SE9002601L - CELLULOSARA MATERIAL PREPARATION - Google Patents

CELLULOSARA MATERIAL PREPARATION

Info

Publication number
SE9002601L
SE9002601L SE9002601A SE9002601A SE9002601L SE 9002601 L SE9002601 L SE 9002601L SE 9002601 A SE9002601 A SE 9002601A SE 9002601 A SE9002601 A SE 9002601A SE 9002601 L SE9002601 L SE 9002601L
Authority
SE
Sweden
Prior art keywords
solution
carried out
treatment
opening
atmospheric
Prior art date
Application number
SE9002601A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9002601D0 (en
SE507694C2 (en
Inventor
O Aho
Original Assignee
Osom Aho
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 Osom Aho filed Critical Osom Aho
Publication of SE9002601L publication Critical patent/SE9002601L/en
Publication of SE9002601D0 publication Critical patent/SE9002601D0/en
Publication of SE507694C2 publication Critical patent/SE507694C2/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
    • 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)

Abstract

The invention concerns a process and an equipment for pretreatment of cellulosic chip-formed raw-material by impregnation. In the process, first a vacuum treatment is carried out withou preceeding moistening treatment, and as soon as possible after the vacuum treatment penetration, is carried out with a solution of chemicals or with water at the atmospheric or a higher solution pressure. In this way the fiber cavities can be filled optimally, which promotes a uniform and adequate diffusion of the solution into the fiber walls significantly. The process can be carried out, e.g., in a device which comprises a tank for the treatment of the raw-material and therein a feed opening for the solution as well as an opening for removal of the rawmaterial, which opening communicates preferably with a reception tank, where the atmospheric or a higher pressure prevails.
SE9002601A 1988-02-08 1990-08-08 Process and apparatus for pre-treating chips using vacuum treatment SE507694C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI880560A FI80083C (en) 1988-02-08 1988-02-08 Method and apparatus for pre-treating cellulosic feedstock
PCT/FI1989/000017 WO1989007170A1 (en) 1988-02-08 1989-01-30 Process and equipment for pretreatment of cellulosic raw material

Publications (3)

Publication Number Publication Date
SE9002601L true SE9002601L (en) 1990-08-08
SE9002601D0 SE9002601D0 (en) 1990-08-08
SE507694C2 SE507694C2 (en) 1998-07-06

Family

ID=8525866

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9002601A SE507694C2 (en) 1988-02-08 1990-08-08 Process and apparatus for pre-treating chips using vacuum treatment

Country Status (6)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI80083C (en) * 1988-02-08 1990-04-10 Antti Aho Method and apparatus for pre-treating cellulosic feedstock
FI910577A (en) * 1991-02-06 1992-08-07 Antti Aho REGLERING AV EN PROCESS.
FI934281A0 (en) * 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 (en) * 1957-07-10 1959-11-26 Escher Wyss G.m.b.H., Ravensburg Method and device for the treatment of fibrous substances in the production of cellulose or semi-cellulose
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 (en) * 1988-02-08 1990-04-10 Antti Aho Method and apparatus for pre-treating cellulosic feedstock

Also Published As

Publication number Publication date
FI80083B (en) 1989-12-29
FI880560A (en) 1989-08-09
DE3990074C2 (en) 2000-03-16
SE9002601D0 (en) 1990-08-08
FI80083C (en) 1990-04-10
WO1989007170A1 (en) 1989-08-10
FR2650604A1 (en) 1991-02-08
FR2650604B1 (en) 1995-02-10
CA1322827C (en) 1993-10-12
FI880560A0 (en) 1988-02-08
SE507694C2 (en) 1998-07-06

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Legal Events

Date Code Title Description
NUG Patent has lapsed