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US 4,457,812 AGranted
Critical solvent separations in inorganic systems
AssigneeKerr-McGee Chemical Corporation
InventorTheodore A. Rado
Life of this patent
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Abstract
A process for separating inorganic substances involving their abstraction from a mixture with near-supercritical inorganic fluids. One or more inorganic substances are abstracted and then separatively recovered by retrograde condensations. The process particularly is applicable with mixtures obtained from the chlorination of metalliferous ores and may be conjoined to many ancillary metal abstraction processes such as volatilizations, distillations or electrolyses.
Claims35
A process for separating metallic halides from a mixture comprising metallic halides, the process comprising:
- contacting said mixture with a near-supercritical inorganic fluid having a critical temperature between about 100 degrees centigrade and about 500 degrees centigrade and comprising the same halide as the metallic halides to be separated from the mixture and preferentially taking up at least one metallic halide at the contacting conditions of near-supercritical temperature and pressure such that the near-supercritical inorganic fluid takes up at least a portion of at least one metallic halide forming a near-supercritical fluid phase;
- segregating the near-supercritical fluid phase from any of the mixture not taken up by the near-supercritical fluid while still maintaining aforesaid near-supercritical conditions;
- and
- separating at least a portion of at least one of said taken-up metallic halides from the near-supercritical fluid phase.
1 more element
Dependencies are inferred from the claim text.