HYDROCRACKING

Daxin Lubes products are manufactured from hydrocracked, group II and group III base oils.

What is Hydrocracking?

In the Hydrocracking process, the elimination of aromatics and polar compounds is achieved by chemically reacting the feedstock with hydrogen, in the presence of a catalyst, at high temperatures and pressures.

Several different reactions occur in this process, the principal ones being:

These reactions take place at temperatures as high as 400oC, pressures around 3000 psi and in the presence of a catalyst. The hydrocarbon molecules that are formed are very stable and this makes them ideal for use as lubricant base oils.

Hydrocracking results in base oils having the following attractive features:

These features give performance characteristics in finished lubricants very similar to synthetics.

What are the characteristics of hydrocracked oils?

COLOURHydrocracked base oils are clear and colourless
VISCOSITY INDEXHydrocracked base oils have higher VI's so they 'thin-out' less at high temperatures.
OXIDATION RESISTANCEHydrocracked base oils respond very well to anti-oxidants and so have superior resistance to oxidation and a longer lubricant life.
THERMAL STABILITYHydrocracked base oils have considerably better resistance to heat.
CARBON RESIDUEHydrocracked base oils produce lower residues.
DEMULSIBILITYHydrocracked oils separate easier from water.
LOW TOXICITYHydrocracked base oils have low toxicity, due to a virtual absence of impurities.
BIODEGRADABILITYHydrocracked base oils biodegrade faster than Solvent Refined oils - 60% vs 30%, as measured by the CEC-L33-A-93 test.

What are grouip II & group III base oils?

Group II base oils are manufactured by hydrocracking and solvent or catalytic dewaxing and hydro-finishing processes. Group II base oil has superior anti-oxidation properties since virtually all hydrocarbon molecules are saturated. They are water-white in colour.

Group III base oils have a greater viscosity index than group II which makes them more sheer stable.