Oxygen Delignification

Oxygen delignification processes are located between the pulp mill and the traditional bleach plant. The goal of oxygen delignification is to reduce the lignin content of unbleached pulp before using more expensive bleaching chemicals. Even though it has been known to be an effective bleaching chemical for many years, several obstacles prevented commercialization until 1970. The obstacles and their solutions will be discussed in this course along with oxygen delignification processes, equipment, and safety.

•Define the goal of oxygen delignification •Describe the advantages and disadvantages of oxygen delignification •Describe the basics of oxygen delignification chemistry •Define selectivity and identify methods to impact selectivity •Identify and describe the variables affecting oxygen delignification •State the impact of poor washing •Describe the safety hazards and safety guidelines associated with oxygen •Identify and describe the processes and equipment used in oxygen delignification