MANUFACTURE OF ZIRCONIUM OXIDE FROM ZIRCON
Patent
·
OSTI ID:4155077
A process is given for manufacturing phosphorus-free ZrO/sub 2/ from zircon ore. The process comprises calcining a mixture of the ore and Na/sub 2/CO/ sub 3/ or K/sub 2/CO/sub 3/, extracting the phosphorus from the alkali metal zirconyl silicate by NaOH or KOH, converting the zirconyl silicate into ZrOCl/sub 2/ by HCl treatment, and converting ZrOCl/sub 2/ into ZrO/sub 2/ by H/sub 2/SO/ sub 4/ precipitation and calcination of the precipitate. When ZrO/sub 2/ prepared in this way is used to make blue ceramic stains, the resulting color is a turquoise blue as compared with the mauvish shade obtained when phosphorus- contaminated ZrO/sub 2/ is used. (D.L.C.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-001705
- Assignee:
- Associated Lead Manufacturers Ltd.
- Patent Number(s):
- US 3109704
- OSTI ID:
- 4155077
- Country of Publication:
- United States
- Language:
- English
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