Hans Liebern

Title: The Innovative Contributions of Hans Liebern

Introduction

Hans Liebern, an accomplished inventor based in Mulheim an der Ruhr, Germany, has made significant strides in the field of chemical processes, particularly pertaining to alcohol production. With a total of two patents, Liebern's work exemplifies creativity and innovation within the chemical engineering industry.

Latest Patents

Liebern's latest inventions focus on the methods for preparing alcohols through advanced hydrogenation techniques.

1. **Process for Preparing Alcohols**: This patent details a process that involves hydrogenating aldehydes in the presence of a hydrogenation catalyst within the gas phase. A significant improvement highlighted in this process is the addition of nitrogen-containing bases to the aldehyde. This innovation minimizes by-product formation, enhancing the selectivity and yield of the desired alcohols.

2. **Process for the Preparation of Alcohols in Two Stages**: This two-stage method involves reacting organic carbonyl compounds with hydrogen at elevated temperatures, and optionally under pressure. The first stage employs a copper-containing catalyst to convert hydrogen and carbonyl compounds with an impressive conversion rate ranging from 80 to 99.5 percent. In the second stage, the reaction product is directed to a nickel/alumina/zirconium dioxide catalyst, where it continues to process alongside hydrogen. The carbonyl compounds in this patent include aldehydes and their derivatives, particularly focusing on aliphatic unsaturated and saturated aldehydes.

Career Highlights

Throughout his career, Hans Liebern has been associated with leading corporations in the chemical industry, including Celanese GmbH and Hoechst Aktiengesellschaft. His work in these firms has laid a foundation for his inventive pursuits, allowing him to collaborate with some of the brightest minds in the field.

Collaborations

Liebern has had the opportunity to work alongside distinguished coworkers such as Carl Dieter Frohning and Wolfgang Zgorzelski. These collaborations have not only enriched his professional journey but have also led to shared innovations and advancements in their respective fields.

Conclusion

In conclusion, Hans Liebern's contributions to the preparation of alcohols through innovative processes mark him as a notable figure in the realm of chemical engineering. His patents signify not just individual achievement but also the collective effort within the industry to advance methods and improve efficiency in chemical processes. Through his work, Liebern continues to inspire future inventors and researchers aiming to innovate within their fields.