Process for removal of hydrogen sulfide from gaseous stream

Patent · Tue Apr 02 04:00:00 EST 1991

OSTI ID:5089341

Nisula, S P; O'Callaghan, C P; Bogaczyk, G A

This patent describes a process for removing hydrogen sulfide from a gaseous stream. It comprises contacting the hydrogen sulfide containing gaseous stream with an aqueous solution comprising a water soluble oxidized polyvalent metal chelate catalyst to convert the hydrogen sulfide to particulate elemental sulfur and reduce the polyvalent metal chelate catalyst, the contacting taking place in the presence of sufficient oxygen for oxidizing the reduced polyvalent metal chelate catalyst to its oxidized state, wherein the aqueous solution contains an effective amount of dispersing agent for maintaining the particulate elemental sulfur in dispersed suspension in the aqueous solution, thereby forming a suspension of the particulate elemental sulfur, and replacing the discarded aqueous solution with fresh aqueous solution and the water soluble oxidized polyvalent metal chelate catalyst for contact with additional hydrogen sulfide containing gaseous stream.

• Assignee: Chevron Research and Technology Co., San Francisco, CA (USA)
• Patent Number(s): A; US 5004588
• Application Number: PPN: US 7-530446
• OSTI ID: 5089341
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
AQUEOUS SOLUTIONS
CATALYSTS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
CONTROL
DESULFURIZATION
DISPERSIONS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MIXTURES
POLLUTION CONTROL
REMOVAL
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS
VALENCE
WASTES