Unique solvent effect of microporous crystalline titanosilicates in the oxidation of 1-hexene and cyclohexene

Weibin Fan; Peng Wu; Takashi Tatsumi

doi:10.1016/j.jcat.2008.03.001

Unique solvent effect of microporous crystalline titanosilicates in the oxidation of 1-hexene and cyclohexene

Weibin Fan
, Peng Wu
, Takashi Tatsumi^*

^*Corresponding author for this work

School of Chemistry and Molecular Engineering

Research output: Contribution to journal › Article › peer-review

155 Scopus citations

Abstract

We investigated the influence of solvent on the activity, epoxide selectivity, and H₂O₂ efficiency of three types of zeolites-TS-1, Ti-Beta, and Ti-MWW-in the liquid-phase epoxidation of 1-hexene and cyclohexene. We found that the effect of solvent not only was related to the hydrophilicity/hydrophobicity of titanosilicates, but also was highly dependent on substrates. Acetonitrile should be the solvent of choice for the oxidation of 1-hexene over Ti-Beta and Ti-MWW, whereas methanol is preferred by TS-1. In contrast, for cyclohexene oxidation, methanol is favorable for Ti-Beta, whereas acetonitrile is the best for TS-1 and Ti-MWW. The effect of hydrophilicity/hydrophobicity is demonstrated by a series of catalytic results, but this cannot explain the solvent effect on the oxidation of cyclohexene over Ti-Beta. The H₂O₂ efficiency depends strongly on the aprotic/protic nature and polarity of solvents, as well as on the properties of titanosilicates.

Original language	English
Pages (from-to)	62-73
Number of pages	12
Journal	Journal of Catalysis
Volume	256
Issue number	1
DOIs	https://doi.org/10.1016/j.jcat.2008.03.001
State	Published - 15 May 2008

Keywords

1-Hexene
Cyclohexene
Oxidation
Solvent effect
TS-1
Ti-Beta
Ti-MWW
Titanosilicate

Access to Document

10.1016/j.jcat.2008.03.001

Cite this

@article{f51b27536a244308b1021e79f7967dd9,

title = "Unique solvent effect of microporous crystalline titanosilicates in the oxidation of 1-hexene and cyclohexene",

abstract = "We investigated the influence of solvent on the activity, epoxide selectivity, and H2O2 efficiency of three types of zeolites-TS-1, Ti-Beta, and Ti-MWW-in the liquid-phase epoxidation of 1-hexene and cyclohexene. We found that the effect of solvent not only was related to the hydrophilicity/hydrophobicity of titanosilicates, but also was highly dependent on substrates. Acetonitrile should be the solvent of choice for the oxidation of 1-hexene over Ti-Beta and Ti-MWW, whereas methanol is preferred by TS-1. In contrast, for cyclohexene oxidation, methanol is favorable for Ti-Beta, whereas acetonitrile is the best for TS-1 and Ti-MWW. The effect of hydrophilicity/hydrophobicity is demonstrated by a series of catalytic results, but this cannot explain the solvent effect on the oxidation of cyclohexene over Ti-Beta. The H2O2 efficiency depends strongly on the aprotic/protic nature and polarity of solvents, as well as on the properties of titanosilicates.",

keywords = "1-Hexene, Cyclohexene, Oxidation, Solvent effect, TS-1, Ti-Beta, Ti-MWW, Titanosilicate",

author = "Weibin Fan and Peng Wu and Takashi Tatsumi",

year = "2008",

month = may,

day = "15",

doi = "10.1016/j.jcat.2008.03.001",

language = "英语",

volume = "256",

pages = "62--73",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

number = "1",

}

TY - JOUR

T1 - Unique solvent effect of microporous crystalline titanosilicates in the oxidation of 1-hexene and cyclohexene

AU - Fan, Weibin

AU - Wu, Peng

AU - Tatsumi, Takashi

PY - 2008/5/15

Y1 - 2008/5/15

N2 - We investigated the influence of solvent on the activity, epoxide selectivity, and H2O2 efficiency of three types of zeolites-TS-1, Ti-Beta, and Ti-MWW-in the liquid-phase epoxidation of 1-hexene and cyclohexene. We found that the effect of solvent not only was related to the hydrophilicity/hydrophobicity of titanosilicates, but also was highly dependent on substrates. Acetonitrile should be the solvent of choice for the oxidation of 1-hexene over Ti-Beta and Ti-MWW, whereas methanol is preferred by TS-1. In contrast, for cyclohexene oxidation, methanol is favorable for Ti-Beta, whereas acetonitrile is the best for TS-1 and Ti-MWW. The effect of hydrophilicity/hydrophobicity is demonstrated by a series of catalytic results, but this cannot explain the solvent effect on the oxidation of cyclohexene over Ti-Beta. The H2O2 efficiency depends strongly on the aprotic/protic nature and polarity of solvents, as well as on the properties of titanosilicates.

AB - We investigated the influence of solvent on the activity, epoxide selectivity, and H2O2 efficiency of three types of zeolites-TS-1, Ti-Beta, and Ti-MWW-in the liquid-phase epoxidation of 1-hexene and cyclohexene. We found that the effect of solvent not only was related to the hydrophilicity/hydrophobicity of titanosilicates, but also was highly dependent on substrates. Acetonitrile should be the solvent of choice for the oxidation of 1-hexene over Ti-Beta and Ti-MWW, whereas methanol is preferred by TS-1. In contrast, for cyclohexene oxidation, methanol is favorable for Ti-Beta, whereas acetonitrile is the best for TS-1 and Ti-MWW. The effect of hydrophilicity/hydrophobicity is demonstrated by a series of catalytic results, but this cannot explain the solvent effect on the oxidation of cyclohexene over Ti-Beta. The H2O2 efficiency depends strongly on the aprotic/protic nature and polarity of solvents, as well as on the properties of titanosilicates.

KW - 1-Hexene

KW - Cyclohexene

KW - Oxidation

KW - Solvent effect

KW - TS-1

KW - Ti-Beta

KW - Ti-MWW

KW - Titanosilicate

UR - https://www.scopus.com/pages/publications/43049136258

U2 - 10.1016/j.jcat.2008.03.001

DO - 10.1016/j.jcat.2008.03.001

M3 - 文章

AN - SCOPUS:43049136258

SN - 0021-9517

VL - 256

SP - 62

EP - 73

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

Unique solvent effect of microporous crystalline titanosilicates in the oxidation of 1-hexene and cyclohexene

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this