A method of processing paulownia wood, wherein chips of annual paulownia wood are loaded into a cooking apparatus, poured with a cooking solution of sodium monosulfite, which includes SO2, at a hydraulic module of 5:1. The chips are soaked in this solution for 30 minutes with the temperature rising from 80 to 170 °C. Subsequently, they are directly cooked at a final temperature of 170 °C for 90, 120, and 150 minutes. For impregnation and cooking, a sodium monosulfite solution is used at a total SO2 concentration of 40 g/L. The resulting semi-finished product is ground in a centrifugal grinder and samples are made.

The utility model relates to methods of producing fibrous semi-finished products from hardwood, which are used for the production of paper and cardboard.

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