IT1119314B - CELLULOSE WHITENING PROCEDURE - Google Patents

CELLULOSE WHITENING PROCEDURE

Info

Publication number: IT1119314B
Authority: IT; Italy
Prior art keywords: cellulose; whitening procedure; whitening; procedure; cellulose whitening
Prior art date: 1978-09-21

Application number

IT68380/79A

Other languages

Italian (it)

Other versions

IT7968380A0 (en

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.)

1978-09-21

Filing date

1979-06-29

Publication date

1986-03-10

1979-06-29 Application filed by Degussa filed Critical Degussa

1979-06-29 Publication of IT7968380A0 publication Critical patent/IT7968380A0/en

1986-03-10 Application granted granted Critical

1986-03-10 Publication of IT1119314B publication Critical patent/IT1119314B/en

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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)
Detergent Compositions (AREA)
Polysaccharides And Polysaccharide Derivatives (AREA)

IT68380/79A 1978-09-21 1979-06-29 CELLULOSE WHITENING PROCEDURE IT1119314B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE2841013A DE2841013C2 (en)	1978-09-21	1978-09-21	Process for full bleaching of pulp

Publications (2)

Publication Number	Publication Date
IT7968380A0 IT7968380A0 (en)	1979-06-29
IT1119314B true IT1119314B (en)	1986-03-10

Family

ID=6049994

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT68380/79A IT1119314B (en)	1978-09-21	1979-06-29	CELLULOSE WHITENING PROCEDURE

Country Status (11)

Country	Link
AT (1)	AT372426B (en)
BE (1)	BE878841A (en)
BR (1)	BR7905860A (en)
CA (1)	CA1122358A (en)
CH (1)	CH641515A5 (en)
DE (1)	DE2841013C2 (en)
FI (1)	FI68681C (en)
FR (1)	FR2436846A1 (en)
IT (1)	IT1119314B (en)
NO (1)	NO153342C (en)
SE (1)	SE445366B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3937932A1 (en) *	1989-11-15	1991-05-16	Holtzmann & Cie Ag E	Delignification and bleaching of pulp with alkali chlorite - by adding chlorite before acidification to produce nascent reagent, minimising pollution
US5607546A (en) *	1990-02-13	1997-03-04	Molnlycke Ab	CTMP-process
SE466060C (en)	1990-02-13	1995-09-11	Moelnlycke Ab	Absorbent chemitermomechanical mass and preparation thereof
AU642971B2 (en) *	1990-02-19	1993-11-04	Paper Australia Pty Ltd	Bleaching of paper pulp
NZ237019A (en) *	1990-02-19	1992-11-25	Amcor Ltd	Bleaching paper pulp by initially treating with oxygen and/or hydrogen peroxide and subsequently treating with a bleaching agent without intervening washing steps
US6398908B1 (en)	1991-04-30	2002-06-04	Eka Nobel Ab	Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
SE500353C2 (en) *	1992-10-26	1994-06-06	Sca Wifsta Oestrand Ab	Peroxide bleaching of sulfate pulp with the addition of magnesium before bleaching
SE9203366L (en) *	1992-11-11	1994-05-12	Mo Och Domsjoe Ab	Process for delignification and / or bleaching of cellulose pulp
SE501325E (en) *	1993-01-29	1999-09-20	Kvaerner Pulping Tech	Process for chlorine-free bleaching of pulp, wherein the pulp is acidified with acetic acid in the treatment with complexing agents
SE502706E (en) *	1994-04-05	1999-09-27	Mo Och Domsjoe Ab	Preparation of bleached cellulose pulp by bleaching with chlorine dioxide and treatment of complexing agents in the same step

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE582239C (en) *	1929-03-16	1933-09-14	I G Farbenindustrie Akt Ges	Process for bleaching bast fibers, in particular linen and hemp, in the form of yarns and fabrics as well as in the form of raw fibers using superoxide and hypochlorite balls
FR1010501A (en) *	1948-08-31	1952-06-12	Papiers Abadie Sa Des	Cellulose pulp bleaching process
SE335053B (en) *	1969-05-13	1971-05-10	Mo Och Domsjoe Ab
DE2219504C2 (en) *	1972-04-21	1974-10-03	Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt	Multi-stage bleaching of cellulose with significantly reduced use of chlorine
DE2327900C3 (en) *	1973-06-01	1985-02-07	Degussa Ag, 6000 Frankfurt	Bleaching of cellulose with considerably reduced use of chlorine
DE2721402C2 (en) *	1977-05-12	1984-04-12	Degussa Ag, 6000 Frankfurt	Process for bleaching pulp

1978
- 1978-09-21 DE DE2841013A patent/DE2841013C2/en not_active Expired
1979
- 1979-06-20 NO NO792067A patent/NO153342C/en unknown
- 1979-06-29 IT IT68380/79A patent/IT1119314B/en active
- 1979-07-04 FI FI792115A patent/FI68681C/en not_active IP Right Cessation
- 1979-07-10 FR FR7917876A patent/FR2436846A1/en active Granted
- 1979-09-11 CA CA335,412A patent/CA1122358A/en not_active Expired
- 1979-09-13 BR BR7905860A patent/BR7905860A/en unknown
- 1979-09-17 BE BE6/46946A patent/BE878841A/en not_active IP Right Cessation
- 1979-09-20 CH CH849479A patent/CH641515A5/en not_active IP Right Cessation
- 1979-09-20 AT AT0620579A patent/AT372426B/en not_active IP Right Cessation
- 1979-09-21 SE SE7907850A patent/SE445366B/en not_active IP Right Cessation

Also Published As

Publication number	Publication date
NO153342C (en)	1986-02-26
SE7907850L (en)	1980-03-22
SE445366B (en)	1986-06-16
FR2436846A1 (en)	1980-04-18
IT7968380A0 (en)	1979-06-29
BE878841A (en)	1980-03-17
AT372426B (en)	1983-10-10
FI68681C (en)	1985-10-10
DE2841013A1 (en)	1980-04-03
BR7905860A (en)	1980-05-20
FR2436846B1 (en)	1982-08-27
FI792115A (en)	1980-03-22
FI68681B (en)	1985-06-28
CH641515A5 (en)	1984-02-29
ATA620579A (en)	1983-02-15
CA1122358A (en)	1982-04-27
NO153342B (en)	1985-11-18
NO792067L (en)	1980-03-24
DE2841013C2 (en)	1984-06-07

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