公开(公告)号：WO2006031175A1

公开(公告)日：2006-03-23

申请号：PCT/SE2005/001301

申请日：2005-09-08

Applicant: STFI-PACKFORSK AB ,  ÖHMAN, Fredrik ,  THELIANDER, Hans ,  TOMANI, Per ,  AXEGARD, Peter

Inventor： ÖHMAN, Fredrik ,  THELIANDER, Hans ,  TOMANI, Per ,  AXEGARD, Peter

IPC: D21C11/00

CPC classification number: D21C11/0007 ,  Y02P40/44

Abstract: The present invention provides a method for separation of lignin from black liquor comprising the following steps: a) Precipitation of lignin by acidifying black liquor and thereupon dewatering, b) suspending the lignin filter cake obtained in step a) whereupon a second lignin suspension is obtained and adjusting the pH level to approximately the pH level of the washing water of step d) below, c) dewatering of the second lignin suspension, d) addition of washing water and performing a displacement washing at more or less constant conditions without any dramatic gradients in the pH, and e) dewatering of the lignin cake produced in step d) into a high dryness and displacement of the remaining washing liquid in said filter cake, whereby a lignin product is obtained which has an even higher dryness after the displacement washing of step e). The present invention also provides a lignin product or an intermediate lignin product obtainable by the above method. The present invention also provides use, preferably for the production of heat or chemicals, of said lignin product or said intermediate lignin product.

Abstract translation: 本发明提供了一种从黑液中分离木质素的方法，包括以下步骤：a）通过酸化黑液并随后脱水来沉淀木质素，b）悬浮步骤a）中获得的木质素滤饼，由此获得第二木质素悬浮液 并且将pH水平调节到下面步骤d）的洗涤水的大约pH值水平，c）第二木质素悬浮液的脱水，d）加入洗涤水并在或多或少的恒定条件下进行置换洗涤，而没有任何显着的梯度 在pH值中，e）将步骤d）中产生的木质素滤饼脱水到所述滤饼中的高干燥度和剩余洗涤液体的位移，由此得到木质素产物，其在置换洗涤后具有更高的干燥度 步骤e）。 本发明还提供可通过上述方法获得的木质素产品或中间木质素产品。 本发明还提供了用于生产所述木质素产物或所述中间体木质素产物的热或化学物质的用途。

公开(公告)号：WO2007120091A1

公开(公告)日：2007-10-25

申请号：PCT/SE2007/000095

申请日：2007-02-02

Applicant: STFI-PACKFORSK AB ,  DAHLMAN, Olof ,  TOMANI, Per ,  AXEGARD, Peter ,  LUNDQVIST, Fredrik ,  LONDGREN, Karin

Inventor： DAHLMAN, Olof ,  TOMANI, Per ,  AXEGARD, Peter ,  LUNDQVIST, Fredrik ,  LONDGREN, Karin

IPC: C07H1/06 ,  D21C11/04 ,  C08B37/14 ,  C08H5/04

CPC classification number: D21C11/0007 ,  C07H1/06 ,  C08B37/0057 ,  C08H8/00

Abstract: The present invention provides a method for extracting polymeric pentose, preferably xylan, from a polymeric pentose containing liquid/slurry, preferably black liquor, comprising the following steps: a) providing a polymeric pentose containing liquid/slurry; b) concentrating the polymeric pentose by membrane separation of a said polymeric pentose containing liquid/slurry; and c) adding alcohol to the concentrate obtained in step b) and subsequently acidifying said concentrate obtained in step b) for precipitating polymeric pentose whereby a polymeric pentose product, or an intermediate polymeric pentose product, is obtained. In this above way polymeric pentose, e.g. xylan, is separated whereby the use of methanol (less lignin must be kept in solution) and acid (less acid which buffers the pH- decrease) become much lower. The present invention also provides according to a second aspect a polymeric pentose product or an intermediate polymeric pentose product obtainable by the method according to the first aspect. The present invention also provides according to a third aspect use, preferably for the production of food additives or as chemical feed stock, of the polymeric pentose product or the intermediate polymeric pentose product of the second aspect of the invention.

Abstract translation: 本发明提供了从含聚合戊糖的液体/浆液（优选黑液）中提取聚合戊糖，优选木聚糖的方法，包括以下步骤：a）提供含有聚合物的含有戊糖的液体/浆液; b）通过膜分离所述含聚合戊糖的液体/浆液来浓缩聚合戊糖; 和c）向步骤b）中获得的浓缩物中加入醇，然后酸化步骤b）中获得的浓缩物，以沉淀聚合戊糖，由此得到聚合戊糖产物或中间聚合戊糖产物。 以上述方式，聚合戊糖，例如 木聚糖被分离，由此使用甲醇（较少的木质素必须保持在溶液中）和酸（较少酸，缓冲pH-降低）变得低得多。 本发明还提供根据第二方面的聚合物戊糖产物或通过根据第一方面的方法可获得的中间聚合戊糖产物。 本发明还提供了根据第三方面的用途，优选用于生产本发明第二方面的聚合戊糖产物或中间聚合戊糖产品的食品添加剂或化学原料。

公开(公告)号：EP1994041A1

公开(公告)日：2008-11-26

申请号：EP07709311.0

申请日：2007-02-02

Applicant: STFI-Packforsk AB

Inventor： DAHLMAN, Olof ,  TOMANI, Per ,  AXEGARD, Peter ,  LUNDQVIST, Fredrik ,  LINDGREN, Karin

IPC: C07H1/06

CPC classification number: D21C11/0007 ,  C07H1/06 ,  C08B37/0057 ,  C08H8/00

Abstract: The present invention provides a method for extracting polymeric pentose, preferably xylan, from a polymeric pentose containing liquid/slurry, preferably black liquor, comprising the following steps: a) providing a polymeric pentose containing liquid/slurry; b) concentrating the polymeric pentose by membrane separation of a said polymeric pentose containing liquid/slurry; and c) adding alcohol to the concentrate obtained in step b) and subsequently acidifying said concentrate obtained in step b) for precipitating polymeric pentose whereby a polymeric pentose product, or an intermediate polymeric pentose product, is obtained. In this above way polymeric pentose, e.g. xylan, is separated whereby the use of methanol (less lignin must be kept in solution) and acid (less acid which buffers the pH- decrease) become much lower. The present invention also provides according to a second aspect a polymeric pentose product or an intermediate polymeric pentose product obtainable by the method according to the first aspect. The present invention also provides according to a third aspect use, preferably for the production of food additives or as chemical feed stock, of the polymeric pentose product or the intermediate polymeric pentose product of the second aspect of the invention.