Karl Heumann (chemist)

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Karl Heumann (born September 10, 1850 in Darmstadt , † August 5, 1894 in Zurich ) was a German chemist .

Life and achievement

Karl Heumann was the son of the doctor Adolph Heumann and his wife Therese Christiane Emilie, née Beck. Karl Heumann attended the Polytechnic School in Darmstadt, then he studied chemistry in Heidelberg and Berlin until 1873 . Between 1874 and 1877 he worked as a private lecturer at the Polytechnic School in Darmstadt. In 1877 he moved to the Eidgenössisches Polytechnikum in Zurich as a private lecturer in technical and theoretical chemistry , where he worked until 1894. In 1878 he received a titular professorship . In the same year Karl Heumann married Mathilde Siegfrieden, the daughter of a court lawyer.

In 1888 Karl Heumann published the first volume of a planned comprehensive presentation of the manufacture of tar paint . In Zurich in 1890 he developed a synthesis process for indigo , based on N-phenylglycine , which he was later able to improve in a second synthesis process. The patents for the two synthesis processes were acquired from BASF and Hoechst . From this, BASF developed the first large-scale process for the synthetic production of indigo. This enabled the company to bring the first synthetic indigo onto the market in 1897 with “Indigo pure BASF”. Rudolf Knietsch (BASF) and Johannes Pfleger ( Degussa ) were able to significantly improve the first indigo manufacturing process according to Heumann .

literature

Web links

Individual evidence

  1. ↑ a b Thomas Fuchs: Heumann, Karl. In: Historical Lexicon of Switzerland .
  2. ↑ Werner Abelshauser: The BASF. A company history, Munich 2002, p. 74 f.
personal data
SURNAME Heumann, Karl
BRIEF DESCRIPTION German chemist
DATE OF BIRTH September 10, 1850
PLACE OF BIRTH Darmstadt
DATE OF DEATH August 5, 1894
Place of death Zurich