Bisphenol production
    2.
    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

    IPC分类号: C07C3916

    摘要: 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.

    摘要翻译: 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。

    Process for preparing bis-(4-hydroxyaryl) alkanes
    4.
    发明授权
    Process for preparing bis-(4-hydroxyaryl) alkanes 失效
    制备双(4-羟基芳基)烷烃的方法

    公开(公告)号:US06211417B1

    公开(公告)日:2001-04-03

    申请号:US09341506

    申请日:1999-07-12

    IPC分类号: C07C3916

    CPC分类号: C07C37/20 C07C39/16

    摘要: The present invention relates to a process for the production of bis-(4-hydroxyaryl)-alkanes by a heterogeneously catalyzed reaction of aromatic hydroxy compounds with ketones in at least two reactors connected in series, which, as the reaction progresses, are operated at higher temperatures, wherein the total quantity of ketone is divided between the individual reactors in such a manner that the higher is the temperature of the particular reactor, the smaller is the proportion per reactor, the highest possible reactor loading is maintained and the temperatures and temperature gradients are kept as low as possible.

    摘要翻译: 本发明涉及通过芳族羟基化合物与至少两个串联连接的反应器中的酮的不均匀催化反应生产双 - (4-羟基芳基) - 烷烃的方法,其随着反应进行而在 较高的温度,其中酮的总量在单个反应器之间分开,使得特定反应器的温度越高,每个反应器的比例越小,保持最高可能的反应器负载和温度和温度 梯度保持尽可能低。

    Process for the production of aliphatic-aromatic polycarbonates
    6.
    发明授权
    Process for the production of aliphatic-aromatic polycarbonates 失效
    用于生产脂族 - 芳族聚碳酸酯的方法

    公开(公告)号:US5408027A

    公开(公告)日:1995-04-18

    申请号:US201438

    申请日:1994-02-24

    CPC分类号: C08G64/1608 C08G63/64

    摘要: A process for producing an aliphatic-aromatic polycarbonate is disclosed. The process comprise (A) reacting in an anhydrous neutral solvent (i) an oligocarbonate of diphenol with (ii) an aliphatic dicarboxylic acid, and (B) eliminating the hydrogen chloride and carbon dioxide by-products. The oligocarbonate of diphenol is characterized in that it is terminated by chlorocarbonic acid ester groups. The resins thus prepared are readily molded conventionally.

    摘要翻译: 公开了一种生产脂族 - 芳族聚碳酸酯的方法。 该方法包括(A)在无水中性溶剂(i)中将二酚的低聚碳酸酯与(ii)脂族二羧酸反应,和(B)除去氯化氢和二氧化碳副产物。 二酚的低聚碳酸酯的特征在于它被氯碳酸酯基团封端。 如此制备的树脂通常容易地成型。