Title:
METHOD OF REMOVING SULFUR DIOXIDE AND OTHER POLLUTANT FROM WASTE HEAT GAS CURRENT AND RECOVERING AMMONIUM SULFATE AS ITS BYYPRODUCT
Document Type and Number:
Japanese Patent JPS55147135
Kind Code:
A
Abstract:
A process for the removal of sulfur dioxide and other contaminants and the recovery of ammonium sulfate as a by-product from a hot waste gas stream comprising cooling the waste gas stream to a temperature below 120 DEG F., passing said waste gas stream in sequence through at least two separate absorption zones utilizing as an absorbent a recirculated aqueous salt solution of ammonium sulfite-bisulfite, withdrawing and oxidizing a portion of said aqueous ammonium sulfite-bisulfite salt solution under pressures and temperatures sufficient to substantially convert the salts to sulfate salts, and recycling the ammonia and sulfur dioxide vapors liberated during oxidation to the first absorption zone.
Inventors:
KURUTO FURIIDORITSUHI KAUPISHI
DAGURASU UIRIAMU BENETSUTO
RAFUAERU KATSUEN
DAGURASU UIRIAMU BENETSUTO
RAFUAERU KATSUEN
Application Number:
JP2677680A
Publication Date:
November 15, 1980
Filing Date:
March 05, 1980
Export Citation:
Assignee:
ITT
International Classes:
B01D53/50; B01D53/77; C01C1/22; C01C1/24; C01C1/242; (IPC1-7): B01D53/34; C01C1/246
Domestic Patent References:
| JPS5146575A | 1976-04-21 | |||
| JPS527870A | 1977-01-21 |
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