Sulfur dioxide from by-product ammonium sulfate solutions

Details Sulfur dioxide from by-product ammonium sulfate solutions Sulfur dioxide from by-product ammonium sulfate solutions

1973-01-15

1976-03-16

Vertiz, Oscar R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423539, C01B 1760, C01B 1750

Patent

active

039446573

ABSTRACT:
In a process of concentrating an aqueous solution of ammonium sulfate and burning resultant concentrate at 850.degree.-1250.degree.C to form a combustion gas containing SO.sub.2, the improvement which comprises:
Conducting said concentrating by passing said combustion gas in direct contact with said aqueous solution of ammonium sulfate to evaporate water from said solution. If the concentrate is a slurry, it can be sent in total to the combustion step or it can be centrifuged with a recycle of mother liquor to the concentrating step. The evaporation can also be conducted so that substantially dry ammonium sulfate is obtained.

REFERENCES:
patent: 2452517 (1948-10-01), Broughton
patent: 2862789 (1958-12-01), Burgress
patent: 2936215 (1960-05-01), Hochmuth
patent: 3047362 (1962-07-01), Smith
patent: 3359069 (1967-12-01), Furkert et al.
patent: 3439724 (1969-04-01), Mason
patent: 3645683 (1972-02-01), Isbell, Jr.
Olsen, John C., Unit Processes and Principles of Chemical Engineering, D. Van Nostrand Co., Inc. NY 1932 pp.1-3.

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