VERFAHREN ZUR AUFBEREITUNG WAESSRIGER KIESELFLUORWASSERSTOFFSAEUREN

VERFAHREN ZUR AUFBEREITUNG WAESSRIGER KIESELFLUORWASSERSTOFFSAEUREN

Recovery of hydrofluoric acid from aqueous fluosilicic acid by treating said aqueous fluosilicic acid at a temperature of from 100 DEG to 300 DEG C. and under a pressure of from 3 to 80 atmospheres and separating resulting hydrogen fluoride containing aqueous phase and silicon tetrafluoride containi...

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Bibliographische Detailangaben
Hauptverfasser: WEISS,WOLFGANG,.DR, BECKER,WOLF,.DR
Format: Patent
Sprache:ger
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Zusammenfassung:Recovery of hydrofluoric acid from aqueous fluosilicic acid by treating said aqueous fluosilicic acid at a temperature of from 100 DEG to 300 DEG C. and under a pressure of from 3 to 80 atmospheres and separating resulting hydrogen fluoride containing aqueous phase and silicon tetrafluoride containing gaseous phase and optionally hydrolyzing the silicon tetrafluoride containing gaseous phase in aqueous medium and recycling the aqueous fluosilicic acid to the process as starting material.