Laboratory Scale Reactors Involving Probe Systems

Laboratory Scale Reactors Involving Probe Systems 

Although it is possible to simply dip the probe into a chemical reaction contained in a standard round bottomed flask or even a beaker, chemical reactions often require vapour tight apparatus, the slow addition of reagents or inert atmospheres. To cater for these constraints sonochemical apparatus has been developed and some of the simpler types are described below. 

A so-called Rosett cell can be fitted with a flanged lid (Fig. 7.12). The design of the Rosett cell allows the irradiated reaction mixture to be sonically propelled from the end of the probe around the loops of the vessel and thus provides both cooling (when the vessel is immersed in a thermostatted bath) and efficient mixing. A PTFE sleeve provides a vapour tight fit between the probe and the glass joint. 

As an alternative to this an ordinary reaction vessel can be adapted for sonic mixing by providing an indentation on its base to disperse the sonic waves as they are reflected from the base (Fig. 7.13). 

In situations where elevated pressures need to be used a useful reactor has been described by Suslick (Fig. 7.14) [10]. 

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Laboratory Scale Reactors Involving Probe Systems... 

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