Process for preparing a hydrolysed lingnocellulosic material
US5328562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1990 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | May 9, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C1/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An energy efficient process for hydrolyzing lignocellulosic materials which comprises using a primary system by providing a start-up energy input to operating saturated steam conditions and thereafter operating the primary system with substantially constant energy input, the condition of the hydrolysing saturated steam being controlled by water injection and/or steam bleeding from the primary system. The dwell time of the solids stream in the primary system is controlled by controlling its passage with flashing off of steam into a secondary system where drying occurs together with some small measure of hydrolysis in a lower pressure superheated steam environment, there being an energy input into the secondary system using steam bled from the primary system. The output solids material stream is preferably capable of being self polymerized into a formed shape eg a board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.