Chemistry of inorganic compounds – Silicon or compound thereof – Halogen containing
Patent
1987-05-07
1988-08-09
Heller, Gregory A.
Chemistry of inorganic compounds
Silicon or compound thereof
Halogen containing
423320, 423321R, 423342, 423472, C01B 3308, C01B 2516, C01B 1100
Patent
active
047626984
ABSTRACT:
A method is disclosed for increasing the fluosilicic acid (FSA) recovered from a wet process phosphoric acid manufacturing process. The filtrate obtained by washing a filter cake is pumped to a stripper and reacted with H.sub.2 SO.sub.4 to converting the dissolved FSA to gaseous SiF.sub.4. A defoamer is added to the acid-filtrate mixture to reduce the foam produced by the reaction and increase the amount of gaseous SiF.sub.4 recovered from the reaction. The gaseous SiF.sub.4 is recovered from the acid-filtrate reaction mixture and converted to FSA for commercial use.
REFERENCES:
patent: 3271107 (1966-09-01), Nickerson et al.
patent: 3615195 (1971-10-01), Bierman et al.
patent: 3764658 (1973-10-01), Darwin et al.
patent: 4083936 (1978-04-01), Woodward
patent: 4298586 (1981-11-01), Sikdar
patent: 4308244 (1981-12-01), Sikdar et al.
patent: 4330517 (1982-05-01), Michalski
patent: 4540511 (1985-09-01), McCaffrey et al.
patent: 4613494 (1986-09-01), Barber
patent: 4626377 (1986-12-01), Kavchok et al.
Colton, F. A., J. Chem. Ed., 35(10), 562(1958).
Davidson Arthur F.
Kuhn Harry J.
Pflaum Craig A.
Yarnell J. Jay
Farquer Thomas L.
Guffey Wendell Ray
Heller Gregory A.
International Minerals & Chemical Corp.
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