Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1982-01-25
1983-11-15
Heller, Gregory A.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
423304, 423320, 423322, 423522, 423532, 423541R, 423483, 210712, 210915, C01F 100, C01F 510, C01B 2516
Patent
active
044155433
ABSTRACT:
This disclosure concerns a process for treating phospho-gypsum waste product from the wet process method of making phosphoric acid including the steps of water washing the phospho-gypsum to remove all but an acceptable level of fluorine before the phospho-gypsum is calcined. The process allows the use of high sulfur coal for the production of steam if desired for use in the overall process. The process also allows for production of SO.sub.3 from part of the phospho-gypsum in an electric furnace to enrich the SO.sub.2 stream for making sulfuric acid.
REFERENCES:
patent: 2202414 (1940-05-01), Barnes
patent: 2222740 (1940-11-01), Bornemawn et al.
patent: 2528103 (1950-10-01), Willson
patent: 2687946 (1954-08-01), Manning et al.
patent: 2687947 (1954-08-01), Manning et al.
patent: 3087790 (1963-04-01), Wheelock et al.
patent: 3260035 (1966-07-01), Wheelock et al.
patent: 3326633 (1967-06-01), Canothers et al.
patent: 3547581 (1970-12-01), Gauster et al.
patent: 3607036 (1971-09-01), Foecking et al.
patent: 3607045 (1971-09-01), Wheelock et al.
patent: 3870786 (1975-03-01), Kidde
patent: 4040853 (1977-08-01), Binder et al.
patent: 4059674 (1977-11-01), Lopker
patent: 4120989 (1978-07-01), Wheelock
"Sulfuric Acid from Anhydrite", I & EC, vol. 49, No. 8, Aug. 1957.
"Manufacture of Cement from Industrial Byproducts", Chemistry and Industry, Feb. 1971.
"Production of Sulphuric Acid and Cement from Phosphogypsum Using the SJ Process", Chemical Age of India, vol. 27, 1976.
"The Simultaneous Production of Yellow Phosphorous and Alumina Cement", Chemical Abstracts, 1964.
"Getting Rid of Phosphogypsum-II", Phosphorous and Potassium, No. 89, May/Jun. 1977.
Spigolon Silvio J.
Wilson, Sr. Eddie K.
LandOfFree
Process for treating phospho-gypsum waste product from wet-acid 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 treating phospho-gypsum waste product from wet-acid , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for treating phospho-gypsum waste product from wet-acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-159235