Location History:
- Dortmund, DE (1981 - 1985)
- Bad Soden, DE (1989 - 1990)
Company Filing History:
8 out of 140 
1 out of 1 Years Active: 1981-1990
Title: Jurgen Stadelhofer: Innovator in Chemical Engineering
Introduction
Jurgen Stadelhofer is a notable inventor based in Dortmund, Germany, recognized for his contributions to the field of chemical engineering. With a total of nine patents to his name, he has made significant advancements in the production and application of modified pitches and the separation of phenols and bases from coal tar oils.
Latest Patents
Stadelhofer's latest patents include a method for the production of modified pitches. This innovative approach modifies pitches with specific aromatically substituted and activated C1 to C4 alkyl groups, allowing for easier polycondensation and resulting in high coking residues and good mesophase formation. Notably, this method eliminates the need for catalysts, which can be difficult to remove from the pitch, and utilizes reactive short-chain alkyl aromatic compounds. Another significant patent involves a method for the separation of phenols and bases from coal tar oils. This process quantitatively separates coal tar oil into neutral oil, phenols, and bases through a two-stage extraction using overcritical gases. Carbon dioxide serves as the extraction agent, with propane or butane added as entrainers. This method is energy-efficient and generates no byproducts.
Career Highlights
Throughout his career, Jurgen Stadelhofer has worked with prominent companies, including Rutgerswerke Aktiengesellschaft and Rutgerwerke Aktiengesellschaft. His work has significantly impacted the chemical engineering sector, particularly in the development of efficient methods for processing coal tar and modifying pitches.
Collaborations
Stadelhofer has collaborated with notable professionals in his field, including Heinz-Gerhard Franck and Helmut Kohler. These collaborations have contributed to the advancement of his innovative methods and patents.
Conclusion
Jurgen Stadelhofer's contributions to chemical engineering through his patents and collaborations highlight his role as a significant inventor in the industry. His innovative methods continue to influence the field and pave the way for future advancements.