NO304994B1 - Procedure for preparing printed paper - Google Patents

Procedure for preparing printed paper

Info

Publication number
NO304994B1
NO304994B1 NO931842A NO931842A NO304994B1 NO 304994 B1 NO304994 B1 NO 304994B1 NO 931842 A NO931842 A NO 931842A NO 931842 A NO931842 A NO 931842A NO 304994 B1 NO304994 B1 NO 304994B1
Authority
NO
Norway
Prior art keywords
paper
pulping
stage
waste
stator
Prior art date
Application number
NO931842A
Other languages
Norwegian (no)
Other versions
NO931842L (en
NO931842D0 (en
Inventor
Herbert Ortner
Rflinger Hans-Dieter D
Original Assignee
Voith Gmbh J M
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 Voith Gmbh J M filed Critical Voith Gmbh J M
Publication of NO931842L publication Critical patent/NO931842L/en
Publication of NO931842D0 publication Critical patent/NO931842D0/en
Publication of NO304994B1 publication Critical patent/NO304994B1/en

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
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention concerns a method of processing printed waste-paper, in particular waste-paper containing at least 80 % newspaper or magazine paper, by dissolving the paper, various cleaning stages, flotation or washing and subsequently pulping to a degree of consistency of at least 20 % and, optionally, bleaching. The invention is characterized in that a second, terminal, pulping stage is carried out, optionally followed by bleaching stage. In the second pulping stage, the waste-paper is subjected to a vigorous kneading action by individually mounted rod-shaped or stud-shaped kneading elements on both the stator and rotor of the pulping machine. The stator and rotor are disposed in a pulping chamber delimited by the surfaces of two concentric cylinders. Pulping is carried out oven-dry at temperatures between 20 and 110 C, preferably 38 to 65 C, at a specific power consumption of between 30 and 100, preferably 80 kWh per ton of oven-dried paper.
NO931842A 1991-09-20 1993-05-19 Procedure for preparing printed paper NO304994B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4131308 1991-09-20
DE4133683A DE4133683A1 (en) 1991-09-20 1991-10-11 METHOD FOR PROCESSING PRINTED WASTE PAPER
PCT/EP1992/002151 WO1993006295A1 (en) 1991-09-20 1992-09-18 Method of processing printed waste-paper

Publications (3)

Publication Number Publication Date
NO931842L NO931842L (en) 1993-05-19
NO931842D0 NO931842D0 (en) 1993-05-19
NO304994B1 true NO304994B1 (en) 1999-03-15

Family

ID=25907522

Family Applications (1)

Application Number Title Priority Date Filing Date
NO931842A NO304994B1 (en) 1991-09-20 1993-05-19 Procedure for preparing printed paper

Country Status (8)

Country Link
EP (1) EP0558729B1 (en)
JP (1) JPH06503388A (en)
AT (1) ATE135428T1 (en)
CA (1) CA2096659C (en)
DE (2) DE4133683A1 (en)
FI (1) FI103675B1 (en)
NO (1) NO304994B1 (en)
WO (1) WO1993006295A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233286A1 (en) * 1992-10-02 1994-04-07 Voith Gmbh J M Process for the treatment of printed waste paper
DE19614947B4 (en) * 1996-04-16 2004-04-08 Voith Paper Fiber Systems Gmbh & Co. Kg Process for increasing the whiteness of paper pulp

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904279A (en) * 1959-08-27 1962-08-29 Butler Co Method of processing waste paper
GB1429626A (en) * 1972-03-25 1976-03-24 Watford Eng Ltd Bulk material processing apparatus
US3891497A (en) * 1973-03-22 1975-06-24 Beloit Corp Non-aqueous defiberizing process of waste paper in the presence of steam and a liquid nonmiscible in water, e.g., tetrachlorethylene
CH574538A5 (en) * 1974-02-26 1976-04-15 Escher Wyss Gmbh
CS205557B1 (en) * 1978-10-26 1981-05-29 Svetozar Vagac Low-grade waste paper processing plant
GB2112830A (en) * 1981-12-09 1983-07-27 Steinbeis Papier Gmbh Upgrading used paper
IT1155310B (en) * 1982-04-19 1987-01-28 Jean Marie Clement PROCESS FOR THE RECYCLING PROCESS OF PAPER PRINTED FROM MACERO
DE3827336A1 (en) * 1988-08-12 1990-02-15 Escher Wyss Gmbh METHOD FOR TREATING THE SHORT FIBER FRACTION AFTER SEPARATING THE LONG FIBER FRACTION FROM A SECONDARY FIBER MIXTURE, ESPECIALLY FOR THE PRODUCTION OF CARTON BOXES
IT1227995B (en) * 1989-01-27 1991-05-22 Comer Spa A S DEKINKING EQUIPMENT IN THE CONSTANT PART OF PAPER PRODUCTION PLANTS.

Also Published As

Publication number Publication date
EP0558729B1 (en) 1996-03-13
EP0558729A1 (en) 1993-09-08
DE59205700D1 (en) 1996-04-18
NO931842L (en) 1993-05-19
FI932296A0 (en) 1993-05-19
CA2096659A1 (en) 1993-03-21
DE4133683A1 (en) 1993-03-25
FI103675B (en) 1999-08-13
ATE135428T1 (en) 1996-03-15
JPH06503388A (en) 1994-04-14
CA2096659C (en) 1999-08-03
FI932296A (en) 1993-05-19
NO931842D0 (en) 1993-05-19
WO1993006295A1 (en) 1993-04-01
FI103675B1 (en) 1999-08-13

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Legal Events

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MM1K Lapsed by not paying the annual fees

Free format text: LAPSED IN MARCH 2001