PROCESS FOR TREATING HARDWOOD BLACK LIQUOR AND HARDWOOD BLACK LIQUOR TREATED ACCORDING TO THE PROCESS

摘要

A process for treating a hardwood black liquor from the manufacturing of hardwood pulp in order to precipitate calcium compounds present in the liquor wherein the process comprises the steps of; providing a hardwood black liquor from the manufacturing of hardwood pulp and treating at least one part of said liquor at a temperature of above 160°C wherein the calcium compounds present in the black liquor will precipitate. The invention also relates to hardwood black liquor being treated according to the process.