Hermann Bleibtreu

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Hermann Bleibtreu (born March 4, 1821 in Pützchen near Bonn , † April 25, 1881 in Bonn) was a German chemist and inventor of German Portland cement .

In addition to the production of cement, Bleibtreu was also active in the extraction of lignite . The Bleibtreusee in the Ville is named in his honor and was created from a flooded open pit .

Life

His father was the mine and factory owner Leopold Bleibtreu (1777–1839), founder of the Alaunhütte on the Ennert-Hardt . Hermann Bleibtreu studied at the Universities of Bonn and Gießen and at the Royal College of Chemistry in London. He graduated from the University of Giessen under the dean's office Justus von Liebigs .

In the 1850s William, the son of Joseph Aspdin , had brought his Portland cement to Germany. In 1853, Hermann Bleibtreu burned his first cement (see cement clinker ) in his laboratory near the Anna-Magdalena-Grube on the Alaunhütte.

From 1852 to 1855 Bleibtreu built a Portland cement factory in Züllchow near Stettin . In 1855 the Stettiner Portland Cement Factory was founded as a stock corporation, Bleibtreu became its first operations manager.

In 1856 Bleibtreu changed as general director of the Bonner Bergwerks- und Hütten-Verein Aktiengesellschaft , founded in 1853 , an association of neighboring coal mines and alum smelters, including the Bleibtreu family. He stayed in this office until 1871 and in 1858 he founded her Bonn cement factory near Oberkassel. She obtained the limestone from Budenheim near Mainz and the clay from the surrounding area. The raw materials were transported by ships directly in front of the raw mill. The quality was so good that its cement prevailed against the English competing products and won a medal at the International Industrial Exhibition in London in 1862. It was used, among other things, for the construction of Cologne Cathedral and the Cologne Cathedral Bridge .

Hermann Bleibtreu was a member of the Society of German Natural Scientists and Doctors . In his house built in 1875 in Bonn's Weststadt (Kreuzbergweg 5), a field service of the Gestapo was located during the Nazi era ; today the Bonn Labor Court is located here .

literature

Web links

Individual evidence

  1. ↑ Carl Goslich : History of the Stettiner Portland cement factory 1855-1905. Susenbeth, Stettin 1905, pp. 1-8, ( online ).
  2. ↑ Members of the Society of German Natural Scientists and Doctors 1857
  3. ^ Entry on the former Gestapo field office in Kreuzbergweg in the database " KuLaDig " of the Rhineland Regional Association
personal data
SURNAME Stay true, Hermann
BRIEF DESCRIPTION German chemist
DATE OF BIRTH March 4, 1821
PLACE OF BIRTH Putz
DATE OF DEATH April 25, 1881
Place of death Bonn