BR8906570A - Processo para deslignificar e branquear polpa lignocelulosica - Google Patents

Processo para deslignificar e branquear polpa lignocelulosica

Info

Publication number: BR8906570A
Authority: BR; Brazil
Prior art keywords: designify; whiten; lignocellulosic pulp; lignocellulosic; pulp
Prior art date: 1988-12-20

Application number

BR898906570A

Other languages

English (en)

Inventor

Madhusudan Dattatraya Jayawant

Rupert D Souza

Jeffrey Shaocheng Hsieh

Original Assignee

Du Pont

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.)

1988-12-20

Filing date

1989-12-19

Publication date

1990-09-04

1989-12-19 Application filed by Du Pont filed Critical Du Pont

1990-09-04 Publication of BR8906570A publication Critical patent/BR8906570A/pt

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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds

BR898906570A 1988-12-20 1989-12-19 Processo para deslignificar e branquear polpa lignocelulosica BR8906570A (pt)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US28678288A	1988-12-20	1988-12-20

Publications (1)

Publication Number	Publication Date
BR8906570A true BR8906570A (pt)	1990-09-04

Family

ID=23100136

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BR898906570A BR8906570A (pt)	1988-12-20	1989-12-19	Processo para deslignificar e branquear polpa lignocelulosica

Country Status (9)

Country	Link
EP (1)	EP0377981A3 (pt)
JP (1)	JPH02216290A (pt)
AU (1)	AU4699989A (pt)
BR (1)	BR8906570A (pt)
CA (1)	CA2005369A1 (pt)
DK (1)	DK648589A (pt)
FI (1)	FI896085A7 (pt)
NO (1)	NO895108L (pt)
ZA (1)	ZA899775B (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE1006056A3 (fr) *	1992-07-06	1994-05-03	Solvay Interox	Procede pour le blanchiment d'une pate a papier chimique.
WO2021209586A1 (en) *	2020-04-16	2021-10-21	Bim Kemi Ab	Delignification process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
SE434283B (sv) *	1982-12-01	1984-07-16	Mo Och Domsjoe Ab	Forfarande for delignifiering av cellulosamassa med kveveoxider och syrgas

1989
- 1989-12-13 CA CA002005369A patent/CA2005369A1/en not_active Abandoned
- 1989-12-18 EP EP19890313196 patent/EP0377981A3/en not_active Withdrawn
- 1989-12-19 FI FI896085A patent/FI896085A7/fi not_active Application Discontinuation
- 1989-12-19 NO NO89895108A patent/NO895108L/no unknown
- 1989-12-19 DK DK648589A patent/DK648589A/da not_active Application Discontinuation
- 1989-12-19 BR BR898906570A patent/BR8906570A/pt not_active Application Discontinuation
- 1989-12-20 AU AU46999/89A patent/AU4699989A/en not_active Abandoned
- 1989-12-20 ZA ZA899775A patent/ZA899775B/xx unknown
- 1989-12-20 JP JP1328534A patent/JPH02216290A/ja active Pending

Also Published As

Publication number	Publication date
EP0377981A3 (en)	1992-06-24
NO895108L (no)	1990-06-21
NO895108D0 (no)	1989-12-19
DK648589D0 (da)	1989-12-19
FI896085A0 (fi)	1989-12-19
ZA899775B (en)	1991-08-28
CA2005369A1 (en)	1990-06-20
FI896085A7 (fi)	1990-06-21
DK648589A (da)	1990-06-21
JPH02216290A (ja)	1990-08-29
EP0377981A2 (en)	1990-07-18
AU4699989A (en)	1990-06-28

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Legal Events

Date	Code	Title	Description
1995-09-05	FD3	Appl. lapsed due to non-payment of renewal fee