Formation of the CaSnO3 crystalline phase during catalytic aldol condensation of acetone under supercritical conditions

Авторы: Bogdan T.V., Koklin A.E., Mishin I.V., Mashchenko N.V., Smirnov A.V., Savarets A.R., Bogdan V.I.
Журнал: Russian Chemical Bulletin
Том: 71
Номер: 9
Год издания: 2022
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 1
Последняя страница: 10
DOI: 10.1007/s11172-022-3611-2
Аннотация: The aldol condensation of acetone was carried out under the conditions of the supercriticalstate of the reagent (350 C, 8 MPa; 400 C, 12 MPa) on the catalysts prepared bythe thermal treatment of CaSn(OH)6 at 450 and 750 C. The X-ray amorphous phase ofCaSnO3 transforms into crystalline calcium stannate as the thermal treatment temperatureincreases from 450 to 750 C. At 350 C and 8.0 MPa, the selectivity of the reaction tomesityl and isomesityl oxides is about 85% (for both samples), but the conversion of acetoneis much higher on CaSnO3 after it has been thermally treated at 750 C. The reuse broughtabout the transformation of the CaSnO3-450 catalyst. The conversion of acetone increases,and the reaction parameters (conversion and selectivity) reach values characteristic ofCaSnO3-750. The catalyst structures were studied by XRD and scanning and high-resolutiontransmission electron microscopies.
Добавил в систему: Богдан Татьяна Вениаминовна

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