College :
Gujarat Cleaner Production Centre, Udayog Bhavan, Gandhinagar
Sulfonation of para nitro chloro benzene (PNCB) is performed traditionally using oleum. In that
the material to be sulfonated is added with 23% oleum The reaction proceeds gradually . The
heat evolved is large and in order to take care of this large circulation of cooling water in jacket
is provided.
In the current work, it is planned to investigate the kinetics of sulfonation using SO3.As acidic
medium is required, the salt is initially dissolved in acid and then it is planned that SO3 will
slowly sparge into the mixture. For that, design of reactor is proposed . Kinetic data for
sulfonation using oleum is taken as basis and anticipating some relationship of this kinetics with
kinetics of sulfonation by SO3, the design is done.
Since large quantity of heat is generated, dilution of reactant and increased heat transfer area is
considered. The probable sudden evolution of gases and consideration for runaway reaction is
also taken into account. The final design is proposed to be used for performing experiments at
laboratory scale, the results of which will be applied on industrial scal
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