Solubilization of boric acid
    76.
    发明公开
    Solubilization of boric acid 失效
    Löslichmachen vonBorsäure

    公开(公告)号:EP0866043A1

    公开(公告)日:1998-09-23

    申请号:EP97104884.8

    申请日:1997-03-21

    摘要: The present invention is directed to methods for solubilizing boric acid to produce liquid, boron-containing solutions. In these methods, boric acid is added to a previously formed solution of a metal ion and ligand. The ligand must be capable of both complexing the metal ion and simultaneously coordinating or hydrogen bonding with the boric acid. Preferred metal ions are the transition metals. Preferred ligands are the alkanolamines, polyamines, dialkylaminoalkylamines and alkyldiaminecarboxylic acids and salts thereof. Using the methods of the present invention, stable, clear solutions, preferrably aqueous solutions, containing about 9-11 percent-by-weight or more boron are readily prepared.

    摘要翻译: 本发明涉及溶解硼酸以制备液体含硼溶液的方法。 在这些方法中,将硼酸加入到先前形成的金属离子和配体的溶液中。 配体必须能够使金属离子络合并同时与硼酸配位或氢键合。 优选的金属离子是过渡金属。 优选的配体是链烷醇胺,多胺,二烷基氨基烷基胺和烷基二氨基羧酸及其盐。 使用本发明的方法,容易制备含有约9-11%重量或更多硼的稳定的,澄清的溶液,优选的水溶液。

    Nickel catalyst for the cyanation of aromatic halides
    80.
    发明公开
    Nickel catalyst for the cyanation of aromatic halides 失效
    Nickel Katalysatorfürdie Cyanierung von aromatischen Halogenverbindungen。

    公开(公告)号:EP0613720A1

    公开(公告)日:1994-09-07

    申请号:EP94200474.8

    申请日:1994-02-24

    摘要: The invention relates to a nickel compound which can be used as a catalyst, said nickel compound having a central nickel atom complexed by a diphosphine ligand. In said diphosphine ligand the P-atoms are interconnected through a metallocene biradical or an aromatic bivalent radical.
    The invention also relates to the use of said nickel compound and to a method of preparing an aromatic cyanide from an aromatic halide and an alkali metal cyanide in a substantially anhydrous non-dipolar aprotic solvent under the influence of said phosphine-nickel catalyst, in the presence of a reducing agent.

    摘要翻译: 本发明涉及可用作催化剂的镍化合物,所述镍化合物具有由二膦配体络合的中心镍原子。 在所述二膦配体中,P-原子通过茂金属双键或芳族二价基团相互连接。 本发明还涉及所述镍化合物的用途以及在所述膦 - 镍催化剂的影响下,在基本无水的非偶极非质子溶剂中由芳族卤化物和碱金属氰化物制备芳族氰化物的方法, 存在还原剂。