Van Arkel
   HOME





Van Arkel
Van Arkel may refer to: Chemistry * Van Arkel–de Boer process * Van Arkel–Ketelaar triangle People *A medieval noble family in the County of Holland founded around 1000 AD near Arkel and lasting until 1412 AD. Their fief was called Land van Arkel. Other people with this surname include: *Anton Eduard van Arkel (1893–1976), Dutch chemist * Frederique van Arkel (born 2000), Dutch cricketer *Gerrit van Arkel (1858–1918), Dutch architect *Heleen Van Arkel-de Greef (born 1965), Dutch chess master *Maria van Arkel Maria van Arkel (c. 1385 – 19 July 1415) was the only daughter and heiress of Lord John V of Arkel and Joanna of Jülich. She inherited the title to Gelderland from her maternal uncle, Duke Reginald IV, and her son became Arnold, Duke of Gelder ... (c.1385–1415), Dutch noblewoman {{disambiguation, geo, surname Dutch-language surnames Surnames of Dutch origin ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  


picture info

Van Arkel–de Boer Process
The van Arkel–de Boer process, also known as the iodide process or crystal-bar process, was the first industrial process for the commercial production of pure ductile titanium, zirconium and some other metals. It was developed by Anton Eduard van Arkel and Jan Hendrik de Boer in 1925 for Philips Nv. Now, it is used in the production of small quantities of ultrapure titanium and zirconium. It primarily involves the formation of the metal iodides and their subsequent decomposition to yield pure metal, for example, at one of the Allegheny Technologies' Albany plants. This process was superseded commercially by the Kroll process (based on the reduction of titanium tetrachloride by metallic magnesium). Process As seen in the diagram, impure titanium, zirconium, hafnium, vanadium, thorium or protactinium is heated in an evacuated vessel with a halogen at 50–250 °C. The patent specifically involved the intermediacy of titanium tetraiodide, TiI4 and zirconium tetraiodide, Zr ...
[...More Info...]      
[...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  



MORE