Activated carbon and preparation thereof
US4082661A · kind A · utility
13Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1975 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Jul 29, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1216
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Activated carbon filtration materials are obtained by impregnating phenolic resins into inorganic porous bodies, such as ceramic filter tubes and plates, then baking the impregnated bodies to carbonize the resins. The invention also includes improved methods for purifying aqueous liquids contaminated with phenol, live bacilli, pyrogens, or water soluble organic dyes and a process for regenerating spent filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.