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2 298 056

(13)

(51)

IPC

D21C3/02(2006-01-01)

B01J37/34(2006-01-01)

(21) (22)

Application

2005127502/12, 2005-09-01

(24)

Start date

2005-09-01

(22)

Actual filing date

2005-09-01

(45)

Published

2007-04-27

(72)

Inventor

Vurasko Alesja Valer'EvnaDriker Boris Nutovich

(73)

Holder

Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Ural'Skij Gosudarstvennyj Lesotekhnicheskij Universitet

WOOD DELIGNIFICATION CATALYST PREPARATION METHOD Russian patent published in 2007 - IPC D21C3/02 B01J37/34

Abstract RU 2298056 C1

FIELD: woodworking and resin industries.

SUBSTANCE: invention concerns anthraquinone-based wood delignification catalyst, which can be used in vegetable stock cooking process involving alkaline technologies. Method comprises liquid-phase interaction of anthracene with oxidant in organic solvent followed by crystallization of anthracene. The latter operation is conducted for 1 to 10 min in presence of benzoic acid (consumption 0.01-0.3%) in ultrasonic field generated by ultrasonic emitter at acoustic power 0.6 kW and frequency 22 kHz.

EFFECT: increased catalytic activity of anthraquinone and reduced consumption of catalyst.

3 cl, 4 tbl, 4 ex

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RU 2 298 056 C1

Authors

Vurasko Alesja Valer'Evna

Driker Boris Nutovich

Dates

2007-04-27—Published

2005-09-01—Filed