Conversion of sulfur in blank liquor to eliminate odorous emissions and facilitate the collection of sulfate soaps
US4058433A · kind A · utility
9Cited by
34References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1975 |
| Grant date | Nov 15, 1977 |
| Priority date | — |
| Expiry date | Mar 6, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/928
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Oxidation and fixing of sulfur and sulfur compounds in weak black liquor is accomplished by methods which insure minimal odorous sulfur emissions and which facilitate the collection of sulfate soaps. By critical adjustment of certain parameters substantially complete oxidation of sulfur and sulfur compounds is achieved, with maximum utilization of oxygen, while enhancing the collection of sulfate soaps and minimizing the production of foam. Various methods are disclosed for the oxygenation of weak black liquor, including the utilization of reaction columns, conical reactors, and venturis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.