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Von Pechmann was born in Nürnberg, the only son of a doctor, who was also named Hans.The von Pechmanns had distinguished themselves as soldiers; in 1702, von Pechmann's ancestor Martin Günther von Pechmann, a general of artillery in the Bavarian army, had been raised to the rank of a baron of the Holy Roman Empire by Leopold I. [6]
The earliest beginnings of polyethylene-based pipes occur when German scientist, Hans von Pechmann, discovered a waxy residue at the bottom of a test tube, colleagues Eugen Bamberger and Friedrich Tschirner called it polymethylene but it was discarded as having no commercial use at the time. [14] 1904
1898: Synthesis of polyethylene, the most common plastic, by Hans von Pechmann [159] 1898: First synthesis of purine by Emil Fischer. He had also coined the word in 1884. [160] Early 20th century: Schlenk flask by Wilhelm Schlenk [161] 1900s: Haber process by Carl Bosch and Fritz Haber [133] 1902: Ostwald process by Wilhelm Ostwald [162]
Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane. [12] [a] [13] [b] When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white, waxy substance that he had created, they recognized that it contained long −CH 2 − chains and termed it polymethylene.
in 1899 Hans von Pechmann added diazomethane to ether, and noted the formation of polymethylene, a type of polyethylene, identified in 1900 by Eugen Bamberger and Friedrich Tschirner, but had not realised that it has any commercial significance; ICI in Cheshire in England will, in 1933
Justus von Liebig: German chemist who made contributions to agricultural and biological chemistry. Otto Lilienthal: Father of Aviation and first successful aviator. Main discovery was the properties and shape of the wing. Carl von Linde: Engineer who, among other things, developed refrigeration and gas separation technologies.
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Polyethylene is first synthesized by German chemist Hans von Pechmann. Exploration. January 30–February 13 ...
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