Process for manufacturing environmentally safe anti-freeze liquid

摘要

The invention concerns a process for manufacturing an environmentally safe, quickly acting snow and ice dissolving liquid chiefly composed of amide and nitrate compounds in aqueous medium by reactions in liquid state, connecting the said process with the manufacture of urea and ammonium-nitrate by blending the aqueous concentrates of these compounds in a ratio corresponding to the amide and nitrate concentration of the anti-skid liquid target-make, the water content of which is set by regulating the total water content of the aqueous concentrates, choosing in part the concentration of the nitric acid serving for the ammonium-nitrate manufacture and/or in part the degree of the concentrates' evaporation, whilst the anti-corrosive inhibitors are fed directly after the blending of the concentrates into the still warm liquid.