James K Turnbull

Title: Innovations of James K. Turnbull in Mechanical Pulp Brightening

Introduction

James K. Turnbull is an accomplished inventor based in Vancouver, Canada. He is known for his significant contributions to the field of mechanical pulp processing. His innovative methods have advanced the efficiency and effectiveness of pulp brightening techniques.

Latest Patents

Turnbull holds a patent for a method of brightening mechanical pulp using silicate-free peroxide. This method involves chelating and thickening to reduce the manganese content of the pulp to less than 30 parts per million and the copper content to less than 1 part per million. The process includes adding magnesium ions as magnesium sulfate in specific amounts and applying a bleaching liquor composed of hydrogen peroxide and sodium hydroxide. The treated pulp is then bleached in a tower to achieve a brightness equivalent to that obtained by traditional methods.

Career Highlights

Turnbull has worked with Macmillan Bloedel Limited, where he has applied his expertise in pulp processing. His innovative approach has led to advancements in the industry, particularly in the area of environmentally friendly bleaching methods. His work has been recognized for its potential to improve the quality of mechanical pulps while minimizing environmental impact.

Collaborations

Throughout his career, Turnbull has collaborated with notable colleagues, including Donald T. Eadie and Bernard H. Hetzler. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

James K. Turnbull's contributions to the field of mechanical pulp brightening demonstrate his commitment to innovation and sustainability. His patented methods have the potential to revolutionize the industry, making it more efficient and environmentally friendly.