Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1994-01-21
1995-10-31
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 24, 423DIG17, C22B 1500
Patent
active
054627206
ABSTRACT:
Process for biolixiviating minerals from copper sulfides and also from their flotation concentrates, characterized by the use of biolixiviation through indirect contact as well as separation and improvement of the chemical and biological steps of the biolixiviation process. In the chemical step, a low concentration of ferric sulfate is used as the lixiviating agent. In the biological step, bacterial films of Thiobacillus ferrooxidans attached to an inert solid are used to regenerate the lixiviating agent by converting the ferrous ion into ferric ion through oxidation. The regenerated agent is then recycled to the lixiviation reactor. The biolixiviation process permits complete extraction of the copper contained in the ore and results in a lixiviation liquor which contains all the copper charge and a low concentration of ferric sulfate similar to the low concentration of ferric sulfate used initially. The copper obtained can be treated without difficulty by means of extraction with solvents and electrolysis in order to obtain cathode copper.
REFERENCES:
patent: 2829964 (1958-04-01), Zimmerley et al.
patent: 3218252 (1965-11-01), Glover et al.
patent: 3856913 (1974-12-01), McElroy et al.
patent: 4269699 (1981-05-01), McCready et al.
patent: 4732608 (1988-03-01), Emmett, Jr. et al.
patent: 4752332 (1988-06-01), Wu et al.
patent: 4931262 (1990-06-01), Sonta et al.
Bos Steven
Iskay Serviceis Metalurgicos Srl.
Skillman Henry H.
LandOfFree
Process for biolixiviating copper sulfides by indirect contact w does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for biolixiviating copper sulfides by indirect contact w, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for biolixiviating copper sulfides by indirect contact w will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1770548