Use of delaminated zeolites (ITQ-2) and mesoporous molecular sieves in the production of fine chemicals: Preparation of dimethylacetals and tetrahydropyranylation of alcohols and phenols
Use of delaminated zeolites (ITQ-2) and mesoporous molecular sieves in the production of fine chemicals: Preparation of dimethylacetals and tetrahydropyranylation of alcohols and phenols
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DOI：
10.1006/jcat.2000.2861
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发表时间：
2000-06
影响因子：
7.3
通讯作者：
I. Rodríguez;M. Climent;S. Iborra;V. Fornés;A. Corma
中科院分区：
文献类型：
--
作者：
I. Rodríguez;M. Climent;S. Iborra;V. Fornés;A. Corma
用ITQ-2分子筛作酸催化剂，成功地进行了醛的保护反应，生成相应的二甲基缩醛，醇和酚的保护反应，生成相应的四氢吡喃醚。将其对这些反应的催化活性与用MCM-22、Beta沸石和介孔铝硅酸盐MCM-41获得的那些进行比较，所有这些都具有相似的Si/Al比。所获得的结果表明，当反应涉及庞大的反应物，ITQ-2显示，在所有情况下，作为其分层结构和强酸位点的存在下的组合的结果，最高的活性。
Protection of aldehydes by formation of the corresponding dimethyl acetals and protection of alcohols and phenols by formation of the corresponding tetrahydropyranyl ethers have been carried out successfully using ITQ-2 zeolite as acid catalyst. Its catalytic activity for these reactions is compared with those obtained with MCM-22, Beta zeolites, and the mesoporous aluminosilicate MCM-41, all of them with similar Si/Al ratios. The results obtained indicate that when the reactions involve bulky reactants, ITQ-2 shows, in all cases, the highest activity as a consequence of the combination of its delaminated structure and the presence of strong acid sites.