16.
    发明专利
    未知

    公开(公告)号:DE19706525A1

    公开(公告)日:1998-08-20

    申请号:DE19706525

    申请日:1997-02-19

    Applicant: BASF AG

    Abstract: A process for producing phosphorus-containing iron powder involves heating a mixture of finely divided carbonyl iron and elemental phosphorus and pulverising the product. Preferably, a mixture of 70-99 wt.% finely divided carbonyl iron powder and 1-30 wt.% red phosphorus is heated at above 300 degrees C in an inert gas atmosphere. Also claimed is a phosphorus-containing iron powder of less than 10 mu mean particle diameter, containing 0.1-80 wt.% P, less than 1 wt.% C, less than 1 wt.% N, less than 0.5 wt.% H and less than 0.1 wt.% total of other impurity elements except oxygen.

    19.
    发明专利
    未知

    公开(公告)号:DE3861839D1

    公开(公告)日:1991-04-04

    申请号:DE3861839

    申请日:1988-08-26

    Applicant: BASF AG

    Abstract: To produce alkali metal nitrates, alkali metal chloride solution is fed to the anode space (2) of an electrolysis cell (3), the anode space (2) being separated from the cathode space (5) by a permselective cation exchanger membrane (6). Simultaneously fed to the cathode space (5) is a nitric acid/alkali metal nitrate solution whose alkali metal nitrate concentration is not less than 10% by weight and whose HNO3 concentration is between 0.1 and 10% by weight. A solution whose pH does not exceed 5 is removed from the cathode space (5). … …

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