1
Laura E Black, Robert C Schucker: Selective separation of multi-ring aromatic hydrocarbons from distillates by perstraction. Exxon Research and Engineering Company, Joseph J Allocca, October 9, 1990: US04962271 (19 worldwide citation)

Membrane separation under perstraction conditions of a lube oil distillate is disclosed which produces a retentate rich in non-aromatics hydrocarbons and alkyl aromatic and a permeate rich in multi-ring aromatics. The recovered retentate is similar to a solvent extracted raffinate but possesses a hi ...


2
Laura E Black, Peter G Miasek, Georges Adriaens: Aromatic solvent upgrading using membranes. Exxon Research and Engineering Co, Joseph J Allocca, July 30, 1985: US04532029 (15 worldwide citation)

The present invention is directed to a process for producing high quality aromatic solvents in the middle distillate range containing 95.sup.+ % aromatics by contacting the liquid feed with a perm selective membrane under pressure thereby selectively permeating the aromatic components as the high qu ...


3
Laura E Black, Heather A Boucher: Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes. Exxon Research and Engineering Co, Joseph J Allocca, February 18, 1986: US04571444 (13 worldwide citation)

In the production of alkylaromatics by the alkylation of aromatic hydrocarbons with alkylating agents such as olefins typically in the presence of a catalyst, the unconverted aromatic hydrocarbon remaining after completion of the alkylation process is separated from the alkylaromatic product and the ...


4
Laura E Black: Selective permeation of aromatic hydrocarbons through polyethylene glycol impregnated regenerated cellulose or cellulose acetate membranes. Exxon Research and Engineering Company, Joseph J Allocca, February 7, 1989: US04802987 (12 worldwide citation)

Aromatic hydrocarbons present in a hydrocarbon feed stream containing a mixture of aromatic hydrocarbons and non-aromatic saturated organic components are separated from said hydrocarbon feed stream by selective permeation of the aromatic hydrocarbon through a regenerated cellulose or cellulose acet ...


5
Laura E Black: Aromatics - non-armoatics separation by permeation through thermally crosslinked nitrile rubber membranes. Exxon Research and Engineering Company, Joseph J Allocca, December 5, 1989: US04885096 (9 worldwide citation)

Aromatic hydrocarbons are separated from mixtures of same with non-aromatics by permeation through a membrane of thermally crosslinked polyconjugated diene rubber containing from 15 to 50 wt % nitrile groups. Thermal crosslinking increases selectivity far beyond the level obtained when crosslinking ...


6
Mahmoud M Hafez, Laura E Black: Membrane separation of uncoverted carbon fiber precursors from flux solvent and/or anti-solvent. Exxon Research and Engineering Co, Joseph J Allocca, August 19, 1986: US04606903 (8 worldwide citation)

Flux solvents and/or pitch neomesophase anti-solvents used in the generation of carbon fiber precursors from pitch are separated from mixtures of such solvent and uncoverted carbon fiber precursors by contacting said mixtures with asymmetric hydrophobic membranes under conditions of reverse osmosis. ...


7
Laura E Black, Wan Kei Wan: Reverse osmosis cellulose and cellulosic membranes prepared by repeated drying and rewetting. Exxon Research and Engineering Company, Joseph J Allocca, August 15, 1989: US04857201 (7 worldwide citation)

The ability of cellulose membranes to separate solutes from solvents under reverse osmosis conditions is significantly improved by subjecting the membrane prior to use to several cycles of drying and rewetting.


8
Laura E Black: Interfacially polymerized membranes for the reverse osmosis separation of organic solvent solutions. Exxon Research and Engineering Company, Joseph J Allocca, December 22, 1992: US05173191 (5 worldwide citation)

Interfacially polymerized, crosslinked membranes on microporous, organic solvent resistant ultrafiltration membrane backing are useful for the separation of organic mixtures under reverse osmosis conditions. The membranes are prepared by depositing an aqueous (or conversely non-aqueous) solution of ...


9
Adrianus Welmers, Laura E Black: Solvent extraction process involving membrane separation of extract phase and/or intermediate zone phase with pseudo extract/pseudo raffinate recycle, preferably employing interfacially polymerized membranes. Exxon Research & Engineering Company, Joseph J Allocca, August 10, 1993: US05234597 (4 worldwide citation)

The solvent extraction of aromatics containing oil using a selective aromatics extraction solvent to produce an aromatics rich extract phase and an oil rich/aromatics lean raffinate is improved by the steps of subjecting the extract phase to a membrane separation step to produce a permeate phase and ...


10
Adrianus Welmers, Laura E Black: Solvent extraction process involving membrane separation of extract phase and/or intermediate zone phase. Exxon Research & Engineering Co, Joseph J Allocca, July 25, 1995: US05435918 (3 worldwide citation)

The solvent extraction of aromatics containing oil using a selective aromatics extraction solvent to produce an aromatics rich extract phase and an oil rich/aromatics lean raffinate is improved by the steps of subjecting the extract phase to a membrane separation step to produce a permeate phase and ...