Production of ammonium sulfate

Details Production of ammonium sulfate Production of ammonium sulfate

1977-08-15

1981-02-10

Carter, Herbert T.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423545, 423242, 423237, C01C 124, C01B 1700

Patent

active

042501601

ABSTRACT:
A process for the production of ammonium sulfate in a multistage contactor (or column) inclusive of liquid cyclone recycle. A gas, or gases, which contains sulfur dioxide, e.g., a flue gas, is contacted with ammonia in an oxygen and water environment in a column comprised of three sections (zones). Sulfur dioxide is contacted in vapor phase in a central section of the contactor with a stoichiometric excess of ammonia in the presence of oxygen and water vapor to produce ammonium sulfate. A scrubbing section for the removal of ammonia from the effluent gas by countercurrent contact with water or acid solution is provided in the upper section of the contactor. Liquid cyclones are utilized in the lower section of the contactor where product ammonium sulfate is removed as a slurry, crystalline ammonium sulfate is removed from the slurry, and liquid is returned as recycle to the contactor.

REFERENCES:
patent: 1508736 (1924-09-01), West et al.
patent: 1931408 (1933-10-01), Hodsman et al.
patent: 1934573 (1933-11-01), Van Peske
patent: 1986889 (1935-01-01), Fulton
patent: 1986899 (1935-01-01), Sperr, Jr.
patent: 1992681 (1935-02-01), Von Girsewald
patent: 2095074 (1937-10-01), Muus

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