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195 条记录 (耗时 0.026 秒)

    Process for the preparation of aliphatic carbonates having a six-membered ring
    2.
    发明授权
    Process for the preparation of aliphatic carbonates having a six-membered ring 失效
    制备具有六元环的脂族碳酸酯的方法

    公开(公告)号：US5861107A

    公开(公告)日：1999-01-19

    申请号：US877386

    申请日：1997-06-17

    申请人： Hans-Josef Buysch ,  Gerd Fengler ,  Karl-Heinz Neumann ,  Paul Wagner ,  Martin Melchiors ,  Wieland Hovestadt

    发明人： Hans-Josef Buysch ,  Gerd Fengler ,  Karl-Heinz Neumann ,  Paul Wagner ,  Martin Melchiors ,  Wieland Hovestadt

    IPC分类号： C07D319/06 ,  C09K3/00 ,  C07D321/00

    CPC分类号： C07D319/06

    摘要： The invention relates to a process for the preparation of carbonates having a six-membered ring, of the formula ##STR1## by transesterification of 1,3-propanediol compounds with carbonic acid esters and subsequent distillative depolymerization of the oligo- or polycarbonate initially formed, one or more catalysts from the group consisting of compounds of Sn, Ti or Zr being employed both for the transesterification and for the depolymerization and, if appropriate, the distillation residue is at least partly recycled into the transesterification. Such carbonates having a six-membered ring can furthermore be stabilized against undesirable polymerization by addition of small amounts of acids of sulfur or phosphorus or esters or salts thereof.

    摘要翻译： 本发明涉及一种通过1,3-丙二醇化合物与碳酸酯的酯交换反应制备具有下式（VI）的六元环的碳酸酯的方法，随后将低聚物或聚碳酸酯进行蒸馏解聚 最初形成的一种或多种由Sn，Ti或Zr化合物组成的组的催化剂用于酯交换和解聚，如果合适的话，蒸馏残余物至少部分地被再循环到酯交换中。 具有六元环的这种碳酸酯还可以通过加入少量的硫或磷酸或其酯或其盐来稳定而防止不期望的聚合。

    Process for preparing aryl carbonates
    6.
    发明授权
    Process for preparing aryl carbonates 失效
    制备芳基碳酸酯的方法

    公开(公告)号：US5473094A

    公开(公告)日：1995-12-05

    申请号：US271488

    申请日：1994-07-07

    申请人： Pieter Ooms ,  Norbert Schon ,  Hans-Josef Buysch

    发明人： Pieter Ooms ,  Norbert Schon ,  Hans-Josef Buysch

    IPC分类号： B01J21/04 ,  C07B61/00 ,  C07C68/02 ,  C07C69/96

    CPC分类号： C07C68/02

    摘要： Carbonates with aromatic ester groups may be prepared by reacting aromatic monohydroxy compounds with phosgene or with chloroformates of aromatic monohydroxy compounds, wherein reaction takes place at a temperature in the range 50.degree. to 350.degree. C. in the presence of aluminum oxides as heterogeneous catalysts.

    摘要翻译： 具有芳族酯基的碳酸酯可以通过使芳族单羟基化合物与光气或芳族单羟基化合物的氯甲酸酯反应制备，其中在作为多相催化剂的氧化铝存在下，在50℃至350℃的温度下进行反应。

    Process for the continuous production of aryl carbonates
    10.
    发明授权
    Process for the continuous production of aryl carbonates 失效
    连续生产碳酸芳基酯的方法

    公开(公告)号：US5463102A

    公开(公告)日：1995-10-31

    申请号：US182867

    申请日：1994-01-18

    申请人： Norbert Schon ,  Johann Rechner ,  Paul Wagner ,  Hans-Josef Buysch ,  Hans-Erich Gasche ,  Ricarda Leiberich

    发明人： Norbert Schon ,  Johann Rechner ,  Paul Wagner ,  Hans-Josef Buysch ,  Hans-Erich Gasche ,  Ricarda Leiberich

    IPC分类号： C07B61/00 ,  C07C68/06 ,  C07C68/08 ,  C07C69/96

    CPC分类号： C07C68/06

    摘要： Organic carbonates containing at least one aromatic ester group can be obtained in a continuous manner from carbonates containing at least one aliphatic ester group and a phenolic compound in the presence of a transesterification catalyst known per se by carrying out the reaction in at least two stirred containers connected one behind the other in such a way that, in each case, the phenolic compound is metered in liquid form into the first stirred container and the carbonate containing at least one aliphatic ester group is metered in liquid form into one or more of the stirred containers. The carbonate containing at least one aromatic ester group is removed in liquid form from the last stirred container. Volatile reaction products, for example alcohol which has been cleaved out or a dialkyl carbonate are removed in gaseous form from one or more stirred containers.

    摘要翻译： 含有至少一个芳族酯基的有机碳酸酯可以在本体已知的酯交换催化剂存在下，通过在至少两个搅拌容器中进行反应，以含有至少一种脂肪族酯基和酚类化合物的碳酸酯连续获得 在每种情况下将酚类化合物以液体形式计量到第一搅拌容器中，并且将含有至少一种脂族酯基的碳酸酯以液体形式计量成一个或多个搅拌的 容器 含有至少一个芳族酯基的碳酸酯以液体形式从最后搅拌的容器中除去。 挥发性反应产物，例如已经被裂解的醇或碳酸二烷基酯从一种或多种搅拌容器中以气态形式除去。