Apparatus and continuous method for the multistage treatment of finely divided solid substances with gases
US4698913A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Sep 24, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A continuous process for the successive treatment of finely divided solid materials which are fluidizable at low gas velocities wherein at least two different gases or gas mixtures are utilized and wherein the fluidized bed is held at a constant level in a countercurrent system. The individual gaseous treating materials are conveyed to the different zones of the treatment reactor whereby the cross-section in each zone is chosen so that an essentially constant linear stream velocity of the gas over the total length of treatment is attained whereby the length of the individual successive zones is determined so that in each zone the desired treatment process which is intended to be carried out runs through its desired course.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.