公开(公告)号：US3657065A

公开(公告)日：1972-04-18

申请号：US3657065D

申请日：1969-06-11

Applicant: SOUTH AFRICAN PULP PAPER ,  AIR LIQUIDE

Inventor： SMITH LEON ,  CALVERT DAVID W ,  ROBERT ANDRE ,  VIALLET ANDRE

IPC: D21C9/10

CPC classification number: D21C9/1036

Abstract: A method of delignifying and bleaching a chemical or semichemical cellulose pulp with oxygen gas in an alkaline medium, preferably sodium hydroxide, and in the presence of a protector, the method being characterized in that the protector is selected from the group consisting of silica; an alkali metal silicate, such as sodium silicate; an alkaline earth metal silicate, such as magnesium silicate; an alkaline earth metal phosphate, such as magnesium phosphate; an alkaline earth metal oxide, such as magnesium oxide; an alkaline earth metal peroxide; an alkaline earth metal hydroxide or a material forming an alkaline earth metal hydroxide, such as magnesium hydroxide or a material forming magnesium hydroxide in situ; and a soluble salt of magnesium other than magnesium carbonate.

Abstract translation: 一种在碱性介质（优选氢氧化钠）中用氧气将化学或半化学纤维素纸浆脱木质素和脱色的方法，并且在保护剂存在下，该方法的特征在于保护剂选自二氧化硅 ; 碱金属硅酸盐，如硅酸钠; 碱土金属硅酸盐，如硅酸镁; 碱土金属磷酸盐，如磷酸镁; 碱土金属氧化物，如氧化镁; 碱土金属过氧化物; 碱土金属氢氧化物或形成碱土金属氢氧化物如氢氧化镁或原位形成氢氧化镁的材料的材料; 以及碳酸镁以外的镁的可溶性盐。

公开(公告)号：US3660225A

公开(公告)日：1972-05-02

申请号：US3660225D

申请日：1969-07-10

Applicant: SOUTH AFRICAN PULP PAPER ,  AIR LIQUIDE ,  KAMYR AB

Inventor： VERREYNE ABRAHAM JACOB ,  JOB LEONARD AUSTIN ,  REROLLE PAUL ,  RICHTER JOHAN C F C

IPC: B01F7/00 ,  B01F7/26 ,  B01F15/00 ,  D21C9/10 ,  D21C3/26

CPC classification number: B01F7/26 ,  B01F7/00633 ,  B01F15/00883 ,  B01F15/00896 ,  D21C9/10 ,  D21C9/1026

Abstract: A method of dividing a stream of pulp into a series of layers comprising discrete batches and progressively transferring the batches from layer to layer in controlled fashion so that the height of each layer does not exceed a maximum value at which the pulp at the bottom of a layer has a predetermined minimum gaseous content, the pulp being contacted with oxygen gas under pressure while progressively transferring pulp from one layer to the next in the series. The method may occur in an apparatus comprising a cylindrical pressure vessel including axially spaced floors which define chambers between them, the chambers being subdivided into a plurality of compartments by dividing walls disposed axially to the pressure vessel and transversely to the floors, each floor having an aperture and the compartments and floors being relatively movable to allow pulp in the compartments sequentially to be transferred from one chamber to the next as relative movement occurs.

Abstract translation: 将纸浆流分成包括离散批次的一系列层并以受控方式逐步地将层从层间转移到层的方法，使得每一层的高度不超过最低值 层具有预定的最小气体含量，纸浆在压力下与氧气接触，同时逐渐将纸浆从系列中的一层传送到下一层。 该方法可以在包括圆柱形压力容器的装置中发生，所述圆柱形压力容器包括在其间限定腔室的轴向间隔的地板，所述腔室通过分隔成轴向地连接到压力容器并横向于地板的壁细分成多个隔室，每个地板具有 孔和隔间和地板是可相对移动的，以允许隔间中的纸浆相对运动发生时从一个室转移到另一个室。