Treatment of spent caustic refinery effluents
AssigneesShaw Liquid Solutions LLC., GEI Liquid Solutions LLC.
InventorsBernard F. Duesel, Jr., John P. Gibbons, Michael J. Rutsch
Life of this patent
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Abstract
In the methods for treatment of caustic effluents described in the specification, a spent caustic refinery effluent is supplied to a submerged combustion gas evaporator in which hot combustion gas containing carbon dioxide is injected into the caustic liquid to concentrate the liquid and convert a hydroxide constituent to a carbonate. Where the caustic effluent is from a petroleum refinery, oil in the waste liquid is separated from the aqueous constituent before, during or after concentration.
Claims24
A method for treating caustic effluents comprising:
- supplying a caustic effluent to a submerged combustion gas evaporator;
- and
- supplying combustion gas to the submerged combustion gas evaporator at a temperature and quantity high enough to vaporize water and volatile constituents in the caustic effluent and concentrate a constituent of the caustic effluent,
- wherein the combustion gas supplied to the submerged combustion gas evaporator contains carbon dioxide and including the step of reacting the carbon dioxide with a caustic constituent of the caustic effluent to convert the caustic constituent to a carbonate, thereby sequestering carbon dioxide from the combustion gas.
A method for treating caustic materials comprising supplying a caustic solution which has a sodium hydroxide equivalency in a range from about one percent to about fifty percent to a submerged combustion gas evaporator and supplying combustion gas which contains carbon dioxide to the combustion gas evaporator and wherein the carbon dioxide reacts with the caustic solution to convert a hydroxide constituent thereof to a carbonate, thereby sequestering carbon dioxide from the combustion gas.
A method for treating caustic effluents comprising:
- supplying a caustic effluent to a submerged combustion gas evaporator;
- and
- supplying combustion gas to the submerged combustion gas evaporator at a temperature and quantity high enough to vaporize water and volatile constituents in the caustic effluent and concentrate a constituent of the caustic effluent,
- wherein supplying a caustic effluent to a submerged combustion gas evaporator includes supplying a sulfidic caustic effluent to the submerged combustion gas evaporator.
A method for treating caustic effluents comprising:
- supplying a caustic effluent to a submerged combustion gas evaporator;
- and
- supplying combustion gas to the submerged combustion gas evaporator at a temperature and quantity high enough to vaporize water and volatile constituents in the caustic effluent and concentrate a constituent of the caustic effluent,
- wherein supplying a caustic effluent to a submerged combustion gas evaporator includes supplying a cresylic caustic effluent to the submerged combustion gas evaporator.
A method for treating caustic effluents comprising:
- supplying a caustic effluent to a submerged combustion gas evaporator;
- and
- supplying combustion gas to the submerged combustion gas evaporator at a temperature and quantity high enough to vaporize water and volatile constituents in the caustic effluent and concentrate a constituent of the caustic effluent,
- wherein supplying a caustic effluent to a submerged combustion gas evaporator includes supplying a napthenic caustic effluent to the combustion gas evaporator.
A method for treating caustic effluents comprising:
- supplying a caustic effluent to a submerged combustion gas evaporator;
- and
- supplying combustion gas to the submerged combustion gas evaporator at a temperature and quantity high enough to vaporize water and volatile constituents in the caustic effluent and concentrate a constituent of the caustic effluent,
- wherein supplying a caustic effluent to a submerged combustion gas evaporator includes supplying any combination of sulfidic, cresylic and napthenic caustic effluents to the combustion gas evaporator.
A method for treating caustic effluents comprising:
- supplying a caustic effluent to a submerged combustion gas evaporator;
- supplying combustion gas to the submerged combustion gas evaporator at a temperature and quantity high enough to vaporize water and volatile constituents in the caustic effluent and concentrate a constituent of the caustic effluent;
- and
- sequestering at least some carbon dioxide from the combustion gas by converting a caustic effluent constituent from a hydroxide to a carbonate.
A method for treating caustic effluents comprising:
- supplying a caustic effluent to a submerged combustion gas evaporator;
- supplying combustion gas to the submerged combustion gas evaporator at a temperature and quantity high enough to vaporize water and volatile constituents in the caustic effluent and concentrate a constituent of the caustic effluent;
- and
- stripping at least some volatile compounds from the caustic effluent in an air stripper prior to supplying the caustic effluent to the evaporator and supplying air from the air stripper containing volatile compounds to a burner used to produce the combustion gas.
Dependencies are inferred from the claim text.