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EXAMPLE 3
Benzene diazonium fluoride was prepared substantially in accordance with the procedure of Example 1 except that the temperature of the refrigerated bath of glycol and water was maintained at plus 5.degree. C.
The temperature of the reaction mixture exiting each static mixer in the first four sections was higher (35.degree. C., maximum temperature in each such section). The temperature of the reaction mixture exiting each static mixer in the last six sections was also higher (about 20.degree. C., maximum temperature in each such section).
The resulting mixture exiting the cross-flow tubular reactor was a dark brownish-black solution. Analysis of the samples of the exiting stream showed presence of benzene diazonium fluoride in lower concentrations of from about 2.05 to about 2.17 g-moles per liter, corresponding to a diazonium fluoride yield of about 85 to 90% based on the amount of nitrosyl fluoride introduced into the reactor.

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