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Technological parameters of the ammonolysis of waste 1,2-dichloropropane
Marcin Bartkowiak1, Grzegorz Lewandowski, Eugeniusz Milchert
1Institute of Organic Chemical Technology, Technical University of Szczecin, Pulaskiego 10, PL 70-322 Szczecin, Poland.
Abstract:
The ammonolysis of waste 1,2-dichloropropane (DCP) using liquid ammonia has been investigated. The influence of temperature, molar ratio of NH3/1,2-dichloropropane and reaction time was examined. The highest yield of the synthesis was achieved at a temperature of 140 degrees C, for the reaction time of 3 h and the molar ratio of NH3/1,2-dichloropropane as 20:1. Under these conditions the degree of 1,2-dichloropropane conversion amounted to 97.1 mol% and the selectivity of transformation to 1,2-diaminopropane (DAP) in relation to consumed 1,2-dichloropropane was 25.3 mol%, whereas in relation to consumed ammonia 17.9 mol%. The remaining 1,2-dichloropropane reacts to form polypropyleneamines.
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