FIELD: paper-and-pulp industry. SUBSTANCE: wood chips are cooked at 100 to 250 C in organic solvent: phenol compounds-based tar, more particularly inhibitory wood-tar oil or its mixture with creosote wood-tar oil at their ratio from 70:30 to 65:35. Indicated product contains phenols, organic acids, and neutral materials. Cooking is carried out at tar-to-waste water ratio from 2.5:1 to 19:1 Main fraction of the above-indicated oils boils in the range 245-290 C. EFFECT: enabled utilization of resin industry waste and accelerated cooking process, increased lignin selectivity of cooking liquor. 2 cl, 2 tbl, 5 ex
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Authors
Dates
2000-07-10—Published
1999-12-24—Filed