Cones Under External Pressure

This equation that expresses the cone in terms of an equivalent cylinder of thickness U and length L is analogous to Eq. 6.42 for cylindrical shells. Thus the ASME Code, VIII-1, applies the same equations for the design of cylindrical shells under external pressure for the design of cones with applicable values of U and Le. 

To a stirred solution of 4 -chloro-2-nitrodiphenylamine (6.78 g, 0.027 mol) in coned HjSO (20 mL) maintained at 20 °C by external cooling, was added dropwise 28 % oleum (25 mL). After 5 min, the mixture was slowly poured into a vigorously stirred solution of NaHCOj (150 g) in H O (2.5 L) and EtOH (300 mL). A yellow precipitate separated and the aqueous suspension was extracted with CH Cl (2.5 L). The extract was dried (Na SO ) and evaporated under reduced pressure to give a brown solid yield 4.05 g (64%). 

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