Process for the high pressure degassing of hydrogen sulfide from liquid sulfur
AssigneeGoar, Allison & Associates, Inc.
InventorElmo Nasato
Life of this patent
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Abstract
Disclosed is a process for degassing liquid sulfur under pressure. A stream of liquid sulfur containing polysulfides and hydrogen sulfide and a stream of an oxidizing gas are introduced into a vessel and intimately mixed to provide intimate contact between the two streams. The streams are passed through the vessel at a pressure of at least about 40 psig and at a temperature and for a residence time sufficient to remove substantially all of the polysulfides and hydrogen sulfide from the liquid sulfur.
Claims37
A process for degassing liquid sulfur containing polysulfides and hydrogen sulfide comprising the steps of:
- introducing under pressure a stream of liquid sulfur containing polysulfides and hydrogen sulfide and a stream of an oxidizing gas into a vessel;
- mixing the liquid stream and the gas stream to provide intimate contact between the two streams;
- passing the two streams while in intimate contact with one another through the vessel while maintaining a pressure of at least about 40 psig, at a temperature and for a treatment time sufficient to remove substantially all of the polysulfides and hydrogen sulfide from the liquid sulfur and to produce a stream of degassed liquid sulfur and a stream of gas;
- and
- discharging the thus degassed liquid sulfur from the vessel.
A process for degassing liquid sulfur containing polysulfides and hydrogen sulfide comprising the steps of:
- introducing under pressure a stream of liquid sulfur containing polysulfides and hydrogen sulfide and a stream of air or oxygen-enriched air into a vessel containing a static mixing device for intimately mixing the two streams and a catalyst for promoting the oxidation of the polysulfides and hydrogen sulfide to elemental sulfur;
- passing the streams through the static mixing device counter-currently, co-currently, or in a cross flow while maintaining a pressure of from about 55 to about 75 psig and at a temperature from about 265.degree. F. to about 285.degree. F. and for a treatment time less than about thirty minutes to produce a degassed liquid sulfur stream containing less than about 10 ppmw total hydrogen sulfide content and a stream of gas;
- and
- discharging the thus degassed liquid sulfur from the vessel.
A process for degassing liquid sulfur containing polysulfides and hydrogen sulfide comprising the steps of:
- introducing under pressure a stream of liquid sulfur containing polysulfides and hydrogen sulfide and a stream of an oxidizing gas into a vessel containing a static mixing device and a bed of a Claus or Claus-type catalyst;
- counter-currently passing the streams through the static mixing device while maintaining a pressure of from about 65 to about 75 psig and a temperature from about 265.degree. F. to about 285.degree. F., for a treatment time of from about 5 to about 20 minutes to produce a degassed liquid sulfur stream containing less than about 30 ppmw total hydrogen sulfide content and a stream of gas;
- and
- discharging the thus degassed liquid sulfur from the vessel.
Dependencies are inferred from the claim text.