Jean Hellot
Jean Hellot (born November 20, 1685 in Paris , † February 15, 1766 there ) was a French chemist. He was a pioneer in French industrial chemistry.
Hellot originally wanted to be a clergyman, but then turned to chemistry and studied with Étienne François Geoffroy in Paris. From 1718 to 1732 he published the Gazette de France . After a study trip to England he became inspector general of the French dye works in 1740. From 1751 he was an advisor to the porcelain factory in Sèvres.
He wrote a textbook on dyeing and dye chemistry, which was a standard work in his day. Hellot also dealt with many other areas of the chemical industry (production of sulfuric acid, production of phosphorus from urea, after he published the process of Hennig Brand in 1737 , Glauber's salt, metallurgy).
In 1735 he discovered sodium phosphate . He discovered that burnt clay is not attacked by acids and that zinc in sulfuric acid forms a colorless vitriol ( zinc sulfate ), which when heated gives a white powder. He studied zinc compounds and diethyl ether .
He invented invisible inks based on cobalt and silver salts.
He was a member of the Académie des Sciences in Paris. In 1740 he became a Fellow of the Royal Society .
Fonts
- L'art de la teinture des laines et des étoffes de laine en grand et petit complexion. Avec instructions sur les debonilles, 1750.
literature
- Winfried R. Pötsch (lead), Annelore Fischer, Wolfgang Müller: Lexicon of important chemists , Harri Deutsch 1989, p. 195
Individual evidence
- ^ Jean Hellot: Seconde partie du mémoire sur l'encre sympathique ou teinture . Extraite des Mines de Bismuth, d'Azur and d'Arsenic. In: Académie des sciences (ed.): Histoire de l'Académie royale des sciences avec les mémoires de mathématique & de physique . 1737, p. 228–247 (French, online at Gallica Bibliothèque nationale de France ).
- ^ List of members since 1666: Letter H. Académie des sciences, accessed on November 26, 2019 (French).
| personal data | |
|---|---|
| SURNAME | Hellot, Jean |
| BRIEF DESCRIPTION | French chemist |
| DATE OF BIRTH | November 20, 1685 |
| PLACE OF BIRTH | Paris |
| DATE OF DEATH | February 15, 1766 |
| Place of death | Paris |