A method for obtaining thymol by gas phase catalytic alkylation of m-cresol over zinc aluminate spinel

被引：67
作者：
Grabowska, H
Mista, W
Trawczynski, J
Wrzyszcz, J
Zawadzki, M
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, Poland
[2] Wroclaw Univ Technol, Inst Chem & Technol Petr & Coal, PL-50344 Wroclaw, Poland
来源：
APPLIED CATALYSIS A-GENERAL | 2001年 / 220卷 / 1-2期
关键词：
alkylation; m-cresol; thymol; ZnAl2O4; acid-base properties;
D O I：
10.1016/S0926-860X(01)00722-0
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：
The gas-phase catalytic alkylation of in-cresol with isopropanol on ZnAl2O4 catalysts of different properties has been studied. The reactions were carried out in a continuous process at atmospheric pressure in the temperature range of 473-583 K. Both, O- and C-alkylated products were obtained at lower temperatures while at higher temperatures thymol was the main product of the reaction. According to the elaborated method thymol can be efficiently obtained with selectivity reaching up to 88.4% at an in-cresol conversion of 78.2%. (C) 2001 Elsevier Science B.V. All rights reserved.
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收藏
页码：207 / 213
页数：7
相关论文
共 36 条
[1]   METAL SUPPORT EFFECTS AND CATALYTIC PROPERTIES OF PLATINUM SUPPORTED ON ZINC ALUMINATE [J].
AGUILARRIOS, G ;
VALENZUELA, MA ;
ARMENDARIZ, H ;
SALAS, P ;
DOMINGUEZ, JM ;
ACOSTA, DR ;
SCHIFTER, I .
APPLIED CATALYSIS A-GENERAL, 1992, 90 (01) :25-34
[2]   Preparation and characterization of spinel-type high surface area Al2O3-ZnAl2O4 mixed metal oxides by an alkoxide route [J].
Arean, CO ;
Sintes, BS ;
Palomino, GT ;
Carbonell, CM ;
Platero, EE ;
Soto, JBP .
MICROPOROUS MATERIALS, 1997, 8 (3-4) :187-192
[3]  
Biedermann W, 1978, US Patent, Patent No. [US4086283A, 4086283]
[4]  
Botelho MG, 2000, MICROBIOS, V103, P31
[5]  
CAMPELO JM, 1988, HETEROGENEOUS CATALY, P249
[6]   REACTIONS OF PHENOLIC-COMPOUNDS OVER HZSM-5 [J].
CHANTAL, PD ;
KALIAGUINE, S ;
GRANDMAISON, JL .
APPLIED CATALYSIS, 1985, 18 (01) :133-145
[7]   Structure and surface and catalytic properties of Mg-Al basic oxides [J].
Di Cosimo, JI ;
Diez, VK ;
Xu, M ;
Iglesia, E ;
Apesteguia, CR .
JOURNAL OF CATALYSIS, 1998, 178 (02) :499-510
[8]   Structural requirements and reaction pathways in condensation reactions of alcohols an MgyAlOx catalysts [J].
Di Cosimo, JI ;
Apesteguía, CR ;
Ginés, MJL ;
Iglesia, E .
JOURNAL OF CATALYSIS, 2000, 190 (02) :261-275
[9]  
DIRDY N, 1993, PHARMAZIE, V48, P301
[10]  
DURGAKUMARI V, 1990, RES CHEM INTERMEDIAT, V14, P223
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