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    4.
    发明专利
    未知

    公开(公告)号：DE19605213A1

    公开(公告)日：1997-08-14

    申请号：DE19605213

    申请日：1996-02-13

    Applicant: BASF AG

    Inventor： KNUTH BERNHARD DR ,  DIERCKS RAINER DR

    IPC: B01J23/50 ,  B01J27/18 ,  B01J37/34 ,  C07C45/38 ,  C07C47/04 ,  C07C47/052

    Abstract: Process for the preparation of formaldehyde through oxidative dehydrogenation of methanol characterized in that a gas mixture containing: a) 0.1 to 50 vol. % methanol, b) 0.1 to 30 vol. % oxygen, c) 0.1 to 50 vol. % nitrogen oxide and d) 0 to 60 vol. % water; is led to a phosphor-doped silver catalyst fixed bed (a) at a temperature of 150 to 800 DEG C and where is deposited on the phosphor-doped silver catalyst fixed bed (a) 0.01 to 100 wt.ppm phosphor, in relation to the phosphor-doped silver catalyst fixed bed, in the form of a finely distributed phosphor compound with a melting or decomposition temperature of more than 500 DEG C (phosphor compound P) per kg methanol led through the phosphor-doped silver catalyst fixed bed (a) in the form of the gas mixture (i), per cm of the cross-sectional area of the bed (a).

    5.
    发明专利
    未知

    公开(公告)号：DE19605212A1

    公开(公告)日：1997-08-14

    申请号：DE19605212

    申请日：1996-02-13

    Applicant: BASF AG

    Inventor： DIERCKS RAINER DR ,  KNUTH BERNHARD DR ,  AICHER ALBRECHT

    IPC: B01J27/18 ,  B01J37/34 ,  C07C45/38 ,  C07C47/052 ,  C07C47/04

    Abstract: Proposed is a packed silver-catalyst bed doped with phosphorus, the bed being produced as follows: I) silver crystals obtained by the electrolytic precipitation of silver from an aqueous silver-salt solution are placed to form an outlet packed bed of silver catalyst, II) said bed is activated by passing a gaseous mixture containing methanol and oxygen (gas mixture M) through the bed at a temperature of 150 to 800 DEG C and III) the activated bed is doped with 1 to 20,000 ppm by weight (relative to the silver) of phosphorus by contacting it with a finely divided phosphorus compound (phosphorus compound B) having a melting or decomposition point higher than 500 DEG C.

    6.
    发明专利
    未知

    公开(公告)号：DE19605211A1

    公开(公告)日：1997-08-14

    申请号：DE19605211

    申请日：1996-02-13

    Applicant: BASF AG

    Inventor： DIERCKS RAINER DR ,  KNUTH BERNHARD DR

    IPC: B01J27/18 ,  B01J37/34 ,  C07C45/38 ,  C07C47/04 ,  C07C47/052

    Abstract: Process for the preparation of formaldehyde through oxidative dehydration of methanol characterized in that a gas mixture containing: a) 0.1 to 50 vol.% methanol; b) 0.1 to 30 vol.% oxygen; c) 0.1 to 50 vol.% dinitrogen monoxide and d) 0 to 60 vol.% water is led through a phosphor-doped silver catalyst packed bed at a temperature of 150 to 800 DEG C.

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