发明名称 |
HYDROPHOBISED CALCIUM CARBONATE PARTICLES |
摘要 |
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. |
申请公布号 |
HRP20140078(T1) |
申请公布日期 |
2014.04.11 |
申请号 |
HR2014P000078T |
申请日期 |
2014.01.24 |
申请人 |
OMYA INTERNATIONAL AG |
发明人 |
GANTENBEIN, DANIEL;SCHOELKOPF, JOACHIM;GANE, PATRICK A.C. |
分类号 |
D21C9/08;D21H21/02 |
主分类号 |
D21C9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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