Process for deactivating Ziegler-Natta and metallocene catalysts
US5371053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | May 18, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for deactivating Ziegler-Natta and metallocene catalysts or catalyst systems "such systems are typically used for olefin polymerization". The process includes heating the active catalyst or catalyst system to a temperature sufficient to drive off volatile constituents, and to form complexes and compounds that are non-reactive or less reactive with ambient air than the active catalyst or catalyst system. The process includes steps for safe deactivation including scrubbing to substantially eliminate corrosive compounds, and burning volatile chemicals in a flare. This process essentially eliminates the production of hazardous classification waste from conventional water catalyst deactivation techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.