利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

37 条记录 (耗时 0.033 秒)

    PROCESSES FOR PURIFYING DIARYL CARBONATES
    23.
    发明申请
    PROCESSES FOR PURIFYING DIARYL CARBONATES 有权
    纯化二氧化碳的方法

    公开(公告)号：US20090137832A1

    公开(公告)日：2009-05-28

    申请号：US12274776

    申请日：2008-11-20

    申请人： Pieter Ooms ,  Johann Rechner ,  Matthias Bohm ,  Andre Dux ,  Kaspar Hallenberger ,  Georg Ronge ,  Johan Vanden Eynde

    发明人： Pieter Ooms ,  Johann Rechner ,  Matthias Bohm ,  Andre Dux ,  Kaspar Hallenberger ,  Georg Ronge ,  Johan Vanden Eynde

    IPC分类号： C07C68/06

    CPC分类号： C07C68/08 ,  B01D3/14 ,  B01D3/141 ,  Y02P20/57 ,  C07C69/96

    摘要： Processes comprising: transesterifying a dialkyl carbonate and an aromatic hydroxyl compound in the presence of a transesterification catalyst to provide a diaryl carbonate product comprising the transesterification catalyst as an impurity; subjecting the diaryl carbonate product to distillation in a first distillation column having an upper part and a lower part, wherein the upper part comprises a rectifying section and the lower part comprises a stripping section; and withdrawing a first sidestream from the first distillation column, wherein the first sidestream comprises a purified diaryl carbonate.

    摘要翻译： 方法包括：在酯交换催化剂存在下酯交换碳酸二烷基酯和芳族羟基化合物，得到包含酯交换催化剂作为杂质的碳酸二芳酯产物; 在具有上部和下部的第一蒸馏塔中对碳酸二芳基酯进行蒸馏，其中上部包括精馏段，下部包含汽提段; 以及从所述第一蒸馏塔排出第一侧流，其中所述第一侧流包含纯化的碳酸二芳基酯。

    Continuous process for the production of carboxylic acid diaryl esters
    24.
    发明授权
    Continuous process for the production of carboxylic acid diaryl esters 失效
    用于生产羧酸二芳基酯的连续方法

    公开(公告)号：US06680400B2

    公开(公告)日：2004-01-20

    申请号：US10015432

    申请日：2001-12-12

    申请人： Wolfgang Alewelt ,  Steffen Kühling ,  Johan Vanden Eynde ,  Dirk Van Meirvenne

    发明人： Wolfgang Alewelt ,  Steffen Kühling ,  Johan Vanden Eynde ,  Dirk Van Meirvenne

    IPC分类号： C07C6996

    CPC分类号： C07C68/02 ,  C07C69/96

    摘要： An improvement to the interfacial boundary process for continuous production of carbonic acid diaryl esters is disclosed. The process that entails a reaction of monophenols in an inert solvent, in the presence of an alkaline solution and a nitrogen base catalyst, is carried out in two stages. In the first stage phosgene, inert solvent and phenol in solution are combined to form a material system and a second stage the reaction to form carbonic acid diaryl ester is completed. The improvement comprising maintaining in the first stage a pH of 11.0 to 12.0 and a temperature below 40° C. and a pH of 7.5-10.5 and a temperature

    摘要翻译： 公开了连续生产碳酸二芳基酯的界面边界方法的改进。 在碱性溶液和氮碱催化剂存在下，在惰性溶剂中引起单酚反应的方法分两个阶段进行。 在第一阶段，将光气中的惰性溶剂和苯酚合并形成物质体系，第二阶段完成形成碳酸二芳基酯的反应。 该改进包括在第一阶段保持pH为11.0至12.0，温度低于40℃，pH为7.5-10.5，温度<50℃。

    Continuous process for producing carbonic acid diaryl ester
    26.
    发明授权
    Continuous process for producing carbonic acid diaryl ester 有权
    生产碳酸二芳酯的连续工艺

    公开(公告)号：US06531623B2

    公开(公告)日：2003-03-11

    申请号：US10028602

    申请日：2001-12-19

    申请人： Andreas Chrisochoou ,  Steffen Kühling ,  Johan Vanden Eynde

    发明人： Andreas Chrisochoou ,  Steffen Kühling ,  Johan Vanden Eynde

    IPC分类号： C07C6996

    CPC分类号： C07C68/02 ,  C07C69/96

    摘要： A two stage interfacial polycondensation process for the production of carbonic acid diaryl ester is disclosed. The invention concerns an improvement to the process that entails forming in a first stage a reaction mixture that contains an inert solvent, at least one monophenol, phosgene, and aqueous alkali hydroxide solution, passing said reaction mixture to a second stage through at least one constriction at a velocity of 3 to 15 m/s under conditions designed to expose the mixture to a pressure drop of 0.1 to 2.5 bar, and in said second stage passing said mixture through at least one dispersing element at a velocity of 2 to 10 m/s under conditions designed to expose the mixture to a pressure drop of 0.1 to 0.5 bar. The resulting product is characterized by its purity and suitability for the manufacture of polycarbonates in the melt transesterification process.

    摘要翻译： 公开了用于生产碳酸二芳基酯的两阶段界面缩聚方法。 本发明涉及改进在第一阶段形成含有惰性溶剂，至少一种单酚，光气和碱金属氢氧化物水溶液的反应混合物的方法，使反应混合物通过至少一个缩颈 在设计为将混合物暴露于0.1至2.5巴的压降的条件下以3至15m / s的速度，并且在所述第二阶段中通过所述混合物通过至少一种分散元件，速度为2至10m / 在设计为将混合物暴露于0.1至0.5巴的压降的条件下。 所得产物的特征在于其在熔融酯交换过程中用于制造聚碳酸酯的纯度和适用性。

    PROCESS FOR CONTINUOUSLY PREPARING DIALKYL CARBONATE
    29.
    发明申请
    PROCESS FOR CONTINUOUSLY PREPARING DIALKYL CARBONATE 审中-公开
    连续制备碳酸氢钾的方法

    公开(公告)号：US20120130110A1

    公开(公告)日：2012-05-24

    申请号：US13280423

    申请日：2011-10-25

    申请人： Pieter Ooms ,  Friedhelm Risse ,  Andre Düx ,  Carsten Buchaly ,  Thomas Pancur ,  Arthur Susanto ,  Georg Ronge ,  Johan Vanden Eynde ,  Wim Wuytack

    发明人： Pieter Ooms ,  Friedhelm Risse ,  Andre Düx ,  Carsten Buchaly ,  Thomas Pancur ,  Arthur Susanto ,  Georg Ronge ,  Johan Vanden Eynde ,  Wim Wuytack

    IPC分类号： C07C68/08

    CPC分类号： C07C68/08 ,  C07C69/96

    摘要： The present invention relates to a process comprising purifying dialkyl carbonates of the formula (II) in one or more columns in the presence of an alkylene oxide of the formula (V) and of an alkyl alcohol of the formula (IV) wherein R1 and R2 represent, independently of one another, linear or branched, substituted or unsubstituted C1-C6-alkyl, R3 and R4 represent, independently of one another, hydrogen, substituted or unsubstituted C1-C4-alkyl, substituted or unsubstituted C2-C4-alkenyl or substituted or unsubstituted C6-C12-aryl, and R5 represents a straight-chain or branched C1-C4-alkyl; and wherein the mean residence time of the dialkyl carbonate in the column(s) is from 0.3 h to 3 h.

    摘要翻译： 本发明涉及一种方法，其包括在式（V）的烯化氧和式（IV）的烷基醇存在下，在一个或多个塔中纯化式（II）的碳酸二烷基酯，其中R 1和R 2 彼此独立地表示直链或支链的取代或未取代的C 1 -C 6烷基，R 3和R 4彼此独立地表示氢，取代或未取代的C 1 -C 4 - 烷基，取代或未取代的C 2 -C 4 - 烯基或 取代或未取代的C 6 -C 12 - 芳基，R 5表示直链或支链C 1 -C 4烷基; 并且其中所述柱中碳酸二烷基酯的平均停留时间为0.3h至3h。