Method for preparing zirconium tetrachloride and hafnium tetrachloride
Abstract
Abstract A METHOD FOR PREPARING ZIRCOMIUM TETRACHLORIDE HAVING A LOW HAFNIUM CONTENT AND HIGH PURITY HAFNIUM TETRACHLORIDE FROM RAW MATERIAL ZIRCUNIUM TETRACHLORIDE CONTAINING HAFNIUM TETRACHLORIDE IN A RELATIVELY LARGE AMOUNT, BY FORMING A DOUBLE SALT BETWEEN A SALT AND THE RAW MATERIAL ZIRCOMIUM TETRACHLORIDE PRESENT IN A LARGER AMOUNT THAN THAT REQUIRED FOR FORMATION OF THE DOUBLE SALT WITH THE SALT; DECOMPOSING THE RESULTING DOUBLE SALT ALLOWING VAPORS RESULTING FROM THE DECOMOPOSITION, TO REACT WITH THE SALTS AGAIN TO FORM A DOUBLE SALT, AND REPEATING THE DECOMPOSITION, FORMATION AND DECOMPOSITION OF THE DOUBLE SALT IN A MUILT-STAGE MANNER TO SEPARATE THE HAFNIUM CONTENT, TO OBTAIN ZIRCONIUM TETRACHLORIDE HAVING A LOW HAFNIUM CONTENT, AND AT THE SAME TIME CONCENTRAING THE RESULTING HALNIUM TETRACHLORIDE CONTAINED IN THE RAW MATERIAL TO OBTAIN HIGH PURITY HAFNIUM TETRACHLORIDE.
Inventors
- 👤 Hiroshi Ishizuka
Bibliographic Details
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