利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.009 秒)

    Process for synthesising aluminas in a basic medium
    1.
    发明授权
    Process for synthesising aluminas in a basic medium 有权
    在碱性介质中合成氧化铝的方法

    公开(公告)号：US06214312B1

    公开(公告)日：2001-04-10

    申请号：US09357824

    申请日：1999-07-21

    申请人： Frédéric Kolenda ,  Jean-Louis Guth ,  Sabine Valange ,  Zélimir Gabelica ,  Sylvie Lacombe

    发明人： Frédéric Kolenda ,  Jean-Louis Guth ,  Sabine Valange ,  Zélimir Gabelica ,  Sylvie Lacombe

    IPC分类号： C01F702

    CPC分类号： C01B37/00 ,  C01F7/02 ,  C01F7/34 ,  C01P2002/72 ,  C01P2002/86 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16

    摘要： The invention concerns a process for synthesising aluminas with a controlled porosity in which the pore diameter is in the range 0.6 nm to 80 nm. This process is carried out in a plurality of steps including at least one step a) in which an alumina precursor is prepared by hydrolysis of at least one anionic inorganic source of aluminium in the presence of at least one surfactant. Step a) of the process is carried out in an essentially aqueous medium the pH of which is generally higher than the isoelectric point of the alumina. The process of the invention also comprises at least one step b) in which the precipitate obtained is dried in air at a temperature of about 40° C. to 110° C. for a period of about 2 to 30 hours, and at least one step c) in which the dried precipitate is calcined at a temperature which is sufficient to eliminate the molecules of surfactant present in the precursor.

    摘要翻译： 本发明涉及合成具有可控孔隙率的氧化铝的方法，其中孔径在0.6nm至80nm的范围内。 该方法包括至少一个步骤a）的多个步骤，其中通过在至少一种表面活性剂的存在下水解至少一种阴离子无机铝源来制备氧化铝前体。 步骤a）该方法在基本上水性介质中进行，其pH值通常高于氧化铝的等电点。 本发明的方法还包括至少一个步骤b），其中所获得的沉淀物在空气中在约40℃至110℃的温度下干燥约2至30小时，并且至少一个 步骤c），其中干燥的沉淀物在足以消除前体中存在的表面活性剂分子的温度下煅烧。

    Hydrated aluminum compounds, their preparation and use thereof
    3.
    发明授权
    Hydrated aluminum compounds, their preparation and use thereof 失效
    水合铝化合物，其制备和用途

    公开(公告)号：US06197276B1

    公开(公告)日：2001-03-06

    申请号：US09249077

    申请日：1999-02-12

    申请人： Frédéric Kolenda ,  Jean-Louis Guth ,  Sabine Valange ,  Zelimir Gabelica ,  Eric Benazzi

    发明人： Frédéric Kolenda ,  Jean-Louis Guth ,  Sabine Valange ,  Zelimir Gabelica ,  Eric Benazzi

    IPC分类号： C01F702

    CPC分类号： C01F7/34 ,  C01B37/00 ,  C01P2002/72 ,  C01P2002/78 ,  C01P2002/86

    摘要： Hydrated aluminium compounds of the present invention are represented by the general formula nS, mM, Al2O3, xH2O where S is a surfactant or a group of surfactants, n is the number of moles of S, M is an alkaline cation, preferably selected from the group formed by Na+, K+, NH4+, m is the number of moles of M and x is the number of moles of water. The hydrated compounds are obtained from inorganic aluminium sources which are in the form of cation-monomers and/or cation-oligomers. The surfactants are anionic and/or non-ionic surfactants. When the group of surfactants comprises at least one anionic surfactant, at least one cationic surfactant can optionally be added.

    摘要翻译： 本发明的水合铝化合物由通式nS，mM，Al 2 O 3，xH 2 O表示，其中S是表面活性剂或一组表面活性剂，n是S的摩尔数，M是碱性阳离子，优选选自 由Na +，K +，NH 4 +，m形成的基团是M的摩尔数，x是水的摩尔数。 水合化合物由阳离子单体和/或阳离子低聚物形式的无机铝源获得。 表面活性剂是阴离子和/或非离子表面活性剂。 当该组表面活性剂包含至少一种阴离子表面活性剂时，可以任选地加入至少一种阳离子表面活性剂。