公开(公告)号：WO1994010377A1

公开(公告)日：1994-05-11

申请号：PCT/CA1993000402

申请日：1993-10-07

Applicant: MACMILLAN BLOEDEL LIMITED ,  UNIVERSITY OF NEW BRUNSWICK

Inventor： MACMILLAN BLOEDEL LIMITED ,  UNIVERSITY OF NEW BRUNSWICK ,  SOLINAS, Marco ,  MURPHY, Thomas, Howard ,  VAN HEININGEN, Adriaan, Reinhard, Pieter ,  NI, Yonghao

IPC: D21C09/153

CPC classification number: D21C9/101 ,  D21C9/1026 ,  D21C9/153

Abstract: A bleached pulp having a high viscosity for a given permanganate number is formed by pretreating never dried pulp with an organic solvent medium to produce a treated pulp composed of said never dried pulp in the medium and then bleaching that treated pulp using ozone at a pH of 1.5-5 to provide a bleached pulp while reducing the viscosity loss during the ozone bleaching step significantly compared to that what would occur if the medium used in the ozone bleaching were water.

Abstract translation: 通过用有机溶剂介质预处理未干燥的纸浆来形成对于给定的高锰酸盐数量具有高粘度的漂白纸浆，以在培养基中产生由所述未干燥纸浆组成的处理纸浆，然后使用臭氧在pH为 1.5-5以提供漂白纸浆，同时与臭氧漂白中使用的介质为水时相比，臭氧漂白步骤中的粘度损失显着降低。

公开(公告)号：WO1998020199A1

公开(公告)日：1998-05-14

申请号：PCT/CA1997000813

申请日：1997-10-30

Applicant: MACMILLAN BLOEDEL LIMITED

Inventor： MACMILLAN BLOEDEL LIMITED ,  TAN, Zheng ,  SOLINAS, Marco

IPC: D21C09/10

CPC classification number: D21C9/147 ,  D21C9/1036

Abstract: A catalyst selected from vanadyl organic complexes and vanadyl sulfate is applied to lignocellulosic material together with oxygen to form a treated pulp and the treated pulp is then subjected to a caustic extraction to produce an improved pulp. The process may be applied to a chemical pulp or a mechanical pulp to obtain delignification or lignin modification. In the case of a chemical pulp, delignification improves the brightness of the pulp whereas in the case of a mechanical pulp, fiber conformability significantly improves.

Abstract translation: 将选自氧钒基有机络合物和硫酸氧钒的催化剂与氧一起施用于木质纤维素材料以形成经处理的纸浆，然后对经处理的纸浆进行苛性萃取以产生改良的纸浆。 该方法可以应用于化学纸浆或机械纸浆以获得脱木质素或木质素改性。 在化学纸浆的情况下，脱木质素改善了纸浆的亮度，而在机械纸浆的情况下，纤维的一致性明显改善。

公开(公告)号：WO1993017178A1

公开(公告)日：1993-09-02

申请号：PCT/CA1993000052

申请日：1993-02-16

Applicant: MacMILLAN BLOEDEL LIMITED

Inventor： MacMILLAN BLOEDEL LIMITED ,  SOLINAS, Marco ,  MURPHY, Thomas, Howard

IPC: D21C09/10

CPC classification number: D21C9/1005 ,  D21C9/1036 ,  D21C9/153

Abstract: A method of bleaching a chemical pulp by adjusting the pH of the pulp to 1.5-3.5, chelating the pulp and then treating the pulp in an N stage with nitric oxyde (NO) in the amount of at least 1.5 % by weight of the oven dried pulp at a consistency of between 30 and 55 % and further treating the pulp in a Z stage with ozone to produce a bleach pulp having a higher viscosity for a given permanganate number compared with a similar pulp bleached without using the N stage.

Abstract translation: 通过将纸浆的pH调节至1.5-3.5，螯合纸浆，然后在N阶段用硝酸氧化物（NO）处理纸浆至少1.5％（重量）的烘箱来漂白化学纸浆的方法 干浆的浓度为30％至55％之间，并进一步用臭氧处理Z阶段的纸浆，以产生与不使用N级漂白的类似纸浆相比，给定高锰酸盐数量粘度较高的漂白纸浆。

公开(公告)号：WO1996027705A1

公开(公告)日：1996-09-12

申请号：PCT/CA1996000074

申请日：1996-02-07

Applicant: MacMILLAN BLOEDEL LIMITED ,  HARMAC PACIFIC INC.

Inventor： MacMILLAN BLOEDEL LIMITED ,  HARMAC PACIFIC INC. ,  McKENZIE, Douglas, John ,  SOLINAS, Marco ,  MURPHY, Thomas, Howard

IPC: D21C09/10

CPC classification number: D21C9/101 ,  D21C9/163

Abstract: A method of bleaching of pulps using peroxide as the primary bleaching agent in an aqueous medium having between 10-50 % ethylene glycol at a consistency of between 8 and 35 % to thereby produce a peroxide bleached pulp.

Abstract translation: 一种使用过氧化物作为初级漂白剂的纸浆漂白在水性介质中的方法，所述水性介质中的10-50％乙二醇的稠度在8至35％之间，从而产生过氧化物漂白的纸浆。

公开(公告)号：WO1996001340A1

公开(公告)日：1996-01-18

申请号：PCT/CA1995000373

申请日：1995-06-27

Applicant: MACMILLAN BLOEDEL LIMITED

Inventor： MACMILLAN BLOEDEL LIMITED ,  TAN, Zheng ,  SOLINAS, Marco

IPC: D21C09/153

CPC classification number: D21C9/1036 ,  D21C9/153

Abstract: Cellulosic pulps are bleached with ozone in an ozone bleaching stage in an aqueous medium containing an additive in an effective amount not exceeding 5 % weight concentration of the aqueous medium. The additive is selected from a group consisting of N-alkylated ureas, N-alkylated lactams and N-alkylated amides. pH in the Z stage is operated under conventional ozone bleaching conditions, but preferably at high consistency and at low temperature, below 5 DEG C.

Abstract translation: 纤维素纸浆在臭氧漂白阶段中用臭氧漂白，在含有不超过5％重量浓度的水介质的有效量的添加剂的水性介质中。 添加剂选自N-烷基化脲，N-烷基化内酰胺和N-烷基化酰胺。 Z级中的pH在常规臭氧漂白条件下操作，但优选在高稠度和低于5℃的低温下操作。

公开(公告)号：WO1995033884A1

公开(公告)日：1995-12-14

申请号：PCT/CA1995000311

申请日：1995-05-26

Applicant: MACMILLAN BLOEDEL LIMITED

Inventor： MACMILLAN BLOEDEL LIMITED ,  SOLINAS, Marco ,  CHAN, Victor ,  MURPHY, Thomas, Howard ,  TAN, Zheng

IPC: D21C09/153

CPC classification number: D21C9/1036 ,  D21C9/153

Abstract: Brown stock is ozone bleached in aqueous medium containing between 3 and 7 % based on the weight of the medium of a protector selected from the group comprising polyhydric alcohols, water soluble ethers of said polyhydric alcohols and mixtures thereof, and the medium, after bleaching, is separated from the bleached pulp and preferably delivered to the pulp mill recovery system.

Abstract translation: 基于选自包含多元醇的组合物的保护剂的介质的重量，含水介质中含有棕色原料的臭氧漂白剂，所述多元醇的水溶性醚及其混合物，以及所述介质在漂白后， 与漂白的纸浆分离，并优选输送到纸浆厂回收系统。

公开(公告)号：WO1995030047A1

公开(公告)日：1995-11-09

申请号：PCT/CA1995000194

申请日：1995-04-11

Applicant: MacMILLAN BLOEDEL LIMITED

Inventor： MacMILLAN BLOEDEL LIMITED ,  SOLINAS, Marco ,  PROUST, Allan, Maurice

IPC: D21C09/10

CPC classification number: D21C9/147 ,  D21C9/101

Abstract: An improved oxygen bleaching process wherein the pulp is bleached in an aqueous organic medium wherein a polyhydric alcohol constitutes between 10 an 70 % by weight of the medium to produce a pulp having a viscosity at least 2.5 cp higher than a similar pulp bleached using the same conditions in an aqueous atmosphere to the same kappa no. of 8 ml.

Abstract translation: 一种改进的氧气漂白方法，其中纸浆在含水有机介质中漂白，其中多元醇构成介质的10至70重量％，以产生粘度比使用该纸浆漂白的类似纸浆高至少2.5厘泊的纸浆 在含水气氛中的条件与相同的卡帕值相同。 8毫升。