Carl Grünzweig

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Grave of the Grünzweig family in the main cemetery in Ludwigshafen am Rhein

Carl Otto Grünzweig (born December 31, 1845 in Schorndorf , Württemberg ; † July 9, 1913 in Ludwigshafen am Rhein ) was a German chemist , entrepreneur and temporarily honorary mayor of the city of Ludwigshafen am Rhein.

Life

His parents were the pharmacist Carl Grünzweig (* 1809) and Luise Christine Grünzweig nee. Gaupp (1815–1906), the daughter of the pharmacist Gottlieb Friedrich Gaupp, who had taken over the pharmacy in 1839 after her marriage.

Carl Grünzweig was apprenticed to his father from 1861 to 1863, possibly until 1864, studied chemistry in Munich from 1866 , at the Stuttgart Polytechnic from 1867 and received his doctorate in Tübingen in 1872 with a thesis on butyric acids of various origins . In addition to chemistry, he dealt with pharmacy , botany , microscopy , mineralogy and elementary mechanics.

He then worked as an industrial chemist at the Carl Leverkus ultramarine factory in Marienberg near Bensheim .

In 1879 he married Wilhelmine Krämer (1859–1906) in Schorndorf, with whom he had four sons and a daughter, including Carl Grünzweig (1881–1932; painter) and Max.

In addition to his entrepreneurial duties, Grünzweig was a member of the city council and from 1891 to 1896 honorary mayor of Ludwigshafen am Rhein.

Factory of chemical-technical products from Grünzweig & Hartmann oHG

Grünzweig and Hartmann

On September 1, 1878, together with his friend, the merchant Paul W. Hartmann (1851–1899) from Freudenstadt, on today's Frankenthaler Strasse (or the parallel mayor-Grünzweig-Strasse) in Ludwigshafen, he founded the chemical-technical products factory Grünzweig & Hartmann oHG . In the beginning, insulating compound, putty for compacting machine parts, lye and boot wax were produced, which gave the factory the popular name Die Wichs .

In 1880 they received their first patent on cork insulation panels. Shortly thereafter, they developed the heat-resistant lightweight stone diatomite stone made of ground kieselguhr , which was in demand until the Second World War , for the insulation of boilers and buildings . This was made into a paste with water, clay, sawdust and cork flour were mixed in, pressed into molds and burned at 950 ° C.

After Hartmann's death, Grünzweig took his son Max, who had completed a degree in natural sciences, into the company. Max played a decisive role in the first construction of a tunnel or canal furnace. In 1906 they discovered that cork granulate heated without air expands many times over. Compared to natural cork, it was characterized by its lower weight, greater thermal insulation and greater resistance to moisture. By 1908, the company opened branches in Berlin , Düsseldorf , Hamburg , Dresden , Munich, Vienna and Budapest .

On October 1st, 1918, Max Grünzweig founded the Research Home for Heat Management in Munich with the support of Oskar Knoblauch . Max could only continue the company until 1919. The civil engineer Michael became the new company director . ISOVER and G + H Montage GmbH (today the G + H ISOLIERUNG group) emerged from the company .

Fonts

  • About butyric acids of various origins. Inaugural dissertation , printed by Keller, 1872. (35 pages)

literature

  • Armin Wankmüller: Pharmacist Carl Grünzweig from Schorndorf, manufacturer in Ludwigshafen ( Memento from February 21, 2014 in the Internet Archive ), p. 36.
  • Alfred Herbei: The industrialist Dr. Carl Grünzweig. A contribution to the history of the mayor of Ludwigshafen . In: Pfälzische Heimatblätter , No. 7, 1959, p. 49 f.
  • Kurt Oberdorffer: Ludwigshafener Chemiker, Volume 2. Econ-Verlag, Düsseldorf 1960.
  • Karl Seiffert: Carl Grünzweig. The life and work of the founder of the insulation industry . In: Pfälzische Heimatblätter , 8th year 1960.
  • Kraft Sachisthal: 75 years of Grünzweig & Hartmann AG Ludwigshafen / Rhein. A contribution to the history of insulation technology. 1953.

Individual evidence

  1. ^ Karl Seiffert:  Grünzweig, Carl Otto. In: New German Biography (NDB). Volume 7, Duncker & Humblot, Berlin 1966, ISBN 3-428-00188-5 , pp. 205 f. ( Digitized version ).
  2. ↑ Armin Wankmüller: Württ. Apotheker als Fabrikanten ( Memento from December 22, 2013 in the Internet Archive ) (PDF; 387 kB), accessed on January 4, 2013
  3. ^ About butyric acids of various origins. Inaugural dissertation , printed by Keller, 1872. (35 pages)
  4. ^ H. Vollmer: General Lexicon of Fine Artists of the XX. Century.
  5. ↑ Manufacturer and company records , in the Centralblatt der Bauverwaltung , No. 49, December 10, 1884, p. 526, accessed on January 4, 2013
  6. ^ Production and properties , in the Centralblatt der Bauverwaltung , No. 23, June 11, 1884, p. 239, accessed on January 4, 2013
  7. ^ G + H Isolierungen , accessed on January 4, 2013
personal data
SURNAME Grünzweig, Carl
ALTERNATIVE NAMES Grünzweig, Carl Otto
BRIEF DESCRIPTION German chemist, entrepreneur, temporarily honorary mayor of the city of Ludwigshafen am Rhein
DATE OF BIRTH December 31, 1845
PLACE OF BIRTH Schorndorf
DATE OF DEATH July 9, 1913
Place of death Ludwigshafen am Rhein