[특허]Continuous process for preparing poly(butylene terephthalate) oligomer or poly(butylene isophthalate) oligomer

[미국특허] Continuous process for preparing poly(butylene terephthalate) oligomer or poly(butylene isophthalate) oligomer 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08G-063/02
출원번호	US-0561468 (1990-08-01)
발명자 / 주소	Jackson Roy (Wilmington DE) Lowe David J. (Wilmington DE) Stewart Clare A. (Wilmington DE)
출원인 / 주소	E. I. duPont de Nemours and Company (Wilmington DE 02)
인용정보	피인용 횟수 : 39 인용 특허 : 0

초록 ▼

Economic and efficient process for preparing an oligomer of poly(butylene terephthalate) or an oligomer of poly(butylene isophthalate) from a transesterification reaction mass by using a countercurrent column reactor system wherein the transesterification reaction mass is fed into the countercurrent column reactor and continuously flows downward while simultaneously a heated inert gas stream continuously flows upward to scrub out volatiles from the transesterification reaction mass, thereby yielding from the bottom of the countercurrent column reactor an oligomer of poly(butylene terephthalate) or an oligomer of poly(butylene isophthalate) suitable for use in a polycondensation reaction. Butanediol is recycled throughout the process through an absorber column.

대표청구항 ▼

A continuous process for preparing poly(butylene terephthalate) oligomer or poly(butylene isophthalate) oligomer comprising the steps of (a) continuously feeding a reaction mass formed from a prior transesterification stage into the top part of a heated countercurrent column reactor wherein the reaction mass is prepared from a transesterification reaction between butanediol and a dimethyl ester selected from the group consisting of dimethyl terephthalate, dimethyl isophthalate, and mixtures thereof, in the presence of a transesterification catalyst, (b) continuously feeding into the bottom part of the heated countercurrent column reactor a stream of inert gas having a minimum temperature of 225°C., (c) continuously passing the inert gas stream upward through the heated countercurrent column reactor and out the top part of the heated countercurrent column reactor into the bottom part of an absorber while the reaction mass is continuously flowing down and through the heated countercurrent column reactor, thereby forming an oligomer, at a flow rate such that the reaction mass has a residence time in the reactor of at least 5 minutes, (d) continuously feeding butanediol into the top part of the absorber at a temperature lower than that of the inert gas stream incoming at the bottom part of the absorber, (e) continuously passing the inert gas stream upward through the absorber and out the top part of the absorber into a compressor while the butanediol is continuously flowing downward through the absorber, (f) passing the inert gas stream from the compressor into a heat exchanger and recycling it into the bottom part of the countercurrent column reactor, (g) passing the butanediol out the bottom part of the absorber and into a butanediol feed line for use in the prior transesterification stage, and (h) collecting an oligomer of poly(butylene terephthalate) or an oligomer of poly(butylene isophthalate) from the bottom of the countercurrent column reactor.

이 특허를 인용한 특허 (39) 인용/피인용 타임라인 분석

DeBruin, Bruce Roger, Adsorber system to replace water column in a polyester process.
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Bhatia Kamlesh Kumar, Apparatus and process for a polycondensation reaction.
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Bhatia Kamlesh Kumar (Newark DE), Apparatus and process for a polycondensation reaction.
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Warth, Holger; Chen, Sichong; Wang, Yuzhong; Wang, Yanyan; Li, Hongchao, Blend of aromatic polycarbonate and polylactic acid, the method for preparing the same and the use thereof.
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Yount, Thomas Lloyd; DeBruin, Bruce Roger; Windes, Larry Cates; Flores, Roy Douglas; White, Alan Wayne; Bellner, Steven Paul, Horizontal trayed reactor.
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Weaver, Max Allen; Pearson, Jason Clay; Blakely, Dale Milton; Colhoun, Frederick Leslie, Method for incorporating nitrogen containing methine light absorbers in PET and compositions thereof.
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Weaver,Max Allen; Pearson,Jason Clay; Blakely,Dale Milton; Colhoun,Frederick Leslie, Method for incorporating nitrogen containing methine light absorbers in pet and compositions thereof.
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Yount, Thomas Lloyd; DeBruin, Bruce Roger; Ekart, Michael Paul; Windes, Larry Cates; Sliger, David Allen, Multi-level tubular reactor with dual headers.
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DeBruin, Bruce Roger; Ekart, Michael Paul; Yount, Thomas Lloyd; Windes, Larry Cates; Sliger, David Allen, Multi-level tubular reactor with internal tray.
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Yount, Thomas Lloyd; DeBruin, Bruce Roger; Ekart, Michael Paul; Windes, Larry Cates; Sliger, David Allen, Multi-level tubular reactor with oppositely extending segments.
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Yount, Thomas Lloyd; DeBruin, Bruce Roger; Ekart, Michael Paul; Windes, Larry Cates; Sliger, David Allen, Multi-level tubular reactor with vertically spaced segments.
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DeBruin, Bruce Roger, Polyester process using a pipe reactor.
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DeBruin, Bruce Roger, Polyester process using a pipe reactor.
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DeBruin, Bruce Roger, Polyester process using a pipe reactor.
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DeBruin, Bruce Roger, Polyester process using a pipe reactor.
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DeBruin, Bruce Roger, Polyester process using a pipe reactor.
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DeBruin, Roger Bruce, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger; Bonner,Richard Gill, Polyester process using a pipe reactor.
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DeBruin,Bruce Roger; Martin,Daniel Lee, Polyester process using a pipe reactor.
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Debruin, Bruce Roger, Polyester process using a pipe reactor.
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DeBruin, Bruce Roger, Polyester production system employing horizontally elongated esterification vessel.
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DeBruin, Bruce Roger, Polyester production system employing hot paste to esterification zone.
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DeBruin, Bruce Roger, Polyester production system employing recirculation of hot alcohol to esterification zone.
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Bhatia Kamlesh Kumar, Polyesters production process.
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Bhatia Kamlesh Kumar (Newark DE), Polyesters production process.
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Murdaugh, Sr., Perry Michael; Howell, Jr., Earl Edmondson; Wells, Cory Lee; Weaver, Max Allen; Pearson, Jason Clay, Process for adding methine UV light absorbers to PET prepared by direct esterification.
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Schulz Van Endert, Eike, Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures thereof and an apparatus therefor.
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Van Endert, Eike Schulz, Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures thereof and an apparatus therefor.
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White,Alan Wayne; Ekart,Michael Paul; Windes,Larry Cates; Bonner,Richard Gill; Wonders,Alan George, Process for production of a polyester product from alkylene oxide and carboxylic acid.
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Sunkara, Hari B.; Manzer, Leo E., Production of polytrimethylene ether glycol and copolymers thereof.
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DeBruin, Bruce Roger; Yount, Thomas Lloyd; Windes, Larry Cates; Moyer, Wesley Thomas, Reactor system with optimized heating and phase separation.
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DeBruin, Bruce Roger; Ekart, Michael Paul; Windes, Larry Cates, Sloped tubular reactor with divided flow.
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Windes, Larry Cates; DeBruin, Bruce Roger; Ekart, Michael Paul, Sloped tubular reactor with spaced sequential trays.
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Continuous process for preparing poly(butylene terephthalate) oligomer or poly(butylene isophthalate) oligomer 원문보기