公开(公告)号：US2461105A

公开(公告)日：1949-02-08

申请号：US72469646

申请日：1946-12-17

Applicant: RUDOLF BLOCH ,  KURT GOLDSCHMID ,  ISAAC SCHNERB ,  PAUL GOLDSCHMIDT

Inventor： RUDOLF BLOCH ,  KURT GOLDSCHMID ,  ISAAC SCHNERB ,  PAUL GOLDSCHMIDT

IPC: D06L3/06 ,  D21C9/10

CPC classification number: D21C9/1036 ,  D06L4/23

公开(公告)号：US2341846A

公开(公告)日：1944-02-15

申请号：US39951241

申请日：1941-06-24

Applicant: AMERICAN CYANAMID CO

Inventor： MEINCKE EDMUND R

IPC: C07C69/34 ,  D21C9/10 ,  D21H17/15

CPC classification number: D21C9/1036 ,  D21H5/1254 ,  D21H13/24 ,  D21H17/15 ,  Y10S516/06

公开(公告)号：US1828338A

公开(公告)日：1931-10-20

申请号：US35112729

申请日：1929-03-29

Applicant: JOHN NEUMANN

Inventor： JOHN NEUMANN

IPC: D21C9/10

CPC classification number: D21C9/1036

公开(公告)号：US1732511A

公开(公告)日：1929-10-22

申请号：US28578228

申请日：1928-06-15

Applicant: CHAMPION FIBRE COMPANY

Inventor： HELDER HORATIO A

IPC: D21C9/10

CPC classification number: D21C9/1036

公开(公告)号：US1247757A

公开(公告)日：1917-11-27

申请号：US14683017

申请日：1917-02-05

Applicant: WANTE LEON DE WOLF

Inventor： WANTE LEON DE WOLF

CPC classification number: D21C9/1036

公开(公告)号：US64058A

公开(公告)日：1867-04-23

申请号：US64058D

CPC classification number: D21C9/1036

公开(公告)号：US20230203751A1

公开(公告)日：2023-06-29

申请号：US17996473

申请日：2021-03-17

Applicant: Messer Austria GmbH

Inventor： Bernhard Thaller

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

CPC classification number: D21C9/147 ,  D21C9/1036 ,  D21C9/163 ,  D21C9/1057

Abstract: In a process/an apparatus for producing bleached cellulose in which a lignin- and cellulose-containing suspension is subjected to at least one process step for oxygen-assisted bleaching in a reactor, such as alkaline oxygen delignification, oxygen-enhanced extraction or oxygen-enhanced peroxide bleaching, the oxygen required for the oxygen-assisted bleaching is supplied to the reactor at least partially in the form of oxygen-containing nanobubbles. The small size and high stability of the nanobubbles allow uniform distribution of the oxygen in the suspension and a comparatively long exposure time. The efficiency of the bleaching is thus substantially increased.

公开(公告)号：US20190186075A1

公开(公告)日：2019-06-20

申请号：US16311213

申请日：2017-06-27

Applicant: KEMIRA OYJ

Inventor： Leif ROBERTSÉN ,  Veli-Matti VUORENPALO ,  Anna-Maija PERANDER ,  Pentti PEKONEN ,  Jonas KONN

IPC: D21C9/10 ,  D21C9/16

CPC classification number: D21C9/1036 ,  D21C9/163 ,  D21C9/166

Abstract: The present invention relates to a process for treating pulp comprising a step, wherein the pulp is treated with distilled percarboxylic acid, such as distilled per-carboxylic acid (dPAA), and peroxide, such as hydrogen peroxide.

公开(公告)号：US20180274172A1

公开(公告)日：2018-09-27

申请号：US15918725

申请日：2018-03-12

Applicant: INTERNATIONAL PAPER COMPANY

Inventor： PETER M. FROASS

IPC: D21H11/04 ,  D21C9/16 ,  D21C9/10

CPC classification number: D21H11/04 ,  D21C9/00 ,  D21C9/001 ,  D21C9/004 ,  D21C9/1036 ,  D21C9/14 ,  D21C9/16 ,  D21C9/163 ,  D21C11/08 ,  D21H11/20 ,  D21H21/14 ,  D21H21/32

Abstract: The present technology is directed to fluff pulps with improved odor control as well as methods of making such fluff pulps. A fluff pulp is provided that includes a bleached kraft fiber and a copper ion content from about 0.2 ppm to about 50 ppm by weight of the bleached kraft fiber. The bleached kraft fiber includes a length-weighted average fiber length of at least about 2 mm, a copper number of less than about 7, a carboxyl content of more than about 3.5 meq/100 grams; an ISO brightness of at least 80; and a viscosity from about 2 cps to about 9 cps.

公开(公告)号：US09777431B1

公开(公告)日：2017-10-03

申请号：US15587077

申请日：2017-05-04

Applicant: GuangXi Bossco Environmental Protection Technology Co., LTD

Inventor： Shuangfei Wang ,  Shuangxi Nie ,  Chengrong Qin ,  Xueping Song ,  Haichuan Zhang ,  Kun Zhang

IPC: D21C9/14 ,  D21C9/16 ,  D21C11/06

CPC classification number: D21C9/14 ,  D21C9/1036 ,  D21C9/16 ,  D21C9/166 ,  D21C11/06 ,  Y02P70/24

Abstract: An excess heat recovery apparatus and process for high temperature chlorine dioxide bleaching of pulp is provided. The pulp of the high temperature chlorine dioxide bleaching stage enters a tube-side of a chlorine dioxide preheater through a pipeline. The low-temperature chlorine dioxide in the storage tank enters a shell-side pipeline of the chlorine dioxide preheater. 0.5 mol/L of a stabilizer may be added during preheating to prevent ClO2 from decomposing during the heating process. Preheated chlorine dioxide is then moved into a pulp mixer and the pH is adjusted to 3.2-3.8. The mixed pulp is then moved into a high temperature chlorine dioxide bleaching tower for bleaching. The cooling pulp, now out of the preheater, is washed in an alkaline extraction stage. The waste water from the washing flows directly into an effluent treatment system and is recycled after treatment.