Extractant for palladium and method for separation and...

Details Extractant for palladium and method for separation and... Extractant for palladium and method for separation and...

2005-02-23

2009-10-06

Mayes, Melvin C (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

Reexamination Certificate

active

07597863

ABSTRACT:
There is provided a novel extractant for palladium capable of improving an extraction speed in comparison with a case of utilizing a DHS being a conventional extractant, and a method for separation and recovery of palladium utilizing the same. The present invention provides a method for obtaining a palladium-containing aqueous solution by bringing an organic phase containing an extractant of a sulfur-containing diamide compound represented by the following structural formula (1):in which R1and R2each represent a group selected from a chain hydrocarbon group having 1 to 18 carbon atoms which may be branched, an alicyclic hydrocarbon group having 1 to 10 carbon atoms, and an aromatic hydrocarbon group having 1 to 14 carbon atom, and R3represents a group represented by {(CH2)nS(CH2)m}Lin which n, m and L each represent an integer of from 1 to 4; extracting palladium by the organic phase; and conducting a back-extraction of palladium, extracted by the organic phase, with an aqueous solution of hydrochloric acid containing thiourea.

REFERENCES:
patent: 4390366 (1983-06-01), Lea et al.
patent: 2002/0112569 (2002-08-01), Farone et al.
patent: 2003/0190274 (2003-10-01), Singh
patent: 63-14824 (1988-01-01), None
patent: 1-30896 (1989-06-01), None
patent: 3-22402 (1991-01-01), None
patent: 6-172882 (1994-06-01), None
patent: 7-310129 (1995-11-01), None
patent: 8-27527 (1996-01-01), None
patent: 8-158088 (1996-06-01), None
patent: 9-279264 (1997-10-01), None
patent: 10-102156 (1998-04-01), None
Hagermann, Justin et al, Designer Ligands, Jan. 1, 1999, Synthetic Communications, 29:2, 303-310.
Alizadeh, Naader; Liquid- liquid Extraction of Palladium from Hydrobromic Acid Meida by Hexadecylpyridium Bormide; Mar. 2002, The Japan Society for Analytical Chemistry, vol. 18.

Affiliated with

Also associated with

Rating

Extractant for palladium and method for separation and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Extractant for palladium and method for separation and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extractant for palladium and method for separation and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4055589