公开(公告)号：US08450531B2

公开(公告)日：2013-05-28

申请号：US12979459

申请日：2010-12-28

申请人： Takeyuki Kondo ,  Masayuki Kamikawa ,  Kenichiro Oka ,  Toshiaki Matsuo ,  Masashi Tanto ,  Yasunari Sase ,  Hiroyuki Ito ,  Tomofumi Shiraishi ,  Tsutomu Kawamura ,  Naruyasu Okamoto

发明人： Takeyuki Kondo ,  Masayuki Kamikawa ,  Kenichiro Oka ,  Toshiaki Matsuo ,  Masashi Tanto ,  Yasunari Sase ,  Hiroyuki Ito ,  Tomofumi Shiraishi ,  Tsutomu Kawamura ,  Naruyasu Okamoto

IPC分类号： C07C45/64 ,  C07D307/46 ,  C07H1/00

CPC分类号： C07D307/48 ,  B01F5/0057 ,  B01F5/0615 ,  B01F5/0682 ,  B01F5/0688 ,  C07C45/52 ,  Y02P20/544 ,  C07C47/22

摘要： An object of the present invention is to provide a method for commercially manufacturing acrolein in a large flow rate by making supercritical water and an acid interact with glycerin, wherein by efficiently mixing high-concentration glycerin and supercritical water with each other, the method is made capable of making the synthesis stably proceed with a high yield while the occlusion and abrasion of the pipes and devices due to the generation of by-products are being suppressed. The method for synthesizing acrolein of the present invention is a method for synthesizing acrolein by making supercritical water and an acid interact with glycerin, the method using a reaction apparatus including: a cylindrical mixing flow path for mixing a fluid including glycerin and a fluid including supercritical water with each other; a first inlet flow path, disposed offset from the central axis of the mixing flow path, for making the fluid including glycerin flow into the mixing flow path; and a second inlet flow path, disposed offset from the central axis of the mixing flow path, for making the fluid including supercritical water flow into the mixing flow path, wherein the first inlet flow path and the second inlet flow path are each provided in a plurality of numbers in such a way that the first inlet flow paths and the second inlet flow paths are alternately arranged so as to encircle the central axis of the mixing flow path.

摘要翻译： 本发明的目的是提供一种通过使超临界水和酸与甘油相互作用而大量流动丙烯醛的方法，其中通过将高浓度甘油和超临界水相互有效地混合，制备方法 能够以高产率稳定地进行合成，同时由于副产物的产生而引起的管道和装置的堵塞和磨损被抑制。 本发明的丙烯醛的合成方法是通过使超临界水和酸与甘油相互作用来合成丙烯醛的方法，使用反应装置的方法包括：将含有甘油的液体和包含超临界流体的流体混合的圆筒状混合流路 水相互; 第一入口流动路径，设置为偏离混合流动路径的中心轴线，用于使包含甘油的流体流入混合流动路径; 以及第二入口流动路径，其设置成偏离混合流动路径的中心轴线，用于使包括超临界水流的流体流入混合流动路径，其中第一入口流动路径和第二入口流动路径分别设置在 多个数字，使得第一入口流动路径和第二入口流动路径交替地布置成环绕混合流动路径的中心轴线。

公开(公告)号：US20110160447A1

公开(公告)日：2011-06-30

申请号：US12979459

申请日：2010-12-28

申请人： Takeyuki KONDO ,  Masayuki Kamikawa ,  Kenichiro Oka ,  Toshiaki Matsuo ,  Masashi Tanto ,  Yasunari Sase ,  Hiroyuki Ito ,  Tomofumi Shiraishi ,  Tsutomu Kawamura ,  Naruyasu Okamoto

发明人： Takeyuki KONDO ,  Masayuki Kamikawa ,  Kenichiro Oka ,  Toshiaki Matsuo ,  Masashi Tanto ,  Yasunari Sase ,  Hiroyuki Ito ,  Tomofumi Shiraishi ,  Tsutomu Kawamura ,  Naruyasu Okamoto

IPC分类号： C08B37/00 ,  C07C45/61 ,  C07D307/34

CPC分类号： C07D307/48 ,  B01F5/0057 ,  B01F5/0615 ,  B01F5/0682 ,  B01F5/0688 ,  C07C45/52 ,  Y02P20/544 ,  C07C47/22

摘要： An object of the present invention is to provide a method for commercially manufacturing acrolein in a large flow rate by making supercritical water and an acid interact with glycerin, wherein by efficiently mixing high-concentration glycerin and supercritical water with each other, the method is made capable of making the synthesis stably proceed with a high yield while the occlusion and abrasion of the pipes and devices due to the generation of by-products are being suppressed. The method for synthesizing acrolein of the present invention is a method for synthesizing acrolein by making supercritical water and an acid interact with glycerin, the method using a reaction apparatus including: a cylindrical mixing flow path for mixing a fluid including glycerin and a fluid including supercritical water with each other; a first inlet flow path, disposed offset from the central axis of the mixing flow path, for making the fluid including glycerin flow into the mixing flow path; and a second inlet flow path, disposed offset from the central axis of the mixing flow path, for making the fluid including supercritical water flow into the mixing flow path, wherein the first inlet flow path and the second inlet flow path are each provided in a plurality of numbers in such a way that the first inlet flow paths and the second inlet flow paths are alternately arranged so as to encircle the central axis of the mixing flow path.

摘要翻译： 本发明的目的是提供一种通过使超临界水和酸与甘油相互作用而大量流动丙烯醛的方法，其中通过将高浓度甘油和超临界水相互有效地混合，制备方法 能够以高产率稳定地进行合成，同时由于副产物的产生而引起的管道和装置的堵塞和磨损被抑制。 本发明的丙烯醛的合成方法是通过使超临界水和酸与甘油相互作用来合成丙烯醛的方法，使用反应装置的方法包括：将含有甘油的液体和包含超临界流体的流体混合的圆筒状混合流路 水相互; 第一入口流动路径，设置为偏离混合流动路径的中心轴线，用于使包含甘油的流体流入混合流动路径; 以及第二入口流动路径，其设置成偏离混合流动路径的中心轴线，用于使包括超临界水流的流体流入混合流动路径，其中第一入口流动路径和第二入口流动路径分别设置在 多个数字，使得第一入口流动路径和第二入口流动路径交替地布置成环绕混合流动路径的中心轴线。

公开(公告)号：US20120310016A1

公开(公告)日：2012-12-06

申请号：US13577680

申请日：2010-02-09

申请人： Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Masashi Tanto

发明人： Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Masashi Tanto

IPC分类号： C07C45/00

CPC分类号： B01J8/006 ,  B01J3/008 ,  B01J2219/00006 ,  C07C45/52 ,  C07C45/81 ,  Y02P20/544 ,  C07C47/22

摘要： An object of the present invention is to provide a technology which can suppress the blockage and abrasion of pipes and devices caused by the production of by-products and stably synthesize acrolein at a high yield, under a condition in which energy efficiency is improved by an elevated concentration of glycerol in a reaction liquid, in a process for synthesis of acrolein by reacting supercritical water and an acid with glycerol. An embodiment of the present invention includes: setting a concentration of glycerol in the reaction liquid at 30% by weight or lower; also cooling the reaction liquid to a temperature between a temperature (300° C. or lower) at which the reaction stops and a temperature (100° C. or higher) at which tar contained in the reaction liquid can keep a state in which its viscosity is sufficiently low; then separating and removing carbon particles from the reaction liquid; subsequently cooling the reaction liquid to a temperature which is a boiling point of water or lower and at which the tar component in the reaction liquid does not adhere to devices; and then decompressing the cooled reaction liquid.

摘要翻译： 本发明的目的是提供一种能够抑制副产物生成引起的管道和装置的堵塞和磨损的技术，并且在能够提高能量效率的条件下以高产率稳定地合成丙烯醛 在超临界水和酸与甘油反应合成丙烯醛的方法中，反应液中甘油浓度升高。 本发明的一个实施方案包括：将反应液中甘油的浓度设定为30重量％以下; 还将反应液体冷却至反应停止的温度（300℃以下）和反应液中所含的焦油的温度（100℃以上）可以保持其状态 粘度足够低; 然后从反应液中分离除去碳颗粒; 随后将反应液体冷却至沸点低于水的温度，反应液中的焦油成分不附着在装置上; 然后减压冷却的反应液。

公开(公告)号：US20110269934A1

公开(公告)日：2011-11-03

申请号：US13094929

申请日：2011-04-27

申请人： Toshiaki MATSUO ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Masashi Tanto

发明人： Toshiaki MATSUO ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Masashi Tanto

IPC分类号： C08G63/80 ,  B01J19/18

CPC分类号： C08G63/785 ,  B01F7/042 ,  B01J19/1862 ,  B01J19/20 ,  B01J2219/00083 ,  B01J2219/0009 ,  B01J2219/00094

摘要： An object of the present invention is to provide a reasonable polycondensation step by which an appropriate molecular weight can be obtained and material decomposition associated with thermolysis can be suppressed, so as to contribute to production technology for PTT polymers. The production method for polytrimethylene terephthalate comprises an esterification step and a polycondensation step, wherein the polycondensation step is divided into multiple stages, polycondensation is performed using a polymerization vessel having a twin-shaft agitator in the final stage of the polycondensation step, and the polymerization temperature during the subsequent stage of the polycondensation step is less than the polymerization temperature during the former stage of the polycondensation step.

摘要翻译： 本发明的目的是提供合理的缩聚步骤，通过该步骤可以获得适当的分子量，并且可以抑制与热解相关的材料分解，从而有助于PTT聚合物的生产技术。 聚对苯二甲酸丙二酯的制备方法包括酯化步骤和缩聚步骤，其中缩聚步骤分成多个阶段，在缩聚步骤的最后阶段中使用具有双轴搅拌器的聚合容器进行缩聚，并且聚合 在缩聚步骤的后续阶段期间的温度低于缩聚步骤的前一阶段期间的聚合温度。

公开(公告)号：US08558035B2

公开(公告)日：2013-10-15

申请号：US13148760

申请日：2010-02-05

申请人： Takeyuki Kondo ,  Hiroyuki Ito ,  Naruyasu Okamoto ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa

发明人： Takeyuki Kondo ,  Hiroyuki Ito ,  Naruyasu Okamoto ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa

IPC分类号： C07C45/52 ,  B01J19/00

CPC分类号： B01J3/008 ,  B01J2219/00006 ,  B01J2219/00168 ,  C07C45/52 ,  Y02P20/544 ,  C07C47/22

摘要： In order to perform organic synthesis process through action with supercritical water and acid stably while suppressing a trouble caused by a by-product, a method and an apparatus are provided, including the following steps. Water is supplied to high-pressure pumps (110) and (210) from water headers (101) and (201), and a pressure-reducing valve (324) is regulated to increase the pressure to 35 MPa. Temperatures of preheaters (120) and (220) and a heater (310) are increased until the reaction solution is at a temperature of 400° C. Acid (sulfuric acid) and an organic compound raw material (glycerin) are supplied from an acid header (203) and a raw-material header (203′) for action with the supercritical water to obtain a reaction solution. The obtained reaction solution is cooled to 100 to 200° C. by first cooling (420) and a solid component included in the reaction solution is separated for removal from the reaction solution by a filter (320), and then the reaction solution is cooled to a temperature of about 100° C. or lower by second cooling (620) and pressure thereof is reduced (324). Further, the reaction solution is cooled by third cooling (720) and then a synthesized product (acrolein) is captured.

摘要翻译： 为了通过超临界水和酸稳定地进行有机合成工艺，同时抑制由副产物引起的故障，提供了包括以下步骤的方法和装置。 从集水管（101）和（201）向高压泵（110）和（210）供水，调节减压阀（324）以将压力增加至35MPa。 增加预热器（120）和（220）和加热器（310）的温度，直到反应溶液处于400℃的温度。酸（硫酸）和有机化合物原料（甘油）由酸 标题（203）和原料头（203'），用于与超临界水作用以获得反应溶液。 将得到的反应溶液通过第一次冷却（420）冷却至100〜200℃，分离包含在反应溶液中的固体成分，通过过滤器（320）从反应溶液中除去，然后将反应溶液冷却 通过第二冷却（620）至约100℃或更低的温度，并且其压力降低（324）。 此外，将反应溶液通过第三次冷却（720）冷却，然后捕获合成产物（丙烯醛）。

公开(公告)号：US20110319667A1

公开(公告)日：2011-12-29

申请号：US13148760

申请日：2010-02-05

申请人： Takeyuki Kondo ,  Hiroyuki Ito ,  Naruyasu Okamoto ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa

发明人： Takeyuki Kondo ,  Hiroyuki Ito ,  Naruyasu Okamoto ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa

IPC分类号： C07C45/00 ,  B01J19/00

CPC分类号： B01J3/008 ,  B01J2219/00006 ,  B01J2219/00168 ,  C07C45/52 ,  Y02P20/544 ,  C07C47/22

摘要： In order to perform organic synthesis process through action with supercritical water and acid stably while suppressing a trouble caused by a by-product, a method and an apparatus are provided, including the following steps. Water is supplied to high-pressure pumps (110) and (210) from water headers (101) and (201), and a pressure-reducing valve (324) is regulated to increase the pressure to 35 MPa. Temperatures of preheaters (120) and (220) and a heater (310) are increased until the reaction solution is at a temperature of 400° C. Acid (sulfuric acid) and an organic compound raw material (glycerin) are supplied from an acid header (203) and a raw-material header (203′) for action with the supercritical water to obtain a reaction solution. The obtained reaction solution is cooled to 100 to 200° C. by first cooling (420) and a solid component included in the reaction solution is separated for removal from the reaction solution by a filter (320), and then the reaction solution is cooled to a temperature of about 100° C. or lower by second cooling (620) and pressure thereof is reduced (324). Further, the reaction solution is cooled by third cooling (720) and then a synthesized product (acrolein) is captured.

摘要翻译： 为了通过超临界水和酸稳定地进行有机合成工艺，同时抑制由副产物引起的故障，提供了包括以下步骤的方法和装置。 从集水管（101）和（201）向高压泵（110）和（210）供水，调节减压阀（324）以将压力增加至35MPa。 增加预热器（120）和（220）和加热器（310）的温度，直到反应溶液处于400℃的温度。酸（硫酸）和有机化合物原料（甘油）由酸 标题（203）和原料头（203'），用于与超临界水作用以获得反应溶液。 将得到的反应溶液通过第一次冷却（420）冷却至100〜200℃，分离包含在反应溶液中的固体成分，通过过滤器（320）从反应溶液中除去，然后将反应溶液冷却 通过第二冷却（620）至约100℃或更低的温度，并且其压力降低（324）。 此外，将反应溶液通过第三次冷却（720）冷却，然后捕获合成产物（丙烯醛）。

公开(公告)号：US08742178B2

公开(公告)日：2014-06-03

申请号：US13577680

申请日：2010-02-09

申请人： Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Masashi Tanto

发明人： Takeyuki Kondo ,  Hiroyuki Ito ,  Yasunari Sase ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Masayuki Kamikawa ,  Masashi Tanto

IPC分类号： C07C45/00

CPC分类号： B01J8/006 ,  B01J3/008 ,  B01J2219/00006 ,  C07C45/52 ,  C07C45/81 ,  Y02P20/544 ,  C07C47/22

摘要： An object of the present invention is to provide a technology which can suppress the blockage and abrasion of pipes and devices caused by the production of by-products and stably synthesize acrolein at a high yield, under a condition in which energy efficiency is improved by an elevated concentration of glycerol in a reaction liquid, in a process for synthesis of acrolein by reacting supercritical water and an acid with glycerol. An embodiment of the present invention includes: setting a concentration of glycerol in the reaction liquid at 30% by weight or lower; also cooling the reaction liquid to a temperature between a temperature (300° C. or lower) at which the reaction stops and a temperature (100° C. or higher) at which tar contained in the reaction liquid can keep a state in which its viscosity is sufficiently low; then separating and removing carbon particles from the reaction liquid; subsequently cooling the reaction liquid to a temperature which is a boiling point of water or lower and at which the tar component in the reaction liquid does not adhere to devices; and then decompressing the cooled reaction liquid.

摘要翻译： 本发明的目的是提供一种能够抑制副产物生成引起的管道和装置的堵塞和磨损的技术，并且在能够提高能量效率的条件下以高产率稳定地合成丙烯醛 在超临界水和酸与甘油反应合成丙烯醛的方法中，反应液中甘油浓度升高。 本发明的一个实施方案包括：将反应液中甘油的浓度设定为30重量％以下; 还将反应液体冷却至反应停止的温度（300℃以下）和反应液中所含的焦油的温度（100℃以上）可以保持其状态 粘度足够低; 然后从反应液中分离除去碳颗粒; 随后将反应液体冷却至沸点低于水的温度，反应液中的焦油成分不附着在装置上; 然后减压冷却的反应液。

公开(公告)号：US20120255852A1

公开(公告)日：2012-10-11

申请号：US13437960

申请日：2012-04-03

申请人： Masayuki KAMIKAWA ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Takeyuki Kondo ,  Yasunari Sase ,  Masashi Tanto ,  Hiroyuki Ito

发明人： Masayuki KAMIKAWA ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Takeyuki Kondo ,  Yasunari Sase ,  Masashi Tanto ,  Hiroyuki Ito

IPC分类号： B01D3/14

CPC分类号： C07C45/52 ,  Y02P20/544 ,  C07C47/22

摘要： When obtaining a target substance by gradually cooling the reaction liquid by cooling in a plurality of stages divided in series, and then distilling the cooled reaction liquid by distillation in a plurality of stages divided in series, this method and this apparatus include: circulating a heating medium to be used for cooling in the plurality of the stages by way of; sequentially passing the heating medium toward the most upstream cooling stage from the most downstream cooling stage of the reaction liquid; cooling the heating medium which has been discharged from the most upstream cooling stage by using the heating medium for keeping or raising the temperature of the liquid which has been discharged from the distillation in the plurality of the stages; and returning the cooled heating medium back to the most downstream cooling stage of the reaction liquid.

摘要翻译： 通过以串联分级的多个级的冷却逐渐冷却反应液，然后通过蒸馏分离串联的多个级蒸馏冷却的反应液体来获得目标物质时，该方法和该装置包括：循环加热 用于在多个阶段中用于冷却的介质; 从反应液的最下游冷却阶段依次使加热介质流向最上游的冷却阶段; 通过使用加热介质冷却从最上游的冷却阶段排出的加热介质，用于保持或提高从多级的蒸馏中排出的液体的温度; 并将冷却的加热介质返回到反应液体的最下游冷却阶段。

公开(公告)号：US08604156B2

公开(公告)日：2013-12-10

申请号：US13503078

申请日：2010-10-21

申请人： Masayuki Kamikawa ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Takeyuki Kondo ,  Yasunari Sase ,  Masashi Tanto

发明人： Masayuki Kamikawa ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Takeyuki Kondo ,  Yasunari Sase ,  Masashi Tanto

IPC分类号： C08G63/02

CPC分类号： C08G63/785 ,  B01J19/1862 ,  B01J19/20 ,  B01J2219/00006 ,  B01J2219/00083 ,  C08G63/16

摘要： A device and a method for producing high-quality polybutylene succinate are provided. The method for producing polybutylene succinate comprises the steps of: preparing a raw-material slurry by mixing succinic acid or a derivative thereof with 1,4-butanediol in a raw-material slurry preparation tank; storing the raw-material slurry in a raw-material slurry storage tank while maintaining flowability; carrying out an esterification reaction of the raw-material slurry in an esterification reactor; and synthesizing polybutylene succinate with a polycondensation reaction of the ester in a polycondensation reactor, in which the polycondensation reactor is divided, from the upstream side, into at least an initial polycondensation reactor, an intermediate polycondensation reactor, and a final polycondensation reactor, a catalyst is added in an amount from 1000 ppm to 3000 ppm in relation to succinic acid or a derivative thereof, the reaction time in the intermediate polycondensation reactor ranges from 0.25 hours to 0.75 hours, and the reaction temperature in the final polycondensation reactor ranges from 245° C. to 255° C.

摘要翻译： 提供了一种用于生产高品质聚丁二酸丁二醇酯的装置和方法。 聚丁二酸丁二醇酯的制造方法包括以下步骤：通过在原料浆料制备槽中混合琥珀酸或其衍生物与1,4-丁二醇来制备原料浆料; 将原料浆料储存在原料浆料储罐中同时保持流动性; 在酯化反应器中进行原料浆料的酯化反应; 并将聚缩丁醛琥珀酸酯与缩聚反应器中的缩聚反应器在上游侧分离成至少初始缩聚反应器，中间缩聚反应器和最终缩聚反应器中的催化剂进行缩聚反应， 相对于琥珀酸或其衍生物以1000ppm至3000ppm的量加入，中间缩聚反应器中的反应时间为0.25小时至0.75小时，最终缩聚反应器中的反应温度为245℃ C.至255°C

公开(公告)号：US20120202962A1

公开(公告)日：2012-08-09

申请号：US13503078

申请日：2010-10-21

申请人： Masayuki Kamikawa ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Takeyuki Kondo ,  Yasunari Sase ,  Masashi Tanto

发明人： Masayuki Kamikawa ,  Toshiaki Matsuo ,  Kenichiro Oka ,  Takeyuki Kondo ,  Yasunari Sase ,  Masashi Tanto

IPC分类号： C08G63/16 ,  B01J19/00

CPC分类号： C08G63/785 ,  B01J19/1862 ,  B01J19/20 ,  B01J2219/00006 ,  B01J2219/00083 ,  C08G63/16

摘要： A device and a method for producing high-quality polybutylene succinate are provided. The method for producing polybutylene succinate comprises the steps of: preparing a raw-material slurry by mixing succinic acid or a derivative thereof with 1,4-butanediol in a raw-material slurry preparation tank; storing the raw-material slurry in a raw-material slurry storage tank while maintaining flowability; carrying out an esterification reaction of the raw-material slurry in an esterification reactor; and synthesizing polybutylene succinate with a polycondensation reaction of the ester in a polycondensation reactor, in which the polycondensation reactor is divided, from the upstream side, into at least an initial polycondensation reactor, an intermediate polycondensation reactor, and a final polycondensation reactor, a catalyst is added in an amount from 1000 ppm to 3000 ppm in relation to succinic acid or a derivative thereof, the reaction time in the intermediate polycondensation reactor ranges from 0.25 hours to 0.75 hours, and the reaction temperature in the final polycondensation reactor ranges from 245° C. to 255° C.

摘要翻译： 提供了一种用于生产高品质聚丁二酸丁二醇酯的装置和方法。 聚丁二酸丁二醇酯的制造方法包括以下步骤：通过在原料浆料制备槽中混合琥珀酸或其衍生物与1,4-丁二醇来制备原料浆料; 将原料浆料储存在原料浆料储罐中同时保持流动性; 在酯化反应器中进行原料浆料的酯化反应; 并将聚缩丁醛琥珀酸酯与缩聚反应器中的缩聚反应器在上游侧分离成至少初始缩聚反应器，中间缩聚反应器和最终缩聚反应器中的催化剂进行缩聚反应， 相对于琥珀酸或其衍生物以1000ppm至3000ppm的量加入，中间缩聚反应器中的反应时间为0.25小时至0.75小时，最终缩聚反应器中的反应温度为245℃ C.至255°C