Improved catalytic activity and selectivity of (Al+B)-MCM-41 mesoporous materials treated with ammonium fluoride in the vapor-phase Beckmann rearrangement of cyclohexanone oxime

被引：0
|
作者：
Campelo, JM [1 ]
Conesa, TD [1 ]
Luna, D [1 ]
Marinas, JM [1 ]
Romero, AA [1 ]
机构：
[1] Univ Cordoba, Fac Ciencias, Dept Quim Organ, E-14014 Cordoba, Spain
来源：
MOLECULAR SIEVES: FROM BASIC RESEARCH TO INDUSTRIAL APPLICATIONS, PTS A AND B | 2005年 / 158卷
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D O I：
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中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Aluminium-boron-silicate MCM-41 mesoporous molecular sieves with Al/B ratio in the range 2-0.5 were characterized by XRD, N-2 adsorption, MAS NMR, and DRIFT, and their acid properties were determined by pyridine (Py) adsorption. (Al+B)-MCM-41 samples were prepared by two procedures: (i) direct synthesis by using TEOS, H3BO3 and Cl3Al center dot 6H(2)O as silica, boron and aluminum Sources, respectively and (ii) the as-synthesized samples obtained in (i) were suspended in 300 mL of NH4F 0.1 M for 34 h. The aluminum-boron-silicate MCM-41 materials treated with NH4F improved both the selectivity to epsilon-caprolactam (related mainly to boron content) and the life span (related mainly to NH4F treatment).
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页码：1421 / 1428
页数：8
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