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Title: Method for removing sulfur oxide from waste gases and recovering elemental sulfur

Abstract

A continuous catalytic fused salt extraction process is described for removing sulfur oxides from gaseous streams. The gaseous stream is contacted with a molten potassium sulfate salt mixture having a dissolved catalyst to oxidize sulfur dioxide to sulfur trioxide and molten potassium normal sulfate to solvate the sulfur trioxide to remove the sulfur trioxide from the gaseous stream. A portion of the sulfur trioxide loaded salt mixture is then dissociated to produce sulfur trioxide gas and thereby regenerate potassium normal sulfate. The evolved sulfur trioxide is reacted with hydrogen sulfide as in a Claus reactor to produce elemental sulfur. The process may be advantageously used to clean waste stack gas from industrial plants, such as copper smelters, where a supply of hydrogen sulfide is readily available.

Inventors:
 [1]
  1. Richland, WA
Issue Date:
Research Org.:
Battelle Memorial Institute, Columbus, OH (United States)
OSTI Identifier:
862900
Patent Number(s):
4041142
Assignee:
Battelle Memorial Institute (Richland, WA)
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; removing; sulfur; oxide; waste; gases; recovering; elemental; continuous; catalytic; fused; salt; extraction; process; described; oxides; gaseous; streams; stream; contacted; molten; potassium; sulfate; mixture; dissolved; catalyst; oxidize; dioxide; trioxide; normal; solvate; remove; portion; loaded; dissociated; produce; gas; regenerate; evolved; reacted; hydrogen; sulfide; claus; reactor; advantageously; clean; stack; industrial; plants; copper; smelters; supply; readily; available; potassium sulfate; fused salt; waste gases; removing sulfur; extraction process; sulfur oxide; sulfur oxides; salt mixture; waste gas; gaseous stream; elemental sulfur; sulfur dioxide; hydrogen sulfide; sulfur trioxide; readily available; molten potassium; stack gas; sulfate salt; produce elemental; salt extraction; recovering elemental; industrial plant; gaseous streams; oxide gas; /423/

Citation Formats

Moore, Raymond H. Method for removing sulfur oxide from waste gases and recovering elemental sulfur. United States: N. p., 1977. Web.
Moore, Raymond H. Method for removing sulfur oxide from waste gases and recovering elemental sulfur. United States.
Moore, Raymond H. Sat . "Method for removing sulfur oxide from waste gases and recovering elemental sulfur". United States. https://www.osti.gov/servlets/purl/862900.
@article{osti_862900,
title = {Method for removing sulfur oxide from waste gases and recovering elemental sulfur},
author = {Moore, Raymond H},
abstractNote = {A continuous catalytic fused salt extraction process is described for removing sulfur oxides from gaseous streams. The gaseous stream is contacted with a molten potassium sulfate salt mixture having a dissolved catalyst to oxidize sulfur dioxide to sulfur trioxide and molten potassium normal sulfate to solvate the sulfur trioxide to remove the sulfur trioxide from the gaseous stream. A portion of the sulfur trioxide loaded salt mixture is then dissociated to produce sulfur trioxide gas and thereby regenerate potassium normal sulfate. The evolved sulfur trioxide is reacted with hydrogen sulfide as in a Claus reactor to produce elemental sulfur. The process may be advantageously used to clean waste stack gas from industrial plants, such as copper smelters, where a supply of hydrogen sulfide is readily available.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

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