Synthesis of High Purity Mono-Alkyl Phosphate Using Cyclic Polyphosphoric Acid

Synthesis and Properties of Lauryl Phosphate Monoester

Lauryl phosphate monoester was synthesized from the starting materials lauryl alcohol and phosphoric acid without catalysts. Subsequently, the crude product was purified by recrystallization and characterized by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (31P-NMR). From the results, it was apparent that the synthesized material was the desired target product. Lauryl monoester potassium phosphate reduced the surface tension of water to 25.08 mN/m at a critical micelle concentration (CMC) of 0.569 mmol/L. It showed a low contact angle and had a low surface tension, indicating a good hydrophilicity. Lauryl monoester potassium phosphate also showed excellent antistatic properties, however its emulsifying ability was not good. The size of the aggregates of lauryl monoester calcium phosphate in aqueous solution was 220 nm and their morphology was spherical.