公开(公告)号：US5529662A

公开(公告)日：1996-06-25

申请号：US267947

申请日：1994-07-06

Applicant: Zheng Tan ,  Marco Solinas

Inventor： Zheng Tan ,  Marco Solinas

IPC: D21C9/10 ,  D21C9/153

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.degree. C.

Abstract translation: 纤维素纸浆在臭氧漂白阶段用含有有效量不超过5％重量浓度的添加剂的水性介质中的臭氧漂白。 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阶段的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。

公开(公告)号：US5366593A

公开(公告)日：1994-11-22

申请号：US927164

申请日：1992-08-11

Applicant: Chung-Li Lee ,  Robert W. Murray ,  Kenneth Hunt ,  James T. Wearing ,  Robert M. Hogikyan ,  Colin W. Oloman ,  Jianxin Chen

Inventor： Chung-Li Lee ,  Robert W. Murray ,  Kenneth Hunt ,  James T. Wearing ,  Robert M. Hogikyan ,  Colin W. Oloman ,  Jianxin Chen

IPC: D21C9/10 ,  D21C9/16 ,  D21C3/20

CPC classification number: D21C9/16 ,  D21C9/1036 ,  D21C9/166

Abstract: A chemical pulp which contains reactants capable of generating dioxirane within the pulp is produced in a process which comprises mixing a pulp with reactants comprising a carbonyl compound, preferably acetone, and an oxygen donor, preferably monoperoxysulfate, in proportions which produce a water-soluble dioxirane having a molecular diameter of less than 140 angstrom units. Such a pulp bleaching process which employs dioxirane as a bleaching agent is rendered environmentally and economically acceptable by recycling the reactants employed to produce the dioxirane.

Abstract translation: 在包括将纸浆与包含羰基化合物（优选丙酮）和氧供体（优选单过氧硫酸盐）的反应物混合的方法中，产生水溶性二氧杂环烷的比例产生包含能够在纸浆内产生二环氧乙烷的化学纸浆 分子直径小于140埃。 使用二氧杂环烷作为漂白剂的这种纸浆漂白方法通过再循环用于生产二氧环烷的反应物而使环境和经济上可接受。

公开(公告)号：US5364503A

公开(公告)日：1994-11-15

申请号：US838169

申请日：1992-02-20

Applicant: Marco Solinas ,  Thomas H. Murphy

Inventor： Marco Solinas ,  Thomas H. Murphy

IPC: D21C9/10 ,  D21C9/153

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 oxide (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来漂白化学纸浆的方法，螯合纸浆，然后在氮气阶段用氮氧化物（NO）处理纸浆，其量为烘箱的至少1.5重量％ 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：US5266158A

公开(公告)日：1993-11-30

申请号：US848065

申请日：1992-03-09

Applicant: Roy T. Hill ,  Patricia B. Walsh

Inventor： Roy T. Hill ,  Patricia B. Walsh

IPC: D21C5/02 ,  D21C9/10 ,  D21C9/16

CPC classification number: D21C5/022 ,  D21C9/1036 ,  D21C9/16 ,  Y02W30/648

Abstract: Process for color stripping and bleaching of colored waste paper by treatment by means of monoperoxysulphuric acid or of one of its salts, according to which the treatment is performed in the presence of a halide ion.

Abstract translation: 通过使用单过硫酸或其盐之一进行处理来着色废纸的脱色和漂白的方法，根据该方法，在卤化物离子存在下进行处理。

公开(公告)号：US5248389A

公开(公告)日：1993-09-28

申请号：US912429

申请日：1992-07-13

Applicant: Stanley A. Heimburger ,  Steve E. Tremblay ,  Tommy Y. Meng

Inventor： Stanley A. Heimburger ,  Steve E. Tremblay ,  Tommy Y. Meng

IPC: D21C9/10 ,  D21C9/16

CPC classification number: D21C9/163 ,  D21C9/1036

Abstract: A process is provided for peroxygen bleaching of high yield pulp in which sodium carbonate replaces sodium hydroxide and sodium silicate. The process employs a chelating agent as a substitute for the silicate normally required so that the process can operate as a closed cycle system.

Abstract translation: 提供了用于过氧漂白高产量纸浆的方法，其中碳酸钠替代氢氧化钠和硅酸钠。 该方法使用螯合剂作为通常所需的硅酸盐的替代物，使得该方法可以作为封闭循环系统操作。

公开(公告)号：US5091054A

公开(公告)日：1992-02-25

申请号：US395520

申请日：1989-08-18

Applicant: Juergen Meier ,  Gerhard Arnold

Inventor： Juergen Meier ,  Gerhard Arnold

IPC: D21C9/10 ,  D21C9/147 ,  D21C9/16

CPC classification number: D21C9/147 ,  D21C9/1036 ,  D21C9/163

Abstract: Delignification and bleaching of lignocellulosic material is enhanced after the pulp has been treated with peroxomonosulfuric acid. The starting pH of the reaction with peroxomonosulfuric acid is between 7 and 11, and the reaction is continued until a final pH of 3 to 5 obtained. Subsequently the pulp is delignified and bleached with peroxide and/or oxygen.

Abstract translation: 木浆纤维素材料的脱木质素和漂白剂在用次氯酸后处理得到提高。 与二氧代硫酸反应的起始pH为7-11，反应持续到最终pH为3〜5。 随后，纸浆被过氧化物和/或氧气脱木质素和漂白剂。

公开(公告)号：US5034096A

公开(公告)日：1991-07-23

申请号：US939562

申请日：1986-12-09

Applicant: Benedikt Hammer ,  Horst Michaud ,  Stefan Weiss

Inventor： Benedikt Hammer ,  Horst Michaud ,  Stefan Weiss

IPC: D21C9/147 ,  D21C9/10 ,  D21C9/153 ,  D21C9/16

CPC classification number: D21C9/1036

Abstract: The present invention provides a process for bleaching and delignifying cellulose-containing products with peroxides and/or oxygen and/or ozone, wherein there is additionally used 0.01 to 2.5% by weight of cyanamide and/or cyanamide salts, referred to the dry weight of the cellulose.

Abstract translation: 本发明提供了一种用过氧化物和/或氧和/或臭氧漂白和脱木质纤维素产品的方法，其中另外使用0.01至2.5重量％的氨基氰和/或氰胺盐，以干重计 纤维素。

公开(公告)号：US3736224A

公开(公告)日：1973-05-29

申请号：US3736224D

申请日：1971-06-16

Applicant: AMERICAN CYANAMID CO

Inventor： GRAYSON M ,  FARLEY C

IPC: D21C9/10

CPC classification number: D21C9/1036

Abstract: A METHOD FOR THE DELIGNIFICATION AND BLEACHING OF LIGNOCELLULOSIC MATERIALS UNDER THE ACTION OF OXYGEN AND ALKALI IN AN ALKALINE MEDIUM AND IN THE PRESENCE OF FROM ABOUT 0.005% TO ABOUT 5.0%, BY WEIGHT, BASED ON THE WEIGHT OF SAID MATERIAL, OF A COPPER-CONTAINING MATERIAL WHICH CONVERTS, AT LEAST IN PART, TO COPPER OXIDE IN THE PRESENCE OF SAID ALKALI IN SAID ALKALINE MEDIUM.

公开(公告)号：US3716448A

公开(公告)日：1973-02-13

申请号：US3716448D

申请日：1970-05-25

Applicant: INT PAPER CO

Inventor： ROYMOULIK S

IPC: D06M11/79 ,  D21C9/10

CPC classification number: D21C9/1036 ,  D06M11/79

Abstract: Delignification and bleaching of chemical pulp is achieved by treating the pulp in a single stage with oxygen at elevated temperature and pressure in the presence of a protector selected from the group consisting of Na2S2O4 and Na2Sx, where x is an integer from 1 to 4.

Abstract translation: 化学纸浆的脱木质素和漂白是通过在选自Na 2 S 2 O 4和Na 2 S x的保护剂存在下，在升高的温度和压力下用氧处理单阶段的纸浆来实现的，其中x是1至4的整数。

公开(公告)号：US3284283A

公开(公告)日：1966-11-08

申请号：US34511964

申请日：1964-02-17

Applicant: FMC CORP

Inventor： KINDRON ROBERT R ,  CARTSUNIS LOUIS P

IPC: D21B1/16 ,  D21C9/10

CPC classification number: D21B1/16 ,  D21C9/1036 ,  D21C9/1047 ,  D21C9/1084