Catalytic Hydrolysis of Ethyl Acetate

  SPECIFICATIONS:   Catalytic hydrolysis of ethyl acetate experiment, showing acetate feed tank, magnetic drive feed pump, acetate rotameter, stainless heat exchanger, jacketed glass reactor with ion exchange resin, flow control valve, flask for effluent sample collection, buret for sample titration.  Also shown is hot water tank with resistance heater and magnetic drive water circulating pump.  Also shown is separate low time constant continuous-flow temperature control system with shared controller.

Packed-Bed NH3 (or CO2) Absorber

Catalytic Hydrolysis of Ethyl Acetate

Power Consumption & Mixing Efficiency in Agitation

Membrane Air Separation

Copper Liquid-Liquid Extraction

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  DETAILED OVERVIEW:   The apparatus consists of a jacketed glass reactor packed with Rohm and Haas Amberlyst ion exchange resin, which serves as an acid catalyst.  A 20 liter polyethylene tank supplies an aqueous solution of ethyl acetate to a magnetic drive centrifugal pump, which feeds the acetate solution through a rotameter to a stainless heat exchanger and then to the reactor.  A needle valve is used to set the flow rate, and reactor effluent samples are collected, timed, and titrated to a phenolphthalein end point using sodium hydroxide.  A second centrifugal pump circulates hot water to the heat exchanger and the reactor jacket from a resistance heated vessel.  The water temperature is controlled by a commercial temperature indicator/controller. 

The students set a volumetric feed rate and an operating temperature, allow a steady state to develop, and then analyze the reactor effluent to determine the conversion.  From data taken at typically three feed rates and three temperatures, the students can calculate the activation energy and rate constant for the hydrolysis reaction.

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