Company Filing History:
2 out of 595 
1 out of 12,165 
Years Active: 1980-1982
Title: The Innovations of Hans Frey
Introduction
Hans Frey is a notable inventor based in Bettingen, Switzerland. He has made significant contributions to the field of chemistry, particularly in the production of specialized chemical compounds. With a total of 2 patents to his name, Frey's work has had a lasting impact on various industrial processes.
Latest Patents
Frey's latest patents include a process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid. This innovative process involves sulfonating naphthalene, nitrating the sulfonation product, and separating the pure magnesium salt of the compound. Additionally, he has developed a continuous reduction process for the reduction of aromatic nitro compounds to amino compounds in the liquid phase using iron as a reducing agent. This method emphasizes the continuous removal of reaction products while maintaining an excess of reducing iron in the reactor.
Career Highlights
Throughout his career, Hans Frey has worked with prominent companies such as Ciba-Geigy AG and Bayer Aktiengesellschaft. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in chemical processes.
Collaborations
Frey has collaborated with notable colleagues, including Bernhard Albrecht and Vinzenz Habermacher. These partnerships have fostered an environment of innovation and creativity, leading to the development of his patented processes.
Conclusion
Hans Frey is a distinguished inventor whose work in chemical processes has paved the way for advancements in the industry. His patents reflect a commitment to innovation and a deep understanding of chemical engineering.