Håkan Fägersten

Title: Håkan Fägersten: Innovator in Pulp Treatment Technologies

Introduction

Håkan Fägersten is a notable inventor based in Kode, Sweden. He has made significant contributions to the field of pulp treatment, holding 2 patents that focus on innovative processes for bleaching and treating pulp derived from alkaline pulping processes.

Latest Patents

Fägersten's latest patents include a process for bleaching pulp that involves three chlorine dioxide stages (D0, D1, and D2). This process is designed for pulp with a hexenuronic acid content prior to the final bleaching stage, ranging from about 1 to about 80 mmol/kg dry pulp. The chlorine dioxide charges are carefully distributed across the stages, with D0 receiving about 40 to 60%, D1 about 30 to 55%, and D2 about 4 to 20%. The final bleaching stage is performed at a pH of approximately 2 to 4.5. Additionally, he has developed a method for treating an aqueous suspension of bleached pulp, which includes dewatering and drying the suspension while maintaining a pH range of about 6.5 to 12.

Career Highlights

Throughout his career, Håkan Fägersten has worked with prominent companies such as Akzo Nobel and Akzo Nobel Pulp and Performance Chemicals. His work has significantly advanced the methodologies used in pulp treatment, contributing to more efficient and environmentally friendly processes.

Collaborations

Fägersten has collaborated with notable professionals in his field, including Thomas Christopher Greschik and Magnus Björklund. These collaborations have further enriched his work and innovations in pulp treatment technologies.

Conclusion

Håkan Fägersten's contributions to the pulp industry through his innovative patents and collaborations highlight his role as a key inventor in this field. His work continues to influence the efficiency and sustainability of pulp treatment processes.