NDLI: Generation of Bronsted acidity in AlMCM-41 by sulphation for enhanced liquid phase tert-butylation of phenol

Please wait, while we are loading the content...

Generation of Bronsted acidity in AlMCM-41 by sulphation for enhanced liquid phase tert-butylation of phenol

Content Provider	Semantic Scholar
Author	Nur, Hadi Wong, Ka-Lun Muhid, Mohd Nazlan Mohd Hamdan, Halimaton
Copyright Year	2007
Abstract	AlMCM-41 mesoporous molecular sieve modified by impregnation with sulphuric acid in toluene possesses only Bronsted acid sites. The catalyst exhibits a high catalytic activity for tert-butylation of phenol with high selectivity to 2,4-di-tert-butylphenol in liquid phase. 27 Al MAS NMR study indicates that the modification of AlMCM-41 with sulphuric acid in toluene leaves only octahedrally coordinated Al species. The tetrahedrally coordinated Al species which exist before modification with sulphuric acid in toluene being dealuminated to form extraframework octahedrally coordinated Al species. The mesoporous structure of AlMCM-41 is retained after modification, but pore size decreases by ca. 3 A u by the modification. The active sites are postulated on the basis of XRD, FTIR, 27 Al MAS NMR, TGA, BET analysis and FTIR-pyridine adsorption studies that -OSO3H bonded to octahedrally coordinated Al species. # 2007 Elsevier B.V. All rights reserved.
Starting Page	58
Ending Page	65
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1016/j.apcata.2007.02.001
Volume Number	323
Alternate Webpage(s)	https://works.bepress.com/hadi_nur/22/download/
Alternate Webpage(s)	http://www.hadinur.com/paper/hadi_appcatala2007.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.apcata.2007.02.001
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in