... base oil.This technology is different from the traditional distillation process with sulfuric acid,it is also different from the ... in chemical treatment tank, then it is sent to distillation kettle to have it circulated and heated, while ... system:catalyzing treatment tank,blender,vacuum system;3,Distillation system:distillation tower,distillation kettle,circulation pump,heat exchanger;4,Cooling system ...