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18.97.9.174
18.97.9.174
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CaCO3 의 분해를 통한 CaO 의 제조시 Ni 의 첨가영향 및 아세톤으로부터 MIBK 의 1단계 합성반응에의 적용
Ni Effect on the Decomposition of CaCO3 into CaO and Its Application to Single Step Synthesis of MIBK from Acetone
고병열 , 허진목 , 이호인 ( Byoung Youl Coh , Jin Mok Hur , Ho In Lee )
응용화학 vol. 2 iss. 1 425-428(4pages)
UCI I410-ECN-0102-2009-570-007308131
This article is 4 pages or less.

Ni effect on the thermal decomposition of CaCO₃ into CaO and its application to single step synthesis of MIBK (methyl isobutyl ketone) from acetone was studied. Bulk calcium acetate decomposed into CaCO₃ and acetone at 450℃, and CaCO₃ into CaO and CO₂ at 700℃. When 2 wt% Ni was incorporated into calcium acetate, the decomposition temperature of CaCO₃ was decreased to 500℃ and, in case of 20 wt% Ni, this phenomenon was more drastic. From X-ray diffraction experiment, we found out that Ni-incorporated CaCO₃ did not decompose directly into CaO but via Ca(OH)₂, and consequently, into CaO. The crystallinity of CaCO₃ affected its decomposition rate. When we used 2 wt% Ni-CaO reduced at 500℃ for single step synthesis of MIBK, 60 ∼ 80% acetone overall conversion and 48∼60% MIBK selectivity were shown. But when the Ni loading was increased to 20 wt%, 73∼82% acetone overall conversion and 13∼16% MIBK selectivity were shown because of the formation of 2-propanol, one of by-products from hydrogenation at Ni site.

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