ATE23376T1 - PROCESS FOR BLEACHING PAPER RAW MATERIALS. - Google Patents

PROCESS FOR BLEACHING PAPER RAW MATERIALS.

Info

Publication number
ATE23376T1
ATE23376T1 AT83112505T AT83112505T ATE23376T1 AT E23376 T1 ATE23376 T1 AT E23376T1 AT 83112505 T AT83112505 T AT 83112505T AT 83112505 T AT83112505 T AT 83112505T AT E23376 T1 ATE23376 T1 AT E23376T1
Authority
AT
Austria
Prior art keywords
raw materials
paper raw
bleaching
bleaching paper
termination
Prior art date
Application number
AT83112505T
Other languages
German (de)
Inventor
Hans-Ulrich Dr Suess
Horst Dr Krueger
Original Assignee
Degussa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Degussa filed Critical Degussa
Application granted granted Critical
Publication of ATE23376T1 publication Critical patent/ATE23376T1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)

Abstract

1. A process for the bleaching of raw paper materials with formamidine sulphinic acid at a temperature of from 50 to 130 degrees C, a pulp density of from 2 to 20 % by weight and a residence time of from 1 to 120 minutes in an alkaline aqueous sludge, characterized in that the pH lies between 9.7 and 12 at the beginning of the bleaching reaction and between 7 and < 9 after termination.
AT83112505T 1983-03-19 1983-12-13 PROCESS FOR BLEACHING PAPER RAW MATERIALS. ATE23376T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3309956A DE3309956C1 (en) 1983-03-19 1983-03-19 Process for bleaching paper raw materials
EP83112505A EP0120132B1 (en) 1983-03-19 1983-12-13 Process for bleaching raw paper materials

Publications (1)

Publication Number Publication Date
ATE23376T1 true ATE23376T1 (en) 1986-11-15

Family

ID=6194000

Family Applications (1)

Application Number Title Priority Date Filing Date
AT83112505T ATE23376T1 (en) 1983-03-19 1983-12-13 PROCESS FOR BLEACHING PAPER RAW MATERIALS.

Country Status (3)

Country Link
EP (1) EP0120132B1 (en)
AT (1) ATE23376T1 (en)
DE (2) DE3309956C1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616816A1 (en) * 1986-05-17 1987-11-19 Degussa METHOD FOR REMOVING BULK COLORED PAPER AND SELF-COPYING PAPER
DE3831668A1 (en) * 1988-09-17 1990-03-22 Escher Wyss Gmbh METHOD FOR INCREASING WHITE GRADE OF WASTE PAPER WITH NEUTRAL WATER CIRCUIT
DE3902423A1 (en) * 1989-01-27 1990-08-02 Degussa METHOD FOR BLEACHING FIBER FABRICS FOR PAPER PRODUCTION
GB9214041D0 (en) * 1992-07-02 1992-08-12 Morton Int Inc Process for de-inking recycled paper pulp
AT407762B (en) * 1994-03-22 2001-06-25 Brueggemann L Kg Bleaching agent for bleaching secondary fibrous materials for papermaking
DE19920338A1 (en) * 1999-05-03 2000-11-16 Voith Sulzer Papiertech Patent Bleaching control of a paper fiber pulp suspension uses measurements before and after bleaching with intermediate measurements to control the bleaching stage for optimum whiteness and max use of the bleaching chemicals
DE102007007654A1 (en) * 2007-02-13 2008-08-14 Voith Patent Gmbh FAS bleach
US10974348B2 (en) 2016-06-02 2021-04-13 Priefert Mfg. Co, Inc. Method for forming a brazed joint
DE102020111675A1 (en) * 2020-04-29 2021-11-04 Kübler & Niethammer Papierfabrik Kriebstein AG Process for producing a label paper from detached wet labels

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384534A (en) * 1964-12-16 1968-05-21 Fmc Corp Bleaching of wood pulps with thiourea dioxide
GB1404315A (en) * 1971-09-15 1975-08-28 Albright & Wilson Production of bleached high yield pulp
DE3118192A1 (en) * 1981-05-08 1982-11-25 Basf Ag, 6700 Ludwigshafen Process for de-inking waste paper

Also Published As

Publication number Publication date
DE3309956C1 (en) 1984-07-12
EP0120132A1 (en) 1984-10-03
EP0120132B1 (en) 1986-11-05
DE3367421D1 (en) 1986-12-11

Similar Documents

Publication Publication Date Title
DE3267856D1 (en) Method of producing alkali-soluble cellulose carbamate
ATE86318T1 (en) PROCESS FOR THE PRODUCTION OF PULP FROM RAW MATERIALS CONTAINING LIGNIN.
DE3772247D1 (en) DIACETYL RHINE ACID POTASSIUM SALTS AND ITS USE FOR TREATING ARTHRITIS.
ATE68023T1 (en) METHOD OF BLEACHING MATERIAL WITH DITHIONITE SOLUTION.
ATE23376T1 (en) PROCESS FOR BLEACHING PAPER RAW MATERIALS.
EP0124755A3 (en) Process for the manufacture of 2-cyanoacrylates from 2,4-dicyanoglutarates
ES8107348A1 (en) Process for regenerating waste paper.
ATE30049T1 (en) PROCESS FOR THE PRODUCTION OF D-LACTIC ACID USING LACTOBACILLUS BULGARICUS DSM 2129.
IN164451B (en)
GB2074993B (en) Process for producing aqueous solution of calcium nitrite
IN154599B (en)
ES8802335A1 (en) Process for improving the mechanical properties of a chemical or semi-chemical bagasse paper pulp.
ZA812762B (en) Process for treating an alkaline solution of salts of anthraquinonedisuphonic acid
ES8307841A1 (en) Method of Improving Wet Tensile Strength of Paper
PT83117A (en) PROCESS FOR DELIGNIFICATION OF CELLULOSIC MATERIALS
ATE17116T1 (en) SELECTIVE ACYLATION OF HYDROXY-AMINOARYLSULFONS|URE.
ES8304889A1 (en) Process for the regeneration of condensate from urea production plants.
DE3163118D1 (en) Production of hydrazobenzene-3,3&#39;-disulphonic acid
DE3160107D1 (en) Process for the preparation of 1-naphthylamine-4,6-disulfonic acid and 1-naphthylamine-2,4,6-trisulfonic acid
DE3465071D1 (en) Process for the preparation of especially pharmacologically active compounds containing a sulfoxide group
PT83118A (en) PROCESS FOR DELIGNIFICATION OF CELLULOSIC MATERIALS
HUT34960A (en) Process for production of 5,5-bis /2-metaxo-carbonile-amino-benzimidasole/ disulphide
FI854148L (en) FOERFARANDE FOER BEHANDLING AV PAPPERSMASSOR FOER BLEKNING AV DESAMMA.
ATE7838T1 (en) SHELF-STABLE, CONCENTRATED EMULSION OF HERBICIDAL PHENOXYALCANCARBONIC ACID ESTERS AND A PROCESS FOR THEIR PRODUCTION.
PL121063B2 (en) Process for acid and alkaline sewage treatment