Distribution Behavior of Aminobenzoic Acid by Extraction with Di(2-ethylhexyl)phosphoric Acid

A series of extraction equilibrium experiments for aminobenzoic acid with di(2-ethylhexyl)phosphoric acid (D2EHPA) dissolved in n-octane or 1-octanol was carried out. The effects of aminobenzoic acid concentration,D2EHPA concentration and pH on the distribution ratio were discussed in detail. The infrared spectra of the organic phase loaded with solute illustrated that pH had little effect on the structure of the complex formed. There proceed ion association and cation-exchange.reaction in the extraction. An expression of the equilibrium distribution was proposed.

西维来司钠的合成

以对羟基苯磺酸钠为原料 ,经 2 ,2 二甲基丙酰氯缩合、与氯化亚砜反应而成 4 ( 2 ,2 二甲基丙酰氧基 )苯磺酰氯 ,再经与 2 氨基苯甲酸缩合、与甘氨酸苄酯成酰胺、加氢脱去保护基团 ,最后与氢氧化钠成盐而合成了西维来司钠。