&nbsp; <p>The excess of base was neutralized to pH 8.5-9.5 with 33% HCl solution in water. The water phase was separated and dried via azeotropic distillation using 470 ml of toluene, yielding 65 g <b>compound</b><b>Ⅳ</b> as a 16 w/w% suspension in toluene with KF&lt;0.1%.<strong>这里KF是啥意思</strong>? <strong>还有共沸蒸馏在生产上好做吗? </strong></p> <p>&nbsp;</p> 显示全部