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1. 发明申请

WO2012158075A1 COMPACT PROCESS FOR PRODUCING PREHYDROLYZED PULP 审中-公开
标题翻译：用于生产预溶胶浆的紧凑方法
公开(公告)号：WO2012158075A1
公开(公告)日：2012-11-22
申请号：PCT/SE2011/050610
申请日：2011-05-13
申请人： METSO PAPER SWEDEN AB , TROLIN, Daniel , ANTONSSON, Stefan , SAETHERÅSEN, Jonas , LINDSTRÖM, Mikael
发明人： TROLIN, Daniel , ANTONSSON, Stefan , SAETHERÅSEN, Jonas , LINDSTRÖM, Mikael
IPC分类号： D21C1/02 , D21C1/04 , D21C1/06 , D21C3/02 , D21C3/26
CPC分类号： D21C1/02 , D21C1/04 , D21C1/06 , D21C3/02 , D21C3/26
摘要： The invention is related to an improved compact process for producing dissolving pulp in a prehydrolysis kraft cooking process. In order to avoid pitch problems with blocked withdrawal screens and to obtain a distinct ending of the prehydrolysis stage, as well as a thorough alkaline impregnation ahead of the kraft cook stage, alkali is charged to the mixture of prehydrolyzed material to such an extent that the residual alkali concentration after neutralization of the acidic hydrolysate is above 20 g/l EA as NaOH and the temperature of the resulting alkaline treatment liquor for the prehydrolyzed material is lowered by at least 10% in comparison to the temperature in the prehydrolysis stage. The alkali charge will avoid redeposition of hemicelluloses dissolved in the prehydrolyse stage and will abruptly swing the wood material mixture to alkaline conditions favourable for a alkali impregnation stage at reduced temperature ahead of the final kraft cooking stage, which impregnation stage will extract the major part of the hemicelluloses content of the cellulose material.
摘要翻译：本发明涉及在预水解硫酸盐蒸煮工艺中生产溶解纸浆的改进的紧密方法。为了避免堵塞抽出筛选的沥青问题，并获得预水解阶段的明显结束，以及在硫酸盐蒸煮阶段之前的彻底的碱浸渍，将碱加入到预水解材料的混合物中，使得酸性水解产物中和后的残留碱浓度为NaOH高于20g / l EA，预水解物质的碱处理液的温度与预水解阶段的温度相比降低至少10％。碱充电将避免溶解在预水解阶段的半纤维素的再沉积，并且将在最终的硫酸盐蒸煮阶段之前将木质材料混合物突然摇摆到有利于降低温度的碱浸渍阶段的碱性条件下，该浸渍阶段将提取主要部分纤维素材料的半纤维素含量。

2. 发明申请

WO2016032374A1 COST EFFICIENT KRAFT COOKING METHOD USING POLYSULFIDE COOKING LIQUOR 审中-公开
标题翻译：使用多糖烹饪液成本高效的克拉夫烹饪方法
公开(公告)号：WO2016032374A1
公开(公告)日：2016-03-03
申请号：PCT/SE2014/050975
申请日：2014-08-26
申请人： VALMET AB , ANTONSSON, Stefan , OLSSON, Krister
发明人： ANTONSSON, Stefan , OLSSON, Krister
IPC分类号： D21C1/06 , D21C3/02 , D21C3/24
CPC分类号： D21C3/022 , D21C1/06 , D21C3/24
摘要： The invention is related to a method for the preparation of kraft pulp with increased pulping yield from lignin-containing cellulosic material using polysulfide cooking liquor. In order to obtain a cost efficient system both in aspects of investment costs but also in aspects of heat economy of operating the process is most of the total charge of alkali charged as heated polysulfide liquor to an first atmospheric vessel, wherein the hot polysulfide liquor flashes off steam providing most if not all of the necessary steaming effect for the cellulose material. The polysulfide liquor is then allowed to impregnate the cellulose material at a temperature closer to cooking temperature but still so low that essentially no delignification occurs in impregnation vessel, as the H-factor in impregnation vessel is kept within 1-20.
摘要翻译：本发明涉及一种使用多硫化物蒸煮液从含木质素的纤维素材料制备牛皮纸浆的方法，该方法具有增加的含木质纤维素材料的制浆量。为了在投资成本方面获得成本有效的系统，而且在操作的热经济方面，大部分作为加热的多硫化合物加入到第一大气容器中的碱的总电荷，其中热的多硫化物液体闪烁蒸汽提供纤维素材料的大部分（如果不是全部）必要的蒸汽效果。然后允许多硫化物液体在更接近烹饪温度的温度下浸渍纤维素材料，但仍然低至浸渍容器中基本上不会发生脱木质素，因为浸渍容器中的H-因子保持在1-20℃内。

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