Raffinate hydrocracking process for uv stable lubricating oils
Abstract
Abstract HIGH QUALITY UV STABLE LUBRICATING OIL STOCKS ARE PREPARED BY SOLVENT EXTRACTING A HYDROCARBON FEEDSTOCK WITH A SOLVENT HAVING PREFERENTIAL SOLUBILITY FOR AROMATICS, THEREBY REDUCING THE AROMATIC CONTENT THEREOF AND RECOVERING A RAFFINATE PHASE THEREFROM. THE RAFFINATE IS STRIPPED OF SOLVENT AND SUBSEQUENTLY HYDROCRACKED MILD CONDITIONS TO INCREASE THE VISCOSITY INDEX OF THE RAFFINATE. THE HYDROCRACKATE PRODUCT IS THEN SOLVENT EXTRACTED WITH A SOLVENT HAVING PREFERENTIAL SOLUBILITY FOR AROMATICS, WHICH SOLVENT MAY BE THE SAME OR DIFFERENT THAN THE SOLVENT USED IN THE FIRST EXTRACTION, THEREBY FORMING A SECOND EXTRACT PHASE AND A SECOND RAFFINATE PHASE. THE EXTACT AND RAFFINATE PHAESE ARE SEPARATED AND THE EXTRACT PHASE STRIPPED OF SOLVENT AND RECYCLED TO THE HYDROCRACKER .
Inventors
- 👤 H Henry
- 👤 J Gilbert
Bibliographic Details
Claims Analysis
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