Recovery process using metal oxide absorbent with improved purge

Patent · Tue Oct 03 04:00:00 EDT 1989

OSTI ID:7014160

Pendergraft, P T

This patent describes additional steps in a method for absorbing at least H{sub 2}S from a Claus plant effluent stream. The method additionally comprising the steps of: following the regeneration of ZnS to ZnO in a first reactor, passing at least a portion of the total Claus plant effluent stream in contact with regenerated ZnO producing a purge effluent comprising increased amounts of sulfur dioxide SO{sub 2} relative to SO{sub 2} concentrations in the Claus plant effluent; and passing the purge effluent in contact with ZnO in a second reactor under conditions including temperature and composition for removing SO{sub 2} therefrom.

• Assignee: Amoco Corp., Chicago, IL
• Patent Number(s): US 4871521
• Application Number: PPN: US 7-218526A
• OSTI ID: 7014160
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
CLAUS PROCESS
CONTROL
DESULFURIZATION
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INDUSTRIAL PLANTS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM REFINERIES
POLLUTION CONTROL
REMOVAL
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES
ZINC COMPOUNDS
ZINC OXIDES