Process for forming a shaped porous fluorinated polymer catalyst and the resultant product
US4748190A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1985 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Dec 24, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/09
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is a process for making a high surface area, self-supporting catalyst suitable for use as an acid catalyst comprising: PA0 (a) at least partially polymerizing a perfluorinated monomer containing ion exchange groups convertible to an acid or salt form in a medium containing a gas-forming ingredient(s) which is present during polymerization and serves a polymerization enhancement purpose during polymerization; wherein the said gas-forming ingredient(s) is a material that will convert into a gaseous state and expand when heated; and PA0 (b) heating the polymer to a temperature sufficient to soften the polymer and sufficient to convert at least a portion of the gas-forming ingredient(s) into a gaseous state while the polymer is still in contact with at least a portion of the gas-forming ingredient(s), thereby converting the gas-forming ingredient(s) into a gas which expands the polymer and causes the formation of open and closed pores within the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.