The diseases in Finland and Scandinavia

Purified coke oven gas, substantially free of hydrogen sulfide, is prepared by counter-currently contacting said gas with an absorbent ammonia solution in a multi-stage absorber, dividing the absorbent solution discharged from the absorber and feeding said solution to the top and middle of a stripping tower in a ratio of 0.05 to 1 by weight, where the solution is contacted with steam to remove the acidic gas from the absorbent solution.