CHEMICAL METHOD

摘要

The invention relates to a processes for reducing the content of residual active chlorine in bleached and/or delignified pulp comprising the steps:(a) contacting flue gas comprising at least one sulfur compound with an aqueous liquid to at least partially absorb said at least one sulfur compound and yield one or more reducing sulfur compounds in said aqueous liquid; and,(b) contacting the bleached and/or delignified pulp with the aqueous liquid obtained in step (a), wherein said reducing sulfur compound reacts with the active chlorine in the pulp and decreases the content thereof.