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27 条记录 (耗时 0.033 秒)

    Process for the preparation of diaryl carbonates
    11.
    发明授权
    Process for the preparation of diaryl carbonates 失效
    制备碳酸二芳基酯的方法

    公开(公告)号：US5344954A

    公开(公告)日：1994-09-06

    申请号：US103936

    申请日：1993-08-06

    申请人： Norbert Schon ,  Hans-Josef Buysch ,  Paul Wagner ,  Reinhard Langer

    发明人： Norbert Schon ,  Hans-Josef Buysch ,  Paul Wagner ,  Reinhard Langer

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

    CPC分类号： C07C68/06

    摘要： Diaryl carbonates are prepared from dialkyl carbonates and phenolic compounds by transesterification in the presence of a transesterification catalyst at 60.degree.-320.degree. C. in an apparatus composed of two columns in a continuous procedure. In the first column, the starting materials form essentially the associated alkyl aryl carbonate, from which, in the second column, the diaryl carbonate is produced by further transesterification and disproportionation.

    摘要翻译： 碳酸二芳基酯由碳酸二烷基酯和酚类化合物通过在酯交换催化剂存在下，在60-320℃下在连续方法中由两列组成的装置中制备。 在第一列中，起始材料基本上形成缔合的碳酸烷基芳基酯，在第二列中，通过进一步的酯交换和歧化产生碳酸二芳基酯。

    Process for the splitting of polycarbonates
    12.
    发明授权
    Process for the splitting of polycarbonates 失效
    分离聚碳酸酯的方法

    公开(公告)号：US5266716A

    公开(公告)日：1993-11-30

    申请号：US988048

    申请日：1992-12-09

    申请人： Hans-Josef Buysch ,  Norbert Schon ,  Steffen Kuhling

    发明人： Hans-Josef Buysch ,  Norbert Schon ,  Steffen Kuhling

    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。

    Process for the continuous preparation of aryl carbonates
    14.
    发明授权
    Process for the continuous preparation of aryl carbonates 失效
    连续制备碳酸芳基酯的方法

    公开(公告)号：US5523451A

    公开(公告)日：1996-06-04

    申请号：US206575

    申请日：1994-03-04

    申请人： Johann Rechner ,  Norbert Schon ,  Paul Wagner ,  Hans-Josef Buysch ,  Stephan Kabelac

    发明人： Johann Rechner ,  Norbert Schon ,  Paul Wagner ,  Hans-Josef Buysch ,  Stephan Kabelac

    IPC分类号： B01J31/12 ,  B01J10/00 ,  B01J19/24 ,  C07B61/00 ,  C07C68/06 ,  C07C68/08 ,  C07C69/96

    CPC分类号： C07C68/06 ,  B01J19/0066 ,  B01J19/245 ,  B01J2219/00076 ,  B01J2219/00094 ,  B01J2219/00155 ,  B01J2219/00159 ,  B01J2219/00166 ,  B01J2219/00182

    摘要： Organic carbonates which contain at least one aromatic ester group can be obtained continuously from carbonates, which contain at least one aliphatic ester group, and a phenolic compound in the presence of a transesterification catalyst known per se in that the reaction is carried out in a bubble column reactor or in a cascade of at least two bubble column reactors in such a way that the phenolic compound is metered into the first bubble column and the carbonate containing at least one aliphatic ester group is metered into each individual bubble column, but preferably only into the last bubble column. The carbonate containing at least one aromatic ester group is taken off in the liquid state from the last bubble column. Volatile reaction products, for example eliminated alcohol or a dialkyl carbonate are taken off at the upper end of each individual bubble column, preferably at the upper end of the first bubble column.

    摘要翻译： 含有至少一个芳族酯基的有机碳酸酯可以在含有至少一种脂族酯基的碳酸酯和酚类化合物在本身已知的酯交换催化剂的存在下连续获得，因为反应在气泡中进行 塔式反应器或在至少两个鼓泡塔反应器的级联中，使得酚类化合物计量加入到第一气泡塔中，并且含有至少一个脂族酯基的碳酸酯计量加入每个单独的气泡塔中，但优选仅进入 最后一个气泡列。 含有至少一个芳族酯基的碳酸酯从最后一个气泡塔以液态取出。 挥发性反应产物，例如消除的醇或碳酸二烷基酯在每个单独的气泡塔的上端，优选在第一气泡塔的上端取出。

    Process for the production of aryl carbonates
    20.
    发明授权
    Process for the production of aryl carbonates 失效
    制备芳基碳酸酯的方法

    公开(公告)号：US5527942A

    公开(公告)日：1996-06-18

    申请号：US306630

    申请日：1994-09-15

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

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

    IPC分类号： B01J21/06 ,  C07B61/00 ,  C07C68/02 ,  C07C69/96

    CPC分类号： C07C68/02

    摘要： Carbonates with aromatic ester groups can be produced by reaction of aromatic monohydroxy compounds with phosgene or with chloroformic acid esters of aromatic monohydroxy compounds, working at a temperature in the range of 50.degree. to 350.degree. C. in presence of oxides of the metals of Group IV B of the Mendeleeff periodic table as heterogeneous catalysts.

    摘要翻译： 具有芳族酯基的碳酸酯可以通过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的反应来制备，在温度为50-350℃的温度下，在组的金属的氧化物存在下 Mendelée周期表的IV B作为非均相催化剂。