Pulping with an alkaline liquor containing a cyclic keto compoun

Details Pulping with an alkaline liquor containing a cyclic keto compoun Pulping with an alkaline liquor containing a cyclic keto compoun

1978-07-05

1981-02-03

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 90, D21C 302

Patent

active

042486637

ABSTRACT:
Lignocellulosic materials such as wood, bagasse, straw, reeds, and other plants and crops can be delignified effectively by a soda-type pulping with an alkaline liquor containing small quantities of both ethylenediamine or like amino compound, and a cyclic keto compound, such as anthraquinone. Pulping rates comparable to kraft are achieved and the pulps thereby obtained have excellent physical properties, especially tear strength.

REFERENCES:
patent: 4178861 (1979-12-01), Vanderhoek et al.
ABIPC, vol. 46, No. 6, 12/75, Abstract #5767.
Bach et al., Zellstofund Papier, (i) 3 (1972), p. 1-7.

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