Disposal of spent vanadium pentoxide catalyst by vitrification

Details Disposal of spent vanadium pentoxide catalyst by vitrification Disposal of spent vanadium pentoxide catalyst by vitrification

1990-09-11

1992-02-25

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

405129, 423DIG12, 75640, 75655, 75693, 75751, C22B 1300, C22B 1900

Patent

active

050910019

ABSTRACT:
Spent oxidic catalyst, such as vanadium pentoxide from a sulphuric acid manfacturing process, is rendered into an environmentally acceptable non-leachable form suitable for disposable by incorporation into a vitrified amorphous slag formed of oxidic slag forming agents such as CaO, SiO.sub.2, FeO and Al.sub.2 O.sub.3. The vitrified slag may be formed as part of a conventional ferrous or non-ferrous smelting process, or may employ a pre-existing slag from such a process.

REFERENCES:
patent: 4017308 (1977-04-01), Peterson et al.
patent: 4272293 (1981-06-01), Hooykaas
patent: 4356030 (1982-10-01), Halpin et al.
patent: 4532113 (1985-07-01), Chao et al.
patent: 4668124 (1987-05-01), Pitts et al.

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