基本信息:
- 专利标题： PROCESS FOR PREPARING KRAFT PULP
- 专利标题（中）：用于生产硫酸盐浆
- 申请号：EP91903366.2 申请日：1991-02-11
- 公开(公告)号：EP0468016B1 公开(公告)日：1996-08-14
- 发明人： TIKKA, Panu, Olavi
- 申请人： SUNDS DEFIBRATOR PORI OY
- 申请人地址： PL 34 SF-28101 Pori FI
- 专利权人： SUNDS DEFIBRATOR PORI OY
- 当前专利权人： METSO CHEMICAL PULPING OY
- 当前专利权人地址： METSO CHEMICAL PULPING OY
- 代理机构： Liedl, Christine, Dipl.-Chem.
- 优先权： FI900663 19900209
- 国际公布： WO9112368 19910822
- 主分类号： D21C3/02
- IPC分类号： D21C3/02 ; D21C1/06
摘要：
Processes for preparing kraft pulp are disclosed. The processes include pretreating cellulosic material or chips with spent cooking liquor at the temperature of about 20 to 100 °C, followed by heating the impregnated chips at the temperature of from about 120 to 180 °C, followed by digestion of the lignin with white liquor, which is facilitated by using this pretreatment process.
IPC结构图谱:
| D | 纺织；造纸 |
| --D21 | 造纸；纤维素的生产 |
| ----D21C | 从含纤维素原料中除去非纤维素物质生产纤维素；制浆药液的再生；所需设备 |
| ------D21C3/00 | 含纤维素原料制浆 |
| --------D21C3/02 | .用无机碱或碱性化合物，如硫酸盐法 |