Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Including recovery of organic by-product
Patent
1984-07-27
1985-04-16
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Including recovery of organic by-product
127 37, 162 301, 162 72, 162 76, 162 77, C13K 102, D21C 302, D21C 320, D21C 1100
Patent
active
045114331
ABSTRACT:
A method for delignifying ligno-cellulosic materials and efficiently separate from each other the constituents thereof. Said materials are heated in an aqueous acid medium in the presence of phenol compounds. Then the reaction medium is drained and washed for isolating the purified solid cellulose pulp, the liquid phase separating into two layers: an aqueous layer rich with pentoses and an organic layer rich with phenols and lignin, the latter providing, by distillation and pyrolysis of the residue, a quantity of phenols at least equal to that of the phenols used in the delignification stage.
REFERENCES:
patent: 2024689 (1935-12-01), Groombridge
patent: 3522230 (1970-07-01), Buckart et al.
patent: 3776897 (1973-12-01), Ikari et al.
Wright et al. "Studies of Lignin and Related Compounds," Jan. 1937, pp. 125-130.
W. H. M. Schweers, "Phenol Pulping", Chemtech, Aug. 1974, pp. 491-494.
Vorher and Schweers, "Utilization of Phenol Lignin", Appl. Polymer Symposium No. 28, pp. 277-284 (1975).
Wayman and Lora, "Aspen Autohydrolysis", TAPPI/Jun. 1978, vol. 61, No. 6, pp. 55-57.
April, Kamal, Reddy, Bowers and Hansen, "Delignification with Aqueous-Organic Solvents", TAPPI/May 1979, vol. 62, No. 5, pp. 83-85.
Zoch, Harris and Springer, "Furfural from Spent Sodium-Base Acid Sulfite Pulping Liquor", TAPPI/Mar. 1969, vol. 52, No. 3, pp. 486-488.
Armanet Jean-Michel
Johansson Allan A.
Michel Jean-Pierre
Roman Alain
Sachetto Jean-Pierre
Alvo Steve
Battelle (Memorial Institute)
Warburton Kenneth R.
LandOfFree
Method for the simultaneous delignification of wood and other li 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 the simultaneous delignification of wood and other li, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the simultaneous delignification of wood and other li will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1454439