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Title: Recovery of hydrogen iodide

Abstract

A method is described for extraction of HI from an aqueous solution of HI and I[sub 2]. HBr is added to create a two-phase liquid mixture wherein a dry phase consists essentially of HBr, I and HI and is in equilibrium with a wet phase having a far greater HBr:HI ratio. Using a countercurrent extractor, two solutions can be obtained: a dry HBr--HI--I[sub 2] solution and a wet essentially HBr solution. The dry and wet phases are easily separable, and HI is recovered from the dry phase, after first separating I[sub 2], as by distillation. Alternatively, the HI-HBr liquid mixture is treated to catalytically decompose the HI. HBr is recovered from the wet phase by suitable treatment, including high-pressure distillation, to produce an H[sub 2]O--HBr azeotrope that is not more than 25 mole percent HBr. The azeotrope may be returned for use in an earlier step in the overall process which results in the production of the aqueous solution of HI and I[sub 2] without major detriment because of the presence of HBr. 1 fig.

Inventors:
Issue Date:
Research Org.:
General Atomics
OSTI Identifier:
7004292
Patent Number(s):
4396591 A
Application Number:
PPN: US 6-379363
Assignee:
GA Technologies Inc., San Diego, CA (United States) CHO; EDB-94-124751
DOE Contract Number:  
AC02-80ET26225
Resource Type:
Patent
Resource Relation:
Patent File Date: 18 May 1982
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; HYDRIODIC ACID; EXTRACTION; DECOMPOSITION; HYDROBROMIC ACID; IODINE; BROMINE COMPOUNDS; CHEMICAL REACTIONS; ELEMENTS; HALOGEN COMPOUNDS; HALOGENS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; IODINE COMPOUNDS; NONMETALS; SEPARATION PROCESSES; 400105* - Separation Procedures

Citation Formats

Norman, J.H. Recovery of hydrogen iodide. United States: N. p., 1983. Web.
Norman, J.H. Recovery of hydrogen iodide. United States.
Norman, J.H. Tue . "Recovery of hydrogen iodide". United States.
@article{osti_7004292,
title = {Recovery of hydrogen iodide},
author = {Norman, J.H.},
abstractNote = {A method is described for extraction of HI from an aqueous solution of HI and I[sub 2]. HBr is added to create a two-phase liquid mixture wherein a dry phase consists essentially of HBr, I and HI and is in equilibrium with a wet phase having a far greater HBr:HI ratio. Using a countercurrent extractor, two solutions can be obtained: a dry HBr--HI--I[sub 2] solution and a wet essentially HBr solution. The dry and wet phases are easily separable, and HI is recovered from the dry phase, after first separating I[sub 2], as by distillation. Alternatively, the HI-HBr liquid mixture is treated to catalytically decompose the HI. HBr is recovered from the wet phase by suitable treatment, including high-pressure distillation, to produce an H[sub 2]O--HBr azeotrope that is not more than 25 mole percent HBr. The azeotrope may be returned for use in an earlier step in the overall process which results in the production of the aqueous solution of HI and I[sub 2] without major detriment because of the presence of HBr. 1 fig.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {8}
}