公开(公告)号：US09567710B2

公开(公告)日：2017-02-14

申请号：US14453282

申请日：2014-08-06

Applicant: BASF SE

Inventor： Christian Jehn-Rendu ,  Joachim Hege ,  Detlef Kannengiesser

IPC: D21H21/10 ,  D21C9/18 ,  D21C9/00 ,  D21H17/37 ,  D21H17/45 ,  D21H17/56

CPC classification number: D21H21/10 ,  D21C9/002 ,  D21C9/18 ,  D21H17/37 ,  D21H17/375 ,  D21H17/45 ,  D21H17/56

Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyltrimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.

Abstract translation: 本发明的方法提供了脱水纸浆的改进的排水时间和固体含量。

公开(公告)号：US20150027651A1

公开(公告)日：2015-01-29

申请号：US14453282

申请日：2014-08-06

Applicant: BASF SE

Inventor： Christian JEHN-RENDU ,  Joachim Hege ,  Detlef Kannengiesser

IPC: D21H21/10 ,  D21H17/56 ,  D21H17/45 ,  D21H17/37

CPC classification number: D21H21/10 ,  D21C9/002 ,  D21C9/18 ,  D21H17/37 ,  D21H17/375 ,  D21H17/45 ,  D21H17/56

Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyltrimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.

Abstract translation: 一种制浆工艺，其中将纤维状纤维素材料制浆以形成纤维素材料的水悬浮液，将悬浮液通过筛网排出以形成纸浆片，并将纸浆片干燥以形成干市场纸浆，其中水 将可溶性阳离子聚合物作为唯一的助溶剂加入到悬浮液中，其中水溶性阳离子聚合物为：i）包含（a）1-70摩尔％（甲基）丙烯酰胺和（b）30-99摩尔 ％（甲基）丙烯酰氧基乙基三甲基氯化铵，特性粘度在5至9dl / g之间; 或ii）乙烯基甲酰胺的水解均聚物，其包含1至100摩尔％的乙烯基胺单元并且具有45至240的K值。本发明的方法提供了脱水纸浆的改进的排水时间和固体含量。