Dual surfactant digester additive composition and a method for enhancing the pulping of wood chips using the same
US11091875B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2017 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Jul 18, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In general, the present invention is directed to a method of cooking wood in a cooking liquor medium. The method comprises a step of providing wood to a treatment vessel and contacting the wood with a digester additive composition. The composition comprises a first surfactant comprising an anionic surfactant, a derivative thereof, a salt thereof, or any combination thereof and a second surfactant comprising a polyoxyalkylene glycol or a derivative thereof. Additionally, according to another embodiment, the present invention is directed to a digester additive composition comprising a first surfactant comprising an anionic surfactant, a derivative thereof, a salt thereof, or any combination thereof and a second surfactant comprising a polyoxyalkylene glycol or a derivative thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.