Glikozun alkil glikozitlere katalitik dönüşümü

مرکز و کتابخانه مطالعات اسلامی به زبان های اروپایی

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" Glikozun alkil glikozitlere katalitik dönüşümü "
Mutlu, Vahide Nuran Yılmaz, Selahattin

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1059048
Doc. No	:	TL58165
Main Entry	:	Mutlu, Vahide Nuran
Title & Author	:	Glikozun alkil glikozitlere katalitik dönüşümü\ Mutlu, Vahide NuranYılmaz, Selahattin
College	:	Izmir Institute of Technology (Turkey)
Date	:	2020
Degree	:	Ph.D.
student score	:	2020
Note	:	79 p.
Abstract	:	In this study, it was pursued to develop acidic mesoporous catalysts for the synthesis of octyl glucosides. Butyl glucoside synthesis was used for catalyst screening. Tungstophosphoric acid (TPA) incorporated mesoporous silica (TPA-SBA-15), sulfated La incorporated titania-silica (SO4/La-TiO2-SiO2), organosulfonic acid functionalized mesoporous silica (Propyl-SO3-SBA-15), and sulfated mesoporous carbon (SO4/CMK-3) catalysts were prepared for this purpose. The effects of the active species (sulfates, tungstophosphoric acid and organosulfonic acid) and promoter (La) on the catalyst properties and activity were investigated. All the catalysts had mesoporous structure and high surface area. The acidity and acid site character varied depending on the catalyst type and amount of the active sites. La promoter was found effective to enhance the sulfation performance and to improve the stability of sulfates. The TPA-SBA-15 catalysts provided high glucose conversions (over 99%) and butyl glucoside yields (over 95%) due to their acidity, Keggin ion structure and pore size. The SO4/La-TiO2-SiO2 catalysts and SO4/CMK-3 catalysts were also active with glucose conversions of 74.4 % and 70 % respectively. The reaction parameters such as the reaction temperature (117 and 100 oC) and catalyst amount (20 and 30 wt% wrt. glucose) were studied in butyl glucoside synthesis over TPA-SBA-15 and SO4/La-TiO2-SiO2 which were the most active catalysts. These catalysts were found to be reusable in glycosidation with 1-butanol. Octyl glucoside synthesis was carried out via direct glycosidation. The octyl glucoside yields obtained over TPA-SBA-15 and SO4/La-TiO2-SiO2 catalysts were above 55 % and 43 % respectively. The catalysts were found promising for further investigations.
Descriptor	:	Chemical engineering
Added Entry	:	Yılmaz, Selahattin
Added Entry	:	Izmir Institute of Technology (Turkey)