Catalyst and process for the preparation of tri-substituted silylalkynes
US4835229A · kind A · utility
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11Claims
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Key dates
| Filing date | Apr 29, 1988 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Polymeric tri-substituted silylalkynes useful for forming gas separation membranes are prepared at accelerated polymerization rates and increased molecular weights by employing at polymerization temperatures a binary catalyst system of Group VB or VIB metal halide such as TaCl.sub.5 and a tertiary amine compound such as pyridine in an aromatic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.