Synthesis and Characterization of Behenyl alcohol Alkyl Phosphate Emulsifier
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Abstract:
Alkyl phosphate，an emulsifying agent, was synthesized with behenyl alcohol and phosphoric anhydride as the starting materials. Effects of the molar ratio of behenyl alcohol and phosphoric anhydride, esterification temperature and esterification time on the product composition were investigated by orthogonal experiments. The optimum molar ratio of behenyl alcohol and phosphoric anhydride, esterification temperature and esterification time were 5:1, 85 ℃, 6 h, respectively. Under the optimum conditions, the mass fraction of di-alkyl phosphate (DAP) was higher than mono-alkyl phosphate (MAP), and the residual phosphoric acid (PA) in the product was 0.66%. The results of ESI and EAI of emulsion showed that when pH was 6~7, the emulsifying effect of product was best. The strong capacity and emulsifying stability of product were confirmed by emulsifying test in which oil phase was GTCC and olive oil. The product structure was confirmed through IR and31P-NMR and the results showed that DAP and MAP were included in the product.
