Utilization of Acid Sludge

Abstract

We have investigated carbonization of the acid sludge on the utilization of carbonization products and detergency of sulfonate separated from the acid, sludge.When the acid sludge is heated slowly, SO₂ evolves at about 90°C, almost terminates up to about 350°C, and the lower saturated hydrocarbon evolves extremely above 500°C.The higher the carboni-zation temperature is, the more the sulfur content of carbonaceous material decreases.
The activities of carbon prepared from the acid sludge are satisfactory, when it is activated with steam for an hour, after heating at 850°C in the presence of sulfur.
From the comparison between surface tention, interfacial tention, penetrating, and foaming of Na-acid sludge sulfonate isolated from the acid sluuge and those of the commercial deter-gent, it will be considered the sulfonate is applicable as detergent, though its surface activities is lower than that of the commercial detergent.