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Anchoring sulfonic acid on silica surface through SiC bond for immobilization of catalyst for polyketone synthesis

Paper ID Volume ID Publish Year Pages File Format Full-Text
53788 46984 2016 7 PDF Available
Title
Anchoring sulfonic acid on silica surface through SiC bond for immobilization of catalyst for polyketone synthesis
Abstract

•Sulfonic acid groups were anchored on a silica surface through robust SiC bonds.•Supported catalyst for polyketone was prepared using the silica tethering the acid.•Supported catalyst exhibited a high activity with morphology control without fouling.

Sulfonic acid groups were anchored on a silica surface through robust SiC bonds. The successive treatment of dehydroxylated silica with benzylmagnesium chloride and H2SO4 resulted in the surface tethering of CH2C6H4SO3H groups at a high coverage rate (0.50-CH2C6H4SO3H/nm2). The pore structure of the silica remained unchanged during this surface-modification process. Next, the CH2C6H4SO3H groups on the surface were successfully used for preparing a supported catalyst for CO/ethylene copolymerization; the ≡SiCH2C6H4SO3H groups on the surface were reacted with [1,3-bis(di(2-methoxyphenyl)phosphino)propane]Pd(OAc)2 to generate dicationic palladium species, which were anchored on the silica surface through ionic interactions with the sulfonate anions generated on the surface. The supported catalyst prepared in this way exhibited a high activity (up to 43 kg/g-Pd or 0.61 kg/g-cat) with respect to CO/ethylene copolymerization. The morphology of the obtained polymer particles replicated that of the silica particles. Thus, a polymer powder that exhibited a high bulk density (0.30 g/mL) could be obtained while causing minimal reactor fouling.

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Keywords
Supported catalyst; Polyketone synthesis; Silica surface modification; Anchoring sulfonic acid
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Anchoring sulfonic acid on silica surface through SiC bond for immobilization of catalyst for polyketone synthesis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 265, 1 May 2016, Pages 77–83
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