Generally used oil recycling technology

 Generally Used Oil Recycling Technology
There are three processes to refine used lube oil to base oil in China.

Acid Process
Acid used oil recycling/reprocessing is old and popular.
Low Capital investment,very simple process.simple to operate, no advanced instruments, no skilled operators required.
Add sulfuric into waste oil, acid sludge and acid gas emission which adds heavy pollutants to the environment.
Now is banned by government  

Clay /flocculation and filtration process.
No acid is required.
Very high clay consumption, high chemical cost ,inconsistent quality.
may use water glass(Na2O.mSiO2 ,1%),TEPA(Tetraethylenepentamine)C8H23N5,1-2%) and activity clay(25%) 
Disposal of large quantity of spent clay is a environmental problem.
Process is dependent on a particular type of clay which may not be available from all the sources.
Regeneration rate is lower than 60% 
Vacuum Distillation Process
YANGJIANG Waste Lubricating Oil Recycling and purification system - vacuum distillation.
This is the most effective process for lube oil recycling 
Does not cause pollution.
Easy to operate
Sophisticated Equipments & Process,
Produces good quality Base Oils.
Low cost,chemcial cost is 30$ for recycling 1ton used oil 
High regeneration rate.more than 85%

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