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    PRODUCTION OF SOLID BY PRECIPITATION
    1.
    发明专利
    PRODUCTION OF SOLID BY PRECIPITATION 失效

    公开(公告)号：JPH11128732A

    公开(公告)日：1999-05-18

    申请号：JP24057698

    申请日：1998-08-26

    Applicant: BASF AG

    Inventor： HORN HANS CHRISTOPH DR ,  KUMBERGER OTTO DR ,  MILIES MARCO DR ,  NETH NORBERT DR ,  WOLFGANG JUERGEN ,  RIEKER CHRISTOPHER WILLIAM DR ,  SPRAGUE MICHAEL JOLYON DR ,  STROEZEL MANFRED

    IPC: B01J19/18 ,  B01F5/00 ,  B01F5/06 ,  B01F7/00 ,  B01F7/22 ,  B01F15/02 ,  B01F15/06 ,  B01J14/00 ,  B01J19/00 ,  C01G1/00

    Abstract: PROBLEM TO BE SOLVED: To produce a high quality solid by precipitation by supplying a plurality of starting materials to a mixing chamber of a mixing apparatus comprising stirring blades through inlets formed in the circumferential wall of the chamber and discharging the resultant mixture containing the solid produced by mixing out of an outlet formed in the circumferential wall of the mixing chamber. SOLUTION: In the case of production of a solid such as carbonates, hydroxycarbonates, hydroxides to be used as precursors of catalysts or the simple substances, a plurality of starting substances are supplied to a mixing apparatus 3 through conduits 1, 2 especially in a manner that the resultant slurry comes to the center of impellers and at the same time sodium carbonate and a metal salt solution are added form side faces. Then, precipitation reaction is caused in the mixing apparatus 3 and the obtained mixture is supplied to a degassing tank 5 provided with a stirring apparatus 6 through a conduit 4. A partial flow of the product is turned back to the mixing apparatus 3 through a conduit 7 by a pump 8 and at that time, the temperature of the mixing apparatus 3 is adjusted to be at the demanded temperature by a heat exchanger 9.

    CATALYST FOR STEAM REFORMING OF METHANOL
    2.
    发明专利
    CATALYST FOR STEAM REFORMING OF METHANOL 失效

    公开(公告)号：JPH11169714A

    公开(公告)日：1999-06-29

    申请号：JP25730298

    申请日：1998-09-10

    Applicant: BASF AG

    Inventor： KUMBERGER OTTO DR ,  SPRAGUE MICHAEL JOLYON DR ,  HOFSTADT OTTO

    IPC: C01B3/40 ,  B01J23/80 ,  C01B3/32

    Abstract: PROBLEM TO BE SOLVED: To enhance catalyst activity to catalyst volume by using a catalyst produced by precipitating and settling a solution of a particular zinc salt and an aluminum salt, separating precipitates by filtering, washing the precipitates, removing alkali metal ions and then drying and baking the precipitates to obtain mixed oxides. SOLUTION: A solution of a zinc salt and an aluminum salt having atomic ratio of Zn to Al of 3:1 to 1:3 is allowed to precipitate and settle at a pH value of 5-12 at a temperature of 20-100 deg.C by an alkali metal carbonate solution. Precipitates are separated by filtering and alkali metal ions are removed the precipitates are baked at 250-800 deg.C to obtain mixed oxides as a catalyst. The mixed oxides are dispersed in an acid solution of a copper salt and a zinc salt wherein atomic ratio of Cu to Zn is 1:5 to 20:1 and a dispersion solution is allowed to precipitate and settle at a pH value of 6-9 at a temperature of 20-100 deg.C so as to make methanol undergo steam reforming.

    7.
    发明专利
    未知

    公开(公告)号：DE59802308D1

    公开(公告)日：2002-01-17

    申请号：DE59802308

    申请日：1998-09-09

    Applicant: BASF AG

    Inventor： KUMBERGER OTTO DR ,  SPRAGUE MICHAEL JOLYON DR ,  HOFSTADT OTTO

    IPC: C01B3/40 ,  B01J23/80 ,  C01B3/32

    Abstract: The catalyst is in tablet form having a diameter of 0.8-5 mm and a height of 0.8-5 mm. The catalyst is prepared by: (a) precipitating a solution of zinc and aluminium salts (Zn:Al ratio is 3-1:1-3) with and alkali carbonate or hydroxide solution at a pH of 5-12 and a temperature of 20-100 degrees C; (b) removing and washing the precipitate to remove alkali ions; (c) drying the precipitate; (d) calcining the precipitate at 250-800 degrees C to a mixed oxide; (e) dispersing the mixed oxide in an acid solution of copper and zinc salts (Cu:Zn ratio is 1-20:5-1); (f) precipitating the dispersion with an alkali carbonate or hydroxide solution at a pH of 6-9 and a temperature of 20-100 degrees C; and (g) repeating steps (b) to (d). The solutions in steps (a) and/or (e) additionally contain oxides of platinum group metals, groups 5, 11 and the lanthanides.

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