/or dehydrogenation to produce styrene from petroleum feedstock including ethyl-benzene/xylene mixtures Mar. 2, 1999
5863420 Unsaturated hydrocarbon separation and recovery process Jan. 26, 1999
5849980 Low alkaline inverted in-situ crystallized zeolite membrane Dec. 15, 1998
5756643 Polymide copolymers containing polycarbonate soft segments May. 26, 1998
5651877 Lubricating oil dewaxing with membrane separation Jul. 29, 1997
5498823 Ion-exchange supports for facilitated transport membranes with enhanced selectivity Mar. 12, 1996
5494566 Lubricating oil dewaxing with membrane separation of cold solvent Feb. 27, 1996
5430224 Supercritical perstraction process Jul. 4, 1995
5416259 Feed pretreatment for pervaporation process May. 16, 1995
5396019 Fluorinated polyolefin membranes for aromatics/saturates separation Mar. 7, 1995
5360530 Lubricating oil dewaxing using membrane separation of cold solvent from dewaxed oil and recycle of cold solvent to filter feed Nov. 1, 1994
5358625 Lubricating oil dewaxing using membrane separation of cold solvent from dewaxed oil Oct. 25, 1994
5254795 Removal of 2-ring aromatics from low boiling streams containing low concentrations of same using membranes Oct. 19, 1993
5240591 Membrane process for separating a mixture containing dewaxed oil and dewaxing solvent Aug. 31, 1993
5234579 Membrane process for treating a charge containing dewaxing solvent and dewaxed oil Aug. 10, 1993
5180496 Unsaturated polyesters and crosslinked membranes therefrom for aromatics/saturates separation Jan. 19, 1993
5177296 Saturated polyesters and crosslinked membranes therefrom for aromatics/saturates separation Jan. 5, 1993
5159130 Polysulfone membranes for aromatics/saturates separation Oct. 27, 1992
5135547 Facilitated liquid membranes for olefin/paraffin gas separations and related process Aug. 4, 1992
5120900 Integrated solvent extraction/membrane extraction with retentate recycle for improved raffinate yield Jun. 9, 1992
5095171 Control of oxygen level in feed for improved aromatics/non-aromatics pervaporation (OP-3602) Mar. 10, 1992
5095170 Intergrated membrane pre-extraction/solvent extraction of distillates Mar. 10, 1992
5085778 Process for dehydration of organic oxygenates Feb. 4, 1992
5063186 Highly aromatic polyurea/urethane membranes and their use of the separation of aromatics from non-aromatics Nov. 5, 1991

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