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Received September 18, 2012
Accepted October 20, 2012
Available online January 30, 2013
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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디메틸테레프탈레이트와 1,4-부탄디올의 에스테르교환 반응 특성
Transesterification Kinetics of Dimethyl Terephthalate with 1,4-Butanediol
충남대학교 화학공학과, 305-764 대전광역시 유성구 대학로 991 1(주)시온텍, 대전광역시 유성구 용산동 530
Department of Chemical Engineering, Chungnam National University, 991 Daehak-ro, Yuseong-gu, Daejeon 305-764, Korea 1Siontech, 530 Yongsan-dong, Yuseong-gu, Daejeon, Korea
mwhan@cnu.ac.kr
Korean Chemical Engineering Research, February 2013, 51(1), 58-67(10)
https://doi.org/10.9713/kcer.2013.51.1.58
https://doi.org/10.9713/kcer.2013.51.1.58
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Abstract
PBT (polybutylene terephthalate)는 저흡수율, 치수 안정성, 내마모성 등 기계적 특성이 우수하며, 전기전자 부품, 자동차 부품, 각종 정밀 부품에 사용된다. DMT (dimethyl terephthalate)와 BD (1,4-butandiol)를 사용하여 PBT의 원료단량체인 BHBT (bis-hydroxybutyle terephthalate)를 생산하는 에스테르 교환 반응 반응에 대해 연구 하였다. 촉매로는 zinc acetate가 사용되었다. 기존의 연구에서는 반응 중 생성 메탄올이 제거되는 반회분식 반응기를 통한 kinetics 연구가 이루어져 역반응이 고려되지 않음에 따른 모델의 부정확함이 있었다. 본 연구에서는 회분식 반응기를 사용하고 반응 중 DMT와 메탄올 양을 정량하여 생성되는 MHBT (methyl hydroxylbutylene terephthalate)와 BHBT를 추정할 수 있도록 하고, 이 반응들에서 역반응들을 고려할 수 있도록 하여 보다 정확한 모델을 제안하였다. 다양한 반응속도 모델을 제시하였고, 이 모델들이 예측한 값들이 실험 데이터와 잘 일치함을 보였다.
PBT (polybutylene terephthalate) has excellent mechanical properties such as low absorption, dimensional stability, abrasion resistance. It is used in manufacturing electronic components, the automobile part and the various precise parts. Bis (hydroxybutyl) terephthalate (BHBT) which is a PBT monomer, can be produced by transesterification reaction of DMT (dimethyl terephthalate) with 1,4-butandiol (BD). The kinetics of transesterification reaction of DMT with BD using zinc acetate as a catalyst was studied in a batch reactor. Previous kinetic studies was carried out in a semibatch reactor where generated methanol was removed so that reverse reactions were not considered in the kinetic expressions, resulting in inaccuracy of the kinetic model. Mathematical models of a batch reactor for the transesterification reaction were developed and used to characterize the reaction kinetics and the composition distribution of the reaction products. More accurate models than previous models was obtained and found to have a good agreement between model predictions and experimental data.
Keywords
References
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