Ammonia-ketone pulping process

Details Ammonia-ketone pulping process Ammonia-ketone pulping process

1974-10-11

1976-04-20

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 90, D21C 302, D21C 320

Patent

active

039517349

ABSTRACT:
A method of employing the combination of ammonia and ketones as the cooking chemicals in a digester of a pulping process. This method results in a pulp which has a higher yield than the kraft process yet is characterized by kraft's high strength and fair bleachability. The spent liquor extracts are primarily lignin and contain little cellulose and hemi-cellulose.

REFERENCES:
patent: 1975161 (1934-10-01), Kipper
patent: 2068151 (1937-01-01), Remler
patent: 2070585 (1937-02-01), Dreyfus
patent: 2192202 (1940-03-01), Peterson et al.
patent: 2538457 (1951-01-01), Hudson
rydholm, Pulping Processes, 1965, p. 1156, GP 170.
"Delignification with Ketones and Ammonia", Tappi Manual, Vol. 57, No. 5, 5-1974, pp. 127-130.

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