... etc.acetic acid in chemicals Process According to GB/1903_2008,by fermentation method, corn is fermentated into alchohol vapors.After ... reaction, we got acetaldehyde ,then it is further putified by re-distillation ,then got qualified acetic acid in chemicals.Specifications ... ,w/% 0.005maxFreezing point/°C 15.6minCrude scale/% 95minThe heavy metal(by Pb),w/% 0.0002maxArsenic(As),w/% 0.0001maxFree mineral ...