Desulfurization process for hydrogen sulfide-containing gases

Patent · Tue Jan 11 04:00:00 EST 1977

OSTI ID:7277344

Sonoda, T; Nakano, M; Okane, M; Suzuki, H

In a process for desulfurizing hydrogen sulfide-containing gases by contacting a hydrogen sulfide-containing gas with an alkaline aqueous solution containing a naphthoquinonesulfonate to effect absorption of hydrogen sulfide by said aqueous solution and subjecting the effluent to catalytic oxidation by a molecular oxygen-containing gas to separate out sulfur, an improvement which comprises (a) carrying out the absorption of hydrogen sulfide by using a liquid absorent having a pH value adjusted by means of ammonia to 8 to 10 and containing a catalyst components a naphthoquinonesulfonate and a variable valent metal compound, (b) carrying out the catalytic oxidation of the effluent containing absorbed therein hydrogen sulfide by means of a molecular oxygen-containing gas as to lower the concentration of hydrosulfide ion in the effluent to 70 ppM or less and (c) recirculating the said liquid absorbent or effluent to the contact with the said hydrogen sulfide-containing gas.

• Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
• Patent Number(s): US 4002727
• OSTI ID: 7277344
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
DESULFURIZATION
ELEMENTS
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
NONMETALS
OXIDATION
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SEPARATION PROCESSES
SORPTION
SULFIDES
SULFUR
SULFUR COMPOUNDS
WASTES