Installation for implementing a method for producing paper pulp, lignins and sugars and production method using such an installation
US8157964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2006 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Jul 10, 2028 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C3/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention proposes an installation (10) in which the impregnation and fractionation of the raw material (MP) are conducted at atmospheric pressure, characterized in that it comprises means (18, 20) for transferring the raw material (MP) successively to a first treatment station (PT1) and a second treatment station (PT2), each comprising means (G1, G2) for temporarily combining, at the first station (PT1), the raw material (MP) with a quantity of a first mixture of organic acids and, at the second station (PT2), for temporarily combining the raw material (MP) with a quantity of a second mixture; and means, after impregnation, for at least partially recovering the quantity of second mixture after impregnation and for recycling at least a portion of the second recovered mixture to form at least partially said first impregnation mixture used at the first station (PT1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.