Chemistry: fertilizers – Processes and products – Inorganic material
Patent
1987-11-03
1988-12-20
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Inorganic material
71 25, 71 42, 71 43, 71 6401, 71 641, 71901, 423DIG2, C05D 900
Patent
active
047923490
ABSTRACT:
The present invention teaches a technique and provides for apparatus eminently useful for the econimic recovery of Fe, Zn, and S from waste galvinizer sulfuric acid and crystals of iron sulfate and zinc sulfate. The technique or method of the instant invention involves the ammoniation of the acid or a solution prepared from such crystals followed by the partial oxidation of the resulting ammoniated suspension to a point where the desired product magnetite is formed in the separated from a marketable solution of ammoniacal zinc sulfate. The effecting of the instant technique requires only a minimal amount of relatively inexpensive equipment and is simply and easily placed into practice by, for example, sparging anhydrous ammonia into a stirred tank of waste acid until the Ph is elevated to about 10. Air can be sparged through the resulting slurry to oxidize the iron in the acid. After a proper incubation period, the desired stable product, e.g., magnetite is desired, which product can thereafter be recovered in a gravity-type separator with the aid of magnetic flux enhancement. Both the heretofore mentioned solid product, magnetite, and liquid product of ammoniacal zinc sulfate are readily marketable items.
REFERENCES:
patent: 2741876 (1956-04-01), Paolini
patent: 3232738 (1966-02-01), Bahme
patent: 3871859 (1975-03-01), Jackson
Stumpe Louis A.
Trimm Joe R.
Lander Ferris H.
Petrusek Robert A.
Tennessee Valley Authority
LandOfFree
Fertilizer values from galvanizer waste does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fertilizer values from galvanizer waste, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fertilizer values from galvanizer waste will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1908109