公开(公告)号：AU3468797A

公开(公告)日：1998-01-21

申请号：AU3468797

申请日：1997-06-16

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： BOMAN ROLF ,  BOKSTROM MONICA ,  GERMGARD ULF ,  MELLANDER PIA ,  NORDEN SOLVEIG ,  SUNDIN MATTS

IPC: D21C9/10 ,  D21C9/14

公开(公告)号：SE9602602L

公开(公告)日：1997-12-29

申请号：SE9602602

申请日：1996-06-28

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： BOMAN ROLF ,  BOKSTROEM MONICA ,  NORDEN SOLVEIG ,  GEMGAARD ULF ,  MELLANDER PIA ,  SUNDIN MATTS

IPC: D21C9/10 ,  D21C9/14

公开(公告)号：BR9305761A

公开(公告)日：1997-01-28

申请号：BR9305761

申请日：1993-01-12

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： LINDSTROM LARS-AKE ,  SJODIN LARS ,  NORDEN SOLVEIG ,  DAHL MARTEN

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

公开(公告)号：SE504210C2

公开(公告)日：1996-12-09

申请号：SE9303037

申请日：1993-09-16

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： NORDEN SOLVEIG ,  DAHL MAARTEN ,  GERMGAARD ULF ,  LINDSTROEM LARS-AAKE ,  CARRE GUNNAR

IPC: D21C9/14

Abstract: Method for the multi-stage bleaching of paper pulp in which at least one end bleaching stage is carried out using chlorine dioxide at a pulp concn.of 10-15% for 1-90 mins. in a pressurised vessel at 90-130 deg C, 0.1-10 bar.

公开(公告)号：BR9406105A

公开(公告)日：1995-12-12

申请号：BR9406105

申请日：1994-02-17

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： GERMGARD ULF ,  NORDEN SOLVEIG

IPC: C02F1/64 ,  D21C9/10 ,  D21C11/00

公开(公告)号：ZA9305691B

公开(公告)日：1994-03-03

申请号：ZA9305691

申请日：1993-08-05

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： GERMGAARD ULF ,  NORDEN SOLVEIG

IPC: D21C20060101 ,  D21C9/10 ,  D21C9/153 ,  D21C9/16 ,  D21C11/00 ,  D21C

公开(公告)号：SE9301160L

公开(公告)日：1994-03-01

申请号：SE9301160

申请日：1993-04-07

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： GERMGAARD ULF ,  NORDEN SOLVEIG

IPC: C02F9/00 ,  D21C9/00 ,  D21C9/10 ,  D21C9/153 ,  D21C9/16 ,  D21C11/00

Abstract: Methods of treating process water containing metal ions is disclosed including contacting the process water with a pulp comprising lignocellulose-containing material at a pH of above about 7 and a temperature of from about 50 DEG to 120 DEG C. whereby at least a portion of the metal ions are removed from the process water. Preferably the process water is produced from initially washing a pulp solution prior to a bleaching step employing hydrogen peroxide or ozone.

公开(公告)号：CA2231048C

公开(公告)日：2007-11-20

申请号：CA2231048

申请日：1996-09-18

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： NORDEN SOLVEIG ,  MELLANDER PIA ,  BOKSTROM MONICA

IPC: D21C9/147 ,  D21C9/10

Abstract: A method of oxygen delignification of pulp from lignocellulosic material at medium concentration in two steps. An extended delignification is obtained in that the temperature in the first step is hel d below 90 .degree.C, that the difference in temperature between the steps is lower than 20 .degree.C. The pressure in the first step is 4-10 bar and i n the second step 2-5 bar, and the pressure in the first step is higher than in the second step. The oxygen addition to the first step is high, 25-50 kg/ton pulp, that alkali is added only to the first step for obtaining high alkalinity in the pulp, 25-50 kg alkali per ton pulp. The stay-time in the first step is 10-30 min and in the second step 45-180 min.

公开(公告)号：BR9306963A

公开(公告)日：1999-01-12

申请号：BR9306963

申请日：1993-08-11

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： NORDEN SOLVEIG ,  GERMGARD ULF

IPC: C02F9/00 ,  D21C9/00 ,  D21C9/10 ,  D21C9/153 ,  D21C9/16 ,  D21C11/00

Abstract: Methods of treating process water containing metal ions is disclosed including contacting the process water with a pulp comprising lignocellulose-containing material at a pH of above about 7 and a temperature of from about 50 DEG to 120 DEG C. whereby at least a portion of the metal ions are removed from the process water. Preferably the process water is produced from initially washing a pulp solution prior to a bleaching step employing hydrogen peroxide or ozone.

公开(公告)号：AU691132B2

公开(公告)日：1998-05-07

申请号：AU7348396

申请日：1996-09-18

Applicant: SUNDS DEFIBRATOR IND AB

Inventor： BOKSTROM MONICA ,  MELLANDER PIA ,  NORDEN SOLVEIG

IPC: D21C9/10 ,  D21C9/147

Abstract: Methods for oxygen delignification of a pulp are disclosed, including initially delignifying the pulp at a delignification temperature of less than 90° C., adding oxygen to the pulp so that the oxygen is present during the initial delignification step, and further delignifying the pulp at a delignification temperature of greater than 90° C., the difference between the two delignification temperatures being less than about 20° C., and the pressure being greater in the initial delignification step. The method also includes adding alkali solely to the initial delignification step in order to obtain high alkalinity therein.