3.
    发明专利
    未知

    公开(公告)号:DE1668023A1

    公开(公告)日:1971-11-18

    申请号:DE1668023

    申请日:1967-09-19

    Applicant: HOECHST AG

    Abstract: 1,188,745. Purification of monochloroacetic acid. FARBWERKE HOECHST AG. 19 Sept., 1968 [19 Sept., 1967], No. 44609/68. Heading C2C. Monochloroacetic acid is purified by passing the crude acid in the liquid state at 110‹ to 145‹ C. and hydrogen over a stationary catalyst consisting of at least one noble metal of Group VIII of the Periodic Table supported on an acidresistant carrier. Specified catalysts are palladium-group metals and their alloys and specified carriers are alumina, carbon, silicic acid, silicon carbide and boron carbide.

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