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Production of diacylglycerols through glycerolysis with SBA-15 supported Thermomyces lanuginosus lipase as catalyst.

Journal of the science of food and agriculture (2019-11-12)
Xihong Zhao, Fenghuan Zhao, Nanjing Zhong
ABSTRACT

In this study, SBA-15 was functionalized by silane coupling reagents, then lipase from Thermomyces lanuginosus (TLL) was immobilized onto the parent and the organically modified SBA-15 for diacylglycerol (DAG) production through glycerolysis. Diacylglycerol content of 54.77 ± 0.63%, and triacylglycerol (TAG) conversion of 77.75 ± 1.24%, were obtained from the parent SBA-15 supported TLL-mediated glycerolysis reaction in a solvent-free system. However, poor performance was unexpectedly observed when co-solvents were introduced into the reaction system. After organic modification, the functionalized SBA-15 supported TLL samples all exhibited reasonable performance, producing DAG content over 40 wt% and TAG conversion over 70 wt%. Higher DAG content, up to 59.19 ± 1.10%, was observed from the phenyl group-modified SBA-15 supported TLL. The operational stability of the immobilized TLL samples in glycerolysis was also improved after organic functionalization. The phenyl group-modified SBA-15 supported TLL showed good reusability in the present glycerolysis reaction, and 95.21 ± 4.87% of the initial glycerolysis activity remained after five cycles of reuse. The organic modification of SBA-15 improved the catalytic performance of its supported TLL in glycerolysis, in terms of TAG conversion, DAG content, and reusability. © 2019 Society of Chemical Industry.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
1,3-Diolein, ≥99% (GC)
Sigma-Aldrich
(3-Mercaptopropyl)triethoxysilane, ≥80% (GC), technical
Sigma-Aldrich
n-Octadecyltriethoxysilane, AldrichCPR
Triolein, European Pharmacopoeia (EP) Reference Standard
Sigma-Aldrich
1-[3-(Trimethoxysilyl)propyl]urea, 97%