Spent bleach liquor composition

TABLE 8-4. Composition of the Organic Material in Spent Bleach Liquor from Chlorination and Alkali Extraction Stages (Pine Kraft Pulp)a... [Pg.164]

The spent bleach liquors are complicated mixtures of reaction products, only some of which have been identified. A simple classification according to the type of compounds present has been made in Table 8-4. As can be seen, lignin degradation products dominate in the spent liquors from chlorination and alkali extraction. Because of extensive demethylation of lignin, considerable amounts of methanol are present in the chlorination liquors. The amount of low molecular chlorinated aromatics is very low, but since the most toxic compounds are included in this fraction, clarification of its complicated composition has been the subject of intensive research. [Pg.165]

Pfister, K., and Sjostrom, E. (1979). Characterization of spent bleaching liquors. Part 6. Composition of material dissolved during chlorination and alkali extraction (OCE sequence). Pap. Puu 61, 619-622. [Pg.168]

Big Chemical Encyclopedia