Disposal of material containing vanadium as landfill

Details Disposal of material containing vanadium as landfill Disposal of material containing vanadium as landfill

1985-04-22

1987-05-26

Hruskoci, Peter

Hydraulic and earth engineering

Subterranean waste disposal, containment, or treatment

With treatment of waste

106109, 106120, 210751, 210901, 423 65, B09B 300

Patent

active

046681248

ABSTRACT:
Materials containing vanadium values which are leachable by water are treated to reduce the leachability of vanadium to minimum practical values, thereby rendering the material suitable for disposal as landfill. Vanadium is insolubilized by adding a polyvalent metal salt which is capable of dissolving in water to form an acidic solution from which polyvalent metal cations are precipitated at a pH of 5, the polyvalent cations having a valence of +3 or higher or being a divalent metal that is oxidizable to a valence of +3 or higher. The salt-treated mixture is then neutralized by a base. The vanadium may be contained in a solid such as, for example, a spent cracking catalyst or a spent sorbent used in the upgrading of petroleum feedstock by selective vaporization or it may be contained in liquid material.

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patent: 4404105 (1983-09-01), de'Lockerente et al.
patent: 4432666 (1984-02-01), Frey et al.

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