Process and apparatus for preparing sulfur trioxide from sulfur dioxide
AssigneeMesser Industries USA, Inc.
InventorsGuisu Liu, Blake Stapper
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Abstract
A process for the catalytic conversion of sulfur dioxide to sulfur trioxide to increase sulfuric acid regeneration from a spent sulfuric acid stream or other sulfur-containing stream includes replacing at least a portion of the atmospheric air typically used to oxidize sulfur dioxide to sulfur trioxide with oxygen by introducing oxygen-enriched air and/or pure oxygen feed streams into the process. A related apparatus for use in the process is also provided for catalytic conversion of sulfur dioxide to sulfur trioxide.
Claims25
A process for converting sulfur dioxide to sulfur trioxide, comprising:
- (a) introducing a sulfur dioxide feed stream into a catalytic converter for converting sulfur dioxide to sulfur trioxide;
- (b) introducing an oxygen-enriched feed stream, a pure oxygen feed stream, or both the oxygen-enriched feed stream and the pure oxygen feed stream into the catalytic converter;
- and
- (c) catalytically oxidizing at least a portion of the sulfur dioxide from the sulfur dioxide feed stream for producing sulfur trioxide.
An apparatus for converting sulfur dioxide to sulfur trioxide, comprising
- a housing;
- an inlet for the housing for supplying a sulfur dioxide-containing feed into the housing;
- at least one catalytic region positioned in the housing for converting sulfur dioxide to sulfur trioxide;
- and
- at least one inlet for supplying a feed stream of an oxygen-enriched combustion air or a feed stream of pure oxygen into the sulfur dioxide-containing feed.
Dependencies are inferred from the claim text.