Process for removing H/sub 2/S and CO/sub 2/ from gases and regenerating the adsorbing solution

Patent · Tue Jul 31 04:00:00 EDT 1979

OSTI ID:6801046

Dezael, C; Deschamps, A; Franckowiak, S

An improved process is proposed for regenerating aqueous ammonium, sodium, and potassium hydroxide solutions commonly used to remove hydrogen sulfide from tail gases at natural gas treatment plants. Unlike previous methods, the process selectively recovers almost all impurities (including carbon dioxide) as sulfur dioxide or sulfur and corresponding alkaline solutions that are reusable as H/sub 2/S absorption agents. The process comprises contacting the aqueous ammonium, sodium, or potassium sulfide solution with pulverized copper oxide. The resulting copper sulfide precipitate is separated, and the solution of increased sodium hydroxide, potassium hydroxide, or ammonia content is recycled as absorbent for hydrogen sulfide and CO/sub 2/. The copper sulfide is roasted to form recyclable copper oxide and product sulfur dioxide.

• Assignee: Institut Francais du Petrole
• Patent Number(s): US 4163043
• OSTI ID: 6801046
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030400* -- Natural Gas-- Products & By-Products
ALKALI METAL COMPOUNDS
ALKALI METALS
AMMONIA
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
ENERGY SOURCES
EXHAUST GASES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXIDES
INDUSTRIAL PLANTS
MANAGEMENT
MATERIALS RECOVERY
METALS
NATURAL GAS
NATURAL GAS PROCESSING PLANTS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDES
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
PROCESSING
RECOVERY
SODIUM
SULFIDES
SULFUR COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES