Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Patent
1986-01-06
1988-05-24
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
162 77, 162 90, D21C 320
Patent
active
047464011
ABSTRACT:
A process for the delignification of cellulosic materials, wherein a high-yield cellulose pulp and high-value by-product, such as reactive lignins of low molecular weight are produced, which comprises degassing lignocellulosic material, rapidly heating the lignocellulosic material in a liquor comprising water, an organic solvent and a buffer thereby maintaining a substantially neutral solvent extraction, such that said lignocellulosic material is cooked in the liquor as it is heated from a temperature of 150.degree. C. to a selected maximum temperature in the range of 200.degree. to 280.degree. C.; and rapidly cooling the mixture to a temperature less than 150.degree. C. The reaction is controlled to maximize reactive lignin solvation while suppressing cellulose degradation.
REFERENCES:
patent: 2037001 (1981-07-01), Aronovsky
patent: 4496426 (1985-01-01), Baumeister et al.
patent: 4520105 (1985-05-01), Sinner et al.
patent: 4597830 (1986-07-01), April et al.
Rydholm "Pulping Processes"; Int. Publishers, pp. 300-305, 1969.
Faass George S.
Muzzy John D.
Roberts Ronnie S.
Alvo Steve
Georgia Tech Research Corp.
LandOfFree
Process for extracting lignin from lignocellulosic material usin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for extracting lignin from lignocellulosic material usin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for extracting lignin from lignocellulosic material usin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1056894