Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1977-06-30
1979-07-31
Vertiz, O. R.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
423 83, 423522, 423540, 423632, 423154, 423DIG2, C01B 1790, C01B 1750, C01G 2300, C01G 4902
Patent
active
041630475
ABSTRACT:
A process for the recovery of sulfuric acid from waste sulfuric acid containing iron sulfate and from solid iron sulfate of high water content of crystallization which consists essentially of:
A. concentrating waste sulfuric acid to an acid concentration of 25-55 weight percent, based upon the suspension, by removing water therefrom;
B. mixing the concentrated acid of Step A with recycled concentrated sulfuric acid obtained from Step E to form a resultant acid mixture of acid concentration of 30-65 weight percent, based upon the suspension;
C. adding said solid iron sulfate of high water content of crystallization to the acid mixture of Step B thereby obtaining iron sulfate of low water content of crystallization;
D. separating the iron sulfate of low water content from the resultant sulfuric acid solution of Step C;
E. concentrating the separated sulfuric acid solution of Step D to an acid concentration of 45-70 weight percent, based on salt-free acid, and recycling at least a portion thereof to Step B; and
F. thermally decomposing the iron sulfate from Step D to produce iron oxide and sulfur dioxide.
REFERENCES:
patent: 2098056 (1937-11-01), McBerty
patent: 2184419 (1939-12-01), Fowler et al.
patent: 2185095 (1939-12-01), Smith et al.
patent: 2202414 (1940-05-01), Barnes et al.
patent: 2960391 (1960-11-01), Sweet et al.
Daradimos Georg
Dorr Karl-Heinz
Gerken Rudolf
Grimm Hugo
Mucke Christoph
Bayer Aktiengesellschaft
Metallgesellschaft Aktiengesellschaft
Straub Gary P.
Vertiz O. R.
LandOfFree
Process for producing sulfuric acid from waste acid and iron sul 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 producing sulfuric acid from waste acid and iron sul, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing sulfuric acid from waste acid and iron sul will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-23248