For Waste Motor Oil: Processing typically begins with settling and filtration to remove mechanical impurities. The batch distillation then separates the waste oil into base oil (heavy fraction) and fuel oil (light fraction). However, this method struggles to thoroughly remove sulfur, nitrogen, and heavy metals.

For Crude Oil: The process is suitable only for small-scale experiments or rudimentary oil refining in remote areas. It cannot achieve the efficient separation of multiple components that atmospheric-vacuum distillation provides.

Rough Product Fractions

• Separation precision is low, only roughly cutting components by boiling point into “light oil” (similar to gasoline), “heavy oil” (similar to diesel), and residue.
• Direct fire heating or jacket heating methods often lead to coking of materials at high temperatures, especially when processing high-viscosity waste oils.

Environmental and Safety Concerns

• Batch operations result in unorganized emissions of volatile organic compounds
• Small-scale facilities typically lack comprehensive environmental treatment systems