亚硫酸氢钠协同催化对苯醌加氢性能OA北大核心CSTPCD

The inhibition effect of sodium hydrogen sulfite dosage on quinhydrone formation was investigated by taking advantage of the fact that the addition reaction of sodium hydrogen sulfite with p-benzoquinone(BQ)to form water-soluble α-hydroxy sodium hydrogen sulfite derivatives can inhibit quinhydrone formation,and the optimal conditions for the hydrogenation reaction of BQ were determined.The inhibitory mechanism of sodium hydrogen sulfite was studied.The experimental results show that the optimal reaction conditions are hydrogen pressure 1.0 MPa,reaction temperature 90℃,and sodium hydrogen sulfite addition 25%(x)(based on BQ amount).The addition of sodium hydrogen sulfite can inhibit the interaction between BQ and hydroquinone,in the aqueous phase,sodium hydrogen sulfite undergoes an addition reaction with BQ,blocking the formation of hydrogen bonds between BQ and hydroquinone,and at the same time,storing the BQ in the form of water-soluble α-hydroxy sodium sulfonate derivatives,which are then utilized when hydrogenation takes place,can effectively inhibit the formation of quinhydrone,and promote the hydrogenation reaction.