Process for preparing catalysts for removal of nitrogen oxides

Patent · Tue May 01 04:00:00 EDT 1979

OSTI ID:5829468

Okabe, T; Hayashi, S

A catalyst for removal of nitrogen oxides which shows extremely good catalytic activity and is excellent in durability and is low in the activity of oxidizing SO/sub 2/ into SO/sub 3/ can be prepared at a low cost by impregnating a titanium oxide carrier with a vanadium sulfate, a vanadyl sulfate or a mixture thereof and then reacting a mixed gas consisting of 0.05 to 100% by mole of ammonia and 99.95 to 0% by mole of an inert gas which is inert to both ammonia and vanadium and vanadyl sulfates with the impregnated carrier while the reaction mixture is maintained at a temperature of 300/sup 0/ to 520/sup 0/ C, and preferably 370/sup 0/ to 450/sup 0/C alternativerly, the catalyst can be prepared by shaping a mixture of titanium oxide and a vanadium sulfate, a vanadyl sulfate or a mixture thereof into a desired shape and then reacting a mixed gas consisting of 0.05 to 100% by mole of ammonia and 99.95 to 0% by mole of an inert gas which is inert to both ammonia and vanadium and vanadyl sulfates with the shaped mixture while the reaction mixture is maintained at a temperature of 300/sup 0/ to 520/sup 0/C, and preferably 370/sup 0/ to 450/sup 0/C.

• Assignee: Seitetsu Kagaku Co., Ltd.
• Patent Number(s): US 4152296
• OSTI ID: 5829468
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SULFATES
SULFUR COMPOUNDS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM SULFATES