Hans-Werner Michalczak

Title: Innovations of Hans-Werner Michalczak

Introduction

Hans-Werner Michalczak is a notable inventor based in Herne, Germany. He has made significant contributions to the field of chemical engineering, particularly in the preparation of diisocyanates. With a total of 9 patents to his name, Michalczak's work has had a considerable impact on the industry.

Latest Patents

Among his latest patents is a process for the continuous preparation of (cyclo)aliphatic diisocyanates. This invention relates to a multi-stage process that allows for the phosgene-free preparation of these compounds. The process involves converting (cyclo)aliphatic diamines into the corresponding (cyclo)alkylene biscarbamates, followed by thermal cleavage to produce (cyclo)alkylene diisocyanates and alcohol. Another significant patent focuses on the multistage continuous preparation of cycloaliphatic diisocyanates. This method includes reacting cycloaliphatic diamines with carbonic acid derivatives and alcohol to create cycloaliphatic diurethanes, which are then thermally cleaved to yield the desired diisocyanates.

Career Highlights

Throughout his career, Michalczak has worked with prominent companies such as Degussa Aktiengesellschaft and Hüls Aktiengesellschaft. His experience in these organizations has contributed to his expertise in chemical processes and innovations.

Collaborations

Some of his notable coworkers include Stephan Kohlstruk and Manfred Kreczinski. Their collaboration has likely fostered a productive environment for innovation and development in their respective fields.

Conclusion

Hans-Werner Michalczak's contributions to the field of chemical engineering through his patents and collaborations highlight his role as a significant inventor. His innovative processes for the preparation of diisocyanates continue to influence the industry.