Electrolysis process for removal of caustic in hemicellulose caustic
US5667668A · kind A · utility
1Cited by
5References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 12, 1996 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Jul 12, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/0042
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Pulping chemicals and hemicellulose are recovered from a starting solution essentially free of lignin but containing a mixture of hemicellulose and caustic by electrolyzing this solution in the anolyte compartment of an electrolytic cell. By electrolysis, the concentration of caustic in the anolyte is decreased and the concentration of caustic in a catholyte of said cell is increased so as to allow recovery of about 60 to about 80 percent of the caustic present in the hemicellulose caustic starting solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.