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    Process for preparing anhydrous sodium dithionite
    32.
    发明专利
    Process for preparing anhydrous sodium dithionite 未知

    公开(公告)号：DE4437253A1

    公开(公告)日：1995-05-04

    申请号：DE4437253

    申请日：1994-10-18

    Applicant: BASF AG

    Inventor： BITTERLICH STEFAN DR ,  HESSE WERNER DR ,  LEUTNER BERND DR ,  WOSTBROCK KARL-HEINZ DR

    IPC: C01B17/66

    Abstract: Preparation of anhydrous sodium dithionite by reacting sodium formate, sulphur dioxide and an alkaline sodium compound in aqueous-methanolic solution in a first stage, separating the precipitated product from the mother liquor, lowering the sodium thiosulphate content in the mother liquor and recycling the resulting solution to the first stage, by a) withdrawing from the mother liquor from 10 to 60% by weight of the water present therein and b) cooling the remaining solution to a temperature between -40 and 10 DEG C and separating off the precipitate thus formed.

    33.
    发明专利
    未知

    公开(公告)号：DE3778276D1

    公开(公告)日：1992-05-21

    申请号：DE3778276

    申请日：1987-08-22

    Applicant: BASF AG

    Inventor： LEUTNER BERND DR ,  MUELLER BERTHOLD DR ,  VOLKENBORN WILHELM

    IPC: C04B28/14 ,  C04B38/02 ,  E21F15/00

    Abstract: In the filling of mine cavities using a mixt. of CO2-evolving, foaming and setting slurry of mainly alpha hemihydrate, alkaline (ne earth) carbonate and water, the novelty is that, prior to introduction into the cavities, the mixt. is mixed with a hydrogen sulphate-contg. aq. soln. or suspension of one or more metals.

    PROCESS FOR PREPARING FERTILISERS CONTAINING TRACE-METALS
    38.
    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.

    40.
    发明专利
    未知

    公开(公告)号：DE19726671A1

    公开(公告)日：1998-12-24

    申请号：DE19726671

    申请日：1997-06-23

    Applicant: BASF AG

    Inventor： SCHNEIDER HANS-MICHAEL DR ,  LEUTNER BERND DR

    IPC: C07B63/04 ,  C08G73/02 ,  C09K15/20 ,  C07C211/00 ,  C07C15/46 ,  C07C211/36 ,  C07C239/08 ,  C07D295/04 ,  C08L79/02

    Abstract: The invention relates to mixtures consisting of: (a) a compound having general formula (I) R R N-A-NR R , in which R -R and A have the meanings given in the description; (b) a compound having general formula (II) R -N(OH)-R , in which R and R have the meanings given in the description; (c) optionally other components, like for example styrene or its derivatives. These mixtures are characterized by enhanced stability in relation to decomposition, as well as being effective polymerization inhibitors.

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