Results: the es-say illustrates that it improves the quality of Penicillin and the rate of return on azeotropism crystallization. 结果:使青霉素产品质量和共沸结晶收率都比原来有了较大提高。
The high quality of the product with recovery of82% was obtained by cancelling azeotropism of dimethyl carbonate and methanol. 确定了通过破坏碳酸二甲酯和甲醇的共沸现象而得到高质量的碳酸二甲酯,回收率达82%。
Improving the rate of return on sodium salt azeotropism crystallization by means of improving equipment 改进设备提高青霉素钠盐共沸结晶收率