Pulping & Bleaching

November 2 - 4, 2020 | Virtual

Pulping & Bleaching


View Pulping & Bleaching Track Schedule




Amy Duncan
Dos Santos International, LLC



No Cost Solution for Woodchip Handling

Session 6  •  Monday, November 2  •  3:00pm - 3:30pm

Sandwich belt high angle conveyors have found wide use in the marketplace along with recognition of substantial savings. The system can be found in varying applications and has demonstrable environmental benefits. Furthermore, sandwich conveyors are suitable for applications in chip handling and have proven that once the cost saving benefit is calculated, the phrase “money for nothing and chips for free” rings true.

The replacement of blowlines and low angle conveyor systems with the sandwich conveyor system allows for cost savings and the protection of money making commodities.

This presentation will explore the many benefits of using a sandwich belt conveyor for chip handling.


Howard Kaplan Kaplan Consulting, LLC
Wayne Buschmann, Clean Chemistry Inc.

Peracetate/Singlet Oxygen Chemistry Used in Post-Bleaching of Kraft Pulp is a Practical Oxidant for Paper Machines
Session 21 • Tuesday, November 3rd • 5:00pm – 5:30pm

Pulp mills are continually looking to optimize their bleaching processes without negatively impacting the paper machine operation. Traditional bleaching oxidants such as chlorine dioxide and hydrogen peroxide are known to cause corrosion on machinery metals and press felts and when used in biocide treatments can significantly degrade press felt life when concentration thresholds are exceeded. One novel approach for brightening bleached kraft pulp is sodium peracetate (singlet oxygen chemistry). This oxidant has exciting potential for technical performance, supply logistics, safety and cost reduction. Studies have shown it to be less corrosive than chlorine, bromine, and hydrogen peroxide on metal and press felt nylon fiber, therefore allowing its use at higher levels than other chemistries to increase brightness without increasing negative downstream impact. Peracetate can also be used with current biocide programs without consumptive degradation.

This presentation will explore the capabilities of this novel oxidant in high-density storage chests for brightening/whitening and to increase color stability.


Pulping & Bleaching Track Schedule

(Program is subject to change.) 

 Monday, November 2

1:15pm - 2:15pm 
Session 3: Cancelled
3:00pm - 4:00pm
Session 6: Best Cooking and Washing

Session Chair: Adam RoppBuckman


Down Flow Cooking Process Optimization – A Case Study At A Southern US Mill

Marcio Silveira, Normandeau Guy, BTG


No Cost Solution to Woodchip Handling

Amy Duncan, Dos Santos International, LLC



Energy Saving Potential of Screen Fractionation for Production of BCTMP

Quanqing Zha, Reza Amiri, and Zhirun Yuan, FPInnovations


 Tuesday, November 3


3:15pm - 4:45pm
Session 18: Effective Bleaching Strategies

Session Chair: Mathias Lindström, International Paper


Impact of Ozone Bleaching on Effluent Discharge

Alexis Métais, Xylem and Hannu Råmark, Andritz Oy

Extension of a Steady-State Chlorine Dioxide Brightening Model for Z-ECF Bleaching of Softwood Kraft Pulps

Brian N. Brogdon, Future Bridge Consulting Services, LLC and Lucian A. Lucia, North Carolina State University 

Pulp Bleaching, ClO2 Technology & Related Challenges

J. Barry BillettNouryon
5:00pm - 6:00pm
Session 21: The Bleaching Environment

Session Chair: Ashok Ghosh, WestRock


Peracetate/Singlet Oxygen Chemistry Used in Post-Bleaching of Kraft Pulp is a Practical Oxidant for Paper Machines

Howard Kaplan, Kaplan Consulting, LLC; Wayne Buschmann, Clean Chemistry Inc.
       Xylan Adsorption on Cellulose: A Fundamental Thermodynamics Study Christopher Albert, Thomas SchwartzUniversity of Maine; M. Sefik Tunc, Gary Craig, Darrell Waite, Sappi North America