Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14108
Title: Isomerization of alpha-pinene oxide over solid acid catalysts
Authors: D B RAVINDRA AJITH DE SILVA
Keywords: Solid-Acids, micro/mesoporous, B2O3/SiO2, α-pinene oxide, campholenic aldehyde, isomerization
Issue Date: 6-Aug-2004
Source: D B RAVINDRA AJITH DE SILVA (2004-08-06). Isomerization of alpha-pinene oxide over solid acid catalysts. ScholarBank@NUS Repository.
Abstract: A number of solid acid catalysts were prepared. MSU-S aluminosilicates were synthesized using HY and zeolite Beta seeds. These samples had both micropores and mesopores. The surface area of these micro/mesoporous materials was high, in the order of 800-1000 m2/g and about 10 % of the surface area was due to micropores. From pyridine adsorption studies, only Lewis acid sites were present. In B2O3/SiO2 sampples, B2O3 loadings below 15% resulted in only Lewis acidity while at higher loading, Br??nsted acidity was detected. An increse in boron oxide loading decreased the surface area and pore volume. XRD data showed that boria was present in the hydrated form, H3BO3. Both BO4 and BO3 units were detected by 11B-NMR studies. InCl3/Zr(OH)4 was X-ray amorphous and had both Lewis and Br??nsted acidity. MSU-SHY was a good solid acid catalyst for I?-pinene oxide isomerization. HCl-treated MSU-SHY(70) showed 100% selectivity to campholenic aldehyde. B2O3/SiO2 were also promising catalysts for the isomerization. However, the selectivity was lower than the MSU-compounds.
URI: http://scholarbank.nus.edu.sg/handle/10635/14108
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
complete thesis.pdf1.28 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

465
checked on Dec 11, 2017

Download(s)

2,017
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.