Methods for the production of pulp and hemicellulose
US10787766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2019 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | May 7, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H11/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In alternative embodiments, provided are methods and industrial processes for generating pulp from lignocellulosic feedstocks, comprising directly contacting a lignocellulosic feedstock with a system comprising a super critical or sub-super critical fluid or mixture of fluids, whereby the partial pressure of the system provides for the hydrolysis or a combination thereof of the feedstock at reduced temperatures and pressures, followed by an upgrading step wherein a low-purity cellulosic material generated in the super critical or sub-super critical reaction step is treated with an alkaline solution. In alternative embodiments, provided are systems and methods for producing a cellulose material using reduced amounts of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.