Mechanistic Studies of the Catalytic Dehydration of Isobutyl Alcohol on NaH-ZSM-5

DOI: 10.1039/ft9908603473

Source and publish data:

Journal of the Chemical Society - Faraday Transactions p. 3473 - 3485 (1990)

Update date:2022-08-11

Topics:

Authors:

Williams, Carol

Makarova, Marina A.

Malysheva, Ludmila V.

Paukshtis, Eugenii A.

Zamaraev, Kirill I.

Thomas, John M.

Read Full Text PDF DownLoad Join now for total 90,000,000 free articles

Article abstract of DOI:10.1039/ft9908603473

Using in situ FTIR and GC kinetic studies, we have examined the mechanism of dehydration of isobutyl alcohol to butene on well characterized ZSM-5 zeolite (number of active sites determined by various methods.Dehydration takes place on Broensted-acid sites.The kinetics of water evolution from butanol is followed by in situ FTIR and both the rate constant and the activation energy of water evolution are estimated 2 = k₀₂ exp(-E₂/RT), where k₀₂ = 2*10⁹ s^-1 and E₂ = 19 +/- 3 kcal mol^-1>.At low temperatures (45-70 deg C), elimination of water is accompanied by simultaneous formation of isobutyl ether (which at the given temperatures is adsorbed and desorbed with difficulty, but is able to form inside the channels).At higher temperatures (125 deg C), there is a shift in the equilibria of various reaction steps, resulting in the formation of butene.This butene may desorb into the gas phase with traces of ether (in conditions of excess alcohol, flow experiments) or form oligomers which remain adsorbed in the zeolite (no excess of alcohol, static IR experiments).The measured rate constant and activation energy 4 = k₀₄ exp(-E₄/RT), where k₀₄ = 3*10¹⁴ s^-1 and E₄ = 32 +/- 2 kcal mol^-1> for butene formation are effective values, containing contributions from several reaction steps, which explains the rather high value of E₄.

Full text of DOI:10.1039/ft9908603473

View Online / Journal Homepage / Table of Contents for this issue

View Online

Products guided by the article

Product name:ISOBUTYLENE

Cas No:115-11-7

R&D Labs maybe for 115-11-7

Anhui Dexinjia Biopharm Co., Ltd

Contact:+86-531-82375818

Address:9 Hexie Road, kaifaqu, Taihe
Quhua Zhongxing Refrigeration Technology Co.,Ltd.

Contact:+86-5708886618

Address:318 Bulding 2, No.866 Quhua Rd.,Kecheng District
ZCIC INTERNATIONAL LTD

Contact:+86-512-56795332

Address:No227 Shuanglong Rd, Fenghuang, Zhangjiagang
Shanghai Pinewood Fine Chemical Co., Ltd.

website:http://www.pinewoodchem.com

Contact:0086-21-62417129，62414096

Address:Suite B, 27F, No.2, Lane 600, Tianshan Road, Shanghai
HANGZHOU TOYOND BIOTECH CO., LTD

Contact:+86-571-86965177

Address:No. 189, Fengqi East Road, Hangzhou, China

Relevant to this article

Doi:10.1039/F29888400273
()
Copper(II) chelate-bonded magnetite nanoparticles: A new magnetically retrievable catalyst for the synthesis of propargylamines

Doi:10.1016/j.crci.2017.03.010
(2017)
MEHRFACHBINDUNGEN ZWISCHEN HAURTGRUPPENELEMENTEN UND UEBERGANGSMETALLEN. XXXII. INSERTIONS- UND METATHESEREAKTIONEN VON METALLORGANISCHEN EISEN-SELEN-KOMPLEXEN

Doi:10.1016/0022-328X(86)80393-X
(1986)
SO42-/SnO2: Efficient, chemoselective, and reusable catalyst for acylation of alcohols, phenols, and amines at room temperature

Doi:10.1080/00397910701354723
(2007)
Synthetic studies towards daphniyunnine B: Construction of AC bicyclic skeleton with two vicinal all carbon quaternary stereocenters

Doi:10.1016/j.cclet.2019.06.049
(2019)
Controlled synthesis of spin glass nickel oxide nanoparticles and evaluation of their potential antimicrobial activity: A cost effective and eco friendly approach

Doi:10.1039/c3ra42628a
(2013)

Article Doi