摘要:
Apparatus for treating spent hydrochloric acid from a galvanizing pickling bath wherein the spent acid is neutralized with ammonium hydroxide and aerated to form a solution of ammonium chloride with suspended iron oxides and hydroxides. The ammonium chloride solution, freed of the magnetite, is usable as a recycle material in the galvanizing process.
摘要:
A REACTION MASS IS PRODUCED BY IMPREGNATING A POROUS INERT SUPPORT WITH MAGNESIUM CHLORIDE AND ALKALI METAL CHLORIDE AS WELL AS COPPER CHLORIDE AS REACTION PROMOTER, SAID REACTION MASS IS CHLORINATED BY MEANS OF HYDROGEN CHLORIDE OR AMMONIUM CHLORIDE, AND THEN THE RESULTING CHLORINATED MASS IS OXIDIZED BY OXYGEN OR AIR TO GENEARATE CHLORINE, WHILE AT THE SAME TIME THE REACTION MASS REGENERATED BY THE OXIDATION IS RECYCLED TO SAID CHLORINATION STAGE.