METHOD OF NEUTRALISATION OF HOUSEHOLD AND INDUSTRIAL MERCURY-CONTAINING WASTES Russian patent published in 2014 - IPC C22B43/00 C22B7/00 B09B3/00 

FIELD: chemistry.

SUBSTANCE: mixture, consisting of sulphur powder, granules of floatation sulphur pyrite of grade KSF-4 in mixture with broken stone with fraction 20-70 mm or brick crumbs, which are simultaneously agent binding mercury in ionised and neutral forms, taken in ratio 1:9 by weight, and water. After that, mixture is homogenised at rotation rate 20 rev/min, argon is supplied at rate 5.5-6.5 m³/h and then mercury-containing wastes are charged in amount which is at least 50 times less than weight of sulphur powder. Grinding of wastes is carried out to complete binding of metal mercury into water-insoluble compound HgS.

EFFECT: simplification of technology, increase of ecological safety of the process.

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