Conversion of aluminum-mercury amalgam and incidental mercury in

Details Conversion of aluminum-mercury amalgam and incidental mercury in Conversion of aluminum-mercury amalgam and incidental mercury in

1987-09-04

1989-05-16

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

148283, 427142, 4272551, 4272552, 4272553, C23C 2200

Patent

active

048308293

ABSTRACT:
A method for treating mercury-contaminated aluminum surfaces to render aluminum-mercury amalgam and liquid mercury harmless to aluminum is provided. The method involves converting the mercury to a compound which is inert to aluminum, such as mercuric sulfide, at temperatures below the freezing point of water. This is accomplished by contacting the aluminum surface with a condensable solvent such as carbon disulfide, carbonyl sulfide, or tetrahydrofuran having gaseous hydrogen sulfide dissolved therein, and then dissolving a reactive gas such as sulfur dioxide within the solvent. The reaction of the two dissolved gases within the solvent generates the sulfur which reacts with the mercury to form mercuric sulfide.

REFERENCES:
patent: 2150929 (1939-03-01), Kohler et al.
patent: 2636831 (1949-10-01), Carney
patent: 4701212 (1987-10-01), Yan
patent: 4709118 (1987-11-01), Yan
patent: 4764219 (1988-08-01), Yan

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