Company Filing History:
Years Active: 1980
Title: Clemens Linden: Innovator in Anthraquinone Manufacturing
Introduction
Clemens Linden is a notable inventor based in Essen-Bergerhausen, Germany. He has made significant contributions to the field of chemical engineering, particularly in the manufacturing processes of anthraquinone. With a total of 2 patents to his name, Linden's work has advanced the efficiency and purity of anthraquinone production.
Latest Patents
Linden's latest patents include innovative processes for the manufacture of anthraquinone. The first patent describes a catalytic oxidative process where o-benzyl-toluene is oxidized with air or an oxygen-containing gas in an acetic acid solution. This process utilizes cobalt, manganese, and bromine salts as catalysts, with the addition of acetic anhydride to maintain constant acid concentration. The resulting crude o-benzoyl-benzoic acid is then esterified with methanol, distilled, and treated with concentrated sulfuric acid to yield anthraquinone in high yield and purity.
The second patent outlines a nitric acid process for anthraquinone production. In this method, o-benzyl-toluene is oxidized with 25 to 50 weight-% nitric acid at atmospheric pressure and moderate temperatures. This is followed by further oxidation with a more dilute nitric acid at elevated temperatures and pressures. The crude product undergoes esterification with methanol, distillation, and, if necessary, recrystallization, before being heated with concentrated sulfuric acid to produce anthraquinone of high yield and purity.
Career Highlights
Clemens Linden is currently employed at Bergwerksverband GmbH, where he continues to innovate in the field of chemical manufacturing. His expertise in catalytic processes has positioned him as a key figure in the development of efficient production methods for valuable chemical compounds.
Collaborations
Linden has collaborated with notable colleagues such as Kurt Handrick and Georg Kolling. Their combined efforts have contributed to advancements in chemical processes and the successful implementation of innovative manufacturing techniques.
Conclusion
Clemens Linden's contributions to anthraquinone manufacturing through his patented processes demonstrate his commitment to innovation in chemical engineering. His work not only enhances production efficiency but also ensures high purity levels in the final product.