【文章摘要】 <正> Pyridine and its derivatives (or pyridylproducts) are widely used in the productionof pesticides,pharmaceuticals,dyes,spices,rubber,feed and daily chemicals. As an importantraw material,its price has become asignal in the pesticide market in recent years.With the rapid economic development,China's demand for pyridine and its derivativesis also growing annually. China now |