Production of carbon from coal granules prepared in a fluid energy mill
US4102812A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1976 |
| Grant date | Jul 25, 1978 |
| Priority date | — |
| Expiry date | Sep 21, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/336
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Granular active carbon having satisfactory adsorbency and hardness characteristics and having a high proportion of its porosity in the below 2000 A range is produced from granules prepared from coal fluid energy milled until not more than 1% of the particles have diameters above 38 microns. The coal has a low ash and high carbon content and may have a British Standard Swelling number from 2 to 7 although it is preferred for the volatile matter content of the coal to be not more than 40% on a dry ash free basis. The granules may be produced by compacting milled particles having a temperature of from 50.degree. C to 250.degree. C between unheated pressure rolls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.