Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps

摘要

A method for delignification and bleaching of cellulosic pulp which comprises reacting a cellulosic pulp with peracetic acid, ozone and oxygen under conditions of acidic pH. The ozone substantially completely reacts with the pulp and, thereafter, the oxygen reacts with the pulp under under an acidic pH.