Method for preparing sponge titanium from sodium fluotitanate by aluminothermic reduction
US8864874B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Aug 14, 2012 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Jan 8, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B34/1277
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a method for preparing sponge titanium from sodium fluotitanate by aluminothermic reduction, comprising the following steps: a reaction step: aluminum and zinc are mixed under a vacuum state, and sodium fluotitanate is then added into the mixture for reaction; a separation step: the product resulting from the complete reaction stands still and is then introduced with inert gas, and NaF and AlF3 in upper-layer liquid phase are extracted; and a distillation step: Zn in the remaining product Zn—Ti is distilled out under a vacuum state, wherein the mass ratio of the aluminum to the zinc is 1:2 to 1:10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.