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Organosilanesulfonic acid-functionalized Zr-TMS catalysts: Synthesis, characterization and catalytic applications in condensation reactions

Paper ID Volume ID Publish Year Pages File Format Full-Text
44026 46000 2006 12 PDF Available
Title
Organosilanesulfonic acid-functionalized Zr-TMS catalysts: Synthesis, characterization and catalytic applications in condensation reactions
Abstract

Organosilanesulfonic acid (–Si–R3S–R4SO3H, OSA)-functionalized mesoporous Zr-TMS (Zr-TMS–Si–R3S–R4SO3H, Zr-TMS–OSA) was synthesized either by post-synthetic modification of Zr-TMS (zirconia-based transition metal oxide mesoporous molecular sieves) with 3-mercaptopropyltrimethoxysilane (3-MPTS) and further with 1,4-butanesultone (1,4-BS) or by in situ one-pot synthesis procedure. A number of physico-chemical characterization techniques have been used to show that the organosilanesulfonic acid groups were anchored on to the walls of Zr-TMS. MCM-41–Si–R3S–R4SO3H-20 (MCM-41–OSA-20) was also prepared by post-synthesis procedure for comparison. Physico-chemical properties of in situ made A-Zr–OSA-20, Zr-TMS–SO3H-20 and MCM-41–OSA-20 were compared with Zr-TMS–OSA catalysts. The catalytic activity of the materials was tested in liquid phase condensation of aniline with p-formaldehyde to 4,4′-diaminodiphenylmethane (4,4′-DADPM). Results showed that Zr-TMS–OSA catalysts were more active than Zr-TMS–SO3H-20, MCM-41–OSA-20 and A-Zr–OSA-20 and more selective than Zr-TMS–SO3H-20 and A-Zr–OSA-20 catalysts.

Keywords
Acid catalyst; Mesoporous ZrO2; Organosilanesulfonic acid; Organic functionalization; Condensation of aniline
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Organosilanesulfonic acid-functionalized Zr-TMS catalysts: Synthesis, characterization and catalytic applications in condensation reactions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 310, 17 August 2006, Pages 79–90
Authors
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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