BFRTM : a new process toward bleach plant closure

A technical and economical assessment of the feasibility of recovering chloride-containing bleach filtrates in a conventional kraft recovery system has been completed. This investigation has led to the development of a process for recovering filtrates from the bleach plant. The process is applicable for both hardwoods and softwoods. Filtrates from the bleach plant are used for brownstock washing and are thereby recovered in the conventional recovery cycle. A process was developed to remove chloride from the mill liquor cycle. Computer simulations predict that the chloride concentration in the mill liquor cycle can be maintained at concentrations typical of inland mills. The process for removing chloride also removes potassium compounds