Meinhard Hoffmann

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Meinhard Hoffmann (born November 18, 1853 in Wiesbaden , † January 18, 1936 in Deixlfurt ) was a German chemist and manager .

Life

Meinhard Hoffmann was born on November 18, 1853 in Wiesbaden as the son of the architect Philipp Hoffmann and Klementine (* 1832, † 1893), daughter of Gottfried Stock. He devoted himself to studying chemistry at the Rheinische Friedrich-Wilhelms-University of Bonn and at the Georg-August University of Göttingen before 1876 in Göttingen with the thesis about the action of phosphorus pentachloride to substituted amides of monobasic acids to Dr. phil. PhD .

Hoffmann with Cassella in 1895 (with Leo Gans and Arthur von Weinberg)

As a result, he was in the chemical factory shortly bald tree in Berlin busy before 1879 in the Frankfurter aniline dye factory Goose & Compagnie occurred that started in 1894 as Leopold Cassella & Compagnie changed its name . Within the company, Hoffmann was given responsibility for the manufacture of basic dyes, and later the numerous new azo and sulfur dyes . He succeeded in overcoming production-related problems caused by insufficient technical equipment and insufficiently qualified personnel with technical know-how and organizational competence. Meinhard Hoffmann was appointed technical director in 1895. In 1929, the Technical University of Munich recognized his achievements with the award of an honorary doctorate (as Dr.-Ing. E. h.).

From 1908 to 1919 Meinhard Hoffmann was a member of the Kassel Municipal Parliament and the Provincial Parliament of the Hesse-Nassau Province .

Meinhard Hoffmann married Auguste (* 1854, † 1948) in Wiesbaden in 1880, a daughter of Dr. Bernhard Greiß. They had a daughter together. He died on January 18, 1936, two months after his 82nd birthday, in Deixlfurt.

Act

From 1882 Meinhard Hoffmann also began to work scientifically, for example in the field of sulphonation and nitration of naphthalene , naphthols , naphthylamines and aminonaphthols. Among other things, he succeeded in isolating 1-naphthol-4-sulfonic acid, α, α-acid and 2-naphthol-6-sulfonic acid in a simple process, the technical separation of R and G salt (β-naphthol -3,6- and 6,8-disulfonic acid). All of these substances formed valuable and important starting materials and intermediates for numerous new azo dyes.

Hoffmann achieved his greatest success in 1890 with the discovery of the H-acid named after him, 1,8-aminonaphthol-3,6-disulfonic acid, one of the largest and most valuable intermediate products in azo chemistry. Hoffmann, both as a production manager and as an inventor, contributed not only to the global reputation of the Cassella company, but also to the tremendous development of the German tar paint industry and its supremacy in the world until 1914.

Works

  • Numerous patents :
  • In: Paul Friedlaender : Advances in tar paint production 1 ff., 1888 ff .
  • In: Tabular overview of artificial organic dyes, edited by Gustav Schultz and Paul Julius, 1888 ff.
  • In: Dye tables, 2 volumes, edited by Gustav Schultz and Paul Julius, 6 te. Edition 1923, 7th. Edition 1928-31, edited by Ludwig Lehmann

literature

Web links

Individual evidence

  1. ^ Jochen Lengemann: MdL Hessen. 1808-1996. Biographical index (= political and parliamentary history of the state of Hesse. Vol. 14 = publications of the Historical Commission for Hesse. Vol. 48, 7). Elwert, Marburg 1996, ISBN 3-7708-1071-6 , p. 191.
personal data
SURNAME Hoffmann, Meinhard
BRIEF DESCRIPTION German chemist and industry manager
DATE OF BIRTH November 18, 1853
PLACE OF BIRTH Wiesbaden
DATE OF DEATH January 18, 1936
Place of death Deixlfurt