Location History:
- Schildgen, DE (1977 - 1979)
- Berg.-Gladb., DE (1982)
Company Filing History:
Years Active: 1977-1982
Title: Norbert Majer: Innovator in Chemical Processes
Introduction
Norbert Majer is a notable inventor based in Schildgen, Germany. He has made significant contributions to the field of chemistry, particularly in the development of processes related to anthraquinones. With a total of 3 patents to his name, Majer continues to push the boundaries of innovation in his field.
Latest Patents
Majer's latest patents include a process for the preparation of monoaroylated 1,4-diaminoanthraquinones. This innovative method involves contacting 1,4-diaminoanthraquinone with an aroyl halide in the presence of an organic solvent and an acid-binding agent, along with a small amount of water at elevated temperatures. The process is enhanced by the inclusion of a tertiary aliphatic aminoalcohol and/or quaternary ammonium compound, starting the reaction at temperatures between 20°C to 50°C and completing it at 80°C to 130°C after the addition of the aroyl halide.
Another significant patent is the process for concentrating halogenoanthraquinones. This method focuses on separating individual halogenoanthraquinones from mixtures through fractional vacuum distillation in a heated rectification column. The process is designed to efficiently separate various chloroanthraquinones, which are obtained through the action of chlorine, chloric acid, or a chlorate on industrial mixtures of nitro- or sulfo-anthraquinones.
Career Highlights
Norbert Majer is currently associated with Bayer Aktiengesellschaft, a leading global company in the pharmaceutical and life sciences sector. His work at Bayer has allowed him to apply his innovative ideas in a practical setting, contributing to the company's advancements in chemical processes.
Collaborations
Majer has collaborated with notable colleagues such as Hans-Samuel Bien and Bernd Thelen. These partnerships have fostered a creative environment that encourages the exchange of ideas and the development of groundbreaking technologies.
Conclusion
Norbert Majer stands out as a prominent inventor in the field of chemistry, with a focus on innovative processes for anthraquinones. His contributions through patents and collaborations continue to influence the industry and pave the way for future advancements.