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    Preparation of polyaryl ethers with nitrogen compound catalysts
    2.
    发明授权
    Preparation of polyaryl ethers with nitrogen compound catalysts 失效
    用氮化合物催化剂制备聚芳醚

    公开(公告)号：US5298592A

    公开(公告)日：1994-03-29

    申请号：US932991

    申请日：1992-08-20

    申请人： Alexander Aumueller ,  Wolfgang Eberle ,  Gerhard Heinz ,  Bernd Hupfeld ,  Christiane Husemann ,  Juergen Koch ,  Helmut Reichelt

    发明人： Alexander Aumueller ,  Wolfgang Eberle ,  Gerhard Heinz ,  Bernd Hupfeld ,  Christiane Husemann ,  Juergen Koch ,  Helmut Reichelt

    IPC分类号： C08G65/40 ,  C08G75/23

    CPC分类号： C08G75/23 ,  C08G65/4087

    摘要： A process for preparing polyaryl ethers of the formula I or Ia ##STR1## by condensation of at least one appropriate bisphenol with at least one appropriate aromatic dichloride in the presence of an alkali metal carbonate in a dipolar aprotic solvent, is carried out in the presence of a catalyst selected from the alkali metal nitrites and the group of compounds of the formula II ##STR2## where r.sup.1 and r.sup.3 are each hydrogen, C.sub.7 -C.sub.16 -phenylalkyl, C.sub.1 -C.sub.12 -alkoxy, fluorine, chlorine, bromine, iodine or nitro, and R.sup.2 is nitro or nitroso, or ##STR3## where R.sup.4 is hydrogen, C.sub.1 -C.sub.4 alkyl, fluorine, chlorine, bromine or iodine.

    摘要翻译： 通过将至少一种适当的双酚与至少一种适当的芳族二氯化物在碱金属碳酸盐存在下缩合制备式I或Ia的聚芳基醚的方法（图1） 在偶极非质子溶剂中，在选自碱金属亚硝酸盐和式II化合物的组的催化剂存在下进行，其中r1和r3各自为氢，C7-C16 - 苯基烷基，C1- C 12 - 烷氧基，氟，氯，溴，碘或硝基，R 2为硝基或亚硝基，或者其中R 4为氢，C 1 -C 4烷基，氟，氯，溴或碘。

    Process for the preparation of bis(4-hydroxyphenyl) sulfone
    3.
    发明授权
    Process for the preparation of bis(4-hydroxyphenyl) sulfone 失效
    制备BIS（4-羟基苯基）硫醚的方法

    公开(公告)号：US5072049A

    公开(公告)日：1991-12-10

    申请号：US460648

    申请日：1990-01-03

    申请人： Michael Stumpp ,  Peter Neumann ,  Bernd Hupfeld ,  Helmut Reichelt

    发明人： Michael Stumpp ,  Peter Neumann ,  Bernd Hupfeld ,  Helmut Reichelt

    IPC分类号： C07C315/00 ,  C07C317/22

    CPC分类号： C07C315/00

    摘要： A process for the preparation of bis(4-hydroxyphenyl) sulfone by reacting phenol with sulfuric acid at a temperature of from 140.degree. to 230.degree. C., wherein the sulfuric acid is metered in to the phenol only after the reaction temperature has been reached, the phenol and sulfuric acid are used in a molar ratio of from 1:1 to 25:1 and the reaction is carried out in the absence of an inert solvent.

    摘要翻译： 在140〜230℃的温度下，通过苯酚与硫酸反应来制备双（4-羟基苯基）砜的方法，其中只有在达到反应温度之后，将硫酸计量加入到苯酚中 ，苯酚和硫酸的摩尔比为1：1至25：1，反应在不存在惰性溶剂的情况下进行。

    Preparation of 2-(4-hydroxyphenoxy) propionates
    5.
    发明授权
    Preparation of 2-(4-hydroxyphenoxy) propionates 失效
    2-（4-羟基苯氧基）丙酸酯的制备

    公开(公告)号：US5886209A

    公开(公告)日：1999-03-23

    申请号：US708213

    申请日：1996-09-06

    申请人： Thomas Wettling ,  Manfred Dimmler ,  Bernd Hupfeld ,  Jochem Henklemann

    发明人： Thomas Wettling ,  Manfred Dimmler ,  Bernd Hupfeld ,  Jochem Henklemann

    IPC分类号： C07D307/12 ,  C07C67/08 ,  C07C69/712 ,  C07C69/736 ,  C07C69/76

    CPC分类号： C07C69/712 ,  C07C67/08

    摘要： A multi-stage catalytic process for preparing a 2-(4-hydroxyphenoxy)-propionate, especially methyl 2-(4-hydroxyphenoxy)-propionate, with a purity greater than 99% by esterifying the corresponding 2-(4-hydroxyphenoxy)-propionic acid with an excess amount of alcohol, e.g. methyl alcohol, in a series of at least 2 up to 10 sequential stages at temperatures of 20.degree. to 150.degree. C. and pressures of 0.05 to 5 bar in the presence of a distillable acid catalyst such as hydrochloric acid or hydrogen chloride. In a first esterification stage, unreacted alcohol is removed from the ester product in vacuo at temperatures of 30.degree. to 100.degree. C. together with other volatile components, including the acid catalyst. Without a separate purification of the resulting ester as the bottoms product of the first stage, the esterification step is repeated in at least one additional stage. The final ester product of this multi-stage process is characterized by a water content of less than 0.1%, a halide content of less than 100 ppm, an organic halogen content of less than 50 ppm and a content of all other contaminating compounds of less than 0.1%.

    摘要翻译： 通过酯化相应的2-（4-羟基苯氧基）丙酸酯的2-（4-羟基苯氧基） - 丙酸酯，特别是2-（4-羟基苯氧基）丙酸甲酯的纯度大于99％的多阶段催化方法。 丙酸与过量的酒精，例如 甲醇，在20℃至150℃的温度下，在可馏出的酸催化剂如盐酸或氯化氢存在下，在至少2至10个连续阶段的系列中进行。 在第一酯化阶段，在30℃至100℃的温度下，与其它挥发性组分（包括酸催化剂）一起在酯产物中真空除去未反应的醇。 没有单独纯化所得的酯作为第一阶段的底部产物，酯化步骤在至少一个附加阶段中重复。 该多级方法的最终酯产物的特征在于水含量小于0.1％，卤化物含量小于100ppm，有机卤素含量小于50ppm，所有其他污染化合物的含量少 超过0.1％。