SE311637

Carbon for the absorption of gases is obtained by heating acid coke at 800-1000 DEG C. The acid coke is obtained by carbonization at 300-500 DEG C. of the residue from the sulphuric acid treatment of hydrocarbon oils, e.g. in rotary drums, and may be moulded. The treated coke is activated by alternately passing SO2-laden air at room temperature, and N2 at 400 DEG C., and is then used for absorbing gaseous oxides from industrial gases, as in Specification 824,517.ALSO:Acid coke which has been heated at 800 -1000 DEG C is used as the absorption medium in the process of Specification 824,517, in which gaseous oxides are separated from industrial gases by contacting the gas and free oxygen with the absorption medium, which converts the oxides to a higher oxidation state for which the absorption medium has a higher absorption power, followed by desorption at 300 DEG C or above to effect reduction and removal of the oxides and cooling and recycling of the medium.