System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process
US8512512B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2011 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Oct 25, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P2201/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method including: pretreating biomass feed stock in a first pressurized reactor, wherein the feed stock undergoes hydrolysis in the first pressurized reactor; discharging the feed stock from the first pressurized reactor to a pressurized sealing device having a first pressurized coupling to a feedstock discharge port of the first pressurized reactor; maintaining a vapor phase in the first pressurized reactor by injecting steam; washing the feed stock; draining dissolved hemi-cellulosic material extracted from the feed stock; discharging the feed stock from the pressurized sealing device through a second pressurized coupling to a second pressurized reactor; in the second pressurized reactor, infusing cells of the feed stock with steam or water vapor, and rapidly releasing the pressure applied to the feed stock to cause steam expansion in the cells of the feed stock and refine the feed stock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.