公开(公告)号：US09580864B2

公开(公告)日：2017-02-28

申请号：US15283711

申请日：2016-10-03

Applicant: Valmet AB

Inventor： Mikael Lindstrom ,  Fredrik Wilgotson

IPC: D21C3/02 ,  D21C3/24 ,  D21C3/26 ,  D21C7/06

CPC classification number: D21C3/022 ,  D21C3/24 ,  D21C3/26 ,  D21C7/06

Abstract: The method is for the preparation of kraft pulp with increased pulping yield from lignin-containing cellulosic material using polysulfide cooking liquor. In order to increase carbohydrate stabilization and hence the yield from a kraft cooking process a first impregnation stage using polysulfide cooking liquor is implemented at high alkali and polysulfide concentration and at a low temperature. Knots are added to a high-pressure conduit extending between an impregnation vessel and a digester.

Abstract translation: 该方法是使用多硫化物蒸煮液从含木质素的纤维素材料制备具有增加的制浆产率的牛皮纸浆。 为了增加碳水化合物的稳定性，因此从硫酸盐蒸煮工艺得到的产率，使用多硫化物蒸煮液的第一浸渍阶段是在高碱和多硫化物浓度和低温下实施的。 将结点加入到在浸渍容器和蒸煮器之间延伸的高压管道中。

公开(公告)号：US20170022663A1

公开(公告)日：2017-01-26

申请号：US15283711

申请日：2016-10-03

Applicant: Valmet AB

Inventor： Mikael Lindstrom ,  Fredrik Wilgotson

IPC: D21C3/02 ,  D21C3/26 ,  D21C3/24

CPC classification number: D21C3/022 ,  D21C3/24 ,  D21C3/26 ,  D21C7/06

Abstract: The method is for the preparation of kraft pulp with increased pulping yield from lignin-containing cellulosic material using polysulfide cooking liquor. In order to increase carbohydrate stabilization and hence the yield from a kraft cooking process a first impregnation stage using polysulfide cooking liquor is implemented at high alkali and polysulfide concentration and at a low temperature. Knots are added to a high-pressure conduit extending between an impregnation vessel and a digester.

Abstract translation: 该方法是使用多硫化物蒸煮液从含木质素的纤维素材料制备具有增加的制浆产率的牛皮纸浆。 为了增加碳水化合物的稳定性，因此从硫酸盐蒸煮工艺得到的产率，使用多硫化物蒸煮液的第一浸渍阶段是在高碱和多硫化物浓度和低温下进行的。 将结点加入到在浸渍容器和蒸煮器之间延伸的高压管道中。