FIELD: metallurgy.
SUBSTANCE: procedure consists in combustion of spent catalyst of acetylene hydro-chlorination in air and in successive cooling combustion products for condensation and extraction of metal mercury and for neutralisation of fumes. Neutralisation is performed with solution of alkali producing water-salt solution with mercury oxide. Mercury oxide produced in the process of neutralisation is filtered from water-salt solution. Further, mercury oxide is directed to recycle and mixed with source spent catalyst for successive decomposition releasing metal mercury at combustion of spent catalyst.
EFFECT: increased output of metal mercury from spent catalyst of acetylene hydro-chlorination.
2 cl, 2 tbl, 1 dwg, 7 ex
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