System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process
US8057639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2009 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Apr 23, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P2201/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A system has been developed for pretreating cellulosic biomass feed stock including: a first pressurized reactor receiving the feed stock, wherein the feed stock undergoes hydrolysis in the first pressurized reactor; a sealing device having a first pressurized coupling to a feedstock discharge port of the first pressurized reactor, and a second pressurized coupling to a second pressurized reactor; a drain for a liquid including dissolved hemi-cellulosic material extracted from the feed stock in at least one of the first pressurized reactor and the sealing and extraction device; the second pressurized reactor assembly receiving the pressurized feed stock from the sealing device at a pressure substantially greater than the pressure in the first pressurized reactor, wherein cells of the feed stock are infused with water in the second pressurized reactor, and an expansion device downstream of the second pressurized reactor assembly, wherein the expansion device rapidly releases the pressure of the feed stock discharged from the second pressurized reactor such that the feed stock undergoes a steam explosion reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.