Gottlieb Kirchhoff

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Gottlieb Sigismund Kirchhoff
Born (1764-02-19)19 February 1764
Teterow, Mecklenburg-Schwerin
Died 14 February 1833(1833-02-14) (aged 68)
Saint Petersburg, Russian Empire
Residence Russia
Known for

Hydrolysis of starch into a sugar.


Refining vegetable oil.
Scientific career
Fields Chemistry

Gottlieb Sigismund Constantin Kirchhoff (19 February 1764 – 14 February 1833) was a German chemist. In 1811 he became the first person to convert starch into a sugar (corn syrup), by heating it with sulfuric acid.[1] This sugar was eventually named glucose.[2] He also developed a method of refining vegetable oil, and established a factory that prepared two tons of refined oil a day.[2]

Since the sulfuric acid was not consumed, it was an early example of a catalyst. (A term that Jöns Jacob Berzelius would later coin.)

References[edit]

  1. ^ See:
    • Scherer (1811) "Kirchof's entdeckte Zubereitung des Zuckers und Syrups aus Buchweizen" (Kirchhoff's discovery of a preparation of sugar and syrup from buckwheat), Bulletin des Neuesten und Wissenwürdigsten aus der Naturwissenschaft … (Bulletin of the most recent and most useful to know [news] from science … ), 9 : 262–263.
    • Kirchhoff (1811) Mémoires de l'Académie impériale des sciences de St. Pétersbourg, 4 : 27. From page 27: "Mr. l'Adjoint Kirchhoff présenta à la Conférence trois flacons, contenans: 1°) du Sirop produit par l'art dans quelques végétaux (la pomme de terre, le froment et le blé noir ou Sarazin), … " (Assistant [professor] Kirchhoff presented to the conference three bottles, containing: (1) syrup produced artificially from some vegetables (potato, wheat and buckwheat or Sarazin), … )
    • (Editor) (1812) "Die Verfertigung des Zuckers aus Buchweizen- und andere Mehlarten" (The manufacture of sugar from buckwheat and other flours), Bulletin des Neuesten und Wissenwürdigsten aus der Naturwissenschaft … , 10 : 88–89.
    • Кирхгоф, К. С. [Kirchhoff, C. S.] (1812) "О приготовлении сахара из крахмала" [O prigotovlenii sakhara iz krakhmala, "On the preparation of sugar from starch"], Технологический журнал [Tekhnologichesky zhurnal, Technology magazine], 9 (1) : 3–26.
  2. ^ a b Asimov, Asimov's Biographical Encyclopedia of Science and Technology 2nd Revised edition