Method for directly recovering fluorine from gas streams

Patent · Thu Jan 01 00:00:00 EST 1981

OSTI ID:864011

Orlett, Michael J ^[1]; Saraceno, Anthony J ^[2]

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1. Portsmouth, OH
2. Waverly, OH

This invention is a process for the direct recovery of gaseous fluorine from waste-gas streams or the like. The process comprises passing the gas stream through a bed of anhydrous K.sub.3 NiF.sub.6 pellets to fluorinate the same to K.sub.3 NiF.sub.7 and subsequently desorbing the fluorine by heating the K.sub.3 NiF.sub.7 pellets to a temperature re-converting them to K.sub.3 NiF.sub.6. The efficiency of the fluorine-absorption step is maximized by operating in a selected and conveniently low temperature. The desorbed fluorine is highly pure and is at a pressure of several atmospheres. Preferably, the K.sub.3 NiF.sub.6 pellets are prepared by a method including the steps of forming agglomerates of hydrated K.sub.3 NiF.sub.5, sintering the agglomerates to form K.sub.3 NiF.sub.5 pellets of enhanced reactivity with respect to fluorine, and fluorinating the sintered pellets to K.sub.3 NiF.sub.6.

• Research Organization: Goodyear Atomic Corp., Piketon, OH (USA)
• DOE Contract Number: EY-76-C-05-0001
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4292287
• OSTI ID: 864011
• Country of Publication: United States
• Language: English

Related Subjects

method
directly
recovering
fluorine
gas
streams
process
direct
recovery
gaseous
waste-gas
comprises
passing
stream
bed
anhydrous
nif
pellets
fluorinate
subsequently
desorbing
heating
temperature
re-converting
efficiency
fluorine-absorption
step
maximized
operating
selected
conveniently
desorbed
highly
pure
pressure
atmospheres
preferably
prepared
including
steps
forming
agglomerates
hydrated
sintering
form
enhanced
reactivity
respect
fluorinating
sintered
method including
gas stream
gas streams
process comprises
highly pure
gaseous fluorine
comprises passing
subsequently desorb
direct recovery
/423/264/