Methods to enhance pulp bleaching and delignification
US7229525B2 · kind B2 · utility
0Cited by
10References
4Claims
0Family size
Assignee
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Key dates
| Filing date | May 3, 2005 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | May 3, 2025 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/147
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed.A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.