Home / Literatures Selection of the appropriate refining technique is very critical for any used oil re-refining plant. It has a great influence on the quality of the product, operational cost, equipment needed and profitability. Two possible technologies are solvent extraction and hydrotreating. They both offer potential for improving the quality of re-refined base oil,…
We have seen in the last couple of years a significant change in the way base oil sourcing is considered both by the lubricant manufacturer and the industrial end-user. This emerging trend has become increasingly important with various factors coming together: the fluctuating price of crude oil feedstock, stringent environmental regulations, and ESG commitments.
Home / Literatures Used oil feedstock quality is one of the most important variables affecting the used oil base oil yield. The same amount of waste oil collected can yield varying amounts of re-refined base oil as the composition of the waste oil may contain different percentages of recoverable lubricating hydrocarbons, water, fuel dilution, sludge, solids,…
Home / Literatures Refining used/waste oil is not merely about separating impurities from used lubricating oil. Dark color, unpleasant odor, and color changes that occur during storage all affect the quality and market competitiveness of the regenerated base oil. These problems often have diverse causes and require different treatment methods. Adsorption can remove certain color-causing…
Home / Literatures The production capacity of an oil refinery is usually expressed in “barrels per day” (BPD), but the feed capacity of each unit varies. The crude distillation unit (CDU) is the foundation of the refinery’s capacity, while downstream units, crude properties, utilities, equipment limitations, and operating conditions jointly determine the actual crude processing volume…
Home / Literatures The quality of used oil feedstock directly affects re-refining efficiency, product consistency, residue generation, and operating cost. Before used lubricating oil enters a commercial re-refining plant, operators need clear feedstock specifications and acceptance criteria to determine whether each batch is suitable for processing. A used oil feedstock specification is not a universal pass/fail standard. Acceptable…
Home / Literatures The crude oil distillation unit (CDU) is one of the most energy-intensive units in a refinery. Heating the crude oil, separating the fractions, and maintaining the stability of the tower all require a significant amount of fuel and steam. Therefore, the CDU is also one of the main sources of energy consumption in…
Home / Literatures Choosing the right waste oil recycling process starts with the feedstock, not with a specific machine or refining technology. Used engine oil, hydraulic oil, gear oil, transmission oil and mixed industrial lubricants can behave differently during processing because their composition, contamination profile and consistency vary. For a commercial waste oil recycling plant, the…
Home / Literatures Choosing the right separation technology is critical when designing a waste oil recycling plant. Vacuum distillation and thin film evaporation can both separate valuable oil fractions from used lubricating oil, but they are designed for different processing requirements. Vacuum distillation is generally suited to bulk fractionation, while thin film evaporation offers greater control…
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…
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