Process for recovering a transition metal compound
US8603933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2010 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Nov 11, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/65927
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present application aims to provide a process for producing a solid polymerization catalyst component, including the steps of (A) producing a solution with a transition metal compound and a solvent; (B) solidifying a component with the transition metal compound to produce the solid polymerization catalyst component in a solidification stage; (C) recovering from the solidification stage a liquid stream containing a minor amount of the transition metal compound dissolved therein and a solid catalyst stream; and (D) recovering the transition metal component from the liquid stream, characterized in that step (D) may include concentrating the solution to produce a first product stream including the solvent and being essentially free of the transition metal compound and a second product stream including the solvent and the transition metal compound, characterized in that the concentration is conducted within a temperature range of from 0 to 100 degrees Celsius.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.