EP 0010451 A1 19800430 - Process for the delignification of lignocellulosic material and products thereof.
Title (en)
Process for the delignification of lignocellulosic material and products thereof.
Title (de)
Verfahren zur Delignifizierung eines Lignocellulosematerials und gewonnene Produkte.
Title (fr)
Procédé de délignification d'une matière lignocellulosique et produits obtenus.
Publication
Application
Priority
GB 7841856 A 19781025
Abstract (en)
There is disclosed a process for the delignification of lignocellulosic material by treatment with an alkaline liquor in the presence of a cyclic keto compound such as anthraquinone. The lignocellulosic material in subdivided form is first impregnated with the alkaline liquor containing a suitable amount of the cyclic keto compound whereafter any excess liquor is drained. The impregnated material is then cooked by heating. The delignified products are suitable for the manufacture of paper.
IPC 1-7
IPC 8 full level
D21C 3/00 (2006.01); D21C 1/00 (2006.01); D21C 3/22 (2006.01)
CPC (source: EP)
D21C 1/00 (2013.01); D21C 3/222 (2013.01)
Citation (search report)
- US 3215588 A 19651102 - KLEINERT THEODOR N
- US 4127439 A 19781128 - FUJII JOHN S, et al
- US 4036680 A 19770719 - HOLTON HARRY HUTCHINSON, et al
- CA 986662 A 19760406 - MAC MILLAN BLOEDEL LTD
Designated contracting state (EPC)
AT BE DE FR GB IT SE
DOCDB simple family (publication)
EP 0010451 A1 19800430; AU 5189879 A 19800501; AU 528368 B2 19830428; BR 7906873 A 19800603; CA 1132763 A 19821005; ES 485352 A1 19800701; FI 793317 A 19800426; JP S5562289 A 19800510; NO 793363 L 19800428; NZ 191815 A 19820223; PT 70365 A 19791101; ZA 795541 B 19801029
DOCDB simple family (application)
EP 79302316 A 19791024; AU 5189879 A 19791018; BR 7906873 A 19791024; CA 337139 A 19791005; ES 485352 A 19791025; FI 793317 A 19791024; JP 13709479 A 19791025; NO 793363 A 19791018; NZ 19181579 A 19791010; PT 7036579 A 19791024; ZA 795541 A 19791017