Method of extracting iodine from liquid mixtures of iodine, water and hydrogen iodide
Abstract
The components of a liquid mixture consisting essentially of HI, water and at least about 50 w/o iodine are separated in a countercurrent extraction zone by treating with phosphoric acid containing at least about 90 w/o H3PO4. The bottom stream from the extraction zone is substantially completely molten iodine, and the overhead stream contains water, HI, H3PO4 and a small fraction of the amount of original iodine. When the water and HI are present in near-azeotropic proportions, there is particular advantage in feeding the overhead stream to an extractive distillation zone wherein it is treated with additional concentrated phosphoric acid to create an anhydrous HI vapor stream and bottoms which contain at least about 85 w/o H3PO4. Concentration of these bottoms provides phosphoric acid infeed for both the countercurrent extraction zone and for the extractive distillation zone.
- Inventors:
- Issue Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 863459
- Patent Number(s):
- 4176169
- Application Number:
- 05/921435
- Assignee:
- General Atomic Company (San Diego, CA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
- DOE Contract Number:
- AC02-80ET26225
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1978 Jul 03
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; extracting; iodine; liquid; mixtures; water; hydrogen; iodide; components; mixture; consisting; essentially; 50; separated; countercurrent; extraction; zone; treating; phosphoric; acid; containing; 90; bottom; stream; substantially; completely; molten; overhead; contains; fraction; amount; original; near-azeotropic; proportions; particular; advantage; feeding; extractive; distillation; treated; additional; concentrated; create; anhydrous; vapor; bottoms; contain; 85; concentration; provides; infeed; acid containing; stream contains; liquid mixture; overhead stream; liquid mixtures; consisting essentially; phosphoric acid; vapor stream; hydrogen iodide; substantially complete; extraction zone; mixture consisting; extractive distillation; /423/210/
Citation Formats
Mysels, Karol J. Method of extracting iodine from liquid mixtures of iodine, water and hydrogen iodide. United States: N. p., 1979.
Web.
Mysels, Karol J. Method of extracting iodine from liquid mixtures of iodine, water and hydrogen iodide. United States.
Mysels, Karol J. Mon .
"Method of extracting iodine from liquid mixtures of iodine, water and hydrogen iodide". United States. https://www.osti.gov/servlets/purl/863459.
@article{osti_863459,
title = {Method of extracting iodine from liquid mixtures of iodine, water and hydrogen iodide},
author = {Mysels, Karol J.},
abstractNote = {The components of a liquid mixture consisting essentially of HI, water and at least about 50 w/o iodine are separated in a countercurrent extraction zone by treating with phosphoric acid containing at least about 90 w/o H3PO4. The bottom stream from the extraction zone is substantially completely molten iodine, and the overhead stream contains water, HI, H3PO4 and a small fraction of the amount of original iodine. When the water and HI are present in near-azeotropic proportions, there is particular advantage in feeding the overhead stream to an extractive distillation zone wherein it is treated with additional concentrated phosphoric acid to create an anhydrous HI vapor stream and bottoms which contain at least about 85 w/o H3PO4. Concentration of these bottoms provides phosphoric acid infeed for both the countercurrent extraction zone and for the extractive distillation zone.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}