화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.59, No.45, 19982-19988, 2020
Cerium(IV) Sulfate as a Cocatalyst for Promoting the Direct Epoxidation of Propylene by Ruthenium Porphyrin with Molecular Oxygen
The direct epoxidation of propylene to propylene oxide (PO) using molecular oxygen is difficult to achieve. Liquid-phase aerobic propylene epoxidation has been achieved using metalloporphyrin catalysts, but the efficiency was poor. Herein, the direct aerobic epoxidation of propylene was accomplished using ruthenium porphyrin with Ce(SO4)(2) as a cocatalyst. The propylene conversion and PO selectivity were 33.7% and 82.3%, respectively. The efficiency was approximately 2 times higher than RuTPP (ruthenium mesotetraphenylporphyrin) alone and more than 3 times higher than Ce(SO4)(2) alone. Ce(IV) promoted the formation of allyl radicals and promoted the oxidative cleavage of the C=C bond of propylene.