Highly microporous carbons and process of manufacture
US5965483A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1994 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Oct 20, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for further chemical activation of activated carbon is disclosed comprising activation of an active carbon precursor material with a potassium hydroxide solution, pre-drying the blend to 5% to 15% moisture content, activating this blend at from about 650.degree. to about 1100.degree. C., and acid washing and drying the microporous activated carbon product, which is characterized by greater than 50% of its total pore volume comprising pores of from about 8.ANG. to 20.ANG. in width and greater than 70% of its total pore volume comprising pores of less than 20.ANG. in width and greater than 95% of its total pore volume comprising pores of less than 50.ANG. in width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.