4.
    发明专利
    未知

    公开(公告)号:DE102007049742A1

    公开(公告)日:2009-04-23

    申请号:DE102007049742

    申请日:2007-10-16

    Abstract: Process for preparing an aqueous dispersion which has a pH of 9 to 14 and comprises particles of a pyrogenic titanium-silicon mixed oxide powder having a proportion of silicon dioxide of 75 to 99.99% by weight and of titanium dioxide of 0.01 to 25% by weight, whose mean aggregate diameter in the dispersion is not more than 200 nm, and at least one basic, quaternary ammonium compound.

    5.
    发明专利
    未知

    公开(公告)号:DE10333588A1

    公开(公告)日:2005-02-17

    申请号:DE10333588

    申请日:2003-07-24

    Applicant: DEGUSSA

    Abstract: The present invention focuses on a process for the hydrogenation of aromatic or heteroaromatic compounds and in particular on the ring hydrogenation of compounds having the formula (I). Aromatic amino acids and amino alcohols can be successfully ring-hydrogenated using a platinum-rhodium mixed catalyst. The products can be used inter alia as mimetics in bioactive peptide active ingredients.

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