Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1981-05-04
1983-02-08
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 40, 162 65, 162 72, 162 76, 162 77, D21C 302, D21C 304
Patent
active
043728111
ABSTRACT:
A process is provided for the alkaline oxygen delignification and bleaching of chemical cellulose pulp while inhibiting degradation of carbohydrates in the pulp, due to the presence of one or more aromatic diamines, preferably having the diamine groups directly linked to an aromatic ring.
REFERENCES:
patent: 3759783 (1973-09-01), Samuelson et al.
patent: 4050981 (1977-09-01), Samuelson et al.
patent: 4089737 (1978-05-01), Nagano et al.
patent: 4091749 (1978-05-01), Procter et al.
patent: 4213821 (1980-07-01), Vanderhoek et al.
patent: 4248663 (1981-02-01), Kubes et al.
Kubes, "Sulfur-Free Delignification", TAPPI, vol. 61, No. 8, Aug. 1978, pp. 46-50.
Abrahamsson Kjell E.
Samuelson Hans O.
Alvo Steve
Mo och Domsjo Aktiebolag
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