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Title: Process for oxidation of hydrogen halides to elemental halogens

Abstract

An improved process for generating an elemental halogen selected from chlorine, bromine or iodine, from a corresponding hydrogen halide by absorbing a molten salt mixture, which includes sulfur, alkali metals and oxygen with a sulfur to metal molar ratio between 0.9 and 1.1 and includes a dissolved oxygen compound capable of reacting with hydrogen halide to produce elemental halogen, into a porous, relatively inert substrate to produce a substrate-supported salt mixture. Thereafter, the substrate-supported salt mixture is contacted (stage 1) with a hydrogen halide while maintaining the substrate-supported salt mixture during the contacting at an elevated temperature sufficient to sustain a reaction between the oxygen compound and the hydrogen halide to produce a gaseous elemental halogen product. This is followed by purging the substrate-supported salt mixture with steam (stage 2) thereby recovering any unreacted hydrogen halide and additional elemental halogen for recycle to stage 1. The dissolved oxygen compound is regenerated in a high temperature (stage 3) and an optical intermediate temperature stage (stage 4) by contacting the substrate-supported salt mixture with a gas containing oxygen whereby the dissolved oxygen compound in the substrate-supported salt mixture is regenerated by being oxidized to a higher valence state.

Inventors:
 [1]
  1. (Middleton, WI)
Issue Date:
Research Org.:
BATTELLE MEMORIAL INSTITUTE
OSTI Identifier:
868150
Patent Number(s):
5084264
Assignee:
Battelle Memorial Institute (Richland, WA) PNNL
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; oxidation; hydrogen; halides; elemental; halogens; improved; generating; halogen; selected; chlorine; bromine; iodine; corresponding; halide; absorbing; molten; salt; mixture; sulfur; alkali; metals; oxygen; metal; molar; ratio; dissolved; compound; capable; reacting; produce; porous; relatively; inert; substrate; substrate-supported; thereafter; contacted; stage; maintaining; contacting; elevated; temperature; sufficient; sustain; reaction; gaseous; product; followed; purging; steam; recovering; unreacted; additional; recycle; regenerated; optical; intermediate; gas; containing; whereby; oxidized; valence; temperature stage; oxygen compound; dissolved oxygen; hydrogen halides; inert substrate; elemental halogen; relatively inert; salt mixture; molar ratio; hydrogen halide; improved process; gas containing; alkali metal; elevated temperature; molten salt; temperature sufficient; alkali metals; containing oxygen; compound capable; produce elemental; elemental halogens; intermediate temperature; /423/

Citation Formats

Lyke, Stephen E. Process for oxidation of hydrogen halides to elemental halogens. United States: N. p., 1992. Web.
Lyke, Stephen E. Process for oxidation of hydrogen halides to elemental halogens. United States.
Lyke, Stephen E. Wed . "Process for oxidation of hydrogen halides to elemental halogens". United States. https://www.osti.gov/servlets/purl/868150.
@article{osti_868150,
title = {Process for oxidation of hydrogen halides to elemental halogens},
author = {Lyke, Stephen E.},
abstractNote = {An improved process for generating an elemental halogen selected from chlorine, bromine or iodine, from a corresponding hydrogen halide by absorbing a molten salt mixture, which includes sulfur, alkali metals and oxygen with a sulfur to metal molar ratio between 0.9 and 1.1 and includes a dissolved oxygen compound capable of reacting with hydrogen halide to produce elemental halogen, into a porous, relatively inert substrate to produce a substrate-supported salt mixture. Thereafter, the substrate-supported salt mixture is contacted (stage 1) with a hydrogen halide while maintaining the substrate-supported salt mixture during the contacting at an elevated temperature sufficient to sustain a reaction between the oxygen compound and the hydrogen halide to produce a gaseous elemental halogen product. This is followed by purging the substrate-supported salt mixture with steam (stage 2) thereby recovering any unreacted hydrogen halide and additional elemental halogen for recycle to stage 1. The dissolved oxygen compound is regenerated in a high temperature (stage 3) and an optical intermediate temperature stage (stage 4) by contacting the substrate-supported salt mixture with a gas containing oxygen whereby the dissolved oxygen compound in the substrate-supported salt mixture is regenerated by being oxidized to a higher valence state.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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