KR970027140A - Method of producing polyester - Google Patents

Method of producing polyester Download PDF

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Publication number
KR970027140A
KR970027140A KR1019950040327A KR19950040327A KR970027140A KR 970027140 A KR970027140 A KR 970027140A KR 1019950040327 A KR1019950040327 A KR 1019950040327A KR 19950040327 A KR19950040327 A KR 19950040327A KR 970027140 A KR970027140 A KR 970027140A
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KR
South Korea
Prior art keywords
inert gas
separation column
transesterification
methanol
terephthalate
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KR1019950040327A
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Korean (ko)
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KR0170924B1 (en
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김남일
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장용균
주식회사 에스케이씨
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Priority to KR1019950040327A priority Critical patent/KR0170924B1/en
Publication of KR970027140A publication Critical patent/KR970027140A/en
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Publication of KR0170924B1 publication Critical patent/KR0170924B1/en

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Abstract

본 발명은 디메틸테레프탈레이트 또는 디메틸-2,6-나프탈렌테레프탈레이트와 에틸렌글리콜로부터 에스테르 교환 반응 및 중축합 반응에 의해 폴리에틸렌 테레프탈레이트 또는 폴리나프탈렌테레프탈레이트를 제조하는 방법에 관한 것으로, 에스테르 교환 반응기(110)로부터 분리 컬럼 (120)에 인입되는 DMT, DM-2, 6-NDC, EG 및 메탄올이 혼합된 혼합 증기에 불활성 기체를 분사시켜 혼합 증기로부터 메탄올을 분리시킨 후 반응계외로 배출시킴으로써 부반응을 억제하고 반응 시간을 단축시켜 전체적으로 반응속도를 향상시킬 수 있다.The present invention relates to a method for preparing polyethylene terephthalate or polynaphthalene terephthalate by transesterification and polycondensation reaction from dimethyl terephthalate or dimethyl-2,6-naphthalene terephthalate and ethylene glycol. Inert gas is injected into the mixed vapor mixed with DMT, DM-2, 6-NDC, EG and methanol introduced into the separation column 120 to separate the methanol from the mixed vapor and then discharged to the outside of the reaction system to suppress side reactions. By shortening the reaction time it is possible to improve the overall reaction rate.

Description

폴리에스테르의 제조 방법Method of producing polyester

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 종래의 폴리에스테르의 제조 방법 중 에스테르 교환 반응 단계의 공정도, 제2도는 본 발명의 폴리에스테르의 제조 방법 중 에스테르 교환 반응 단계의 공정도, 제3도는 본 발명의 제조 방법에 사용되는 분리 컬럼의 내부 구조를 나타내는 모식도, 제4도는 실시예 및 비교예의 방법에서 반응 시간에 따른 메탄올의 유출량을 나타낸 그래프이다.1 is a process diagram of the transesterification step of the conventional polyester production method, FIG. 2 is a process diagram of the transesterification reaction step of the polyester production method of the present invention, Figure 3 is used in the production method of the present invention Schematic diagram showing the internal structure of the separation column, Figure 4 is a graph showing the amount of methanol outflow with the reaction time in the method of Examples and Comparative Examples.

Claims (9)

디메틸테레프탈레이트(DMT) 또는 디메틸-2,6-나프탈렌디카르복실레이트(DM-2,6-NDC)와 에틸렌글리콜(EG)로 부터 에스테르 교환반응 및 중축합 반응에 의해 폴리에틸렌 테레프탈레이트 또는 폴리에틸렌 나프탈레이트를 제조하는 방법에 있어서, 에스테르 교환 반응기(110)로부터 분리 컬럼(120)에 인입된 DMT, DM-2,6-NDC, EG 및 메탄올이 혼합된 혼합 증기에 불활성 기체를 분사시켜 혼합 증기로부터 메탄올을 분리시킨 후 반응계외로 배출시키는 것을 특징으로 하는 방법.Polyethylene terephthalate or polyethylene b by transesterification and polycondensation reaction from dimethyl terephthalate (DMT) or dimethyl-2,6-naphthalenedicarboxylate (DM-2,6-NDC) and ethylene glycol (EG); In the method for preparing phthalate, an inert gas is injected from a mixed vapor by mixing DMT, DM-2,6-NDC, EG and methanol mixed into the separation column 120 from the transesterification reactor 110 to Separating methanol and discharging it out of the reaction system. 제1항에 있어서, 상기 불활성 기체가 질소 또는 아르곤인 것을 특징으로 하는 방법.The method of claim 1 wherein the inert gas is nitrogen or argon. 제1항에 있어서, 상기 불활성 기체의 온도가 70 내지 80℃의 범위인 것을 특징으로 하는 방법.The method of claim 1, wherein the temperature of the inert gas is in the range of 70 to 80 ℃. 제1항에 있어서, 상기 반응계외로 배출되는 메탄올로부터 상기 불활성 기체를 분리하여 반응계로 재순환시키는 것을 특징으로 하는 방법.The method of claim 1, wherein the inert gas is separated from methanol discharged out of the reaction system and recycled to the reaction system. 제1항에 있어서, 상기 불활성 기체를 상기 에스테르 교환 반응기(110) 내부로도 유입시키는 것을 특징으로 하는 방법.The method of claim 1 wherein the inert gas is also introduced into the transesterification reactor (110). 제5항에 있어서, 상기 분리 컬럼(120)과 에스테르 교환 반응기(110) 내부의 압력이 하기 조건을 만족시키는 것을 특징으로 하는 방법: 10torr＜반응기 압력-분리 컬럼 압력＜20torr.6. The process of claim 5, wherein the pressure in the separation column (120) and in the transesterification reactor (110) satisfies the following conditions: 10torr <reactor pressure-separation column pressure <20torr. 제5항에 있어서, 상기 에스테르 교환 반응기(110) 내로 유입되는 상기 불활성 기체의 온도가 하기 조건을 만족시키는 것을 특징으로 하는 방법: 0℃＜에스테르 교환 반응기내의 혼합물의 온도-불활성 기체의 온도＜25℃.6. The method of claim 5, wherein the temperature of the inert gas entering the transesterification reactor 110 satisfies the following conditions: 0 ° C. <temperature of the mixture of the mixture in the transesterification reactor <25 ℃. 제1항에 있어서, 상기 분리 컬럼(120)은 방해판(121:baffle)이 구비된 것을 특징으로 하는 방법.The method of claim 1, wherein the separation column (120) is provided with a baffle (121). 제8항에 있어서, 상기 방해판(121)이 상ㆍ하로 엇갈리게 배치되어 유체의 흐름이 지그재그 형태가 되도록 하는 것을 특징으로 하는 방법.The method of claim 8, wherein the baffle plate (121) is arranged upside down so that the flow of the fluid is in a zigzag form. ※참고사항: 최초출원 내용에 의하여 공개하는 것임.※ Note: This is to be disclosed based on the initial application.
KR1019950040327A 1995-11-08 1995-11-08 Method of manufacturing polyester KR0170924B1 (en)

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KR0170924B1 KR0170924B1 (en) 1999-03-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100325120B1 (en) * 1995-12-27 2002-06-26 구광시 Resin for heat-resistant bottles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100325120B1 (en) * 1995-12-27 2002-06-26 구광시 Resin for heat-resistant bottles

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KR0170924B1 (en) 1999-03-30

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