폐폴리에스터 올리고머 재활용을 위한 메탄올리시스 공정 특성 연구

김승겸; 한명완; Seungkyom Kim; Myungwan Han

Korean Chemical Engineering Research, Vol.42, No.1, 53-58, February, 2004

Export Citation

폐폴리에스터 올리고머 재활용을 위한 메탄올리시스 공정 특성 연구

A Methanolysis Process for Recycling Polyester Oligomer Waste

김승겸, 한명완 ^†

충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220

Seungkyom Kim, and Myungwan Han^†

Department of Chemical Engineering, Chungnam National University, 220, Gung-dong, Yuseong-gu, Daejeon 305-764, Korea

E-mail:

초록

폴리에스터 합성공정에서 공정 피치로 방출되는 폐폴리에스터 올리고머 슬러지는 메탄올리시스 해중합 방법에 의하여 디메틸테레프탈레이트(DMT)와 에틸렌글리콜과 같은 원료물질로 재활용 될 수 있다. 본 연구에서는 연속식 메탄올리시스 반응기에서 메탄올 공급량, 메탄올 순도, 반응 온도, 반응 압력, 촉매량 등의 변수들이 DMT 생성 수율에 미치는 영향을 조사하였다. 메탄올 공급량이 많을수록 DMT 수율이 증가하고, 반응온도 250-260 ℃, 반응압력 3-6 기압에서 DMT 생성 수율이 최대가 되는 것으로 나타났다.

Oligomer sludges generated from polyester production line as polyester waste can be recycled to its constituent monomers, that is, dimethyl terephthalate (DMT) and ethylene glycol by methanolysis. We examined the effects of methanol feeding rate, methanol purity, reaction pressure, reaction temperature, and amount of catalyst on DMT production yield in the proposed continuous methanolysis reactor. DMT production yield increases with methanol feeding rate and shows a maximum at reaction temperature 250-260 ℃ and reaction pressure 3-6 atm.

Keywords:DMT;Methanolysis;Recycling;Waste PET

[References]

Mandoki JW, "Depolymerization of Condensation Polymers," U.S. Patent, No. 4,605,762 (1986)
Lamparter RA, "Process for Recovering Terephthalic Acid from Waste Polyethylene Terephthalate," U.S. Patent, No. 4,542,239 (1985)
Everette MR, "Recovery of Methyl Ester of Aromatic Acids and Glycols from Thermoplastic Polyester Scrap," EP Patent, No. 484,963, A2 (1992)
Naujokas AA, Ryan KM, "Recovery Process for Ethylene Glycol and Dimethylterephthate," U.S. Patent, No. 5,051,528 (1991)
Gamble WJ, Naujoksa AA, Debrum BR, "Process of Recovering Components from Scrap Polyester," U.S. Patent, No. 5,298,530 (1994)
Vaidya UR, Nadkarni VM, J. Appl. Polym. Sci., 775 (1988)
Vaidya UR, Nadkarni VM, Ind. Eng. Chem. Res., 194 (1987)
Dimov K, Terlemezyan E, "Catalytic Action of Calcium Acetate and the Manganese Acetate-Sodium Acetate Mixture in the Pre-esterification of Dimethyl Terephthalate with Ethylene Glycol," J. Polym. Sci., Part I 10, 3133 (1972)
Aquado J, Serrano DP, "Feedstock Recycling of Plastic Wastes," RSC Clean Technology Monographs, Royal Society of Chemistry (1999)
Cornell DD, "Depolymerization of PET for Food Packaging," Proc. Cof. Recycling, RETEC, Society Plastic Engineers, June (1993)

[Referenced By]

[Related Articles]

[1] Mandoki JW, "Depolymerization of Condensation Polymers," U.S. Patent, No. 4,605,762 (1986)

[2] Lamparter RA, "Process for Recovering Terephthalic Acid from Waste Polyethylene Terephthalate," U.S. Patent, No. 4,542,239 (1985)

[3] Everette MR, "Recovery of Methyl Ester of Aromatic Acids and Glycols from Thermoplastic Polyester Scrap," EP Patent, No. 484,963, A2 (1992)

[4] Naujokas AA, Ryan KM, "Recovery Process for Ethylene Glycol and Dimethylterephthate," U.S. Patent, No. 5,051,528 (1991)

[5] Gamble WJ, Naujoksa AA, Debrum BR, "Process of Recovering Components from Scrap Polyester," U.S. Patent, No. 5,298,530 (1994)

[6] Vaidya UR, Nadkarni VM, J. Appl. Polym. Sci., 775 (1988)

[7] Vaidya UR, Nadkarni VM, Ind. Eng. Chem. Res., 194 (1987)

[8] Dimov K, Terlemezyan E, "Catalytic Action of Calcium Acetate and the Manganese Acetate-Sodium Acetate Mixture in the Pre-esterification of Dimethyl Terephthalate with Ethylene Glycol," J. Polym. Sci., Part I 10, 3133 (1972)

[9] Aquado J, Serrano DP, "Feedstock Recycling of Plastic Wastes," RSC Clean Technology Monographs, Royal Society of Chemistry (1999)

[10] Cornell DD, "Depolymerization of PET for Food Packaging," Proc. Cof. Recycling, RETEC, Society Plastic Engineers, June (1993)