Process for digesting woodchips with a sultaine and a polyglycoside
US6740199B2 · kind B2 · utility
3Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2001 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jul 26, 2021 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C3/222
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process for digesting woodchips used in papermaking. The process employs digester additive, which comprises a sultaine or mixtures of a sultaine with a nonionic surfactant selected from the group consisting of (a) polyglycosides, (b) polyoxyalkylene glycols, and (c) mixtures thereof as digester additives. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of woodchips into pulp. The invention also relates to the digester additive compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.