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Title: 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 H.sub.3 PO.sub.4. The bottom stream from the extraction zone is substantially completely molten iodine, and the overhead stream contains water, HI, H.sub.3 PO.sub.4 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 H.sub.3 PO.sub.4. Concentration of these bottoms provides phosphoric acid infeed for both the countercurrent extraction zone and for the extractive distillation zone.

Inventors:
 [1]
  1. La Jolla, CA
Issue Date:
Research Org.:
General Atomics, San Diego, CA (United States)
OSTI Identifier:
863459
Patent Number(s):
4176169
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
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 H.sub.3 PO.sub.4. The bottom stream from the extraction zone is substantially completely molten iodine, and the overhead stream contains water, HI, H.sub.3 PO.sub.4 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 H.sub.3 PO.sub.4. 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}
}

Patent:

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