Alkaline pulping of lignocellulosic material with amine pretreat

Details Alkaline pulping of lignocellulosic material with amine pretreat Alkaline pulping of lignocellulosic material with amine pretreat

1976-10-20

1978-05-30

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Chemical treatment after start or completion of mechanical...

162 65, 162 72, 162 90, D21C 100

Patent

active

040917495

ABSTRACT:
A lignocellulosic material, such as wood chips, is pretreated with an aqueous solution containing from 0.1 to 10% by weight of a water soluble lower aliphatic amine selected from monoethanolamine, methylamine and dimethylamine, at elevated temperature and pressure in a closed vessel. This pretreated material is then subjected to conventional soda or two-stage soda-oxygen pulping.

REFERENCES:
patent: 2218479 (1940-10-01), Peterson et al.
patent: 2668110 (1954-02-01), Spencer et al.
patent: 3520773 (1970-07-01), Vinje et al.
patent: 3691008 (1972-09-01), Worster et al.
patent: 3695994 (1972-10-01), Worster et al.
patent: 3829357 (1974-08-01), Thompson et al.
patent: 3951732 (1976-04-01), Sjostrom et al.

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