Walter Roggenstein

Title: Walter Roggenstein and a Method for Separating Pigment Particles.

Introduction

Walter Roggenstein is an inventor associated with Freiburg, Germany, and Rhodia AG. His recorded patent concerns separating pigment particles by gravity sedimentation, with an application relevant to producing fine-grained pigments for man-made fibers. His listed portfolio includes 1 patent.

Latest Patents

Roggenstein’s patent, “Method for Separating Coarse Grained and Agglomerate Pigment Particles,” describes a method and apparatus for separating coarse and agglomerated particles from finer particles in a suspension. The suspension, such as titanium dioxide powder mixed with water, enters a vessel from below and flows upward between stationary, parallel plates set at an angle to the horizontal.

Fine-grained particles are removed from the upper part of the vessel, while the lower outlet carries suspension containing primarily coarse and agglomerated particles. The patent describes this continuous process as improving separation compared with prior methods. The resulting finer pigment particles are suitable for imparting a matte surface in the chemical fiber industry.

Career Highlights

Roggenstein’s documented invention addresses pigment processing through a gravity-based separation system. Its design combines upward suspension flow with angled plates and separate outlets to sort particles by their settling behavior. The available information identifies Rhodia AG as his company.

Collaborations

Paul Rustemeyer is identified as Roggenstein’s coworker. The available details do not specify his role in the patent or the invention.

Conclusion

Walter Roggenstein’s recorded patent presents a continuous approach to separating coarse and agglomerated pigment particles from finer material, with potential value in producing pigments for man-made fibers.