Karl Rottgen

Title: Karl Rottgen: Inventor in Electrothermal Phosphorus Production

Introduction

Karl Rottgen is an inventor associated with Erftstadt, Germany, and Hoechst Aktiengesellschaft. His patent work addresses the production of yellow phosphorus in an electrothermal furnace and the removal of foreign components from the production cycle. He is credited with 1 patent.

Latest Patents

Rottgen’s patent, “Process for the Electrothermal Production of Yellow Phosphorus,” describes a method for removing contaminants, especially zinc, from the production cycle. The process uses materials and by-products from the furnace, including ferrophosphorus, calcium metasilicate slag, and dust carried in a gas mixture consisting mainly of carbon monoxide and phosphorus vapor.

After electrostatic separation, the dust is treated with water to form a suspension. Crude phosphate is granulated with this suspension and a binder, preferably clay suspension, then calcined to produce phosphate pellets. A portion of the furnace slag is solidified, ground, and granulated with dust suspension. The resulting material is dried and calcined into pellets, with additional grinding, granulation, and drying steps possible. The method thus reuses furnace by-products while helping remove unwanted components from the process.

Career Highlights

Rottgen’s documented patent contribution concerns an industrial process for yellow phosphorus production. The invention focuses on integrating dust and slag treatment into the production cycle, with the aim of recovering useful material and reducing contaminants.

Collaborations

Rottgen is associated with Hoechst Aktiengesellschaft. Herbert Diskowski and Joachim Stendel are identified as his coworkers.

Conclusion

Karl Rottgen’s patent describes a process that combines contaminant removal with the reuse of dust and slag in electrothermal yellow phosphorus production.