公开(公告)号：US5628875A

公开(公告)日：1997-05-13

申请号：US446852

申请日：1995-06-05

申请人： Jan G. Liden ,  Leif I. Andersson

发明人： Jan G. Liden ,  Leif I. Andersson

IPC分类号： D21C11/00 ,  D21C11/02 ,  D21C11/04

CPC分类号： D21C11/0064 ,  D21C11/0085 ,  Y02P40/44 ,  Y10S423/03

摘要： When producing green liquor for later manufacture of cooking liquor, it is endeavoured that the green liquor shall be readily clarified and/or readily filtered. This endeavour is achieved with the present invention, which relates to a method of producing green liquor in which waste liquor separated from cellulose pulp and derived from a cooking stage and possibly from one or more bleaching stages is worked up including known treatment stages such as evaporation, combustion, smelt dissolving and other green liquor preparation, and in which a calcium containing chemical is added to the waste liquor prior to combustion, or is added at the combustion of the waste liquor. The method is characterized in that carbon deriving from the smelt is caused to equal at most 0.3 weight promillage, calculated on the smelt after combustion, when and after dissolving the smelt in liquid; and in that the addition of calcium is controlled so that the amount of calcium added together with the amount of calcium that is already present will equal at least 3/4 of the amount of magnesium present in the waste liquor calculated in mol; and in that the addition is at most 10% by weight of the sodium plus sulphur present in the waste liquor.

摘要翻译： PCT No.PCT / SE93 / 01028 Sec。 371日期：1995年6月5日 102（e）日期1995年6月5日PCT提交1993年11月29日PCT公布。 第WO94 / 12723号公报 日期1994年6月9日当生产用于以后制造蒸煮液的绿液时，尝试将绿液容易地澄清和/或容易地过滤。 本发明涉及生产绿液的方法，本发明涉及一种生产绿液的方法，其中从纤维素浆中分离并衍生自烹饪阶段并可能来自一个或多个漂白阶段的废液包括已知的处理阶段如蒸发 ，燃烧，熔炼溶解等绿液制备，其中将含钙化学品加入到废液中，或者在燃烧时加入废液中。 该方法的特征在于，使得从冶炼得到的碳达到等于0.3重量％以上，根据燃烧后的熔体计算，熔体溶解在液体中时和之后计算; 并且控制钙的添加使得加入的钙的量与已经存在的钙的量一起等于废液中存在的镁的至少+ E，fra 3/4 + EE 以摩尔计 并且添加量为废液中存在的钠加硫的至多10重量％。

公开(公告)号：US6126782A

公开(公告)日：2000-10-03

申请号：US663047

申请日：1996-07-08

申请人： Jan G. Liden ,  Lars .ANG.. G. Ahlenius ,  Otto S. A. G. Lindeberg ,  Sture E. O. Noreus

发明人： Jan G. Liden ,  Lars .ANG.. G. Ahlenius ,  Otto S. A. G. Lindeberg ,  Sture E. O. Noreus

IPC分类号： D21C9/10 ,  D21C9/147 ,  D21C9/153 ,  D21C9/16 ,  D21C9/14

CPC分类号： D21C9/1057 ,  D21C9/1042 ,  D21C9/147 ,  D21C9/153 ,  D21C9/163

摘要： A method for the manufacture of non-chlorine bleached pulp, from alkaline digested cellulose pulp, wherein a suspension of the cellulose pulp is subjected to a series to oxygen gas delignification (O), treatment with complexers (Q) and bleaching with non chlorine-containing oxidative bleaching agents (O,P,Z). The various treatment stages interspersed with washing and/or reconcentration of the cellulose pulp in at least one stage, in conjunction with which a suspension liquid is conveyed essentially in strict counter-current, with the result that the pulp manufacturing process is essentially totally closed with regard to the liquid circuit. The pH value of the suspension liquid, in the absence of a reduction agent, after oxygen gas delignification and onwards into the cellulose pulp treatment chain as far as the bleaching operation with the oxidative bleaching agent, is caused to attain a maximum of 10, and in that the carbonate content of the suspension liquid is caused to be the same as, or to exceed a certain lowest value depending on its position in the cellulose pulp treatment chain.

摘要翻译： PCT No.PCT / SE94 / 01204 Sec。 371日期：1996年7月8日 102（e）日期1996年7月8日PCT 1994年12月14日PCT PCT。 WO95 / 16818 PCT出版物 日期1995年6月22日从碱性消化的纤维素纸浆制造非氯漂白纸浆的方法，其中将纤维素纸浆的悬浮液与氧气脱木质素（O）进行串联处理，用络合物（Q）和 用不含氯的氧化漂白剂（O，P，Z）漂白。 各种处理阶段在至少一个阶段中散布着纤维素纸浆的洗涤和/或再浓缩，结合基本上以严格的逆流输送悬浮液，结果是纸浆制造过程基本上完全被封闭 关于液体回路。 使得在不存在还原剂的情况下，悬浮液的pH值在氧气脱木质化之后并且进入纤维素纸浆处理链，直到用氧化漂白剂的漂白操作达到最大值10，并且 由于悬浮液的碳酸盐含量与纤维素纸浆处理链中的位置相同或超过一定的最低值。