Oxidation of white liquor using a packing column
US5439556A · kind A · utility
8Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1993 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Nov 1, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/0057
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of producing oxidized white liquor from white liquor in which sodium sulfide is oxidized to sodium sulfate. In accordance with the method, an oxygen containing gas is contacted with the white liquor at a temperature of at least 110.degree. C. and such that the total pressure of oxygen and water vapor is no less than 9.2 atmospheres during the contacting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.