FR2406022A1 - Paper pulp prodn. - using high vacuum to improve saturation of liquors without damage to fibrous content - Google Patents

Paper pulp prodn. - using high vacuum to improve saturation of liquors without damage to fibrous content

Info

Publication number
FR2406022A1
FR2406022A1 FR7731207A FR7731207A FR2406022A1 FR 2406022 A1 FR2406022 A1 FR 2406022A1 FR 7731207 A FR7731207 A FR 7731207A FR 7731207 A FR7731207 A FR 7731207A FR 2406022 A1 FR2406022 A1 FR 2406022A1
Authority
FR
France
Prior art keywords
high vacuum
liquors
pulp
paper pulp
damage
Prior art date
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.)
Granted
Application number
FR7731207A
Other languages
French (fr)
Other versions
FR2406022B1 (en
Inventor
Roger Vallon
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.)
OMNIUM FRANCAIS INDL CAL
Original Assignee
OMNIUM FRANCAIS INDL CAL
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 OMNIUM FRANCAIS INDL CAL filed Critical OMNIUM FRANCAIS INDL CAL
Priority to FR7731207A priority Critical patent/FR2406022A1/en
Priority to BE191155A priority patent/BE871303A/en
Priority to IT28845/78A priority patent/IT1099935B/en
Publication of FR2406022A1 publication Critical patent/FR2406022A1/en
Application granted granted Critical
Publication of FR2406022B1 publication Critical patent/FR2406022B1/fr
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

In the prodn. of paper pulp from wood, straw or old papers, the pulp is submitted to high vacuum, in one or more stages, with pressuring interspersed between them, previous to the known preparation of the pulp using a mechanical tearing process. A liquid impregnation of the pulp is effected during the high vacuum stage. The introduction of high vacuum stages reduces the energy requirement for pulping, provides a more efficient re-cycling of basic materials, and improves the impregnation of saturation liquors. There is a reduced risk of long fibre shrinkage or breakage.
FR7731207A 1977-10-17 1977-10-17 Paper pulp prodn. - using high vacuum to improve saturation of liquors without damage to fibrous content Granted FR2406022A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7731207A FR2406022A1 (en) 1977-10-17 1977-10-17 Paper pulp prodn. - using high vacuum to improve saturation of liquors without damage to fibrous content
BE191155A BE871303A (en) 1977-10-17 1978-10-16 PROCESS USING A PREVIOUS VACUUM FOR THE MANUFACTURE OF PAPER PULP
IT28845/78A IT1099935B (en) 1977-10-17 1978-10-17 PROCESS USING A VACUUM QUOTE FOR THE MANUFACTURE OF PAPER PASTE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7731207A FR2406022A1 (en) 1977-10-17 1977-10-17 Paper pulp prodn. - using high vacuum to improve saturation of liquors without damage to fibrous content

Publications (2)

Publication Number Publication Date
FR2406022A1 true FR2406022A1 (en) 1979-05-11
FR2406022B1 FR2406022B1 (en) 1980-10-17

Family

ID=9196595

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7731207A Granted FR2406022A1 (en) 1977-10-17 1977-10-17 Paper pulp prodn. - using high vacuum to improve saturation of liquors without damage to fibrous content

Country Status (3)

Country Link
BE (1) BE871303A (en)
FR (1) FR2406022A1 (en)
IT (1) IT1099935B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650540A1 (en) * 1992-03-20 1995-05-03 Ivar H. Stockel Baled waste paper pre-recycling treatment
EP0990733A1 (en) * 1998-10-02 2000-04-05 Voith Sulzer Papiertechnik Patent GmbH Method for killing germs in a material containing papermaking fibres and apparatus for applying the method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650540A1 (en) * 1992-03-20 1995-05-03 Ivar H. Stockel Baled waste paper pre-recycling treatment
EP0650540A4 (en) * 1992-03-20 1996-03-06 Ivar H Stockel Baled waste paper pre-recycling treatment.
EP0990733A1 (en) * 1998-10-02 2000-04-05 Voith Sulzer Papiertechnik Patent GmbH Method for killing germs in a material containing papermaking fibres and apparatus for applying the method

Also Published As

Publication number Publication date
FR2406022B1 (en) 1980-10-17
IT7828845A0 (en) 1978-10-17
BE871303A (en) 1979-04-17
IT1099935B (en) 1985-09-28

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Legal Events

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CL Concession to grant licences
ST Notification of lapse