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in Wiley InterScience (www.interscience.wiley.com).Thermal decomposition process of cumene hydroperoxide (CHP) in cumene has been investigated by different researchers from chemical and kinetic point of view although its reactive characteristics have not yet been fully identified. The major discrepancy in the literature data is represented by different reaction nth-order and autocatalytic kinetics suggested. In the present work CHP thermal decomposition is studied by means of isothermal experiments, adiabatic and scanning calometry on commercial hydroperoxide samples. The most simple autocatalytic scheme is adopted for the analysis of the data collected on CHP solutions in cumene at different initial concentrations (80%-30% w/w) allowing to estimate the kinetic parameters regulating the process. A characterization of the intermediate and product distribution at varying reaction time is attempted. The effect on the system reactivity of the addition of small quantities of carbinol or acetophenone or a-methylstyrene to the CHP solution in cumene is also studied.

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The nitration of salicylic acid by means of HNO 3 /AcOH is investigated, and the results are compared with those obtained using different nitrating systems: HNO 3 /H 2 SO 4 /H 2 O (mixed acid), HNO 3 /Ac 2 O/AcOH, aqueous HNO 3 (70% by weight) at 343 K. Little differences are found in terms of yield of the desired product (5-nitrosalicylic acid) among HNO 3 /AcOH mixture, mixed acid, and HNO 3 /Ac 2 O/AcOH systems, aqueous HNO 3 giving the poorest results. However according to the data collected during the present investigation the use of the system HNO 3 /AcOH presents some advantages with respect to the others for the separation and purity of desired product, waste minimization, and safety improvements. The reaction kinetics for the nitration of salicylic acid with this system is also investigated. A global second-order kinetic law (one for the substrate, one for nitric acid) is used in the analysis of the data collected for the formation of the two mononitroderivatives (3nitro-and 5-nitrosalicylic acids) and of the side product 2-nitrophenol.