4.
    发明专利
    未知

    公开(公告)号:DE3680905D1

    公开(公告)日:1991-09-19

    申请号:DE3680905

    申请日:1986-10-18

    Applicant: BASF AG

    Abstract: Prodn. of Cr2O3 is effected by thermal decompsn. of hydrous NH4 bichromate (I) at 450-750 deg.C in a restricted combustion chamber such that the ratio of the vol. of the combustion chamber in l, to the flow rate of (I) in kg/min. is 1-6:1. Pref. decompsn. is effected in a combustion chamber attached to the feed inlet of a rotary furnace, the material emerging from the combustion chamber being post-reacted in the furnace at sub-decompsn. temp. before being discharged from the other end. The combustion chamber has a dia./length ratio of 1:2 2:1. The ratio of the dia. of the combustion chamber to the dia. of the furnace is 1-3:4.

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