Method for preparing dissolving pulp by TCF bleaching of poplar KP
US11643777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2020 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Feb 22, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H13/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present application relates to a method for preparing dissolving pulp by TCF bleaching of poplar KP, including: preparing poplar KP by pre-hydrolysis kraft process with poplar as a raw material, and OZQP bleaching of the poplar KP to obtain dissolving pulp, wherein O denotes oxygen delignification, Z denotes ozone bleaching, Q denotes chelating treatment, and P denotes hydrogen peroxide bleaching. The dissolving pulp prepared by the same exhibits that all indexes can meet the requirements of excellent products in dissolving pulp industry standard (QB/T4898-2015), and most of the indexes are far superior to those of excellent products, and thus it can completely replace imported dissolving pulp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.