Process for separating a resin phase from a solvent solution containing a solvent, demetallized oil and a resin
US5145574A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Feb 12, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for separating a resin phase from a solvent solution containing a solvent, demetallized oil and resin which process comprises: (a) passing the solvent solution over a portion of a generally vertically positioned heat-exchange surface thereby heating the solvent solution to precipitate a resin phase; (b) heating an upper portion of the vertically positioned heat-exchange surface with a circulating hot heat-exchange fluid; (c) passing at least a portion of the resin phase which is precipitated on the upper portion of the vertically positioned downwardly over a lower portion of the vertically positioned heat-exchange surface which lower portion is maintained at a lower temperature than the temperature of the upper portion; (d) recovering the solvent solution having a reduced concentration of resin; and (e) recovering a resin phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.