Process for reduction of zirconium, hafnium or titanium using a zinc or tin seal
US4637831A · kind A · utility
11Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1985 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | May 30, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This is a method for reduction of chlorides of zirconium, hafnium or titanium, and provides a practical method of removing the product metal from the reduction vessel. A seal metal layer is used at the bottom of the vessel. The upper portion of the seal metal layer is liquid and the lower portion is solid. Product metal settles into the liquid portion. Product metal in a matrix of solid seal metal is withdrawn from the bottom of the vessel. Seal metal is predominantly either zinc or tin. Either pure zinc or tin or zinc or tin alloyed with product metal can be recycled to the bottom of the reduction vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.