Rudolf Rossmeissl

Title: Rudolf Rossmeissl: Innovator in Monochloroacetic Acid Production

Introduction

Rudolf Rossmeissl is a notable inventor based in Mertingen, Germany. He has made significant contributions to the field of chemical engineering, particularly in the production of monochloroacetic acid. With a total of 3 patents to his name, Rossmeissl's work has had a considerable impact on the industry.

Latest Patents

One of Rossmeissl's latest patents is a process for the preparation of a particularly pure monochloroacetic acid. This innovative method involves a two-step process. In the first step, a hydrogenation of a mixture of mono- and dichloroacetic acid is performed, achieving a residual content of dichloroacetic acid between 400 to 600 ppm. The second step involves subjecting this mixture to melt crystallization. The hydrogenation is conducted using a heterogeneous catalyst that contains 0.1-5.0% by weight of palladium, supported by active charcoal or silicon dioxide. Another significant patent involves the partial electrolytic dehalogenation of dichloroacetic and trichloroacetic acids. This process converts these acids into monochloroacetic acid by electrolyzing aqueous solutions in divided electrolysis cells with carbon cathodes. The solutions also include metal salts with a hydrogen overvoltage of at least 0.4 volts, ensuring minimal hydrogen evolution at the cathode.

Career Highlights

Rudolf Rossmeissl is associated with Hoechst Aktiengesellschaft, a prominent company in the chemical industry. His work has been instrumental in advancing the methods of producing essential chemical compounds. His innovative approaches have not only improved efficiency but also enhanced the purity of the products.

Collaborations

Rossmeissl has collaborated with notable colleagues such as Steffen Dapperheld and Frank Ebmeyer. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Rudolf Rossmeissl's contributions to the field of chemical engineering, particularly in the production of monochloroacetic acid, highlight his role as a significant inventor. His patents reflect a commitment to innovation and excellence in the industry.