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    Process for producing polycarbonate
    3.
    发明授权
    Process for producing polycarbonate 有权
    生产聚碳酸酯的方法

    公开(公告)号：US06703473B2

    公开(公告)日：2004-03-09

    申请号：US10038953

    申请日：2002-01-02

    Applicant: Uwe Hucks ,  Kaspar Hallenberger ,  Silke Kratschmer ,  Michael Prein ,  Steffen Kühling

    Inventor： Uwe Hucks ,  Kaspar Hallenberger ,  Silke Kratschmer ,  Michael Prein ,  Steffen Kühling

    IPC: C08G6400

    CPC classification number: C08G64/406 ,  C08G64/307

    Abstract: An improvement to the melt transesterification reaction of diaryl carbonate with dihydroxy aryl compound is disclosed. The improvement entails the following steps (i) introducing the resulting vapor stream at the mid-height of a first distillation column, and (ii) separating the vapor stream into a top product containing high purity monohydroxy aryl compound and a first bottom product, and (iii) recycling the high purity monohydroxy aryl compound of (ii) to the reaction, and (iv) introducing the first bottom product at mid-height of a second distillation column, and (v) separating said first bottom product into high boiling bottom by-product and overhead remaining constituents, and (vi) introducing the overhead remaining constituents at mid-height of a third distillation column, and (vii) separating said overhead remaining constituents into overhead low-boiling fractions and bottom or product side stream that contains diaryl carbonate product, and (viii) recycling the diaryl carbonate product directly to the transesterification reaction.

    Abstract translation: 公开了碳酸二芳酯与二羟基芳基化合物的熔融酯交换反应的改进。 改进需要以下步骤：（i）将所得蒸汽流引入第一蒸馏塔的中间高度，和（ii）将蒸汽流分离成含有高纯度单羟基芳基化合物和第一底部产物的顶部产物，以及 （iii）将（ii）的高纯度单羟基芳基化合物再循环到反应中，和（iv）在第二蒸馏塔的中间部分引入第一底部产物，和（v）将所述第一底部产物分离成高沸点底部 副产物和塔顶残留组分，和（vi）在第三蒸馏塔的中间高度引入塔顶剩余成分，和（vii）将塔顶剩余组分分离成塔顶低沸点馏分和底部或产物侧流，其含有 碳酸二芳基酯产物，和（viii）将碳酸二芳基酯产物直接再循环到酯交换反应中。

    REGENERATION OF ACIDIC ION EXCHANGERS
    6.
    发明申请
    REGENERATION OF ACIDIC ION EXCHANGERS 失效
    酸性离子交换剂的再生

    公开(公告)号：US20100305365A1

    公开(公告)日：2010-12-02

    申请号：US12784870

    申请日：2010-05-21

    Applicant: Michael Prein ,  Christian Münnich ,  Ulrich Blaschke

    Inventor： Michael Prein ,  Christian Münnich ,  Ulrich Blaschke

    IPC: C07C37/20 ,  B01J38/60 ,  B01J38/62

    CPC classification number: B01J31/10 ,  B01J31/4007 ,  B01J2231/347 ,  C07C37/20 ,  Y02P20/584 ,  C07C39/16

    Abstract: The invention relates to a method for regenerating acidic cation exchangers, which are used as catalysts in the reaction of phenols with aldehydes or ketones to give bisphenols, in particular to give bisphenol A, with acids, with the proviso that, in the method according to the invention, these cation exchangers experience very little mechanical damage due to swelling processes during the regeneration process.

    Abstract translation: 本发明涉及一种用于再生酸性阳离子交换剂的方法，其用作苯酚与醛或酮反应的催化剂，以产生双酚，特别是产生双酚A与酸，条件是在根据 在本发明中，这些阳离子交换剂在再生过程中由于溶胀过程而经历很少的机械损伤。

    Polycarbonates with good wettability
    7.
    发明申请
    Polycarbonates with good wettability 有权
    具有良好润湿性的聚碳酸酯

    公开(公告)号：US20060135735A1

    公开(公告)日：2006-06-22

    申请号：US11312020

    申请日：2005-12-20

    Applicant: Alexander Meyer ,  Helmut Einberger ,  Wolfgang Ebert ,  Michael Prein ,  Wilfried Haese ,  Uli Franz ,  Stephan Konrad

    Inventor： Alexander Meyer ,  Helmut Einberger ,  Wolfgang Ebert ,  Michael Prein ,  Wilfried Haese ,  Uli Franz ,  Stephan Konrad

    IPC: C08G64/00

    CPC classification number: C08G64/12 ,  Y10T428/31504 ,  Y10T428/31507

    Abstract: A polycarbonate resin that after alkaline hydrolysis with sodium hydroxide contain an amount of 0.01 to 150 ppm of carbamate compounds according to formula (1) wherein R1 and R2 independently of one another denote hydrogen or C1-C12-alkyl, or together denote C4-C12-alkylidene, and R3 and R4 independently of one another denote hydrogen, C1-C12-alkyl or phenyl, or together with the carbon atom to which they are bonded form cyclohexyl or trimethylcyclohexyl, said amount measured after alkaline hydrolysis with sodium hydroxide by high pressure liquid chromatography.

    Abstract translation: 用氢氧化钠碱性水解后的聚碳酸酯树脂含有0.01〜150ppm的式（1）的氨基甲酸酯化合物，其中R 1和R 2独立地为1 另一个表示氢或C 1 -C 12 - 烷基，或一起表示C 4 -C 12 - 亚烷基 ，R 3和R 4彼此独立地表示氢，C 1 -C 12 - 烷基或 苯基或与它们键合的碳原子一起形成环己基或三甲基环己基，所述量通过高压液相色谱用氢氧化钠碱化后测量。

    Bisphenol production
    8.
    发明授权
    Bisphenol production 失效
    双酚生产

    公开(公告)号：US06723885B1

    公开(公告)日：2004-04-20

    申请号：US10129757

    申请日：2002-08-26

    Applicant: Frieder Heydenreich ,  Michael Prein ,  Michael Bödiger ,  Rainer Neumann ,  Gerhard Fennhoff ,  Johan Vaes

    Inventor： Frieder Heydenreich ,  Michael Prein ,  Michael Bödiger ,  Rainer Neumann ,  Gerhard Fennhoff ,  Johan Vaes

    IPC: C07C3916

    CPC classification number: C07C37/685 ,  C07C37/74 ,  C07C37/84 ,  C07C39/16

    Abstract: A process for the production of 2,2-bis(4-hydroxyphenyl)propane (BPA) is disclosed. The process that entails reacting acetone with phenol in the presence of cross-linked sulfonated polystyrene resins is characterised in that BPA is separated from the reaction solution downstream of the reaction unit by means of a multi-stage vacuum distillation and a subsequent single- or multi-stage layer crystallisation. The by-product stream with accumulated by-products is returned downstream of the reaction unit.

    Abstract translation: 公开了一种生产2,2-双（4-羟基苯基）丙烷（BPA）的方法。 在交联磺化聚苯乙烯树脂存在下使丙酮与苯酚反应的过程的特征在于通过多级真空蒸馏和后续的单一或多次反应将BPA从反应单元下游的反应溶液中分离出来 阶段结晶。 具有积累的副产物的副产物流返回到反应单元的下游。

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