Process for removing fluorine compounds and sulfur dioxide from

Details Process for removing fluorine compounds and sulfur dioxide from Process for removing fluorine compounds and sulfur dioxide from

1978-07-14

1979-11-13

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Halogenous component

423242, B01D 5334

Patent

active

041743750

ABSTRACT:
Exhaust gas, e.g. from a metallurgical process, containing SO.sub.2 and HF is acid scrubbed to remove most of the F compounds and is then base scrubbed to remove most of the SO.sub.2 and remaining compounds. The recycled acid absorbent is mixed with part of the recovered basic absorbent. Another part of the basic absorbent is regenerated by the addition of Ca(OH).sub.2 and the regenerated basic absorbent is softened with F-containing absorbent from the acid-scrubbing stage.

REFERENCES:
patent: 3709978 (1973-01-01), Predikant
patent: 3919392 (1975-11-01), Teller

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