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20 条记录 (耗时 0.016 秒)

    Process for the preparation of a halosubstituted aromatic acid
    1.
    发明授权
    Process for the preparation of a halosubstituted aromatic acid 失效
    制备卤代芳族酸的方法

    公开(公告)号：US5763650A

    公开(公告)日：1998-06-09

    申请号：US645448

    申请日：1996-05-13

    申请人： Marina Mauro ,  Carlo Felice Viscardi ,  Massimo Gagna

    发明人： Marina Mauro ,  Carlo Felice Viscardi ,  Massimo Gagna

    IPC分类号： B01J27/02 ,  B01J27/10 ,  C07B61/00 ,  C07C227/04 ,  C07C227/06 ,  C07C227/16 ,  C07C229/62 ,  C07C229/00

    CPC分类号： C07C227/04 ,  C07C227/16

    摘要： The present invention refers to a process for the preparation of 5-amino-2,4,6-triiodo-1,3-benzenedicarboxylic acid, comprising the following steps: a) catalytic hydrogenation of 5-nitro-1,3-benzenedicarboxylic acid in neutral or basic environment, which gives an aqueous solution of 5-amino-1,3-benzenedicarboxylic acid sodium salt; b) direct iodination of the 5-amino-1,3-benzenedicarboxylic acid sodium salt solution deriving from step a), without further purification, with a solution of ICl in HCl, being the 5-amino-1,3-benzenedicarboxylic acid sodium salt solution previously added with HCl and H.sub.2 SO.sub.4.

    摘要翻译： 本发明涉及一种制备5-氨基-2,4,6-三碘-1,3-苯二甲酸的方法，包括以下步骤：a）5-硝基-1,3-苯二甲酸的催化氢化 在中性或碱性环境中，得到5-氨基-1,3-苯二甲酸钠盐的水溶液; b）不经进一步纯化，用ICl在HCl中的溶液直接碘化来自步骤a）的5-氨基-1,3-苯二甲酸钠盐溶液，为5-氨基-1,3-苯二甲酸钠 盐溶液先前加入HCl和H2SO4。

    Method for the deionization of substances that are not stable at acidic pH
    6.
    发明授权
    Method for the deionization of substances that are not stable at acidic pH 失效
    在酸性pH下不稳定的物质去离子的方法

    公开(公告)号：US06066259A

    公开(公告)日：2000-05-23

    申请号：US94510

    申请日：1998-06-10

    申请人： Carlo Felice Viscardi ,  Marina Ausonio ,  Giuseppe Dionisio

    发明人： Carlo Felice Viscardi ,  Marina Ausonio ,  Giuseppe Dionisio

    IPC分类号： B01J47/02 ,  B01D15/04 ,  B01J39/04 ,  B01J41/04 ,  C02F1/42

    CPC分类号： B01J39/046

    摘要： A process based on ion exchange with separated beds is disclosed for the deionization of substances that are not stable in the presence of strongly acidic cation exchangers, wherein the solution to be deionized is contacted with a first bed consisting of a basic anion exchanger in the form of hydrogen carbonate and subsequently with a second bed, connected in series, consisting of a weakly acidic cation exchanger in hydrogen form.

    摘要翻译： 公开了一种基于与分离床的离子交换的方法，用于在强酸性阳离子交换剂存在下不稳定的物质的去离子，其中待去离子的溶液与由碱性阴离子交换剂组成的第一床 的碳酸氢盐，随后与第二床串联连接，由氢形式的弱酸性阳离子交换剂组成。

    Process for the preparation of macrocyclic chelants and the chelates thereof with paramagnetic metal ions
    7.
    发明授权
    Process for the preparation of macrocyclic chelants and the chelates thereof with paramagnetic metal ions 有权
    制备大环螯合剂及其螯合物与顺磁金属离子的方法

    公开(公告)号：US6042810A

    公开(公告)日：2000-03-28

    申请号：US317271

    申请日：1999-05-24

    申请人： Giorgio Ripa ,  Alessandro Scala ,  Marcella Murru ,  Carlo Felice Viscardi ,  Marina Ausonio ,  Chiara Scotti ,  Patrizia Cossutta

    发明人： Giorgio Ripa ,  Alessandro Scala ,  Marcella Murru ,  Carlo Felice Viscardi ,  Marina Ausonio ,  Chiara Scotti ,  Patrizia Cossutta

    IPC分类号： C07D257/02 ,  A61B5/055 ,  C07D487/22

    CPC分类号： C07D257/02

    摘要： A process for the preparation of complexes of macrocyclic chelants with paramagnetic metal trivalent ions of formula (XII) ##STR1## wherein R.sub.1, R.sub.2 and Me.sup.3+ are as described in the following, comprising: a) reaction of 1,4,7,10-tetraazacyclododecane with triethyl orthoformate to give 5H,9bH-2a,4a,7,9a-octahydrotetraazacycloocta[cd]pentalene; b) carboxymethylation reaction in water; c) hydrolysis reaction in basic conditions; d) alkylation according to known methods with an epoxide in water; e) complexation according to known methods carried out in water by addition of a paramagnetic metal salt; f) purification by diafiltration, final desalting of the aqueous solution on ion exchange resins and g) crystallization or recovery.

    摘要翻译： 制备大环螯合物与式（Ⅻ）的顺磁金属三价离子的络合物的方法，其中R 1，R 2和Me 3 +如下所述，其包括：a）将1,4,7,10-四氮杂环十二烷与三乙基 得到5H，9bH-2a，4a，7,9a-八氢四氮杂环辛酸[cd] b）在水中的羧甲基化反应; c）碱性条件下的水解反应; d）根据已知方法用环氧化物在水中烷基化; e）根据已知方法，通过加入顺磁金属盐在水中进行络合; f）通过渗滤净化，水溶液对离子交换树脂的最终脱盐，以及g）结晶或回收。