Removing terpene(s) from condensate of evaporated kraft liquor - by flocculation with an aluminium or iron salt (SW 21.7.80)

摘要

To waste water from the treatment of resinous wood, partic condensates. A lewis acid of the type Al salt or Fe salt is added as flocculant, followed by waiting for the flocs to enlarge and then sepg. the liq. Process is used in the paper making industry. Although terpenes are recovered in the first two stages of the Kraft process, further material arises from evapn. of black liquor. It avoids pollution and enables further terpene recovery.