Shaped wood-based active carbon
US4677086A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1984 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | May 18, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A shaped activated wood-based carbon with essentially no pore volume in pores greater than one micron in diameter and a higher apparent density is prepared from an active granular wood-based carbon with a significant pore volume in pores greater than one micron in diameter and a lower apparent density by the invention process of grinding the active granular wood-based carbon to a fine powder, mixing the ground carbon with a liquid selected from water or other polar molecule and a bentonite clay binder, shaping the mixture, drying the shaped active carbon to remove the liquid, and heat-treating the dried product to calcine, or fix, the clay binder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.