Relevant articles and documents
Monolithic materials: New high-performance supports for permanently immobilized metathesis catalysts
Mayr, Monika Mayr, Betina Buchmeiser, Michael R.
Back to the roots: Ring-opening metathesis polymerization allows the synthesis of monolithic materials, which may be subject to an in situ derivatization with dihydroimidazolium salts through metathesis graft polymerization. This method offers an attracti
The role of la in improving the selectivity to cyclohexene of Ru catalyst for hydrogenation of benzene
Sun, Hai-Jie Dong, Ying-Ying Li, Shuai-Hui Jiang, Hou-Bing Zhang, Yuanxin Liu, Zhong-Yi Liu, Shou-Chang
Ru-La catalysts with different La/Ru molar ratios were prepared by co-precipitation. Characterizations revealed that the promoter La existed as La(OH)3 on the Ru surface. The La(OH)3 itself could not enhance the selectivity to cyclohexene of Ru catalyst. However, the La(OH) 3 could react with ZnSO4 in slurry to form an insoluble (Zn(OH)2)3(ZnSO4)(H2O)3 salt. The chemisorbed (Zn(OH)2)3(ZnSO4)(H 2O)3 salt on Ru surface played a key role in improving the selectivity to cyclohexene of Ru catalyst. Ru-La catalyst with the optimum La/Ru molar ratio of 0.14 gave a maximum cyclohexene yield of 59.5%. Besides, Ru-La(0.14) catalyst had a good reusability and an excellent stability.
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