公开(公告)号：DE2908202A1

公开(公告)日：1980-10-30

申请号：DE2908202

申请日：1979-03-02

Applicant: DEGUSSA

Inventor： KUEHNER GERHARD DIPL CHEM DR ,  BERNDT WILHELM DR ,  ROTHBUEHR LOTHAR DR ,  WAGNER HANS DIPL CHEM DR

IPC: C04B14/02 ,  C09C1/00 ,  C09C1/56 ,  C09C1/58 ,  C09D17/00 ,  D21H21/28 ,  C04B31/28 ,  D21H3/82

Abstract: Beaded carbon black is disclosed with a water content of 30 to 80% by weight which are used for coloring of paper and concrete. The product has the advantage of dust-free handling and a higher jet black color compared to conventional carbon black powder.

公开(公告)号：CH459739A

公开(公告)日：1968-07-15

申请号：CH915065

申请日：1965-06-30

Applicant: DEGUSSA

Inventor： BERNDT WILHELM DR

IPC: D21C5/02

公开(公告)号：DE2964319D1

公开(公告)日：1983-01-20

申请号：DE2964319

申请日：1979-12-04

Applicant: DEGUSSA

Inventor： KRUGER HORST DR ,  BERNDT WILHELM DR ,  WINK JAKOB

IPC: D21C9/16

公开(公告)号：DE3061114D1

公开(公告)日：1982-12-23

申请号：DE3061114

申请日：1980-12-18

Applicant: DEGUSSA

Inventor： KRUGER HORST DR ,  BERNDT WILHELM DR ,  SUSS HANS ULRICH DR

IPC: D21C9/16

Abstract: Cellulose is bleached by means of an organic peracid in the acid region and subsequently by means of peroxide in the alkaline region. As peracid there is employed an acid which is produced from the corresponding carboxylic acid by reaction with hydrogen peroxide in the presence of a mineral acid. The peroxide bleaching step which follows the peracid bleaching step is carried out after there is added the necessary amount of aqueous alkali solution for carrying out the peroxide bleaching step of the pulp without intermediate washing of the cellulose. A further addition of peroxide is not carried out.

公开(公告)号：DE3019519B1

公开(公告)日：1981-02-12

申请号：DE3019519

申请日：1980-05-22

Applicant: DEGUSSA

Inventor： BERNDT WILHELM DR ,  JUNKERMANN HELMUT DIPL-CHEM DR ,  KRUEGER HORST DIPL-CHEM DR

IPC: D21C9/08 ,  D21C9/00 ,  D21C9/16 ,  D21H5/00 ,  H01B3/52

公开(公告)号：DE2905936B1

公开(公告)日：1980-04-30

申请号：DE2905936

申请日：1979-02-16

Applicant: DEGUSSA

Inventor： KRUEGER HORST DR ,  BERNDT WILHELM DR ,  WINK JAKOB

IPC: D21C9/16 ,  D21C11/08

公开(公告)号：DE2928652A1

公开(公告)日：1981-02-19

申请号：DE2928652

申请日：1979-07-16

Applicant: DEGUSSA

Inventor： BERNDT WILHELM DR ,  JUNKERMANN HELMUT DIPL CHEM DR ,  KRUEGER HORST DIPL CHEM DR ,  HAFNER VOLKER ,  WINK JAKOB

IPC: D21C11/08

公开(公告)号：DE3005947B1

公开(公告)日：1981-01-29

申请号：DE3005947

申请日：1980-02-16

Applicant: DEGUSSA

Inventor： KRUEGER HORST DR ,  BERNDT WILHELM DR ,  ULRICH DR SUESS HANS

IPC: D21C9/16

Abstract: Cellulose is bleached by means of an organic peracid in the acid region and subsequently by means of peroxide in the alkaline region. As peracid there is employed an acid which is produced from the corresponding carboxylic acid by reaction with hydrogen peroxide in the presence of a mineral acid. The peroxide bleaching step which follows the peracid bleaching step is carried out after there is added the necessary amount of aqueous alkali solution for carrying out the peroxide bleaching step of the pulp without intermediate washing of the cellulose. A further addition of peroxide is not carried out.

公开(公告)号：DE2721402A1

公开(公告)日：1978-11-16

申请号：DE2721402

申请日：1977-05-12

Applicant: DEGUSSA

Inventor： BERNDT WILHELM DR ,  WINK JAKOB

IPC: D21C9/10

公开(公告)号：DE2311674A1

公开(公告)日：1974-09-12

申请号：DE2311674

申请日：1973-03-09

Applicant: DEGUSSA

Inventor： BERNDT WILHELM DR

IPC: D21C5/02