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    • 5. 发明公开
    • Hydrophobised calcium carbonate particles
    • 疏水碳酸钙
    • EP2546410A1
    • 2013-01-16
    • EP11173471.1
    • 2011-07-11
    • Omya Development AG
    • Gantenbein, DanielSchoelkopf, JoachimGane, Patrick A. C.
    • D21C9/08D21H21/02
    • C02F1/288B01J20/28016B01J20/28059B01J20/28085B01J20/3244C01B5/00C02F1/281C02F1/285C02F2103/28D21C9/08D21H17/675D21H17/69D21H21/02
    • The present invention relates to a process for the reduction of pitch in an aqueous medium generated in a papermaking or pulping process, comprising the following steps: a) providing an aqueous medium comprising pitch generated in a papermaking or pulping process; b) providing a ground calcium carbonate and/or a precipitated calcium carbonate; c) providing a hydrophobising agent selected from an aliphatic carboxylic acid having between 5 and 24 carbon atoms; d) contacting the ground calcium carbonate and/or the precipitated calcium carbonate of step b) with the hydrophobising agent of step c) for obtaining a hydrophobised ground calcium carbonate and/or a hydrophobised precipitated calcium carbonate; and e) contacting the aqueous medium provided in step a) with the hydrophobised ground calcium carbonate and/or the hydrophobised precipitated calcium carbonate obtained in step d), to the use of a hydrophobised ground calcium carbonate and/or a hydrophobised ground calcium carbonate for reducing the amount of pitch in an aqueous medium as well as to a hydrophobised ground calcium carbonate and/or a hydrophobised ground calcium carbonate and a composite of hydrophobised ground calcium carbonate and/or hydrophobised ground calcium carbonate and pitch.
    • 本发明涉及一种降低在造纸或制浆过程中产生的水性介质中的沥青的方法,包括以下步骤:a)提供包含在造纸或制浆过程中产生的沥青的水性介质; b)提供磨碎的碳酸钙和/或沉淀碳酸钙; c)提供选自具有5至24个碳原子的脂肪族羧酸的疏水化剂; d)将步骤b)的研磨的碳酸钙和/或沉淀的碳酸钙与步骤c)的疏水化剂接触以获得疏水化研磨的碳酸钙和/或疏水化沉淀碳酸钙; 和e)使步骤a)中提供的水性介质与步骤d)中获得的疏水化研磨碳酸钙和/或疏水化沉淀碳酸钙接触,使用疏水化研磨碳酸钙和/或疏水化研磨碳酸钙 减少水性介质中的沥青量以及疏水化研磨碳酸钙和/或疏水化研磨碳酸钙和疏水化研磨碳酸钙和/或疏水化研磨碳酸钙和沥青的复合物。