Hans Alexander (chemist)

from Wikipedia, the free encyclopedia

Hans Alexander (born November 5, 1865 in Breslau ; died after 1935 ) was a German chemist who, among other things, developed a special process for galvanizing iron goods with an aluminum or magnesium-containing zinc coating. Since 1890 he also had the patent for the galvanic deposition of zinc, copper and nickel and was the founder of the electrochemical laboratory for the metal industry in Berlin.

Life

He was the son of the merchant and banker Johann Alexander and his wife Jenny. His ancestors were the founders of a bank in Breslau and the wool wholesaler of the Alexander Brothers in Breslau in 1833.

Hans Alexander attended the St. Maria Magdalena grammar school in Breslau, where he graduated from high school in 1884. He then studied chemistry at the Universities of Freiburg im Breisgau , Breslau and Leipzig . He received his PhD in 1889 in Leipzig for Dr. phil. about phenyl malic acid. In addition, he worked on the synthesis of conhydrin . He then worked from 1889 to 1893 as a scientific assistant to the newly appointed chemistry professor Albert Ladenburg at the University of Breslau. He then moved to Berlin to the Electrochemical Laboratory for the Metal Industry , which he founded , in order to further develop a process he had worked out for the electrolytic galvanizing of iron in industry and to make it applicable in practice.

From 1898 to 1900 Hans Alexander worked as a scientific assistant at the Technical University of Charlottenburg a . a. worked for Georg Karl von Knorre , to whom he assisted in his lectures on gas analysis. Between 1900 and 1910 Alexander wrote an annual column on progress in the field of gasometry or gas measurement and gas analysis for the Chemiker-Zeitung , in which he lectured on the most important developments of the previous year.

In 1901, Hans Alexander was a co-founder and later chairman of the Märkisches Bezirksverein des Verein Deutscher Chemiker . When he could no longer be elected chairman in accordance with the statutes in 1918, he was made an honorary member of the association. He later took over the actual chairmanship again. On the occasion of the 25th anniversary of the Märkisches Bezirksverein, he arranged for the publication of a special issue of the journal for applied chemistry in 1926 . By 1929 at the latest, the Märkische Bezirksverein was merged into the Greater Berlin and Mark District Association and Hans Alexander resigned from the chair. In addition, Hans Alexander was on the board of directors of the Association of Independent Public Chemists. He was a member of the German Chemical Society , the Father's Women's Association and the Association for Youth Care.

In his free time, Hans Alexander promoted allotment gardening. He was a full member of the allotment gardening council in the Prussian Ministry for People's Welfare, which was dissolved in 1932 .

Fonts (selection)

  • About phenyl malic acid and some other derivatives of phenyl succinic acid , Breslau, Hoyer & Comp., 1889.
  • About phenyl malic acids. Justus Liebigs Annalen der Chemie, Volume 258 No. 1, pp. 67-86, doi: 10.1002 / jlac.18902580104 .
  • Attempt a synthesis of the conhydrin , reports of the German Chemical Society, Volume 23, Verlag Chemie, 1890 ( review ).
  • Reduction of the coumarone . Reports of the German Chemical Society, Volume 25, No. 2, 1892, pp. 2409-2411, doi: 10.1002 / cber.18920250236 .
  • Effect of formaldehyde on orthodimethyltoluidine. Reports of the German Chemical Society, Volume 25, Issue 2, 1892, P. 2408, doi: 10.1002 / cber.18920250235 .
  • About the alleged decomposition of sulfur. Zeitschrift für Elektrochemie, Volume 5, Issue 8, 1898, pp. 93-95, doi: 10.1002 / bbpc.18980050802 .
  • On the action of acetylene on copper. Reports of the German Chemical Society. Volume 32, Issue 2, 1899, pp. 2381-2384, doi: 10.1002 / cber.189903202179 .

literature

Web links

Individual evidence

  1. ^ Oesterreichisches Patentblatt, Volume 1, 1899, p. 29.
  2. ↑ The laboratory was last located in Berlin NW 6, Luisenstrasse 21.
  3. ↑ Advances in the field of gasometry or gas measurement and gas analysis . Chem.-Ztg .: 24: 515-519, (1900); 25: 999-1002 (1901); 26: 781-786 (1902); 27: 547-553 (1903); 28: 492-498 (1904); 29: 817-820 (1905); 30: 657-659 (1906); 32: 801-802,817-819 (1908); 34: 929-931, 938-940, 947-948 (1910)
  4. ↑ Ed. Moser: Again: “Glass-like meltable porcelain”. In: Journal for Applied Chemistry. 32, 1919, pp. 231-232, doi: 10.1002 / anie.19190325804 .
  5. ^ Hans Alexander: 25 years of Märkischer Bezirksverein. In: Angewandte Chemie , Volume 29, 1926, p. 1423
  6. ^ Hans Alexander: 25 years of Märkischer Bezirksverein. In: Journal for Applied Chemistry. 39, 1926, pp. 1421 ff., Doi: 10.1002 / ange.19260394702 .
personal data
SURNAME Alexander, Hans
BRIEF DESCRIPTION German chemist
DATE OF BIRTH November 5, 1865
PLACE OF BIRTH Wroclaw
DATE OF DEATH after 1935