Van Arkel–de Boer process

Crystallization
Crystallization
Fundamentals
	Crystal; Crystal structure; Nucleation;
Concepts
	Crystallization; Crystal growth; Recrystallization; Seed crystal; Protocrystalline; Single crystal;
Methods and technology
	Boules; Bridgman–Stockbarger method; Van Arkel–de Boer process; Czochralski method; Epitaxy; Flux method; Fractional crystallization; Fractional freezing; Hydrothermal synthesis; Kyropoulos method; Laser-heated pedestal growth; Micro-pulling-down; Shaping processes in crystal growth; Skull crucible; Verneuil method; Zone melting;

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. 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.

This process was superseded commercially by the Kroll process.

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