Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus acids or salts thereof
Patent
1998-12-08
2000-02-08
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus acids or salts thereof
4236585, C07F 928, C07F 930, C07F 938
Patent
active
060229918
ABSTRACT:
This is a method of regenerating dithiophosphorus acids from disulfides containing sulfur--sulfur bonds, formed by oxidation of dithiophosphorus acids, such as sulfur--sulfur bonding of dithiophosphoric, dithiophosphonic and dithiophosphinic acids, in a solvent extraction organic phase in which the dithiophosphorus acid is dissolved in a diluent. This process reacts metal directly with the organic solution containing the disulfide to produce a metal loaded complex form of the regenerated dithiophosphorus extractant in the organic solution. This metal complex forms by direct reaction of the metal with the disulfides without requiring the presence or the formation of nascent or gaseous hydrogen. The organic solution containing the regenerated dithiophosphorus extractant can be either directly recycled into a solvent extraction circuit or recycled after the loaded metal is stripped.
REFERENCES:
patent: 5447552 (1995-09-01), Mihaylov et al.
patent: 5759512 (1998-06-01), Rickelton et al.
Patai, "The Formation and Conversion of Disulphides to Thiols," The chemistry of the thiol group (1974) pp. 220-229.
Advanced Organic Chemistry; Third Edition; J. Wiley & Sons p. 1110. (1985).
Denger et al., Synthesis, Properties and Structure of Bisldialkyldithiophoshinato) manganese (II) Complexes, Inorganica Chimica Acta (1987) pp. 213-215.
Colton Dennis Frederick
Duterque Jean Paul
Okita Yoshiaki
Perraud Jean-Jacques Robert
Biederman Blake T.
Compagnie des Mines de Xere (CMX)
Cytec Technology Corp.
Geist Gary
Steen Edward A.
LandOfFree
Hydrogen-free regeneration of dithiophosphorus metal extractants does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrogen-free regeneration of dithiophosphorus metal extractants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrogen-free regeneration of dithiophosphorus metal extractants will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1682410