SUPPORTED CATALYSTS WITH CONTROLLED METAL CLUSTER SIZE
    5.
    发明申请
    SUPPORTED CATALYSTS WITH CONTROLLED METAL CLUSTER SIZE 有权
    受控的金属聚集体尺寸的支持催化剂

    公开(公告)号:US20080051282A1

    公开(公告)日:2008-02-28

    申请号:US11466900

    申请日:2006-08-24

    IPC分类号: B01J31/00

    摘要: There is disclosed a process for producing a catalyst. The process includes the steps of: a) combining a dendrimer polymer and metal salt in solution forming a metal ion complex; b) exposing the metal ion complex to a reducing environment forming a dendrimer metal nanocomposite; c) depositing the dendrimer metal nanocomposite onto a catalyst support material; d) removing a solvent from the dendrimer metal nanocomposite forming metal clusters; and e) removing the dendrimer polymer forming a catalyst. Additionally, there is disclosed a catalyst having a catalytic metal deposited on a substrate. The catalytic metal is formed in clusters having a size of from 2 to 150 atoms. In another aspect, the clusters may have a spacing of from 2 to 100 nanometers between adjacent metal clusters. Further, in another aspect, the metal clusters which comprise the catalyst have a size distribution in which 70% of the clusters are within 0.6 nm of the average diameter and 99% of the particles are within 1.5 nm of the average diameter.

    摘要翻译: 公开了一种催化剂的制造方法。 该方法包括以下步骤:a)将形成金属离子络合物的溶液中的树枝状聚合物和金属盐组合; b)将金属离子络合物暴露于形成树枝状大分子金属纳米复合材料的还原环境中; c)将树枝状大分子金属纳米复合材料沉积到催化剂载体材料上; d)从形成金属簇的树枝状金属纳米复合材料中除去溶剂; 和e)除去形成催化剂的树状聚合物聚合物。 另外,公开了一种具有沉积在基底上的催化金属的催化剂。 催化金属形成为具有2至150个原子的尺寸的簇。 在另一方面,簇可以在相邻金属簇之间具有2至100纳米的间隔。 此外,在另一方面,包含催化剂的金属簇具有尺寸分布,其中70%的簇在平均直径的0.6nm以内,99%的颗粒在平均直径的1.5nm以内。

    Condensed phase preparation of 2,3-pentanedione
    9.
    发明授权
    Condensed phase preparation of 2,3-pentanedione 失效
    缩合相制备2,3-戊二酮

    公开(公告)号:US5831130A

    公开(公告)日:1998-11-03

    申请号:US847558

    申请日:1997-04-24

    IPC分类号: C07C45/00

    CPC分类号: C07C45/00

    摘要: A condensed phase process for the preparation of purified 2,3-pentanedione from lactic acid and an alkali metal lactate is described. The process uses elevated temperatures between about 200.degree. to 360.degree. C. for heating a reaction mixture of lactic acid and an alkali metal lactate to produce the 2,3-pentanedione in a reaction vessel. The 2,3-pentanedione produced is vaporized from the reaction vessel and condensed with water.

    摘要翻译: 描述了从乳酸和碱金属乳酸盐制备纯化的2,3-戊二酮的凝聚相方法。 该方法使用约200至360℃之间的升高的温度来加热乳酸和碱金属乳酸的反应混合物,以在反应容器中产生2,3-戊二酮。 产生的2,3-戊二酮从反应容器中蒸发并与水一起冷凝。