Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Transesterification of DMT with EG in the Presence of Metal Catalyst

금속촉매하 DMT와 EG간 에스테르교환반응

  • Jung, Byung-Ok (Department of Food Science and Technology, Seoul National University of Technology) ;
  • Choi, Young-Ju (Department of Food Science and Technology, Seoul National University of Technology) ;
  • Kim, Je-Jung (Department of Food Science and Technology, Seoul National University of Technology) ;
  • Chung, Suk-Jin (Department of Food Science and Technology, Seoul National University of Technology) ;
  • Park, Sang-Soon (Department of Food Science and Technology, Seoul National University of Technology) ;
  • Lee, Gyong-Won (Department of Industrial Chemistry, Chungju National University)
  • 정병옥 (서울산업대학교 식품공학과) ;
  • 최영주 (서울산업대학교 식품공학과) ;
  • 김제중 (서울산업대학교 식품공학과) ;
  • 정석진 (서울산업대학교 식품공학과) ;
  • 박상순 (서울산업대학교 식품공학과) ;
  • 이경원 (충주대학교 공업화학과)
  • Received : 1999.07.07
  • Accepted : 1999.08.28
  • Published : 1999.10.10
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Abstract

The transesterification of dimethyl terephthalate(DMT) with ethylene glycol(EG) was kinetically investigated in the temperature range from 190 to $240^{\circ}C$ with and without a zinc acetate(Zn) as a catalyst. The degree of reaction was calculated by the measurement of the quantity of methanol which distilled from the reaction vessel. This distillation made corrections of reactant and catalyst concentrations necessary. The effects of catalyst concentration, molar ratio of DMT and EG, types of metal compounds, and temperature on kinetics were studied. The catalytic activity of various metal compounds was excellent, in order of Ti, Zn, Sn, and Sb. Also the order of activation energy was Zn>Ti>Sn>Sb.

무촉매 또는 촉매 존재하 반응온도 $190{\sim}240^{\circ}C$에서 DMT와 EG간의 에스테르교환반응을 속도론적으로 살펴 보았다. 반응도는 반응기내에서 계외로 유출된 메탄올의 양을 측정함으로써 계산하였다. 이러한 계외로 유출되는 메탄올로 인한 반응물과 촉매량의 보정을 행하였다. 속도론적인 처리를 한 후 촉매농도, 몰비, 촉매종류, 그리고 온도 의존성에 대하여 살펴보았다. 촉매활성은 Ti>Zn>Sn>Sb의 순이었고 활성화에너지 값은 Zn>Ti>Sn>Sb 순으로 나타났다.

Keywords

References

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