摘要
采用 3 1 P NMR波谱对高碳脂肪醇与五氧化二磷的反应进行了研究 ,定量地表征了产物混合物中的各组分。结果表明 :单酯 (MAP)、双酯 (DAP)、聚酯 (PAP)和磷酸盐 (PA)在 3 1 P NMR波谱上的化学位移分别为 :3 5～ 4 6 ,0 8～ 1 1,- 9 0～ - 10 0和 3 0～ 3 5 (当pH =9时 )。同时为不同用途的脂肪醇磷酸酯盐提供了可选择的和稳定的合成条件 ,即 :在n(ROH)∶n(P2 O5) =(2 3∶1 0 )～ (3 1∶1 0 ) ,反应时间 2～ 3h ,反应温度不大于 10 0℃条件下 ,P2 O5的转化率大于 95 % ,MAP、DAP和PAP的选择性分别为 4 0 %～ 6 5 % ,2 5 %～ 33%和 10 %～ 30 %。
Phosphorylation of high fatty alcohol with phosphorus pentoxide was studied with the aid of 31 P NMR spectrum. Amounts of all components in the products were determined.The results indicate that chemical shifts of monoalkyl phosphate(MAP),dialkyl phosphate(DAP),polyalkyl phosphate(PAP) and phosphoric acid are respectively 3 5-4 6,0 8-1 1,-9 0--10 0 and 3 0-3 5(at pH=9).Also, selected and stable synthetic conditions are provided for high fatty alcohol phosphates of different uses.Thus,molar ratio of high fatty alcohol to P 2O 5 is (2 3∶1 0)-(3 1∶1 0),reaction time is 2-3 h, and reaction temperature is below 100 ℃. Conversion of P 2O 5 is more than 95%, and the selectivities for MAP,DAP and PAP are 40%-65%,25%-33% and 10%-30%respectively.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2002年第2期102-104,108,共4页
Fine Chemicals
