THE KINETICS OF THE FORMATION OF ETHANOLAMINES

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Abstract
The formation of ethanolamines from ethylene oxide and ammonia is a case of simultaneous, consecutive, competitive second order reactions. The results obtained show the time at which to stop a reaction for a maximum yield of any one of the three products. It is shown that as the reaction proceeds from ammonia to monoethanolamine to diethanolamine to triethanolamine the velocity constants are in the ratio of 1:6:4 for the three reactions. The values of the velocity constants are determined graphically. From these values an energy of activation of 16,600 cal. is calculated and is the same for each step. There is an indication that a tetraethanol – ammonium hydroxide is slowly formed.

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