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    PROCESS FOR PREPARING FERTILISERS CONTAINING TRACE-METALS
    2.
    发明专利
    PROCESS FOR PREPARING FERTILISERS CONTAINING TRACE-METALS 未知

    公开(公告)号：DE3162130D1

    公开(公告)日：1984-03-08

    申请号：DE3162130

    申请日：1981-10-12

    Applicant: BASF AG

    Inventor： LEUTNER BERND DR ,  PURUCKER BERNHARD DR ,  ROTHER EBERHARD DR ,  JUERGENS GEERD FRIEDRICH DR ,  WAGNER DIETER

    IPC: C05D9/02

    Abstract: A multi-trace element fertilizer which contains magnesium as a further nutrient and in which the complex-forming trace elements are present in the form of anionic chelates with one or more N-carboxyalkylaminoacids is prepared by a process wherein the N-carboxyalkylaminoacids are reacted, in the presence of water, with the trace elements or trace element compounds in a molar ratio of N-carboxyalkylaminoacids to trace elements or trace element compounds of not less than 0.8:1, at least 20% by weight of the trace element compounds being oxides, hydroxides and/or carbonates. At the same time, or subsequently, the pH of the solution is brought to 3.5-6 by adding a member selected from the group consisting of magnesium oxide, hydroxide and carbonate. A maximum of 50 equivalent percent of the magnesium compound may however be replaced by a member selected from the group consisting of alkali metal oxides, hydroxides and carbonates and ammonia.

    Wash tower for purification of inorganic fertiliser waste gases
    8.
    发明专利
    Wash tower for purification of inorganic fertiliser waste gases 未知

    公开(公告)号：DE19731504A1

    公开(公告)日：1998-01-29

    申请号：DE19731504

    申请日：1997-07-22

    Applicant: BASF AG

    Inventor： MEYER BERND DR ,  GRIMMER KARL ,  NITZSCHMANN ROBERT DR ,  JAEGER MICHAEL ,  PURUCKER BERNHARD DR ,  WUNDER RAINER DR

    IPC: B01D53/58 ,  B01D53/78 ,  C05B11/06 ,  C05G1/06 ,  B01D47/06 ,  B01D47/14

    Abstract: Joint purification in a wash column using a washing liquid of waste gases and/or vapours formed in the production of inorganic fertilisers comprises supplying the waste gases and/or vapours to the wash column in at least two separate streams. One of the gas streams is preferably a collective waste gas stream containing the waste gases and/or vapours having a high water content and a high proportion of ammonia (NH3) and where another of the streams is a collective waste gas stream from granulation and drying having a low water content and a low content of ammonia (NH3). The separate streams are distributed using individual distributor systems under fittings in the wash column, the granulation and drying gas stream being distributed above the first stream in the wash column. The wash column (VII) is filled with filling or packing materials (VIIA) and 2 or more separate collective waste gases supply lines connected to separate distributors (IX, X) below the filling in the wash column.

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