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21. 发明专利

JP2011207822A Method for producing bis(2-hydroxyethyl)terephthalate from polyester 审中-公开
标题翻译：从聚酯制造双（2-羟基乙基）癸酸酯的方法
公开(公告)号：JP2011207822A
公开(公告)日：2011-10-20
申请号：JP2010077706
申请日：2010-03-30
申请人： Teijin Ltd , 帝人株式会社
发明人： MORI TAIZO , ISHIHARA KENICHI
IPC分类号： C07C67/29 , C07B61/00 , C07C67/54 , C07C69/82 , C08J11/24
CPC分类号： Y02W30/706
摘要： PROBLEM TO BE SOLVED: To provide a method for producing bis(2-hydroxyethyl)terephthalate from a polyester, by which the bis(2-hydroxyethyl)terephthalate having a high quality and a low acid value can stably be produced from the polyester containing polyethylene terephthalate as a main component and having an average water content of 0.5 to 3.0 wt.%.SOLUTION: The method for producing the bis(2-hydroxyethyl)terephthalate from the polyester containing polyethylene terephthalate as a main component and having an average water content of 0.5 to 3.0 wt.% is characterized by sequentially comprising the following stepes (a) to (b): the step (a): a step of depolymerizing the polyester with ethylene glycol at a temperature of 170 to 280°C; and the step (b): a step of distilling off the ethylene glycol from the depolymerization reaction product obtained in the step (a) at pressure of 20.0 to 60.0 kPa, until a difference between the weight of the ethylene glycol added in the step (a) and the weight of the ethylene glycol distilled off gives a weight ratio of 0.3 to 2.0 to the polyester added in the step (a), wherein the amount of the ethylene glycol distilled off in the step (b) is ≥5.0 wt.% on the basis of the depolymerization product obtained in the step (a).
摘要翻译：要解决的问题：提供从聚酯制备双（2-羟乙基）对苯二甲酸酯的方法，通过该方法可以从含聚乙烯的聚酯中稳定地制备具有高质量和低酸值的双（2-羟乙基）对苯二甲酸酯对苯二甲酸酯为主要成分，平均含水量为0.5-3.0重量％溶液：由聚对苯二甲酸乙二醇酯作为主要成分的聚酯制成双（2-羟乙基）对苯二甲酸酯，其平均含水量为其特征在于依次包括以下步骤（a）至（b）：步骤（a）：在170-280℃的温度下使聚乙烯与乙二醇解聚的步骤; 和步骤（b）：将步骤（a）中获得的解聚反应产物的乙二醇在20.0至60.0kPa的压力下蒸馏除去直至步骤中加入的乙二醇的重量 a），蒸馏出的乙二醇的重量与步骤（a）中加入的聚酯的重量比为0.3-2.0，其中在步骤（b）中蒸馏的乙二醇的量为≥5.0wt。基于步骤（a）中获得的解聚产物。

22. 发明专利

JP2011184302A Method for producing aromatic dicarboxylic ester 审中-公开
标题翻译：生产芳香二羧酸酯的方法
公开(公告)号：JP2011184302A
公开(公告)日：2011-09-22
申请号：JP2010047769
申请日：2010-03-04
申请人： Teijin Ltd , 帝人株式会社
发明人： SUZUKI HIROKI , ISHIHARA KENICHI
IPC分类号： C07C67/02 , C07C69/82
摘要： PROBLEM TO BE SOLVED: To provide a method for producing an aromatic dicarboxylic ester, comprising reacting an aromatic dicarboxylic acid with an alkylene glycol to produce the bishydroxyalkylene aromatic dicarboxylate, and then reacting the bishydroxyalkylene aromatic dicarboxylate with an alcohol to produce the aromatic dicarboxylic ester, by which the reaction time can be shortened.
SOLUTION: The method for producing the aromatic dicarboxylic ester includes reacting the aromatic dicarboxylic acid having an average particle diameter of 20 to 100 μm with the alkylene glycol to produce the bishydroxyalkylene aromatic dicarboxylate, subjecting the bishydroxyalkylene aromatic dicarboxylate to a transesterification reaction with the alcohol, and further washing the product of the transesterification reaction with alcohol.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种芳族二羧酸酯的制备方法，其包括使芳族二羧酸与亚烷基二醇反应以制备芳族二烯基二羧酸二羟基亚烷基酯，然后使芳族二烯基芳族二羧酸二醇与醇反应以产生芳族二羧酸酯，可以缩短反应时间。解决方案：芳族二羧酸酯的制备方法包括使平均粒径为20-100微米的芳族二羧酸与亚烷基二醇反应，生成双羟基亚烷基芳族二羧酸酯，将二异氰酸芳族二羧酸酯与芳基二羧酸酯进行酯交换反应，酒精，并进一步用乙醇洗涤酯交换反应产物。版权所有（C）2011，JPO＆INPIT

23. 发明专利

JP2002220362A DIMETHYL TEREPHTHALATE COMPOSITION AND ITS PRODUCING METHOD 审中-公开
公开(公告)号：JP2002220362A
公开(公告)日：2002-08-09
申请号：JP2001307289
申请日：2001-10-03
申请人： TEIJIN LTD
发明人： ISHIHARA KENICHI , MIZUNO KAZUMASA , NAKAJIMA MINORU , SATO KAZUHIRO
IPC分类号： C07C67/03 , C07C69/82
摘要： PROBLEM TO BE SOLVED: To provide a dimethyl terephthalate composition of which the characteristic as a raw material for polyester is improved, and its producing method. SOLUTION: 4-(1,3-dioxoran-2-yl) Methyl benzoate of 0.001-200 ppm and hydroxy dimethyl terephthalate of 0-1 ppm are added to dimethyl terephthalate.

24. 发明专利

JP2002161064A TEREPHTHALIC ACID COMPOSITION 失效
公开(公告)号：JP2002161064A
公开(公告)日：2002-06-04
申请号：JP2000360664
申请日：2000-11-28
申请人： TEIJIN LTD
发明人： MIZUNO KAZUMASA , ISHIHARA KENICHI , NAKAJIMA MINORU , SATO KAZUHIRO
IPC分类号： G01N31/00 , C07C51/09 , C07C63/26 , G01N33/44
摘要： PROBLEM TO BE SOLVED: To provide a terephthalic acid composition which enables identification and judgement between terephthalic acid recovered from a polyester and virgin terephthalic acid newly produced from para-xylene. SOLUTION: This terephthalic acid composition obtained by adding and homogeneously dispersing the isomer compound of terephthalic acid as a label compound to terephthalic acid recovered from the polyester enables identification and judgement between the terephthalic acid recovered from the polyester and virgin terephthalic acid newly produced from para-xylene.

25. 发明专利

JP2000212326A RECOVERY OF DIMETHYL TEREPHTHALATE 失效
公开(公告)号：JP2000212326A
公开(公告)日：2000-08-02
申请号：JP1413899
申请日：1999-01-22
申请人： TEIJIN LTD
发明人： ISHIHARA KENICHI , ISHIDA KENJI , HASEGAWA HIDEO
IPC分类号： B09B3/00 , C08J11/16 , C08J11/26
摘要： PROBLEM TO BE SOLVED: To provide a method for efficiently recovering dimethyl terephthalate from a mixture of a chlorine-containing resin with a polyalkylene terephthalate. SOLUTION: This method for recovering dimethyl terephthalate comprises melting a mixture of a chlorine-containing resin with a polyalkylene terephthalate in the presence of dimethyl terephthalate and an alkali metal salt and/or an alkaline earth metal salt at a temperature of 275-400 deg.C, removing the generated organic chlorocompounds, and then depolymerizing the residue to recover the dimethyl terephthalate.

26. 发明专利

JP2001151934A RECOVERING METHOD OF VALUABLE COMPONENTS FROM POLYESTER WASTE 失效
公开(公告)号：JP2001151934A
公开(公告)日：2001-06-05
申请号：JP2000112093
申请日：2000-04-13
申请人： TEIJIN LTD
发明人： ISHIHARA KENICHI , ISHIDA KENJI , HASEGAWA HIDEO , SATO KAZUHIRO
IPC分类号： C08J11/24 , B01J27/232 , C08J11/16
摘要： PROBLEM TO BE SOLVED: To provide a recovering method of DMT and EG having a quality usable as a raw material of a polymer from a polyester waste comprising a polyester mixture containing at least polybuthylene terephthalate. SOLUTION: The recovering method of valuable components from a polyester waste comprises depolymerization reacting the polyester waste comprising the polyester mixture containing at least polybuthylene terephthalate in the presence of a depolymerization catalyst using ethylene glycol at 180-300 deg.C, removing tetrahydrofuran and water which occur by converting a 1,4-butanediol skeleton while the depolymerization reaction is performed, then substitution esterifying reactants in the presence of a substitution esterification catalyst using methyl alcohol, and further separating and purifying the resulting products to recover the dimethyl terephthalate and the ethylene glycol.

27. 发明专利

JPH10287741A METHOD FOR RECOVERING DIMETHYL TEREPHTHALATE FROM POLYALKYLENE TEREPHTHALATE 失效
公开(公告)号：JPH10287741A
公开(公告)日：1998-10-27
申请号：JP9882997
申请日：1997-04-16
申请人： TEIJIN LTD
发明人： ISHIHARA KENICHI , ISHIDA KENJI , HASEGAWA HIDEO
IPC分类号： C08G63/183 , C08G63/90
摘要： PROBLEM TO BE SOLVED: To provide a chemical recycling method whereby DMT and an alkylene glycol are efficiently recovered by treating waste PET with methanol. SOLUTION: In recovering dimethyl terephthalate from a polyalkylene terephthalate polymer, dimethyl terephthalate and an alkylene glycol both formed by the depolymn. of the polymer are removed together with unreacted methanol from the reaction system while methanol is continuously introduced into the polymer in the at least partially molten state. In separately recovering dimethyl terephthalate, the alkylene glycol, and unreacted methanol, the reaction is conducted by adding an alkali metal compd. catalyst having a depolymn. activity in such an amt. that the total amt. (by g-mol) of an alkali metal contained in the catalyst is at least the same as that of a depolymn.-inhibiting substance in the reaction system.

28. 发明专利

JP2002060369A METHOD FOR RECYCLING POLYESTER WASTE 失效
公开(公告)号：JP2002060369A
公开(公告)日：2002-02-26
申请号：JP2000247235
申请日：2000-08-17
申请人： TEIJIN LTD
发明人： ISHIHARA KENICHI , NAKAJIMA MINORU , SATO KAZUHIRO
IPC分类号： C08J11/24 , B01J27/232 , C07C51/09 , C07C63/26
摘要： PROBLEM TO BE SOLVED: To provide a method for recycling a polyester waste, by which highly pure terephthalic acid as a valuable component can be recovered from the polyester waste containing polyethylene terephthalate as a main component. SOLUTION: This method for recycling the polyester waste is characterized by subjecting the polyester waste containing a polyalkylene terephthalate as a main component to a glycolysis reaction, a transesterification reaction, a recrystallization process, and a purification treatment to obtain the pure dimethyl terephthalate, and then hydrolyzing the pure dimethyl terephthalate under pressurized steam to recover the highly pure terephthalic acid as a valuable substance.

29. 发明专利

JP2001294553A METHOD FOR RECOVERING VALUABLE COMPONENT FROM POLYESTER WASTE 失效
公开(公告)号：JP2001294553A
公开(公告)日：2001-10-23
申请号：JP2000113054
申请日：2000-04-14
申请人： TEIJIN LTD
发明人： ISHIHARA KENICHI , ISHIDA KENJI , SATO KAZUHIRO
IPC分类号： C08J11/24 , C07B61/00 , C07C51/09 , C07C63/26 , C07C67/02 , C07C67/03 , C07C69/82
摘要： PROBLEM TO BE SOLVED: To provide a method for recovering highly purified dimethyl terephthalate as a valuable component from polyester wastes containing copolyesters. SOLUTION: This method comprises depolymerizing polyester wastes containing at least copolyesters and composed mainly of polyethylene terephthalate by using ethylene glycol, recrystallizing dimethyl terephthalate to obtain its cake from a mixture composed substantially of dimethyl terephthalate obtained by substituting esterification, copolymer components in copolymerized polyesters, methanol and ethylene glycol, and washing the cake with a solvent having higher solubility for the copolymer components than that for dimethyl terephthalate to purify the dimethyl terephthalate.

30. 发明专利

JP2000297178A METHOD FOR RECOVERING DIMETHYL TEREPHTHALATE 失效
公开(公告)号：JP2000297178A
公开(公告)日：2000-10-24
申请号：JP10534199
申请日：1999-04-13
申请人： TEIJIN LTD
发明人： ISHIHARA KENICHI , ISHIDA KENJI , HASEGAWA HIDEO
IPC分类号： C08J11/16 , C07C67/03 , C07C69/82 , C08G63/183 , C08J11/24
摘要： PROBLEM TO BE SOLVED: To provide a method for efficiently recovering dimethyl terephthalate and an alkylene glycol from a mixture of a chlorine-containing resin with a polyalkylene terephthalate. SOLUTION: A mixture of a chlorine-containing resin with a polyalkylene terephthalate is melted in the presence of dimethyl terephthalate and a zinc composition at a temperature of 275-400 deg.C, and the formed methyl chloride is removed and then, methanol depolymerization is conducted to recover dimethyl terephthalate and an alkylene glycol. Preferably, the polyalkylene terephthalate is a polyethylene terephthalate, and the chlorine-containing resin is preferably a poly(vinyl chloride).

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