Home / Literatures When coolant enters waste lubricating oil, it will change the composition of the raw materials and the subsequent processing requirements. Unlike pure water pollution, coolant usually also contains ethylene glycol or propylene glycol, corrosion inhibitors, salts, and other additives. This does not mean that waste oil cannot be recycled. The actual processing…
Home / Literatures Yes, in many cases, high-sulfur waste oil can still be re-refined. However, for high-sulfur raw materials, more effective pre-treatment and residue separation measures need to be taken before and during the refining process. High sulfur content usually indicates a higher concentration of inorganic contaminants, metals, additive residues, sludge, and other solid substances….
Home / Literatures A commercial waste oil recycling plant does not make money simply because it has efficient refining equipment. It needs a reliable flow of suitable feedstock to keep the plant operating at a high utilization rate. For investors and plant operators, this creates a fundamental procurement question: Where can enough waste oil be sourced…
Home / Literatures The refined base oil may not have a strong odor. If the final product still has a noticeable smell, it is usually related to the original waste oil condition, residual volatile impurities, or insufficient refining and post-processing. By adopting an appropriate refining process, the odor of the final product can usually be significantly…
Home / Literatures During the re-refining process of waste oil, the yield of base oil is often lower than expected. Besides the equipment performance, the actual recovery rate is also affected by the quality of raw materials, moisture, light components, heavy pollutants, vacuum conditions and refining losses. Before replacing the equipment or increasing the operating…
Home / Literatures Dark color is a common quality issue for refined base oils, but it does not necessarily indicate a failure in the distillation process. The final color is influenced by the raw material condition, residual impurities, thermal conditions, and the downstream purification effect. Identifying the source of the color is the first step…
Home / Literatures Waste engine oil should not be sent directly into a recycling or re-refining system without first being characterized. Used engine oil can contain water, fuel, soot, wear metals, degraded additives, sediment, chlorine-containing contaminants, and other substances that significantly affect pretreatment requirements, distillation behavior, equipment loading, product yield, and final base oil quality….
Home / Literatures In the waste oil distillation plant, a stable vacuum pressure is crucial for maintaining continuous evaporation and separation. Vacuum fluctuations can alter the boiling conditions, thereby affecting product quality, energy consumption, and recovery efficiency. For medium-sized and large-scale plants, vacuum instability is usually not caused by a single component, but may be…
Home / Literatures Used engine oil is not simply a waste product. A significant portion of it consists of valuable lubricating hydrocarbons that can be recovered and converted into re-refined base oil. However, the amount of base oil obtained from one ton of used engine oil varies considerably depending on feedstock quality, contamination levels, process configuration,…
Home / Literatures During the waste oil distillation process, the presence of a small amount of residue is a normal phenomenon. Heavy hydrocarbons, ash, metals, degraded additives, and other substances that cannot be distilled will remain at the bottom of the distillation column. However, if the sludge or residue produced by the waste oil distillation plant significantly…
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