Company Filing History:
3 out of 198 
3 out of 111 
1 out of 1 
Years Active: 1983-2002
Title: Innovations of Harald Selder
Introduction
Harald Selder is a notable inventor based in Schlier, Germany, recognized for his contributions to the field of recycling and material processing. With a total of nine patents to his name, Selder has developed innovative processes that enhance the efficiency of recycling used paper and fibrous materials.
Latest Patents
One of Selder's latest patents is a process for dissolving used paper. This process involves adjusting the content of solid particles in the used paper to a range between about 15 and 35%. It includes kneading the used paper with a specific work of at least about 10 kWh/t, diluting the kneaded paper to a content of solid particles below about 6%, and separating non-fibrous contaminants through wet screening. Additionally, the process adjusts the solid material content to less than about 3% and separates heavy particles using at least one hydrocyclone. Another significant patent focuses on treating a fibrous material suspension using a combination of low-intensity and high-intensity flotation. This innovative method targets the removal of interfering materials from an aqueous fibrous material suspension, particularly those produced from recycled paper. The process effectively eliminates printing ink particles, small synthetic particles, and sticky contamination through a combination of gravitational and centrifugal flotation techniques.
Career Highlights
Throughout his career, Selder has worked with prominent companies such as Escher Wyss Limited and Sulzer-Escher Wyss Limited. His experience in these organizations has contributed to his expertise in the field of material processing and recycling technologies.
Collaborations
Selder has collaborated with notable professionals in his field, including Wolfgang Heinbockel and Erich Linck. These collaborations have likely enriched his work and led to further advancements in his innovative processes.
Conclusion
Harald Selder's contributions to the recycling industry through his innovative patents demonstrate his commitment to improving material processing techniques. His work not only enhances the efficiency of recycling used paper but also addresses the challenges associated with fibrous material suspensions.