Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Including recovery of organic by-product
Patent
1988-09-19
1990-10-30
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Including recovery of organic by-product
162 16, 162 21, 162 60, 162 72, 162 77, 162 88, 162 89, 530500, 530507, D21B 136, D21C 318, D21C 320, D21C 326
Patent
active
049666509
ABSTRACT:
The chemical components of lignocellulosic material which have been dissociated by a steam explosion process can be extracted from the mixture of components using a solvent extraction process. The solvents are water, alcohol and a mild caustic in that order, or the alcohol step can be by-passed and only water and caustic are used. The caustic is a stronger solvent and it will extract the alcohol solubles along with the caustic only solubles. The eluant from the these extractions contains a range of lignin derived substances, which have different applications, such as thermoplastic and thermosetting characteristics. This invention describes a method for partitioning these lignin components into reproducible fractions having definable characteristics for particular applications. For instance, many copolymer applications require a thermosetting only fraction of the lignin. Other applications require a thermoplastic only lignin. The patent also describes a process for converting the thermoplastic lignin fraction to thermosetting lignin.
REFERENCES:
patent: 2752394 (1956-06-01), Sorensen
patent: 4453004 (1984-06-01), Nelson
patent: 4470851 (1984-09-01), Pazner et al.
DeLong Edward A.
Ritchie George S.
LandOfFree
Method for fractionation of lignins from steam exploded lignocel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for fractionation of lignins from steam exploded lignocel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for fractionation of lignins from steam exploded lignocel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-273551