Pulp Bleaching

 

This two-day course gives a comprehensive overview of pulp bleaching processes.

 

The aim is to provide a full understanding of the principle of bleaching and of the way the bleaching reagents operate. The information should make it possible to discuss the merits and drawbacks of industrial bleaching lines and to design optimum sequences depending on the mill constraints.

 

Course delivery calendar upon request.

 

Who should attend

This course should be useful to anyone willing to get introduced to the pulp bleaching science and technology, to those in charge of pulp mill operation and development or working at chemicals and equipment suppliers.

 

Content

The course will address the following topics :

 

·       Chemical structure of the components responsible for the color of chemical pulp

·       Purpose and characterization of chemical pup bleaching

·       Chemistry and conditions of application of the main bleaching chemicals: chlorine dioxide, oxygen, hydrogen peroxide, ozone, peracetic acid, caustic soda

·       Specific bleaching equipment

·       Worldwide bleaching sequences today. ECF, light ECF and TCF processes

·       Examples of most modern bleaching lines in kraft pulp mills

·       Bleached pulp quality: strength and brightness stability

·       OPEX and CAPEX of bleaching lines

·       Washing strategy and effluent characteristics

·       Bleached market pulp development

·       Bleaching and yellowing of mechanical pulps

 

Instructors

 

Prof. Dominique Lachenal, Grenoble INP Pagora, recipient of the Tappi Pulp Manufacture Division Award, TAPPI Research and Development Technical Award, PAPTAC Weldon Award, Zellcheming A. Mitscherlich Denkmünze

 

Dr Jean Christophe Hostachy, PhD Chemical Engineering Grenoble INP, EMBA Lyon Business School.

 

Prof. Christine Chirat, Grenoble INP Pagora, Research Group Leader, Pulping, Bleaching and Biorefinery, Member of the International Academy of Wood Science