TY - JOUR
T1 - 4-Amino-TEMPO-Immobilized Polymer Monolith
T2 - Preparations, and Recycling Performance of Catalyst for Alcohol Oxidation
AU - Imoto, Tomoki
AU - Matsumoto, Hikaru
AU - Nonaka, Seiya
AU - Shichijo, Keita
AU - Nagao, Masanori
AU - Shimakoshi, Hisashi
AU - Hoshino, Yu
AU - Miura, Yoshiko
N1 - Funding Information:
This work was supported by the JSPS KAKENHI (Grant number: JP19H02766, JP22H05372, JP22H04553 and JP22K19068).
Publisher Copyright:
© 2022 by the authors.
PY - 2022/12
Y1 - 2022/12
N2 - Continuous flow reactors with immobilized catalysts are in great demand in various industries, to achieve easy separation, regeneration, and recycling of catalysts from products. Oxidation of alcohols with 4-amino-TEMPO-immobilized monolith catalyst was investigated in batch and continuous flow systems. The polymer monoliths were prepared by polymerization-induced phase separation using styrene derivatives, and 4-amino-TEMPO was immobilized on the polymer monolith with a flow reaction. The prepared 4-amino-TEMPO-immobilized monoliths showed high permeability, due to their high porosity. In batch oxidation, the reaction rate of 4-amino-TEMPO-immobilized monolith varied with stirring. In flow oxidation, the eluent permeated without clogging, and efficient flow oxidation was possible with residence times of 2–8 min. In the recycling test of the flow oxidation reaction, the catalyst could be used at least six times without catalyst deactivation.
AB - Continuous flow reactors with immobilized catalysts are in great demand in various industries, to achieve easy separation, regeneration, and recycling of catalysts from products. Oxidation of alcohols with 4-amino-TEMPO-immobilized monolith catalyst was investigated in batch and continuous flow systems. The polymer monoliths were prepared by polymerization-induced phase separation using styrene derivatives, and 4-amino-TEMPO was immobilized on the polymer monolith with a flow reaction. The prepared 4-amino-TEMPO-immobilized monoliths showed high permeability, due to their high porosity. In batch oxidation, the reaction rate of 4-amino-TEMPO-immobilized monolith varied with stirring. In flow oxidation, the eluent permeated without clogging, and efficient flow oxidation was possible with residence times of 2–8 min. In the recycling test of the flow oxidation reaction, the catalyst could be used at least six times without catalyst deactivation.
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U2 - 10.3390/polym14235123
DO - 10.3390/polym14235123
M3 - Article
AN - SCOPUS:85143628710
SN - 2073-4360
VL - 14
JO - Polymers
JF - Polymers
IS - 23
M1 - 5123
ER -