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    VERFAHREN ZUR HERSTELLUNG VON NATRIUMDITHIONIT
    1.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON NATRIUMDITHIONIT 审中-公开
    用于生产钠

    公开(公告)号：EP1809574A2

    公开(公告)日：2007-07-25

    申请号：EP05805323.2

    申请日：2005-11-03

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： DIEFENBACHER, Armin ,  VOSS, Hartwig ,  SCHNEIDER, Reinhard

    IPC分类号： C01B17/66

    CPC分类号： C01B17/66

    摘要： The invention relates to a method for producing sodium dithionite comprising the steps (a) production of a synthesis batch consisting of sodium formate, sulphur dioxide and an alkaline sodium compound in an aqueous methanol solvent, which forms a sodium dithionite mother liquor, (b) separation of the sodium dithionite from the sodium dithionite mother liquor, leaving a residual mother liquor, (c) separation of methanol from the residual mother liquor, (d) separation of the residual mother liquor into a first sub-stream that is rich in thiosulphate and a second sub-stream that is devoid of thiosulphate, but contains formate by means of a nanofiltration, (e) concentration of sodium formate in the second sub-stream and (f) return of the concentrated second sub-stream to step (a).

    VERFAHREN ZUR HERSTELLUNG VON GEFÄLLTEM CALCIUMCARBONAT MIT HOHEM WEISSGRAD
    3.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON GEFÄLLTEM CALCIUMCARBONAT MIT HOHEM WEISSGRAD 有权
    用于生产沉淀碳酸钙HIGH BRIGHTNESS

    公开(公告)号：EP1487927A1

    公开(公告)日：2004-12-22

    申请号：EP03743864.5

    申请日：2003-03-11

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： MISSKE, Andrea ,  SCHNEIDER, Reinhard

    IPC分类号： C09C1/02 ,  C01F11/18

    CPC分类号： C01F11/183 ,  C01F11/185 ,  C01P2006/60 ,  C09C1/021

    摘要： Disclosed is calcium carbonate with a high degree of brightness, which is produced by treating calcium carbonate, and/or the milk of lime used for the production thereof by reacting milk of lime with carbon dioxide, and/or at least one of the calcium-containing intermediate products used for the production of milk of lime, with a bleaching agent before, during, and/or following said reaction. Said bleaching agent contains at least one compound of formula A[(CR1R2)SOpM(1/q)]r (I), in which A represents NR3R4, NR3, N, or OH; R1, R2, R3, R4 independently represent hydrogen or an organic radical; M represents ammonium or a metal; p represents 2 or 3; q represents the valence of M; and r represents 1 if A=OH or NR3R4, 2 if A=NR3, and 3 if A=N. Said variables are independently selected for each individual compound and/or each [(CR1R2)SOpM(1/q)] group if a mixture of compounds is used and/or if r=2 or 3.

    AGGLOMERIERTE POLYMERTEILCHEN AUS FEINTEILIGEN, WASSERLÖSLICHEN ODER WASSERQUELLBAREN AMMONIUMCARBOXYLATGRUPPEN ENTHALTENDEN POLYMERISATEN
    4.
    发明公开
    AGGLOMERIERTE POLYMERTEILCHEN AUS FEINTEILIGEN, WASSERLÖSLICHEN ODER WASSERQUELLBAREN AMMONIUMCARBOXYLATGRUPPEN ENTHALTENDEN POLYMERISATEN 失效
    附聚的聚合物微粒，水溶性或水羧酸铵含有聚合物的

    公开(公告)号：EP0784636A1

    公开(公告)日：1997-07-23

    申请号：EP95934108.0

    申请日：1995-09-23

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： RÜBENACKER, Martin ,  SCHNEIDER, Reinhard ,  NIEBERLE, Jürgen ,  HARTMANN, Heinrich ,  DENZINGER, Walter ,  KISTENMACHER, Axel

    IPC分类号： C08F2 ,  C08F6 ,  C08F220

    CPC分类号： C08F220/04 ,  C08F6/18

    摘要： The invention concerns agglomerated particles of finely divided polymers which are water-soluble or capable of swelling in water and contain ammonium carboxlyate groups, and a process for their preparation by azeotropic dehydration of water-in-oil emulsions of the polymers, which are water-soluble or capable of swelling in water and contain ammonium carboxylate groups, in the presence of 0.1 to 40 wt %, relative to the polymers, of polyalkylene glycols, which have an agglomerating effect and are obtained by the addition of C2 to C4 alkylene oxides to alcohols, phenols, amines or carboxylic acids and which contain at least two alkylene oxide units incorporated by polymerization, and additionally from 0.1 to 20 wt %, relative to the polymers, of protective colloids which are obtained by radical copolymerization of C8 to C40 mono-olefins with monoethylenically unsaturated C4 to C6 dicarboxylic acid anhydrides in the manner of a substance polymerization at temperatures from 80 to 300 °C to form copolymers having molar masses of 500 to 20,000 g/mol. The invention further concerns the use of the agglomerated polymer particles as thickeners for textile pigment printing inks.

    AGGLOMERIERTE POLYMERTEILCHEN AUS FEINTEILIGEN, WASSERLÖSLICHEN ODER WASSERQUELLBAREN AMMONIUMCARBOXYLATGRUPPEN ENTHALTENDEN POLYMERISATEN
    8.
    发明授权
    AGGLOMERIERTE POLYMERTEILCHEN AUS FEINTEILIGEN, WASSERLÖSLICHEN ODER WASSERQUELLBAREN AMMONIUMCARBOXYLATGRUPPEN ENTHALTENDEN POLYMERISATEN 失效
    附聚的聚合物微粒，水溶性或水羧酸铵含有聚合物的

    公开(公告)号：EP0784636B1

    公开(公告)日：1998-12-02

    申请号：EP95934108.2

    申请日：1995-09-23

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： RÜBENACKER, Martin ,  SCHNEIDER, Reinhard ,  NIEBERLE, Jürgen ,  HARTMANN, Heinrich ,  DENZINGER, Walter ,  KISTENMACHER, Axel

    IPC分类号： C08F6/22 ,  C08F2/32

    CPC分类号： C08F220/04 ,  C08F6/18

    摘要： The invention concerns agglomerated particles of finely divided polymers which are water-soluble or capable of swelling in water and contain ammonium carboxlyate groups, and a process for their preparation by azeotropic dehydration of water-in-oil emulsions of the polymers, which are water-soluble or capable of swelling in water and contain ammonium carboxylate groups, in the presence of 0.1 to 40 wt %, relative to the polymers, of polyalkylene glycols, which have an agglomerating effect and are obtained by the addition of C2 to C4 alkylene oxides to alcohols, phenols, amines or carboxylic acids and which contain at least two alkylene oxide units incorporated by polymerization, and additionally from 0.1 to 20 wt %, relative to the polymers, of protective colloids which are obtained by radical copolymerization of C8 to C40 mono-olefins with monoethylenically unsaturated C4 to C6 dicarboxylic acid anhydrides in the manner of a substance polymerization at temperatures from 80 to 300 DEG C to form copolymers having molar masses of 500 to 20,000 g/mol. The invention further concerns the use of the agglomerated polymer particles as thickeners for textile pigment printing inks.