Process for catalyst recovery from hydrocyanation product...

Details Process for catalyst recovery from hydrocyanation product... Process for catalyst recovery from hydrocyanation product...

2005-08-30

2005-08-30

Drodge, Joseph (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S636000, C210S639000, C558S335000, C558S338000

Reexamination Certificate

active

06936171

ABSTRACT:
Disclosed herein is a process for recovering diphosphite-containing compounds from a mixture comprising diphosphite-containing compounds and organic dinitriles and Lewis acid, using liquid-liquid extraction, wherein the molar ratio of organic mononitrile present to organic dinitrile from about 0.01 to about 2.5 and wherein the mixtured is treated with a Lewis base compound selected from the group consisting of monodentate phosphite ligand, alcohol, water, organoamines, ammonia and basic resin, and wherein the extraction solvent is a saturated or unsaturated alkane or saturated or unsaturated cycloalkane; wherein the Lewis base compound is selected from the group consisting of water, methanol, ethanol, isopropanol, ethylene glycol, phenol, cresol, or xylenol. Also disclosed are pre-treatments to enhance extractability of the diphosphite-containing compounds.

REFERENCES:
patent: 3496215 (1970-02-01), Drinkard et al.
patent: 3496217 (1970-02-01), Drinkard, Jr. et al.
patent: 3496218 (1970-02-01), Drinkard, Jr. et al.
patent: 3766241 (1973-10-01), Drinkard, Jr.
patent: 3773609 (1973-11-01), Walter
patent: 5512695 (1996-04-01), Kreutzer et al.
patent: 5512696 (1996-04-01), Kreutzer et al.
patent: 5523453 (1996-06-01), Breikss
patent: 5543536 (1996-08-01), Tam
patent: 5663369 (1997-09-01), Kreutzer et al.
patent: 5688986 (1997-11-01), Tam et al.
patent: 5693843 (1997-12-01), Breikss et al.
patent: 5723641 (1998-03-01), Tam et al.
patent: 5847191 (1998-12-01), Bunel et al.
patent: 5959135 (1999-09-01), Garner et al.
patent: 6048996 (2000-04-01), Clarkson et al.
patent: 6120700 (2000-09-01), Foo et al.
patent: 6171996 (2001-01-01), Garner et al.
patent: 6171997 (2001-01-01), Foo et al.
patent: 6399534 (2002-06-01), Bunel et al.
patent: 6660876 (2003-12-01), Gagne et al.
patent: 0136429 (2000-05-01), None

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