Process for purification of aqueous solutions containing hydroge

Details Process for purification of aqueous solutions containing hydroge Process for purification of aqueous solutions containing hydroge

1991-12-18

1993-08-17

Wyse, Thomas

Distillation: processes, separatory

Water purification only

203 34, 203 35, 203 36, 203 37, 203 71, 210750, 210903, 210904, C02F 104

Patent

active

052365573

ABSTRACT:
Aqueous solutions which are contaminated by hydrogen sulfide, hydrogen cyanide, and ammonia are brought to a pH of about 3 or less after their formation and treated with an inert gas in a stripping column to remove the sulfide and cyanide. The pH of the solution is then increased to about 10 or more and the solution is again treated with an inert gas in a second stripping column to remove the ammonia.

REFERENCES:
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patent: 4160725 (1979-07-01), Josis et al.
patent: 4260462 (1981-04-01), Didycz et al.
patent: 4323430 (1986-04-01), Glassman et al.
patent: 4396463 (1983-08-01), Josis et al.
patent: 4594131 (1986-06-01), Maier
patent: 4853002 (1989-08-01), Niedwiecki et al.

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