乙醇-盐-水——液-液萃取分离PAR的研究

Extraction Study of 4 (2 pyridylazo)resorcinol By Ethanol Salt Water Ethanol Extraction System

研究了在（ＮＨ４）２ＳＯ４，Ｎａ２ＣＯ３存在下，乙醇与水相分离萃取ＰＡＲ的情况．并研究了不同盐量与不同ｐＨ值对萃取分离的影响，实验表明，在乙醇－盐－水，液－液萃取体系中，ＰＡＲ及其络合物能够完全进入乙醇相中，结果令人满意。

The extraction behaviour of ethanol salt water system was studied and proper conditions were selected. It shows that PAR can be completely extracted from water phase by adding 3.5g (NH 4) 2SO 4(or 3g Na 2CO 3) into ethanol phase at pH=1～14.