| 发明名称 | Method for bleaching pulp | ||
| 摘要 | A method for bleaching pulp is provided. In the method at least one tertiary amine compound is introduced into a process stage of bleaching. This process stage is a stage which comprises mixing pulp and a chlorine compound capable of bleaching. | ||
| 申请公布号 | US9540767(B2) | 申请公布日期 | 2017.01.10 |
| 申请号 | US201314390051 | 申请日期 | 2013.04.03 |
| 申请人 | KEMIRA OYJ;ANDRITZ OY;UPM-KYMMENE CORPORATION;STORA ENSO OYJ;METSÄ FIBRE OY | 发明人 | Vuorinen Tapani;Jääskeläinen Anna-Stiina;Lindberg Andreas |
| 分类号 | D21H17/07;D21H21/32;D21C9/12;D21C9/14;D21C9/10;D21H17/66;D21H17/00 | 主分类号 | D21H17/07 |
| 代理机构 | Berggren Inc. | 代理人 | Berggren Inc. |
| 主权项 | 1. A method for bleaching pulp which pulp contains hexenuronic acid, lignin or corresponding aromatic chemical structures, wherein at least one tertiary amine compound of the general formula (1)is introduced as catalyst into a process stage of bleaching that consists essentially of mixing pulp and a chlorine compound capable of bleaching, and wherein X is N or C, and R1-R12 is the same or different alkyl group, halide, ester, alkoxide or hydrogen wherein the amount of said tertiary amine compound is a catalytic amount from at least 0.01 kg/ton of pulp to less than 3 kg/ton of pulp. | ||
| 地址 | Helsinki FI | ||