Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1980-08-23
1981-11-03
Cooper, Jack
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
423341, 423483, 423484, 423490, 423551, C01B 3312, C01B 722, C01D 302
Patent
active
042985862
ABSTRACT:
Hydrofluoric acid is recovered from fluosilicic acid by reacting fluosilicic acid with sodium sulfate to form sodium fluosilicate. The sodium fluosilicate is reacted with a sodium-containing compound to form an alkaline aqueous slurry comprising silica and dissolved sodium fluoride. The reaction occurs under such conditions that the slurry contains precipitated amorphous silica. The precipitated amorphous silica is separated from the alkaline aqueous slurry leaving an aqueous solution of sodium fluoride. Sodium fluoride is recovered from the aqueous solution and reacted with sulfuric acid to produce hydrogen fluoride.
REFERENCES:
patent: 1324030 (1919-12-01), Bowman
patent: 3061541 (1962-10-01), Henry
patent: 3278265 (1966-10-01), Quarles
patent: 3506394 (1970-04-01), Okamura et al.
patent: 3537817 (1970-11-01), Bachelard
patent: 3549317 (1970-12-01), Dorn et al.
patent: 3563699 (1971-02-01), Cuneo et al.
patent: 3689216 (1972-09-01), Brown
patent: 3755532 (1973-08-01), Harrison et al.
patent: 3878294 (1975-04-01), Schabacher et al.
patent: 3914398 (1975-10-01), Faust
Bisson Barry A.
Cooper Jack
Franks Robert A.
Grinnell John P.
Occidental Research Corp.
LandOfFree
Recovery of hydrofluoric acid from fluosilicic 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 Recovery of hydrofluoric acid from fluosilicic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of hydrofluoric acid from fluosilicic acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1064309