Location History:
- Hemsbach, DE (1980 - 1992)
- Hemsbach a.d. Bergstrasse, DE (1992)
Company Filing History:
Years Active: 1980-1992
Title: Emmerich Pastorek: Innovator in Chemical Synthesis
Introduction
Emmerich Pastorek is a notable inventor based in Hemsbach, Germany. He has made significant contributions to the field of chemical synthesis, particularly in the preparation of specialized compounds. With a total of eight patents to his name, Pastorek's work has advanced the understanding and production of important chemical substances.
Latest Patents
Pastorek's latest patents focus on the preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene. One of his innovative methods involves the condensation of fluorenone and phenol in a molar ratio of 1:4 to 1:8 at temperatures ranging from 30 to 90 degrees Celsius. This process utilizes gaseous hydrogen chloride and β-mercapto-propionic acid as catalysts. An improvement in this method includes mixing the completed reaction mixture with a polyalkylene glycol, distilling excess phenol, and recovering the crystallized product through a series of steps that yield highly pure 9,9-bis-(4-hydroxyphenyl)-fluorene as white crystals. Another patent describes a similar process, emphasizing the distillation of water and hydrochloric acid from the reaction mixture, followed by the separation of the crystallized adduct of nitrile and 9,9-bis-(4-hydroxyphenyl)-fluorene.
Career Highlights
Pastorek is associated with Rutgerswerke Aktiengesellschaft, where he has been instrumental in developing innovative chemical processes. His expertise in chemical synthesis has led to advancements that benefit various applications in the industry. His work is characterized by a commitment to improving the efficiency and purity of chemical products.
Collaborations
Throughout his career, Pastorek has collaborated with notable colleagues, including Winfried Orth and Werner Fickert. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.
Conclusion
Emmerich Pastorek's contributions to chemical synthesis, particularly in the preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene, highlight his role as a significant inventor in the field. His patents reflect a dedication to advancing chemical processes and improving product quality.