270 Refining Used Lubricating Oils
Assignee: Mineralöl-Rafnerie Dollbergen GmbH, Uetze-Dollbergen,
Germany.
US 7,226,533, dated June 5, 2007.
Title: Process for Re-rening Used Oils by Solvent Extraction.
Inventor(s): Angulo Aramburu, J.
Assignee: Sener Grupo de Ingenieria, S.A., Madrid, Spain.
US 7,261,808, dated August 28, 2007.
Title: Upgrading of Pre-processed Used Oils.
Inventor(s): Grandvallet, P., Hagan, A.P. and Huve L.G.
Assignee: Shell Oil Company, Houston, Texas.
US 7,431,829, dated October 7, 2008.
Title: Method for Regenerating Used Oils by Demetallization and
Distillation.
Inventor(s): Angulo Aramburu, J.
Assignee: Sener Grupo de Ingenieria S.A., Madrid, Spain.
US 7,473,348 B2, dated January 6, 2009.
Title: Diesel Oil from Residues by Catalyt ...