Removal of mercury from sludge by heating and condensing

Details Removal of mercury from sludge by heating and condensing Removal of mercury from sludge by heating and condensing

1977-07-15

1978-05-02

Hart, Charles N.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

203 87, 210 59, 210 71, 210 73S, 55 46, C22B 4300

Patent

active

040872769

ABSTRACT:
A method is disclosed for stripping mercury from mercury-containing sludges, the improvement consisting in that the sludges are first dried and then roasted, all these operations being carried out under a subatmospherical pressure, a final condensation of the vapor phases takes place under superatmospherical pressure. A high efficiency of recovery is thus warranted.

REFERENCES:
patent: 898980 (1908-09-01), Lowenstein
patent: 1195236 (1916-08-01), Landers
patent: 1315663 (1919-09-01), Gould
patent: 1728359 (1929-09-01), Ormont
patent: 2186876 (1940-01-01), Menardi
patent: 3037759 (1962-06-01), Smith
patent: 3596893 (1971-08-01), Foliforov
patent: 3662998 (1972-05-01), Stratton
patent: 3704875 (1972-12-01), Waltrich
patent: 3767381 (1973-10-01), Bielefeldt
Chemical Eng. Progress (vol. 70, No. 3) Mar. 1974, Mercury Recovery from Process Sludges pp. 73-79.

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