Process and apparatus for recovery of spent pulping liquors
US4303469A · kind A · utility
14Cited by
6References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1980 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Apr 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An integrated system, process and apparatus are provided for the efficient and effective recovery of spent pulping liquors, particularly kraft black liquor, whereby in an initial stage concentrated spent liquor is subjected to combustion in a reactor equipped with a plurality of particulate materials, at least one of which is of finer particle size than the other, preferably subjecting a portion of said particulate materials to at least one further treatment in a fluidized bed unit, and treating the inorganic solid combustion products in a reducing atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.