FIELD: textiles, paper.
SUBSTANCE: method includes the use of three batch-operated cooking boilers for bisulfite pulping, sequentially interconnected by a liquid phase, the extraction of wood chips with its predetermined duration of lignosulphonate solution, boiling chips, while the extract is removed from the boilers by its displacement by bisulphite cooking liquor. Extraction of wood chips and filling the boilers with the cooking liquor is carried out in a controlled automatic manner following the sensor signals of filling the boilers with the liquid phases.
EFFECT: invention enables to improve the degree of removal from chips of arabinogalactan and flavonoids, to obtain the extract with the high concentration of these components in it, and to provide the ability to control automatically flows of the liquid phases in the boiler when processing chips.
3 cl, 1 ex
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