o-Chlorination of 2-Nitrobenzoic Acid With Thionyl Chlopide in Xylene And Acet onitrile Solubility Study of Hydrogen Chloride and Sulphur Dioxide in Xylene and Acetonitrile

摘要

The individual and combined solutikities of hydrogen chloride and sulphur dioxide in xylene and acetonitrile,respectively,have been measured in the temperature range 50-70 deg C and at atmospheric pressure.The apparent heat of solution has also been evaluated.It has been found that,in the presence of HCI,the solubility of SO_2 is reduced by approximately 50% at 65 and 60% at 75 deg C.The heat of solution gives results which are in line with the calorimetric measurements on the o-chlorination of 2-nitrobenzoic acid.The solubility measurements also gave consistent results with the calorimetrically obtained gas evolution data at 65 and 75 deg C.