Removal of hydrogenation catalyst from polymer solutions by contact with silicates
US5104972A · kind A · utility
9Cited by
9References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Nov 23, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is provided comprising the steps of contacting a Group VIII metal hydrogenation catalyst residue containing polymer solution with a silicate, and recovering a polymer solution comprising less than 5 ppm by weight, based on the solution, of the Group VIII metal. In a preferred embodiment, the silicate is calcium silicate, magnesium silicate or diatomaceous earth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.