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    Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures
    4.
    发明授权
    Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures 失效
    从含丁烷二羧酸酯的反应混合物中回收吡啶或甲基吡啶或其混合物

    公开(公告)号：US4810798A

    公开(公告)日：1989-03-07

    申请号：US119493

    申请日：1987-11-12

    申请人： Hubert Lendle ,  Paul Panitz ,  Wilfried Seyfert ,  Peter Stops

    发明人： Hubert Lendle ,  Paul Panitz ,  Wilfried Seyfert ,  Peter Stops

    IPC分类号： B01J38/00 ,  C07B61/00 ,  C07B63/00 ,  C07C67/38 ,  C07C67/48 ,  C07C67/54 ,  C07C67/58 ,  C07C69/40 ,  C07C69/44 ,  C07D213/06 ,  C07D213/16

    CPC分类号： C07C67/58

    摘要： Pyridine or methylpyridines or mixtures thereof are recovered from methyl butanedicarboxylate containing reaction mixtures obtained by reaction of methyl pentenoate with carbon monoxide and methanol in the presence of pyridine, methylpyridines or mixtures thereof and also cobalt catalysts at elevated temperatures and under superatmospheric pressure and subsequent treatment with molecular oxygen containing gases in aqueous acetic acid by(a) separating the reaction mixture on the one hand into an aqueous phase containing cobalt acetate, pyridine, methylpyridines or mixtures thereof, acetic acid and methanol and on the other an organic phase containing methyl butanedicarboxylate, by-products, unconverted methyl pentenoate, acetic acid and also pyridine, methylpyridines or mixtures thereof,(b) extracting the organic phase obtained in step (a) with aqueous acetic acid to obtain an aqueous extract containing pyridine or methylpyridines or mixtures thereof as well as acetic acid,(c) combining the aqueous extract obtained in step (b) with the aqueous phase from step (a) and(d) isolating pyridine, methylpyridines or mixtures thereof by distillation from the aqueous solution produced in step (c) and obtaining a solution of cobalt acetate in aqueous acetic acid.

    摘要翻译： 吡啶或甲基吡啶或其混合物从含有丙烯酸甲酯与一氧化碳和甲醇的吡啶，甲基吡啶或其混合物的存在下反应获得的含丁烷二羧酸甲酯的反应混合物以及钴催化剂在升高的温度和超大气压下进行回收，随后用 （a）将反应混合物一方面分离成含有乙酸钴，吡啶，甲基吡啶或其混合物，乙酸和甲醇的水相，另一方面是含有丁二酸二甲酯的有机相， 副产物，未转化的戊烯酸甲酯，乙酸和吡啶，甲基吡啶或其混合物，（b）用乙酸水溶液萃取步骤（a）中获得的有机相，得到含有吡啶或甲基吡啶或其混合物的含水提取物 作为乙酸，（c）组合 将步骤（b）中获得的含水提取物与步骤（a）的水相和（d）通过蒸馏从步骤（c）中制备的水溶液中分离吡啶，甲基吡啶或其混合物，并获得乙酸钴溶液 乙酸水溶液。

    Purification of carboxylic esters which contain aldehydes, acetals and/or unsaturated compounds
    5.
    发明授权
    Purification of carboxylic esters which contain aldehydes, acetals and/or unsaturated compounds 失效
    含有醛，缩醛和/或不饱和化合物的羧酸酯的纯化

    公开(公告)号：US4946029A

    公开(公告)日：1990-08-07

    申请号：US314952

    申请日：1989-02-24

    申请人： Gerhard Frank ,  Hubert Lendle ,  Wilfried Seyfert ,  Peter Stops

    发明人： Gerhard Frank ,  Hubert Lendle ,  Wilfried Seyfert ,  Peter Stops

    IPC分类号： C07B61/00 ,  B01J23/40 ,  B01J23/44 ,  B01J23/74 ,  B01J29/08 ,  C07C67/38 ,  C07C67/60 ,  C07C69/44

    CPC分类号： C07C67/60

    摘要： Carboxylic esters obtained by reacting olefinically unsaturated compounds with carbon monoxide and alcohols and containing aldehydes, acetals and/or unsaturated compounds are purified by(a) treating the carboxylic ester which contains an aldehyde, acetal or unsaturated compound in a first stage at from 20.degree. to 200.degree. C. with a strongly acidic agent and(b) hydrogenating the mixture thus treated in a second stage at from 50.degree. to 200.degree. C. under a pressure of from 1 to 50 bar in the presence of one or more metals of subgroup VIII of the periodic table and(c) removing low and high boilers from the hydrogenated mixture obtained in stage b by distillation and obtaining a pure carboxylic ester.

    摘要翻译： 通过使烯属不饱和化合物与一氧化碳和醇反应并含醛，缩醛和/或不饱和化合物反应而获得的羧酸酯通过（a）在20℃的第一阶段处理含有醛，缩醛或不饱和化合物的羧酸酯来纯化 至200℃，和（b）在50℃至200℃的第二阶段，在1至50巴的压力下，在一种或多种金属的存在下，将如此处理的混合物氢化为 元素周期表的第VIII族和（c）通过蒸馏从阶段b中获得的氢化混合物中除去低和高的锅炉，得到纯的羧酸酯。