Patent
2-hydrocarbyldithio - 5 - mercapto-1,3,4-thiadiazoles and their preparation
TLDR
In this paper, a 2.5DIMMERCACTO-1,3,4THIADIAZOLES were used for thwarting COPPER CORROSION by active SULFUR.Abstract:
NOVEL AND USEFUL 2-HYDROCARBYLDITHIO-5-MERCAPTO-1,3,4THIADIAZOLES ARE PREPARED BY OXIDATION COUPLING OF EQUAL MOLECULAR PORTIONS OF A HYDROCARBYL MERCAPTAN AND 2,5DIMERCAPTO-1,3,4-THIADIAZOLE OR ITS ALKALI METAL MERCAPTIDE. 2-HYDROCARBYLDITHIO - 5 - MERCAPTO-1,3,4-THRIADIAZOLES ARE UNUSUAL SCAVENGERS OF ELEMENTAL SULFUR, FOR EXAMPLE ONE MOLE CAN DEACTIVATE 100 ATOMS OF ELEMENTAL SULFUR AT A TEMPERATURE OF ABOUT 210*F. AND 25 ATOMS OF ELEMENTAL SULFUR AT ABOUT 300*F. THE SULFUR DEACTIVATION MAKES 2-HYDROCARBYLDITHIO-5-MERCAPTO-1,3,4-THIADIAZOLES USEFUL FOR PREVENTING COPPER CORROSION BY ACTIVE SULFUR. ILLUSTRATIVE OF 2-HYDROCARBYLDITHIO-5-MERCAPTO-1,3,4-THIADIAZOLES ARE THOSE HAVING AS THE HYDROCARBYL SUBSTITUENT ALKYL, CYCLOALKYL, ALKARYL AND ARALKYL GROUPS.read more
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