CA1322827C - Process and equipment for pretreatment of cellulosic raw-material - Google Patents

Process and equipment for pretreatment of cellulosic raw-material

Info

Publication number: CA1322827C
Authority: CA; Canada
Prior art keywords: solution; penetration; chips; vacuum; raw
Prior art date: 1988-02-08
Legal status (The legal status 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 status listed.): Expired - Fee Related

Application number

CA 590344

Other languages

English (en)

French (fr)

Inventor

Osmo Aho

Antti Aho

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee

Individual

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.)

1988-02-08

Filing date

1989-02-07

Publication date

1993-10-12

1989-02-07 Application filed by Individual filed Critical Individual

1993-10-12 Application granted granted Critical

1993-10-12 Publication of CA1322827C publication Critical patent/CA1322827C/en

2010-10-12 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

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
- D21C1/10—Physical methods for facilitating impregnation

Landscapes

Paper (AREA)
Chemical And Physical Treatments For Wood And The Like (AREA)
Chemical Or Physical Treatment Of Fibers (AREA)
Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

CA 590344 1988-02-08 1989-02-07 Process and equipment for pretreatment of cellulosic raw-material Expired - Fee Related CA1322827C (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FI880560A FI80083C (fi)	1988-02-08	1988-02-08	Foerfarande och anordning foer foerbehandling av cellulosahaltigt raoaemne.
FI880560		1988-02-08

Publications (1)

Publication Number	Publication Date
CA1322827C true CA1322827C (en)	1993-10-12

Family

ID=8525866

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA 590344 Expired - Fee Related CA1322827C (en)	1988-02-08	1989-02-07	Process and equipment for pretreatment of cellulosic raw-material

Country Status (6)

Country	Link
CA (1)	CA1322827C (fi)
DE (1)	DE3990074C2 (fi)
FI (1)	FI80083C (fi)
FR (1)	FR2650604B1 (fi)
SE (1)	SE507694C2 (fi)
WO (1)	WO1989007170A1 (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FI80083C (fi) *	1988-02-08	1990-04-10	Antti Aho	Foerfarande och anordning foer foerbehandling av cellulosahaltigt raoaemne.
FI910577A (fi) *	1991-02-06	1992-08-07	Antti Aho	Reglering av en process.
FI934281A0 (fi) *	1993-09-29	1993-09-29	Antti Aho	Foerbehandling av flis

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3076501A (en) *	1956-11-08	1963-02-05	Escher Wyss Ag	Apparatus for treating fibrous materials in the production of cellulose or semi-cellulose
DE1070013B (de) *	1957-07-10	1959-11-26	Escher Wyss G.m.b.H., Ravensburg	Verfahren und Einrichtung zur Behandlung faserhaltiger Stoffe bei der Erzeugung von Zellstoff oder Halbzellstoff
US3215587A (en) *	1963-01-21	1965-11-02	Lummus Co	Continuous process and apparatus for delignification of cellulosic material
US3347741A (en) *	1964-01-13	1967-10-17	Crane Co	Feeder for solid materials
US3446701A (en) *	1967-12-28	1969-05-27	Us Agriculture	Apparatus for impregnating and chemically converting cellulose-containing materials
FI80083C (fi) *	1988-02-08	1990-04-10	Antti Aho	Foerfarande och anordning foer foerbehandling av cellulosahaltigt raoaemne.

1988
- 1988-02-08 FI FI880560A patent/FI80083C/fi not_active IP Right Cessation
1989
- 1989-01-30 WO PCT/FI1989/000017 patent/WO1989007170A1/en active Application Filing
- 1989-01-30 DE DE3990074A patent/DE3990074C2/de not_active Expired - Fee Related
- 1989-02-07 CA CA 590344 patent/CA1322827C/en not_active Expired - Fee Related
- 1989-08-04 FR FR8910541A patent/FR2650604B1/fr not_active Expired - Fee Related
1990
- 1990-08-08 SE SE9002601A patent/SE507694C2/sv not_active IP Right Cessation

Also Published As

Publication number	Publication date
FI80083C (fi)	1990-04-10
SE9002601D0 (sv)	1990-08-08
FI880560A0 (fi)	1988-02-08
FI80083B (fi)	1989-12-29
WO1989007170A1 (en)	1989-08-10
FR2650604B1 (fr)	1995-02-10
FI880560A (fi)	1989-08-09
DE3990074C2 (de)	2000-03-16
SE507694C2 (sv)	1998-07-06
FR2650604A1 (fr)	1991-02-08
SE9002601L (sv)	1990-08-08

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Legal Events

Date	Code	Title	Description
2006-10-12	MKLA	Lapsed