Methods of and apparatus for recovering a constituent of a proce

Details Methods of and apparatus for recovering a constituent of a proce Methods of and apparatus for recovering a constituent of a proce

1984-01-31

1986-03-25

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group va metal or arsenic

55228, 65 312, 210 961, 210196, 2102572, 210805, 210806, 261 3, 261 5, 261DIG46, 422 62, 422169, 423 92, C03B 37075

Patent

active

045782539

ABSTRACT:
The effluent of a process for making a preform from which an optical fiber is drawn is directed into a scrubber (40) of a loop (20) where it is treated with an aqueous solution to provide a solvent mixture which comprises particulates and a solvent solution including germanium. Subsequently, the solvent mixture is moved into a first filter system (55) which provides a filtrate free of particulates above a first size that is returned to the scrubber for reuse and a residue. Then the residue from the first filter system is moved into a second filter system (80) which provides a filtrate free of particulates larger than a second size that is smaller than the first size and a residue. The filtrate from the second filter system also is returned to the scrubber for reuse while the residue from the second filter system is recirculated therethrough. When the germanium concentration reaches a predetermined level, portions of the residue from the second filter system are withdrawn and subsequently treated with a precipitating agent to recover germanium.

REFERENCES:
patent: 3810544 (1974-05-01), Armstrong et al.
patent: 4217027 (1980-08-01), MacChesney et al.
patent: 4231777 (1980-11-01), Lynch et al.
patent: 4385915 (1983-05-01), Amelse et al.

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