Process for recycling a circular hydrocarbon from a used high performance lubricant

A process for recycling hydrocarbons in a used wind turbine gear oil comprising a hydrocarbon and a contaminate, the process comprising the steps of:

• a) contacting, via counter-current contact, the used wind turbine gear oil with a liquid phase;
• b) extracting, via liquid-liquid extraction, the contaminate from the used wind turbine gear oil into an extract phase;
• c) repeat steps a) and b) at least three times to remove the contaminate from the used wind turbine gear oil;
• d) separating the extract phase and a raffinate phase;
• e) separating the liquid phase from the raffinate phase to form a circular hydrocarbon;
• and
• f) blending the circular hydrocarbon with one or more base stocks to provide a high performance lubricant.