Citation:
CONG Yunling, YANG Chun. Catalytic Selective Synthesis of Mono(2-Methacryloyloxyethyl) Phosphate[J]. Chinese Journal of Applied Chemistry,
;2015, 32(6): 658-665.
doi:
10.11944/j.issn.1000-0518.2015.06.140338
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Two series of catalysts, HPW/AC and TEAPW/AC, were prepared by impregnating tungstophosphoric acid and[TEAH]3PW12O40 solution on active carbon. The structure and acidic property of these catalysts were characterized by IR,XRD,N2adsorption-desorption and NH3-TPD techniques. Then these catalysts were used to catalyze the synthesis of 2-methacryloyloxyethyl phosphate, a functional phosphate,by using P2O5 as phosphorylation agent. These catalysts possess not only high activity but also high selectivity for the mono(2-methacryloyloxyethyl) phosphate since the formations of di(2-methacryloyloxyethyl)phosphate and tri(2-methacryloyloxyethyl) phosphate are restricted by the micropores of catalysts. Under the optimum conditions and on the optimal catalyst, the total ester yield and the selectivity of mono(2-methacryloyloxyethyl) phosphate are 94% and 95%,respectively. The catalyst can be isolated and recycled with high stability. This catalytic process not only avoids using chlorine-containing reagent in the synthesis,but also greatly increases monophoshpate content in the product.
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Keywords:
- phosphate,
- polyoxometalates,
- catalysts,
- catalytic synthesis
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