fulltext.study @t Gmail

Enhancing the selectivity of Pare-dihydroxybenzene in hollow titanium silicalite zeolite catalyzed phenol hydroxylation by introducing acid–base sites

Paper ID Volume ID Publish Year Pages File Format Full-Text
49567 46753 2016 4 PDF Available
Title
Enhancing the selectivity of Pare-dihydroxybenzene in hollow titanium silicalite zeolite catalyzed phenol hydroxylation by introducing acid–base sites
Abstract

•MgO–Al2O3 mixed oxide has been introduced to the micropores of HTS zeolite by precipitation.•MgO–Al2O3-HTS zeolites are of high p-dihydroxybenzene selectivity in phenol hydroxylation.•Steric hindrance effect plays a role in enhancing the selectivity of para-dihydroxybeneze.•Synergistic effect between base–acid and tetrahedral Ti sites favors the formation of para-isomer.

A facile and effective method for enhancing the selectivity of Pare-dihydroxybenzene in phenol hydroxylation has been developed by introducing acid–base sites (MgO–Al2O3 binary oxide) to the micropores of hollow titanium silicalite (HTS, Ti/Si = 25) zeolite. For MgO–Al2O3 modified HTS zeolites, the biggest ratio of para- to ortho-dihydroxybenzene is over 2, while that is close to 1 for conventional HTS zeolite. The high pare-dihydroxybenzene selectivity is ascribed to the steric hindrance and the synergistic effect between acid–base sites of mixed oxide and tetrahedral framework Ti species in HTS zeolite.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Phenol hydroxylation; HTS zeolite; Para-dihydroxybenzene; Acidic–basic sites
First Page Preview
Enhancing the selectivity of Pare-dihydroxybenzene in hollow titanium silicalite zeolite catalyzed phenol hydroxylation by introducing acid–base sites
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 80, 5 May 2016, Pages 49–52
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us