Atom economical benzylation of phenol with benzyl alcohol using 20 % (w/w)Cs2.5H0.5PW12O40 supported on mesocellular foam silica (MCF) and its kinetics

被引：29

作者：

Bhadra, Kalpesh H. ^{[1
]}

Yadav, Ganapati D. ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Chem Engn, Nathalal Parekh Marg, Bombay 400019, Maharashtra, India

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2018年 / 263卷

关键词：

Benzylation; Heteropoly acid; O-alkylation; C-alkylation; Cs2.5H0.5PW12O40; Mesocellular foam (MCF); EFFICIENT HETEROGENEOUS CATALYST; EXCHANGED HETEROPOLY TUNGSTATE; MESOPOROUS MOLECULAR-SIEVES; SOLID ACID CATALYSTS; SELECTIVE CATALYST; DIMETHYL CARBONATE; ZIRCONIA; ALKYLATION; TRANSESTERIFICATION; ALUMINOSILICATE;

D O I：

10.1016/j.micromeso.2017.12.017

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Traditionally benzylation of phenol is carried out with benzyl chloride which is corrosive and difficult to handle, and the resultant reaction is not atom economical. Benzyl alcohol is an alternative to benzyl chloride which is safe and easy to handle. Benzyl phenols are industrially important products particularly in plastic, rubber and petroleum industries. In present study, cesium salt of dodecatungstophosphoric acid (Cs2.5H0.5PW12O40, Cs-DTP) supported on mesocellular foam (MCF) silica was used as catalyst among others. The activity of prepared catalyst, 20% (w/w) Cs-DTP/MCF was compared with Amberlyst-15, montmorillonite clay K10, S-ZrO2 and unsupported Cs-DTP catalyst. The supported catalyst showed better performance because of even distribution of acidic sites on MCF. The effect of reaction parameters were studied in detail and it was found that reaction follows second order kinetics. The activation energy was found to be 15.94 kcal/mol. The catalyst was found reusable.

引用

页码：190 / 200

页数：11

共 47 条

[1]

[Anonymous], TOMORROWS CHEM TODAY

[2]

Beck J. S., 1991, WO Patent, Patent No. [91/11390, 9111390]

[3] DODECATUNGSTOPHOSPHORIC ACID HEXAHYDRATE, (H5O2+)3(PW12O403-) - TRUE STRUCTURE OF KEGGINS PENTAHYDRATE FROM SINGLE-CRYSTAL X-RAY AND NEUTRON-DIFFRACTION DATA [J].

BROWN, GM ;

NOESPIRLET, MR ;

BUSING, WR ;

LEVY, HA .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1977, 33 (APR15) :1038-1046

[4] Highly active Si-MCM-41-Supported Ga2O3 and In2O3 catalysts for Friedel-Crafts-type benzylation and acylation reactions in the presence or absence of moisture [J].

Choudhary, VR ;

Jana, SK ;

Kiran, BP .

JOURNAL OF CATALYSIS, 2000, 192 (02) :257-261

[5] Ordered porous materials for emerging applications [J].

Davis, ME .

NATURE, 2002, 417 (6891) :813-821

[6] Zirconia-supported phosphotungstic acid as catalyst for alkylation of phenol with benzyl alcohol [J].

Devassy, BM ;

Shanbhag, GV ;

Lefebvre, F ;

Böhringer, W ;

Fletcher, J ;

Halligudi, SB .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2005, 230 (1-2) :113-119

[7]

Fogler H.Scott., 2004, ELEMENTS CHEM REACTI, V3rd

[8] Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15 [J].

Gracia, Maria D. ;

Balu, Alina M. ;

Campelo, Juan M. ;

Luque, Rafael ;

Marinas, Jose M. ;

Romero, Antonio A. .

APPLIED CATALYSIS A-GENERAL, 2009, 371 (1-2) :85-91

[9] Comparison of an ordered mesoporous aluminosilicate, silica, alumina, titania and zirconia in normal-phase high-performance liquid chromatography [J].

Grun, M ;

Kurganov, AA ;

Schacht, S ;

Schuth, F ;

Unger, KK .

JOURNAL OF CHROMATOGRAPHY A, 1996, 740 (01) :1-9

[10] Silica-included heteropoly compounds as solid acid catalysts [J].

Izumi, Y ;

Ono, M ;

Kitagawa, M ;

Yoshida, M ;

Urabe, K .

MICROPOROUS MATERIALS, 1995, 5 (04) :255-262

← 1 2 3 4 5 →