Ozone is a toxic gas generated by applying a high voltage to oxygen. The first commercial use of ozone for bleaching was in 1992, so ozone is relatively new for pulp bleaching. However, ozone provides several economic and environmental benefits over other chemical options for elemental chlorine free (ECF) and totally chlorine free (TCF) bleaching. This course discusses the benefits of ozone bleaching, its chemistry, how it is generated, and the process and equipment involved in ozone bleaching.
•State the benefits of ozone bleaching (compared to other chemistries)
•Describe ozone bleaching chemistry
•Explain how ozone is generated
•Explain how ozone bleaches pulp
•Identify important ozone bleaching variables
•Identify and describe ozone bleaching processes and equipment
•Identify and describe safety hazards and safe work practices associated with ozone bleaching
