Patent ID: 8999147
Filing Date: 2015-04-07
Classification: B01D,C09K,C10G,C10L

Abstract:
1. A process to stabilize and to remove contaminants from unstable oil, the process comprising the following steps of: a) intimately contacting a stream of the unstable oil with an initial solvent having a dipole moment ranging from 1.37 to 3.6 and 3.81 to 4.98 debyes to obtain two mixtures, a first mixture being of an oil-solvent type, which comprises treated oil, solvent, and impurities, and a second mixture being of a solvent-oil type, which comprises treated oil, solvent, residues, and impurities; b) separating the treated oil, present in the first mixture obtained in step a), from the solvent, leaving most of the impurities in the solvent phase; c) separating the solvent and the treated oil, present in the second mixture obtained in step a), from the residues; and d) recycling, in the process, one or more solvents with impurities, recovered in steps b) or c), and partially regenerated before being recycled to said process; wherein in step b) at least 98% of the impurities remain in the solvent phase; wherein in step d), at least one of each of said solvent is regenerated, for at least 50% wt. but for less or equal to 83% wt. to obtain a regenerated solvent stream, before recycling; optionally, wherein the treated oil recovered from the first mixture is mixed with the treated oil recovered from the second mixture.