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1. 发明授权

US5763637A Process for preparing dimethyl vinylphosphonate from dimethyl 2-acetoxyethanephosphonate 失效
标题翻译：由2-乙酰氧基乙烷膦酸二甲酯制备二甲基乙烯基膦酸酯的方法
公开(公告)号：US5763637A
公开(公告)日：1998-06-09
申请号：US587645
申请日：1996-01-17
申请人： Knut Riedel , Udo Dettmeier , Guenter Roscher
发明人： Knut Riedel , Udo Dettmeier , Guenter Roscher
IPC分类号： C07F9/40
CPC分类号： C07F9/4015
摘要： The invention relates to a process for preparing dimethyl vinylphosphonate by thermal dissociation of dimethyl 2-acetoxyethanephosphonate in the gas phase, which comprises vaporizing dimethyl 2-acetoxyethanephosphonate and dissociating it without catalysis at a temperature of from 400.degree. to 700.degree. C. into dimethyl vinylphosphonate and acetic acid.
摘要翻译：本发明涉及一种通过在气相中热解2-乙酰氧基乙基膦酸二甲酯来制备二甲基乙烯基膦酸酯的方法，该方法包括将2-乙酰氧基乙烷膦酸二甲酯蒸发，并在400-700℃的温度下将其解离成二甲基乙烯基膦酸酯和乙酸。

2. 发明授权

US4160113A Process for the manufacture of resorcinol 失效
标题翻译：生物降解药物的制备方法
公开(公告)号：US4160113A
公开(公告)日：1979-07-03
申请号：US850815
申请日：1977-11-11
申请人： Werner H. Muller , Knut Riedel , Hans Krekeler
发明人： Werner H. Muller , Knut Riedel , Hans Krekeler
IPC分类号： C07C37/07 , C07C39/08
CPC分类号： C07C37/07
摘要： The present invention is related to a process for the manufacture of resorcinols by catalytic dehydrogenation of cyclohexane diones-(1,3) in the liquid phase by means of a dehydrogenating mixture consisting of a solvent and of a catalyst containing a noble metal from Group VIII of the Periodic Table.

3. 发明授权

US4918225A Process for the preparation of pure crotonic acids 失效
标题翻译：制备纯巴豆酸的方法
公开(公告)号：US4918225A
公开(公告)日：1990-04-17
申请号：US783319
申请日：1985-10-02
申请人： Siegbert Rittner , Herbert Gortz , Knut Riedel
发明人： Siegbert Rittner , Herbert Gortz , Knut Riedel
IPC分类号： C07C57/08 , C07C51/00 , C07C51/43 , C07C51/487 , C07C67/00
CPC分类号： C07C51/43 , C07C51/487
摘要： The invention relates to a process for the preparation of pure cis- or trans-crotonic acid from a mixture of the two isomers by melt crystallization. To prepare trans-crotonic acid, an isomer mixture I containing at least 40% by weight of trans-crotonic acid is used as the starting material. On the other hand, if cis-crotonic acid is to be prepared, an isomer mixture II containing at least 80% by weight of cis-crotonic acid is used as the starting material. The particular isomer mixture is melted and then left to cool, trans-crotonic acid being allowed to crystrallize out of mixture I to a residual content of at least 35% by weight, and cis-crotonic acid being allowed to crystallize out of mixture II to a residual content of at least 75% by weight.
摘要翻译：本发明涉及通过熔融结晶从两种异构体的混合物制备纯的顺式或反式巴豆酸的方法。为了制备反式巴豆酸，使用含有至少40重量％反式巴豆酸的异构体混合物I作为起始原料。另一方面，如果要制备顺式丁烯酸，则使用含有至少80重量％的顺式巴豆酸的异构体混合物II作为起始原料。将特定的异构体混合物熔化，然后冷却，使反式巴豆酸从混合物I中冷冻至至少35重量％的残余含量，并使顺式巴豆酸从混合物II中结晶出至残留含量至少为75重量％。

4. 发明授权

US4720577A Process for the extraction of carboxylic acids from dilute aqueous solutions 失效
标题翻译：从稀水溶液中萃取羧酸的方法
公开(公告)号：US4720577A
公开(公告)日：1988-01-19
申请号：US783212
申请日：1985-10-02
申请人： Bernhard Wojtech , Walter Steppich , Dieter Freudenberger , Knut Riedel
发明人： Bernhard Wojtech , Walter Steppich , Dieter Freudenberger , Knut Riedel
IPC分类号： C07C53/00 , C07C51/00 , C07C51/48 , C07C55/02 , C07C59/01 , C07C67/00 , C07C51/42
CPC分类号： C07C51/48
摘要： The invention relates to a process for the extraction of carboxylic acids from aqueous solutions with a carboxylic acid content below 8% by weight. A mixture of an aliphatic amine with a total carbon number of at least 10 and a phenol or naphthol is used as extracting agent. The molar ratio of phenol:amine or alkylated phenol:amine or naphthol:amine is in the range from 0.1:1 to around 1.1:1.
摘要翻译：本发明涉及一种羧酸含量低于8重量％的水溶液萃取羧酸的方法。使用总碳数至少为10的脂族胺和苯酚或萘酚的混合物作为提取剂。苯酚：胺或烷基化酚：胺或萘酚：胺的摩尔比在0.1:1至1.1:1的范围内。

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