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1. 发明授权

US4308112A Process for the isolation of pyrocatechol and hydroquinone 失效
标题翻译：分离焦儿茶酚和氢醌的方法
公开(公告)号：US4308112A
公开(公告)日：1981-12-29
申请号：US166270
申请日：1980-07-02
申请人： Christoph Jupe , Jurgen Baumert , Gunter Schummer
发明人： Christoph Jupe , Jurgen Baumert , Gunter Schummer
IPC分类号： C07C27/00 , C07C37/74 , C07C39/08 , C07C67/00 , B01D3/10
CPC分类号： C07C37/74 , C07C37/685
摘要： A process is described for the isolation of pyrocatechol and hydroquinone from mixtures containing the same, and phenol and higher boiling accompanying substances. The mixture can be one obtained by reacting phenol with a peroxidic hydroxylating agent and removing some of the phenol and the substances which have a lower boiling point than phenol. The mixture is subjected to a first rectification in which phenol and substances which have a boiling point between phenol and pyrocatechol are obtained overhead to leave behind a bottom product containing pyrocatechol and hydroquinone. The bottom product is subjected to a second rectification in which the pyrocatechol is obtained overhead to leave behind a bottom product containing hydroquinone and higher boiling accompanying substances. This bottom product is fed to a concentrating unit in which hydroquinone is evaporated overhead to leave behind high boiling accompanying substances as residue.
摘要翻译：描述了从含有它们的混合物和苯酚和较高沸点的伴随物质中分离焦儿茶酚和氢醌的方法。该混合物可以是通过使苯酚与过氧化羟基化剂反应并除去一些苯酚和沸点低于苯酚的物质而获得的。将混合物进行第一次精馏，其中在塔顶馏出苯酚和酚与邻苯二酚之间的沸点的物质，留下含有邻苯二酚和氢醌的底部产物。对底部产物进行第二次精馏，其中邻苯二酚在塔顶馏出物后面留下含有氢醌和较高沸点伴随物质的底部产物。将该底部产物进料到浓缩单元中，其中氢醌在塔顶蒸发，留下高沸点伴随物质作为残留物。

2. 发明授权

US4381973A Process for the preparation of pyrocatechol and hydroquinone 失效
标题翻译：制备邻苯二酚和氢醌的方法
公开(公告)号：US4381973A
公开(公告)日：1983-05-03
申请号：US292855
申请日：1981-08-14
申请人： Christoph Jupe , Helmut Waldmann , Jurgen Baumert , Gunther Schummer
发明人： Christoph Jupe , Helmut Waldmann , Jurgen Baumert , Gunther Schummer
IPC分类号： C07C27/00 , C07C37/60 , C07C37/74 , C07C39/08 , C07C67/00 , B01D3/10
CPC分类号： C07C37/74 , C07C37/60
摘要： A process for the preparation of pyrocatechol and hydroquinone by reaction of phenol with a peroxidic hydroxylating reagent followed by working-up of the resultant reaction mixture is disclosed. The work-up procedure is carried out in a first rectification column operated under specified conditions and having specified separation stages in a rectification section and a stripping section whereby there is distilled overhead components which boil at a temperature lower than phenol. Taken off from the bottom is a mixture comprising phenol and materials of higher boiling point which are fed into a second rectification column which is also operated under very specified conditions whereby pure phenol is recovered overhead leaving a bottoms comprising phenol pyrocatechol and hydroquinone which are then processed to separate phenol from a mixture of pyrocatechol and hydroquinone.
摘要翻译：公开了通过苯酚与过氧化羟基化试剂的反应制备邻苯二酚和氢醌的方法，然后处理所得的反应混合物。处理程序在规定条件下操作的第一精馏塔中进行，并且在精馏段和汽提段中具有特定的分离阶段，由此蒸馏塔顶组分在低于苯酚的温度下沸腾。从底部排出的是包含苯酚和高沸点物质的混合物，该混合物进料到第二精馏塔中，该第二精馏塔也在非常规定的条件下操作，从而从顶部回收纯苯酚，留下包含苯酚邻苯二酚和氢醌的塔底物，然后将其加工以将苯酚与邻苯二酚和氢醌的混合物分离。

3. 发明授权

US4362604A Process for the preparation of pyrocatechol and hydroquinone 失效
标题翻译：制备邻苯二酚和氢醌的方法
公开(公告)号：US4362604A
公开(公告)日：1982-12-07
申请号：US292854
申请日：1981-08-14
申请人： Christoph Jupe , Helmut Waldmann , Jurgen Baumert , Gunther Schummer
发明人： Christoph Jupe , Helmut Waldmann , Jurgen Baumert , Gunther Schummer
IPC分类号： C07C27/00 , C07C37/60 , C07C37/74 , C07C39/08 , C07C67/00 , B01D3/14
CPC分类号： C07C37/74 , C07C37/60
摘要： A process for the isolation of hydroquinone, pyrocatechol, phenol and carboxylic acid from the reaction mixture containing the same such as one obtained by reaction of phenol with percarboxylic acid is disclosed. The reaction mixture is fed to a first rectification column and subjected to distillation whereby there is obtained a bottoms product containing pyrocatechol, hydroquinone and phenol. The top product is largely condensed and recycled, there being withdrawn from the top of the rectification column a mixture comprising phenol and carboxylic acid. The phenol and carboxylic acid mixture are continuously fed to a second rectification column where carboxylic acid is separated from phenol and substantially pure phenol is withdrawn from the stripping section and/or bottom of the second rectification column.
摘要翻译：公开了从含有酚类的反应混合物中分离氢醌，邻苯二酚，苯酚和羧酸的方法，例如通过苯酚与过羧酸的反应而得到的方法。将反应混合物加入到第一精馏塔中并进行蒸馏，由此得到含有邻苯二酚，氢醌和苯酚的底部产物。顶部产物大部分是冷凝和再循环的，从精馏塔的顶部排出含酚和羧酸的混合物。将苯酚和羧酸混合物连续进料至第二精馏塔，其中羧酸与苯酚分离，基本上纯的苯酚从第二精馏塔的汽提段和/或底部排出。

4. 发明授权

US4324925A Process for the preparation of polyhydric phenols 失效
标题翻译：多元酚的制备方法
公开(公告)号：US4324925A
公开(公告)日：1982-04-13
申请号：US164444
申请日：1980-06-30
申请人： Christoph Jupe , Helmut Waldmann , Hermann Seifert
发明人： Christoph Jupe , Helmut Waldmann , Hermann Seifert
IPC分类号： C07C27/00 , C07C37/60 , C07C37/82 , C07C39/08 , C07C51/00 , C07C59/52 , C07C65/01 , C07C67/00 , C07C201/00 , C07C205/23 , C07C213/00 , C07C215/74 , C07C253/00 , C07C255/53 , C07C39/12 , C07C79/24 , C07C91/30 , C07C149/36
CPC分类号： C07C37/60 , C07C37/82
摘要： An improved process for the preparation of a polyhydric phenol by hydroxylation of a phenol with a peroxidic hydroxylating agent, is disclosed. The improvement resides in that before the hydroxylation, all or some of the mixture to be hydroxylated is treated with a cation exchanger.
摘要翻译：公开了通过用过氧羟基化剂羟基化苯酚制备多元酚的改进方法。改进之处在于在羟基化之前，用阳离子交换剂处理待羟基化的所有或一些混合物。

5. 发明授权

US4387252A Process for the preparation of polyhydric phenols 失效
标题翻译：多元酚的制备方法
公开(公告)号：US4387252A
公开(公告)日：1983-06-07
申请号：US193572
申请日：1980-10-03
申请人： Christoph Jupe , Helmut Waldmann , Hermann Seifert
发明人： Christoph Jupe , Helmut Waldmann , Hermann Seifert
IPC分类号： B01J27/00 , B01J31/00 , C07B61/00 , C07C27/00 , C07C37/60 , C07C39/08 , C07C67/00 , C07C39/10
CPC分类号： C07C37/60
摘要： The invention relates to an improved process for the preparation of polyhydric phenols by hydroxylation of phenols with peroxidic hydroxylating agents and in the presence of 0.00005 to 0.03% by weight (relative to the phenols employed) of substances which can form chelate complexes with metal ions, such as nitrogen-containing di- or poly- carboxylic acids or phosphoric acid derivatives. The products of the process are known to be useful in the fields of photography, dyestuffs, plastics, fragrances and flavors.
摘要翻译：本发明涉及通过用过氧化羟基化剂羟基化酚和在可与金属离子形成螯合物的物质0.00005至0.03重量％（相对于所用酚）存在下制备多元酚的改进方法，例如含氮二羧酸或多羧酸或磷酸衍生物。已知该方法的产品可用于摄影，染料，塑料，香料和香料领域。

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