B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
165/1, 23/347, 2
B01D 53/34 (2006.01) C01B 17/16 (2006.01) C10K 1/10 (2006.01) C10K 1/12 (2006.01)
Patent
CA 1052537
ABSTRACT OF THE DISCLOSURE The invention relates to a process for the purification of cooled and deterred coke oven gas of the type wherein the said crude gas is passed through a washing circulation or flow to remove ammonia by washing with water, or water acidified with sulphuric acid, and to remove hydrogen sulphide by washing with an alkaline washing liquid, the improvement com- prising the use of a washing liquid, for the removal of hydrogen sulphide, containing sodium or potassium carbonate, removal of the hydrogen sulphide by the addition of caustic soda or caustic potash solution, corresponding amount of wash liquid being withdrawn from the circulation or flow. It is preferred to introduce the caustic soda or caustic potash before the hydro- gen sulphide washing and to remove the wash liquid before addition of the carbon dioxide. The carbon dioxide supplied for the hydrogen sulphide wash- ing step may be derived from the glue gases of the coke oven heating plant or from an ammonia separation plant. The invention also provides apparatus for use in the process of the invention, including gas washing devices con- structed as integrated components of the gas conduits.
221686
Gresch Heinz
Holter Heinz
LandOfFree
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