Peter Jacob Hjelm

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Peter Jacob Hjelm
Born(1746-10-02)2 October 1746
Died7 October 1813(1813-10-07) (aged 67)
Alma materUniversity of Uppsala

Peter (Petter) Jacob Hjelm (2 October 1746 – 7 October 1813) was a Swedish chemist and the first person to isolate the element molybdenum in 1781, four years after its discovery by Swedish chemist Carl Wilhelm Scheele.[1][2]


Hjelm was born at Sunnerbo in Småland, Sweden. He was raised in the parish of Göteryd in Älmhult, the son of parish priest Erik Hjelm and Cecilia Cecilia Gistrénia.[3]

After his studies at the University of Uppsala, he received his Ph.D. He became professor at the Mining academy and in 1782 he became head of the Royal Mint . From 1784 on he was a member of the Royal Swedish Academy of Sciences. His last position director of the Chemical Laboratory at the Ministry of Mining.[4] [5]


  1. ^ P. J. Hjelm (1788). "Versuche mit Molybdäna, und Reduction der selben Erde". svenska vetensk. Academ. Handlingar. 49: 268.
  2. ^ "Carl Wilhelm Scheele". Soylent Communications. Retrieved December 1, 2018.
  3. ^ "Hjelm, Petter Jakob". Nordisk familjebok. Retrieved December 1, 2018.
  4. ^ Association, IMOA International Molybdenum. "Molybdenum history". Retrieved 11 July 2018.
  5. ^ "Hjelm, Peter Jakob". Svenskt biografiskt handlexikon. Retrieved December 1, 2018.


  • Friedrich, Christoph (1989). "Deutsch-schwedische Wissenschaftsbeziehungen an der Universität Greifswald zwischen 1770 und 1850 unter besonderer Berücksichtigung von Chemie und Pharmazie". Berichte zur Wissenschaftsgeschichte. 12 (3): 177–192. doi:10.1002/bewi.19890120307. PMID 11629776.