Combined process for upgrading spent alkylation acid and reducing noxious gas content of waste gaseous streams. [18 claims]
The effluent streams from utility stack gases containing nitric oxides and sulfur dioxide are sequentially oxidized, absorbed with effluent spent alkylation acid, the unabsorbed remaining gases contacted with carbon monoxide from alkylation units in refinery cracking and other industrial plants to form sulfur, carbon dioxide and nitrogen, the carbon dioxide and nitrogen being vented, the sulfur oxidized to sulfur trioxide and contacting aqueous sulfuric acid therewith to effect concentration of said acid and suitability for recycle to an alkylation unit; the absorbate containing spent alkylation acid sequentially treated with a burning, oxidation, aqueous dilution and carbon monoxide treatment steps to form sulfuric acid for recycle to an alkylation unit and venting formed carbon dioxide and nitrogen. 18 claims, 1 figure.
- Assignee:
- Texaco Development Corp.
- Patent Number(s):
- US 4014982
- OSTI ID:
- 7216239
- Country of Publication:
- United States
- Language:
- English
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Simultaneous removal of nitrogen oxides and sulfur oxides from combustion gases
Simultaneous removal of nitrogen oxides and sulfur oxides from combustion gases
Related Subjects
010800* -- Coal
Lignite
& Peat-- Waste Management
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
DENITRIFICATION
DESULFURIZATION
ELEMENTS
FLUE GAS
FLUIDS
GASEOUS WASTES
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REMOVAL
SORPTION
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES