Ningning Dong

Abstract: The invention relates to a synthesis technique of 9-fluorenone, which comprises the following steps: by using industrial fluorene as the raw material, sodium hydroxide as a catalyst and dimethylsulfoxide as a solvent, heating and dissolving the material in a reaction kettle, carrying out reaction kettle external circulation, passing through a microbubble generator, returning to the reaction kettle to react, cooling the reaction material to crystallize, separating, washing and recrystallizing to obtain the fluorenone The solvent adopts a non-benzene pyridine solvent, and thus, has the advantages of low toxicity and environment friendliness The catalyst adopts the industrial common catalyst which is cheap and accessible, thereby optimizing the production technique and greatly lowering the consumptions of the catalyst and solvent The solvent can be recovered, thereby implementing reuse The technique has the advantages of mild reaction conditions, simple and effective reactor, sufficient reaction, high speed and high fluorenone yield The purity is greater than 99%, and the yield can reach 85% above

TL;DR: In this article, a high-performance water reducing agent production device is characterized in which a flowmeter is arranged between a methylacrylic acid metering tank and an esterification reactor.