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公开(公告)号：US5734004A
公开(公告)日：1998-03-31
申请号：US778843
申请日：1997-01-06
CPC分类号： C07C68/08
摘要： The present invention relates to a distillation process for the purification of carbonic acid diaryl esters.
摘要翻译： 本发明涉及一种用于纯化碳酸二芳基酯的蒸馏方法。
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公开(公告)号：US5900501A
公开(公告)日：1999-05-04
申请号：US799299
申请日：1997-02-13
CPC分类号： C07C68/02
摘要： The present invention relates to a process for the continuous production of carbonates having aromatic ester groups by the reaction of aromatic hydroxy compounds with phosgene in the presence of heterogeneous catalysts, phosgene still present being removed from the stream of waste gas by returning the waste gas to an additional reactor.
摘要翻译： 本发明涉及通过芳族羟基化合物与光气在多相催化剂的存在下连续生产具有芳族酯基的碳酸酯的方法，通过将废气返回到废气流中，仍然存在的光气从废气流中除去 一个额外的反应器。
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公开(公告)号：US5710310A
公开(公告)日：1998-01-20
申请号：US690332
申请日：1996-07-25
CPC分类号： C07C68/02
摘要： The present invention relates to a process for the continuous production of diaryl carbonates by reaction of aromatic hydroxy compounds with phosgene in the presence of heterogeneous catalysts.
摘要翻译： 本发明涉及通过芳族羟基化合物与光气在非均相催化剂存在下的反应连续制备碳酸二芳基酯的方法。
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公开(公告)号：US5831111A
公开(公告)日：1998-11-03
申请号：US850474
申请日：1997-05-05
申请人： Pieter Ooms , Eric Bischof , Hans-Josef Buysch , Steffen Kuhling , Gottfried Zaby , Wolfgang Jakob , Jurgen Dahmer , Norbert Schon
发明人： Pieter Ooms , Eric Bischof , Hans-Josef Buysch , Steffen Kuhling , Gottfried Zaby , Wolfgang Jakob , Jurgen Dahmer , Norbert Schon
CPC分类号： C07C68/02
摘要： The present invention relates to a process for the continuous production of carbonates having aromatic ester groups by reacting aromatic hydroxy compounds with phosgene in the gas phase in the presence of heterogeneous catalysts.
摘要翻译： 本发明涉及一种在非均相催化剂存在下，通过气相中芳族羟基化合物与光气反应连续生产具有芳族酯基的碳酸酯的方法。
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公开(公告)号：US5440066A
公开(公告)日：1995-08-08
申请号：US222777
申请日：1994-04-04
IPC分类号： C07B61/00 , C07C37/055 , C07C39/08 , C07C39/15 , C07C39/16 , C07C39/17 , C07C41/26 , C07C43/295 , C07C45/65 , C07C49/83 , C07C68/06 , C07C69/96 , C07C315/04 , C07C317/22 , C07C319/20 , C07C323/20 , C08G64/42 , C08J11/24
CPC分类号： C07C68/06 , C08G64/42 , Y10S203/06
摘要： A continuous process for splitting an aromatic polycarbonate resin is disclosed. Accordingly there are reacted in a distillation column and in the presence of a catalyst(i) a polycarbonate resin in solution with(ii) methanolto produce a dihydroxy compound and dimethyl carbonate. The solution which contains polycarbonate and monohydroxy compound solvent exclusive of methanol is fed into the upper section of said column and the methanol is fed into the lower section of the column. The methanol is fed in the form of a mixture containing methanol and about 1-50 weight percent of dimethyl carbonate. The dimethyl carbonate thus produced is removed from an upper section of the column and the dihydroxy compound is removed from a lower section of the column.
摘要翻译： 公开了一种用于分离芳族聚碳酸酯树脂的连续方法。 因此，在蒸馏塔中和在催化剂（i）溶液中的聚碳酸酯树脂（ii）甲醇存在下反应生成二羟基化合物和碳酸二甲酯。 将含有聚碳酸酯和不含甲醇的单羟基化合物溶剂的溶液进料到所述塔的上部，并将甲醇进料到塔的下部。 甲醇以含有甲醇和约1-50重量％碳酸二甲酯的混合物的形式进料。 从柱的上部除去由此制得的二甲基碳酸酯，并从柱的下部除去二羟基化合物。
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6.发明授权
公开(公告)号：US5391802A
公开(公告)日：1995-02-21
申请号：US76715
申请日：1993-06-14
CPC分类号： C08G64/42 , C07C37/0555 , C07C37/84 , C07C68/06
摘要： A process is disclosed for cleaving polycarbonates into bisphenols and diaryl carbonates by transesterifying with phenols in the presence of catalysts. The process entails isolating bisphenols from the product of the transesterification, and subjecting the remaining mixture which contains phenols and diaryl carbonates to flash distillation. The phenols and diaryl carbonates are distilled off and separated, and the diaryl carbonates are recovered.
摘要翻译： 公开了一种通过在催化剂存在下与酚进行酯交换将聚碳酸酯裂解成双酚和碳酸二芳酯的方法。 该方法需要从酯交换反应产物中分离出双酚，并将含酚和碳酸二芳基酯的剩余混合物进行闪蒸。 蒸馏除去酚类和碳酸二芳基酯，并回收碳酸二芳基酯。
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7.发明授权Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom 失效制备碳酸二芳酯和由其获得的聚碳酸酯的方法
公开(公告)号：US5739258A
公开(公告)日：1998-04-14
申请号：US804287
申请日：1997-03-03
IPC分类号： B01J23/40 , C07B61/00 , C07C68/00 , C07C68/08 , C07C69/96 , C08G64/20 , C08G64/30 , C08G64/36 , C08G64/00
CPC分类号： C08G64/307 , C07C68/005
摘要： The invention relates to a process for preparing a diaryl carbonate by oxidative carbonylation of the basic aromatic hydroxy compound, in which the aromatic hydroxy compound is the one which is eliminated during melt polycondensation of this diaryl carbonate with a bisphenol. Accordingly the invention also relates to the preparation of polycarbonates by melt polycondensation of diaryl carbonates with bisphenols in which the aromatic hydroxy compounds which is eliminated is used again to prepare the diaryl carbonate. In the event that the aromatic hydroxy compound eliminated is also the basic unit in the bisphenol used, proportions of it may be used to prepare both the diaryl carbonate and the bisphenol.
摘要翻译： 本发明涉及通过碱性芳族羟基化合物的氧化羰基化制备碳酸二芳基酯的方法，其中芳族羟基化合物是在该碳酸二芳基酯与双酚的熔融缩聚期间被消除的。 因此，本发明还涉及通过碳酸二芳基酯与双酚的熔融缩聚制备聚碳酸酯，其中除去的芳族羟基化合物再次用于制备碳酸二芳基酯。 在除去芳族羟基化合物也是所用双酚中的基本单元的情况下，其比例可用于制备碳酸二芳基酯和双酚。
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公开(公告)号：US5266716A
公开(公告)日：1993-11-30
申请号：US988048
申请日：1992-12-09
IPC分类号： B29B17/02 , B29K69/00 , C07C27/02 , C07C37/50 , C07C37/52 , C07C39/16 , C07C68/06 , C07C69/96 , C08G64/42 , C08J11/00 , C07C27/26
CPC分类号： C07C37/0555 , C07C68/06 , C08G64/42
摘要： A process for the continuous splitting of polycarbonates into dihydroxy compounds and carbonic acid esters is disclosed. Accordingly there are reacted in a distillation column a polycarbonate resin and a monohydroxy compound in the presence of a transesterification catalyst. The polycarbonate, in molten form or as a solute, is continuously fed into the upper part of the column and the monohydroxy compound in vapor phase is continuously fed into the lower part of the column. The resulting carbonic acid ester and dihydroxy compounds are continuously being removed from the column. The process is eminently suitable for the recycling of polycarbonate waste.
摘要翻译： 公开了将聚碳酸酯连续分裂成二羟基化合物和碳酸酯的方法。 因此，在酯交换催化剂的存在下，在蒸馏塔中使聚碳酸酯树脂和单羟基化合物反应。 将熔融形式或溶质的聚碳酸酯连续地进料到塔的上部，并将气相中的单羟基化合物连续地进料到塔的下部。 所得碳酸酯和二羟基化合物连续地从柱中除去。 该工艺特别适用于回收聚碳酸酯废料。
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公开(公告)号：US5652275A
公开(公告)日：1997-07-29
申请号：US665589
申请日：1996-06-18
申请人： Hans-Josef Buysch , Steffen Kuhling
发明人： Hans-Josef Buysch , Steffen Kuhling
CPC分类号： C08J11/22 , C08G64/30 , C08J2369/00 , Y02W30/706
摘要： The invention relates to a process for the chemical recycling of polycarbonates by catalyzed reaction with diaryl carbonates to oligocarbonates which are crystallized, purified and then polycondensed back to polycarbonates, insoluble constituents optionally being removed before the crystallization step.
摘要翻译： 本发明涉及一种通过与碳酸二芳酯与寡碳酸酯的催化反应进行化学再循环的方法，该聚碳酸酯被结晶，纯化，然后缩聚成聚碳酸酯，在结晶步骤之前任选地除去不溶成分。
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公开(公告)号：US5925791A
公开(公告)日：1999-07-20
申请号：US31964
申请日：1998-02-27
申请人： Hans-Josef Buysch , Christian Laue , Heinrich Konigshofen , Ulrich Notheis , Pieter Ooms , Ursula Pentling
发明人： Hans-Josef Buysch , Christian Laue , Heinrich Konigshofen , Ulrich Notheis , Pieter Ooms , Ursula Pentling
IPC分类号： B01J23/42 , B01J23/44 , C07B61/00 , C07C209/36 , C07C209/60 , C07C211/54 , C07C211/55 , C07C209/30
CPC分类号： C07C209/36
摘要： 4-aminodiphenylamines are produced by hydrogenating nitrobenzene with hydrogen in the presence of bases containing hydroxide and/or oxide groups and heterogeneous catalysts and in the presence of inert aprotic solvents at temperatures of 0 to 200.degree. C. and pressures of 0.1 to 150 bars.
摘要翻译： 在含有氢氧化物和/或氧化物基团和非均相催化剂的碱的存在下，在惰性非质子溶剂存在下，在0-200℃，压力为0.1-150巴的条件下，用氢气还原硝基苯来制备4-氨基二苯胺。
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