... a method of purifying lead containing oxides of nitrogen by wet process.

摘要

Wet-route process for the purification of fumes containing nitrogen oxides, in which nitrogen monoxide is oxidised by an oxidising agent to a nitrogen dioxide which is itself reduced to nitrogen by employing the reducing properties of sulphur dioxide which is very often present in the fumes, the said reduction being performed with the aid of an intermediary agent and its purpose being not to transfer the nitrogen oxides in the form of nitrates to the effluent from the purification process. …IMAGE…