| 摘要 |
The invention relates to an ecologically favorable process for the hydrolytic decomposition of halogen-containing compounds of the formula CX4 or CHX3 or mixtures of these compounds, in which X as halogen is chlorine or bromine or a combination thereof, in an aqueous-alkaline medium, which comprises first keeping the aqueous-alkaline reaction mixture comprising the abovementioned halogen-containing compounds at a temperature of between 0 DEG and 1000 DEG C. under the autogenous pressure which is formed in a closed reaction vessel for a period of up to 10 hours and then subjecting the mixture to a heat treatment at a temperature of between 70 DEG and 150 DEG C. under the autogenous pressure which is formed therein, in the presence of sulfite. The process according to the invention is particularly suitable for hydrolytic decomposition of halogen-containing reaction products from aqueous-alkaline hypohalite oxidations. The preparation of naphthalene-1,4,5,8-tetracarboxylic acid and its tetraalkali metal salts can be carried out in an ecologically particularly favorable manner by the process according to the invention.
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