Method for producing thiosalicylic acid
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United States of America Patent
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Jul 27, 2004
Grant Date -
Jun 17, 2004
app pub date -
Dec 11, 2002
filing date -
Dec 19, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a method for causing sodium sulfide or a mixture of sodium sulfide and sulfur to react with diazonium salt formed by diazotizing anthranilic acid, wherein the Na/S atomic ratio as calculated on the basis of the employed sodium sulfide and sulfur is adjusted to within the range of 1.33 to 2.0 during the reaction. Thus is made practicable the manufacture of thiosalicylic acid in a high yield without going through the individual route of isolating and reducing dithiosalicylic acid.
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