公开(公告)号：WO2018046482A1

公开(公告)日：2018-03-15

申请号：PCT/EP2017/072204

申请日：2017-09-05

Applicant: SUNCARBON AB

Inventor： ARKELL, Anders

IPC: D21C11/00 ,  D21H11/10 ,  D21H11/12 ,  D21C11/10 ,  D21C11/12

Abstract: A system (10) for treating spent pulping liquor (14) comprising lignin to provide green liquor (47) is disclosed. The system (10) comprises an evaporator (22), a recovery boiler (34), at least one filter (58, 74), and a green liquor plant (46). The evaporator (22) concentrates a first stream (18) of the spent pulping liquor (14) to provide a concentrated pulping liquor (30). The recovery boiler (34) incinerates the concentrated pulping liquor (30) to provide a smelt (42). The at least one filter (58, 74) filters a second stream (54) of the spent pulping liquor (14) to remove lignin therefrom to provide a permeate (66, 82). The green liquor plant (46) is for dissolving the smelt (42) from the recovery boiler (34) in the permeate (66, 82) from the at least one filter (58, 74) to provide green liquor (47). Also disclosed is a method for treating spent pulping liquor (14) to provide green liquor (47).

Abstract translation: 公开了用于处理包含木质素以提供绿液（47）的废制浆液（14）的系统（10）。 系统（10）包括蒸发器（22），回收锅炉（34），至少一个过滤器（58,74）和绿液工厂（46）。 蒸发器（22）浓缩废浆液（14）的第一股物流（18）以提供浓缩的制浆液（30）。 回收锅炉（34）焚烧浓缩制浆液（30）以提供熔融物（42）。 所述至少一个过滤器（58,74）过滤废浆液（14）的第二物流（54）以从中除去木质素以提供渗透物（66,82）。 绿液设备（46）用于将来自至少一个过滤器（58,74）的来自回收锅炉（34）的熔体（42）溶解在渗透物（66,82）中以提供绿液（47）。 还公开了一种处理废浆液（14）以提供绿液（47）的方法。

公开(公告)号：WO2020013752A1

公开(公告)日：2020-01-16

申请号：PCT/SE2019/050662

申请日：2019-07-03

Applicant: SUNCARBON AB

Inventor： ARKELL, Anders ,  SUNDIN, Martin

IPC: D21C11/00

Abstract: Disclosed is a process for purifying lignin comprising metal cations. The process comprising the consecutive steps of: (a) providing lignin to be purified by acidifying black liquor, and subsequently separating the thereby formed raw lignin phase (LP3); (b) dissolving the raw lignin phase (LP3) in an acidic, aqueous solvent, at a temperature of at least 50°C, such as at least 60, 70°C, 80°C, or 90°C, to provide a liquid one-phase system (OPS) comprising dissolved lignin; (c) triggering phase separation by diluting the one-phase system by adding water, and/or by lowering the temperature of the one-phase system, to provide a two-phase system, in which two-phase system the first phase is a lignin rich phase (LP1), and the second phase is a liquid, aqueous phase poor in lignin and comprising metal cations extracted from the lignin; and (d) separating the lignin rich phase (LP1) from the two-phase system to recover purified lignin.