公开(公告)号：WO1996005365A1

公开(公告)日：1996-02-22

申请号：PCT/US1995010391

申请日：1995-08-08

Applicant: INGERSOLL-RAND COMPANY

Inventor： INGERSOLL-RAND COMPANY ,  SHACKFORD, Lewis, D.

IPC: D21C09/10

CPC classification number: D21C9/10 ,  B01J3/02 ,  D21C7/06

Abstract: A wall passageway, having openings therein only at opposite, inlet (14) and outlet (18) ends thereof, has a shaft (22) journalled therein. The shaft carries a screw thereon for moving shredded pulp through the passageway. The screw (24) is foreshortened, having a length less than that of the passage way, and causes inlet-admitted pulp to form into a continuously moving pulp plug. The plug, albeit having some porosity, comprises a gas seal within the passageway, and inhibits any migration of downstream gas from escaping to the atmosphere via the passageway and the inlet (14) thereof. In addition, a source (32) of oxygen or such gas as is inert to any downstream process is controllingly admitted into the inlet (14) to maintain an upstream pressure equal to, or greater than any downstream process pressure to insure against release of downstream gas into the atmosphere.

Abstract translation: 在其中仅在其相对的入口（14）和出口（18）端部处具有开口的壁通道具有轴颈（22）。 轴上带有一个螺丝，用于使切碎的纸浆通过通道。 螺杆（24）被缩短，其长度小于通道的长度，并且使入口进入的纸浆形成连续移动的纸浆塞。 塞子尽管具有一些孔隙度，但在通道内包括气体密封，并且阻止下游气体经由通道及其入口（14）逸出到大气中的任何迁移。 此外，对任何下游过程是惰性的氧气或这种气体源（32）被控制地进入入口（14）以保持上游压力等于或大于任何下游过程压力，以确保下游的释放 气体进入大气。

公开(公告)号：WO1996001920A1

公开(公告)日：1996-01-25

申请号：PCT/US1995008137

申请日：1995-06-29

Applicant: INGERSOLL-RAND COMPANY ,  PULP AND PAPER RESEARCH INSTITUTE OF CANADA

Inventor： INGERSOLL-RAND COMPANY ,  PULP AND PAPER RESEARCH INSTITUTE OF CANADA ,  SHACKFORD, Lewis, D. ,  MILLER, William, J. ,  ROY, Brian, P. ,  VAN LIEROP, Barbara ,  BERRY, Richard, M.

IPC: D21C09/16

CPC classification number: D21C9/1026 ,  D21C9/1057 ,  D21C9/163

Abstract: A method for bleaching cellulosic and lignocellulosic pulp using hydrogen peroxide as a bleaching reagent, utilizes a two-step reaction, viz. a short high temperature step at a pressure sufficient to suppress boiling and a longer atmospheric pressure reduced temperature step to consume a substantial portion of the hydrogen peroxide remaining after the short phase. The method includes the steps of introducing pulp (15), at a consistency of 10 %-18 %, to a mixer (100) in which the pulp is heated to a temperature above 100 DEG C; adding sufficient sodium hydroxide to bring the pulp to a pH of 8.5; adding sufficient hydrogen peroxide (36) to equal from about 0.5 %-5.0 %, by weight, of the pulp; passing the pulp through a pressurized reactor column (400) at a rate providing a reaction time in the column of between 1 and 30 minutes; and depositing the pulp in a reaction tower and allowing the reaction to proceed for 1-5 hours until a substantial portion of the residual hydrogen peroxide has been consumed. It may be desirable to introduce the pulp to a mixer and add alkali to reactivate residual hydrogen peroxide by bringing the pulp to a pH of at least 9 between bleaching steps.

Abstract translation: 使用过氧化氢作为漂白剂漂白纤维素和木质纤维素纸浆的方法采用两步反应，即， 在足以抑制沸腾的压力下的短的高温步骤和较长的大气压降低温度步骤以消耗在短相后残留的大部分过氧化氢。 该方法包括将纸浆（15）以10％-18％的浓度引入到其中将纸浆加热至高于100℃的混合器（100）的步骤; 加入足够的氢氧化钠使纸浆的pH值达到8.5; 加入足量的过氧化氢（36）至浆料重量的约0.5％-5.0％; 使纸浆通过加压反应器塔（400），其速率为提供柱在1至30分钟之间的反应时间; 并将纸浆沉积在反应塔中，并允许反应进行1-5小时，直到大部分残余过氧化氢消耗。 可能需要将纸浆引入混合器中，并通过在漂白步骤之间使纸浆达到至少9的pH来添加碱以再活化剩余的过氧化氢。