Method to reduce fuel vapor emissions
US5288307A · kind A · utility
28Cited by
32References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S95/90
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Hydrocarbon emissions from fuel reservoirs, particularly those associated with motor vehicles, are abated by contacting a vented hydrocarbon fuel vapor stream from the reservoirs with a polymeric adsorbent derived from a macroporous or macroreticular copolymer of at least one monovinylidene aromatic monomer and a crosslinking monomer. The macroporous copolymers are converted into suitable adsorbents by post-polymerization crosslinking in a swollen state in the presence of a Friedel-Crafts catalyst. The resulting adsorbent has improved hydrocarbon adsorption capacity relative to conventional activated carbon adsorbents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.