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Selective hydrogenation of dimethyl terephthalate over a potassium-modified Ni/SiO2 catalyst?

Published:31 May 2023 DOI: 10.1039/D3RA02223D PMID: 37266504
Han Xiao, Chao Zhang, Jiaojiao Zhao, Zhaohui Zheng and Yuehui Li

Abstract

Selective hydrogenation of dimethyl terephthalate (DMT) is an ideal way to prepare 1,4-cyclohexane dicarboxylate (DMCD), an important intermediate and monomer. Even though noble metal-based catalysts (e.g., Ru, Pd) have been developed for selective hydrogenation of DMT, the use of non-precious Ni catalysts to achieve high activity and selectivity is still challenging. In this study, we present that only 0.5 wt% of KF by post-impregnated doping can significantly improve the performance of Ni/SiO2 catalysts (83% vs. 96% selectivity; 41% vs. 95% conversion). The selectivity of DMCD can be up to 97%, which is the highest reported over Ni catalysts. The boosting effect of KF modification might be due to higher amounts of Ni(0) species and lower amounts of moderate acidic sites, which are beneficial for selective hydrogenation of phenyl rings over hydrogenolysis of ester groups.

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Related products
Procduct Name CAS Molecular Formula Supplier Price
Dimethyl terephthalate 120-61-6 C10H10O4 513 suppliers $6.00-$2120.00
Nickel 7440-02-0 Ni 480 suppliers $14.39-$7510.00
Potassium fluoride 7789-23-3 FK 446 suppliers $12.50-$7950.00
Ruthenium 7440-18-8 Ru 379 suppliers $29.12-$6000.00
PALLADIUM ON STRONTIUM CARBONATE, REDUCED C2H2O6PdSr 101 suppliers $36.40-$2180.00
1,4-cyclohexanedicarboxylicacid,diethylester 72903-27-6 C12H20O4 43 suppliers Inquiry

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