Alkylation and disproportionation of aromatic hydrocarbons over mesoporous molecular sieves

被引：36
|
作者：
Cejka, J
Krejcí, A
Zilková, N
Dedecek, J
Hanika, J
机构：
[1] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CZ-18223 Prague 8, Czech Republic
[2] Inst Chem Technol, Dept Organ Technol, CZ-16628 Prague 6, Czech Republic
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2001年 / 44卷
关键词：
mesoporous MCM-41; heteropoly acids; alkylation; disproportionation; aromatic hydrocarbons;
D O I：
10.1016/S1387-1811(01)00226-8
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Toluene alkylation with propylene and trimethylbenzene (TMB) disproportionation were investigated over mesoporous molecular sieves of MCM-41 type of different pore dimensions, possessing various Si/Al ratios or modified with heteropoly acids (HPA) of Keggin type. It was shown that the acid strength of(AI)MCM-41 was sufficient to activate propylene in the alkylation of toluene providing cymene selectivity over 96% while the rate of consecutive reactions was negligible. In contrast, TMB disproportionation proceeded at a significantly lower extent than over zeolites. Siliceous MCM-41 modified by HPA (HPA-MCM-41) exhibited a lower rate of cymene isomerization compared to (AI)MCM-41. Moreover, m-cymene was mainly formed at the expense of o-cymene. In TMB disproportionation over HPA-MCM-41 (HPA = H6PV3Mo9O12) significantly higher concentrations of xylenes were reached in comparison with (Al)MCM-41. m- and o-xylenes as primary products of TMBs disproportionation were preferentially formed, (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：499 / 507
页数：9
相关论文
共 50 条
  • [1] Linear alkylation of benzene over mesoporous aluminosilicate molecular sieves.
    Chaudhari, K
    Das, TK
    Waghmode, S
    Sivasanker, S
    [J]. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2001, 222 : U167 - U167
  • [2] Alkylation of benzene with long chain olefine over supported mesoporous molecular sieves
    [J]. Ranliao Huaxue Xuebao, 6 (490-494):
  • [3] Benzene alkylation with dodecene-1 over micro-mesoporous molecular sieves
    O. A. Ponomareva
    S. E. Timoshin
    Yu. V. Monakhova
    E. E. Knyazeva
    V. V. Yuschenko
    I. I. Ivanova
    [J]. Petroleum Chemistry, 2010, 50 : 427 - 436
  • [4] Benzene alkylation with dodecene-1 over micro-mesoporous molecular sieves
    Ponomareva, O. A.
    Timoshin, S. E.
    Monakhova, Yu V.
    Knyazeva, E. E.
    Yuschenko, V. V.
    Ivanova, I. I.
    [J]. PETROLEUM CHEMISTRY, 2010, 50 (06) : 427 - 436
  • [5] Microporous and mesoporous molecular sieves for alkylation of toluene with olefins
    Mayerová, J
    Pawlesa, J
    Zilková, N
    Kosová, G
    Cejka, J
    [J]. MOLECULAR SIEVES: FROM BASIC RESEARCH TO INDUSTRIAL APPLICATIONS, PTS A AND B, 2005, 158 : 1945 - 1952
  • [6] Selective oxidation of aromatic hydrocarbons over copper complexes encapsulated in molecular sieves
    Raja, R
    Ratnasamy, P
    [J]. PROGRESS IN ZEOLITE AND MICROPOROUS MATERIALS, PTS A-C, 1997, 105 : 1037 - 1044
  • [7] Alkylation of hydroquinone with tert-butanol over AlSBA-15 mesoporous molecular sieves
    Binjun Xu
    Weiming Hua
    Yinghing Yue
    Yi Tang
    Zi Gao
    [J]. Catalysis Letters, 2005, 100 : 95 - 100
  • [8] Alkylation of hydroquinone with tert-butanol over AlSBA-15 mesoporous molecular sieves
    Xu, BJ
    Hua, WM
    Yue, YH
    Tang, Y
    Gao, Z
    [J]. CATALYSIS LETTERS, 2005, 100 (1-2) : 95 - 100
  • [9] Aluminum chloride grafted mesoporous molecular sieves as alkylation catalysts
    Dubé, D
    Royer, S
    On, DT
    Béland, F
    Kaliaguine, S
    [J]. MICROPOROUS AND MESOPOROUS MATERIALS, 2005, 79 (1-3) : 137 - 144
  • [10] Synthesis of binaphthols over mesoporous molecular sieves
    Prasad, MR
    Kamalakar, G
    Kulkarni, SJ
    Raghavan, KV
    [J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2002, 180 (1-2) : 109 - 123
12345