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Delignification with nitric acid

Izvestiya Vysshikh Uchebnykh Zavedenii, Lesnoi Zhurnal ( 3): 89-95

Delignification with nitric acid

Wood chips and sawdust of birch and spruce were treated in a 2-stage process with nitric acid (conc. 50-90 g/litre) and then with dilute aqueous ammonia at temperatures not exceeding 90 degrees C. Polarographic and spectrophotometric studies were made of the extracts, and also the polymolecular and functional composition of the ammonia extracts.

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Accession: 002590226

Related references

Kinetics of wood delignification with nitric acid. Zhurnal prikladnoi khimii: 49 (12) 2735-2738, 1976

Behaviour of different wood species during nitric acid delignification. Khimiya Drevesiny (5): 53-59, 1980

Changes in the capillary volume of birch wood during nitric acid delignification. Khimiya Drevesiny (3): 105-106, 1977

Peculiarities of delignification of wood of different species at interaction with the solution of nitric acid. Khimiia drevesiny: (5) 53-59, 1980

Selectiveness of delignification and dissolution of pentosanes during nitric acid cooking of aspen wood. 1977

Change in submicroscopical porosity of birch wood in the process of nitric acid delignification. 1977

Polychronic kinetics of the processes of wood delignificatin. I. Process of nitric acid delignification. Khimiia drevesiny: (6) 50-58, 1980

Studies of lignin produced by the nitric acid method of birch wood delignification. Khimiia drevesiny: (5) 60-66, 1980

Studies of lignin obtained by the nitric acid method of birch wood delignification. I. Isolation from spent liquor. Khimiia drevesiny: (3) 77-80, 1980

Delignification by nitrogen compounds. II. Pulping Spruce, Birch, Bamboo and bagasse with nitric-nitrous acid mixtures. Pulp Paper Mag. Can, Convention 66, T165-T170, 1965