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Technical guidelines on used oil re-refining or other re-uses of previously used oil (R9)
… are synthesised using chemical processes in which basic carbon and hydrogen compounds are combined. Generally, they … Fatty oils Compressor oils Asphaltic oils Turbine oils Black oils Machine oils (non-fatty) Bunker oils Grinding oils … of the material by removing sludges and suspended matter, carbon and to varying degrees heavy metals. 27. Although much …