Absorption of hydrogen fluoride

If the PVC content of the plastic waste is low, the hydrogen chloride produced can be absorbed either directly in the fluidized bed to which calcium oxide or magnesium oxide is added, or in a separately connected fluidized bed. This method has proved satisfactory, at least for the absorption of hydrogen fluoride in the pyrolysis of PTFE-containing plastic wastes and for hydrogen sulfide in the pyrolysis of rubber. 

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