EDTA is an efficient chelating agent widely used in chemical analysis, plating, medicine and paper making etc. This paper introduces the structure, chemical property, application, pollution of EDTA, and the research status of treatment of EDTA-containing wastewater.

This paper discusses the mechanism of Fries rearrangement reaction, and the effects of structure of phenolic ester,choice of catalyst and reaction temperature on the reaction, moreover, introduces the application of Fries rearrangement reaction in organic synthesis.

View of pleasure learning is one of the learning concepts embodied in the new curriculum reform. Students with view of pleasure learning can maintain their learning interest, improve their learning efficiency, love science, society and life, so their scientific literacy will be developed. Chemistry teachers can cultivate studentscview of pleasure learning by strategies such as using various positive factors, seeking the aesthetic feeling in teaching material, using chemical experiment, contacting actual production,selecting multimedia technology and giving various evaluations etc.