FI62869C - Foerfarande i flera steg foer klorfattig helblekning av cellulosa - Google Patents

Foerfarande i flera steg foer klorfattig helblekning av cellulosa Download PDF

Info

Publication number: FI62869C
Authority: FI; Finland
Prior art keywords: bleaching; pulp; helblekning; cellulosa; peroxide
Prior art date: 1975-08-30

Application number

FI753314A

Other languages

English (en)

Finnish (fi)

Other versions

FI753314A (xx

FI62869B (fi

Inventor

Horst Krueger

Werner Traser

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.)

1975-08-30

Filing date

1975-11-25

Publication date

1983-03-10

1975-11-25 Application filed by Degussa filed Critical Degussa

1977-03-01 Publication of FI753314A publication Critical patent/FI753314A/fi

1982-11-30 Application granted granted Critical

1982-11-30 Publication of FI62869B publication Critical patent/FI62869B/fi

1983-03-10 Publication of FI62869C publication Critical patent/FI62869C/fi

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)
Cosmetics (AREA)

FI753314A 1975-08-30 1975-11-25 Foerfarande i flera steg foer klorfattig helblekning av cellulosa FI62869C (fi)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE2538673		1975-08-30
DE2538673A DE2538673C2 (de)	1975-08-30	1975-08-30	Bleichaufschluß von Zellstoff mit erheblich reduziertem Chloreinsatz

Publications (3)

Publication Number	Publication Date
FI753314A FI753314A (xx)	1977-03-01
FI62869B FI62869B (fi)	1982-11-30
FI62869C true FI62869C (fi)	1983-03-10

Family

ID=5955230

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FI753314A FI62869C (fi)	1975-08-30	1975-11-25	Foerfarande i flera steg foer klorfattig helblekning av cellulosa

Country Status (17)

Country	Link
AR (1)	AR221678A1 (xx)
AT (1)	AT340765B (xx)
BE (1)	BE836462R (xx)
BR (1)	BR7603006A (xx)
CA (1)	CA1080406A (xx)
CH (1)	CH620002A5 (xx)
DE (1)	DE2538673C2 (xx)
ES (1)	ES443318A1 (xx)
FI (1)	FI62869C (xx)
FR (1)	FR2322235A1 (xx)
GB (1)	GB1544216A (xx)
IT (1)	IT1055792B (xx)
NL (1)	NL7513942A (xx)
NO (1)	NO145344B (xx)
SE (1)	SE7602842L (xx)
YU (1)	YU37370B (xx)
ZA (1)	ZA757822B (xx)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2416297A1 (fr) *	1978-01-31	1979-08-31	Europeen Cellulose	Procede anti-polluant de blanchiment de pate a papier
FR2432574A1 (fr) *	1978-08-01	1980-02-29	Europeen Cellulose	Procede de blanchiment de pate a papier
FR2572431B1 (fr) *	1984-10-25	1987-12-04	Centre Tech Ind Papier	Procede pour la preparation des pates papetieres chimiques en vue du blanchiment.
ES2038097T5 (es) *	1989-06-06	2001-05-01	Eka Chemicals Ab	Procedimiento para blanquear pastas papeleras que contienen lignocelulosa.
SE9001481L (sv) *	1990-04-23	1991-10-24	Eka Nobel Ab	Reduktion av halogenorganiska foereningar i blekeriavlopp
SE466061B (sv) *	1990-04-23	1991-12-09	Eka Nobel Ab	Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE753531C (de) *	1938-11-09	1953-05-18	Degussa	Verfahren zum Bleichen von Zellstoff
DE2327900C3 (de) *	1973-06-01	1985-02-07	Degussa Ag, 6000 Frankfurt	Bleichaufschluß von Zellstoff mit erheblich reduziertem Chloreinsatz

1975
- 1975-08-30 DE DE2538673A patent/DE2538673C2/de not_active Expired
- 1975-11-12 AT AT861075A patent/AT340765B/de not_active IP Right Cessation
- 1975-11-25 FI FI753314A patent/FI62869C/fi not_active IP Right Cessation
- 1975-11-28 YU YU3012/75A patent/YU37370B/xx unknown
- 1975-11-28 NL NL7513942A patent/NL7513942A/xx not_active Application Discontinuation
- 1975-12-03 NO NO754077A patent/NO145344B/no unknown
- 1975-12-09 BE BE6045289A patent/BE836462R/xx not_active IP Right Cessation
- 1975-12-09 ES ES443318A patent/ES443318A1/es not_active Expired
- 1975-12-15 ZA ZA757822A patent/ZA757822B/xx unknown
1976
- 1976-01-05 AR AR261846A patent/AR221678A1/es active
- 1976-01-14 IT IT67078/76A patent/IT1055792B/it active
- 1976-02-05 CA CA245,088A patent/CA1080406A/en not_active Expired
- 1976-02-25 FR FR7605307A patent/FR2322235A1/fr active Granted
- 1976-02-27 SE SE7602842A patent/SE7602842L/ unknown
- 1976-04-22 GB GB16311/76A patent/GB1544216A/en not_active Expired
- 1976-05-13 BR BR7603006A patent/BR7603006A/pt unknown
- 1976-08-26 CH CH1084076A patent/CH620002A5/de not_active IP Right Cessation

Also Published As

Publication number	Publication date
BE836462R (fr)	1976-06-09
DE2538673C2 (de)	1986-01-16
ES443318A1 (es)	1977-05-01
DE2538673A1 (de)	1977-03-03
FI753314A (xx)	1977-03-01
NL7513942A (nl)	1977-03-02
SE7602842L (sv)	1977-03-01
AT340765B (de)	1978-01-10
CA1080406A (en)	1980-07-01
YU301275A (en)	1983-04-27
GB1544216A (en)	1979-04-19
IT1055792B (it)	1982-01-11
FR2322235A1 (fr)	1977-03-25
CH620002A5 (en)	1980-10-31
FR2322235B1 (xx)	1979-04-06
NO754077L (xx)	1977-03-01
ZA757822B (en)	1976-11-24
NO145344B (no)	1981-11-23
AR221678A1 (es)	1981-03-13
BR7603006A (pt)	1977-05-31
YU37370B (en)	1984-08-31
FI62869B (fi)	1982-11-30
ATA861075A (de)	1977-04-15

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Legal Events

Date	Code	Title	Description
2004-08-31	MM	Patent lapsed	Owner name: DEGUSSA AKTIENGESELLSCHAFT