Opportunities for Innovation in the Pulp and Paper Industry

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Opportunities for Innovation in the Pulp and
Paper Industry
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The Question of uniformity of the feedstock?
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• Possible option
• Finer chipping and fractionation,
• Followed by separate cooking

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Possible option Biotechnology to produce a
tree with more uniform fibers.
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Possible option Use fuzzy logic for
mathematical description and input to
feed-forward control.
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Possible option Population analysis-based
mathematical description and input to
feed-forward control.
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Personal example Development of POM-based
delignification technology.
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The basis for a new delignification technology
has been developed.
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Evolution of the Program   Key Technical
Advances  
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Guiding Principle Targeted fundamental research.
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Our technology is so brutal. We use very
aggressive thermal and chemical conditions. The
cellulose survives only because it is more
resistant than all the other constituents. Joh
n Strange, 1969
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Concept of inorganic lignin peroxidase
analogs 1990
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Polyoxometalates (POMs) identified in
1991
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Delignification Process
POM applied under anaerobic conditions to match
the selectivity of the peroxidases.
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Delignification Process
Requires procedure for re-oxidation of the
POM after it is reduced during delignification.
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Separation of the process into two stages

• Delignification
• Re-oxidation

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Re-oxidation

• Allows simultaneous oxidation of the organic
  byproducts of
• delignification.
• Provides the basis for Effluent- Free
  delignification.

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Process concept for liquid effluent-free
closed mill 1994
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O2
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• Consideration of pilot plant
• in 1996, 1998 1999 .
• Scale-up to 20 litre reactor
• in summer of 1999 .

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POM Development
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• Selectivity demonstrated using
• PV2Mo10
•  

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• Also closed-mill concept with
• separate delignification
• and re-oxidation validated.

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Optimization Along Two Paths

• More effective delignification
• with viscosity retention.
• Wet oxidation.

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• Families of POMs explored
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• SiVW11
• AlVW11
• SiV2W10

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• New synthesis
• Single step
• Thermodynamic
• equilibrium composition
• Self-buffering

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• Allows ready exploration
• of alternatives
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• Made possible
• SiV0.9MoW10.1
• SiV0.9MoMn0.1W10.1

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Wet Oxidation Evidence that the barriers to POM
re-oxidation are kinetic rather than
thermodynamic.
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Wet Oxidation After oxidation of the organics,
active oxygen species can reduce the POMox so
that progress of POM re-oxidation is limited.
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• Allows ready exploration
• of alternatives
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• Made possible
• SiV0.9MoW10.1
• SiV0.9MoMn0.1W10.1

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Paper Properties Properties of POM bleached
pulps match and may exceed those of ECF pulps.
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Economic Analyses With minimal additional
optimization, POM bleaching is equal to, or
better than current ECF technologies with respect
to economic feasibility.
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Thank you for your attention! Questions?