Apparatus for hydrolyzing and drying lignocellulosic material
US5454911A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1993 |
| Grant date | Oct 3, 1995 |
| Priority date | — |
| Expiry date | Oct 21, 2013 |
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 hydrolyzing 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 sustem 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.