FR2416975A1 - PROCESS FOR RECOVERING OLD PAPER SUCH AS HYDRORESISTANTS - Google Patents

PROCESS FOR RECOVERING OLD PAPER SUCH AS HYDRORESISTANTS

Info

Publication number
FR2416975A1
FR2416975A1 FR7903809A FR7903809A FR2416975A1 FR 2416975 A1 FR2416975 A1 FR 2416975A1 FR 7903809 A FR7903809 A FR 7903809A FR 7903809 A FR7903809 A FR 7903809A FR 2416975 A1 FR2416975 A1 FR 2416975A1
Authority
FR
France
Prior art keywords
paper
acidic
addition
hydroresistants
basic
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
FR7903809A
Other languages
French (fr)
Other versions
FR2416975B3 (en
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.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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 JM Voith GmbH filed Critical JM Voith GmbH
Publication of FR2416975A1 publication Critical patent/FR2416975A1/en
Application granted granted Critical
Publication of FR2416975B3 publication Critical patent/FR2416975B3/fr
Granted legal-status Critical Current

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
    • 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
    • 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
    • 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)

Abstract

La présente invention est du domaine des procédés de récupération des vieux papiers. L'invention a pour objet un procédé de récupération des vieux papiers, tels que des variétés de papiers dépourvus de bois et/ou contenant et/ou imprimés avec des produits résistants à l'eau et/ou conférant une réristance à l'eau, le procédé utilisant une dissolution en milieu alcalin et une addition d'agents chimiques de flottation, caractérisé dans sa généralité en ce que le papier à mettre en suspension est porté à ébullition dans un autoclave sous pression à des températures supérieures à 100 degrés et à un taux de matière sèche de 20 à 50 %, en milieu acide ou basique, ou successivement acide ou basique pendant plusieurs minutes, et en ce que la pâte est ensuite traitée par dilution et addition d'agents de flottation. Le procédé est notamment applicable sur des installations existantes.The present invention relates to the field of waste paper recovery processes. The subject of the invention is a process for recovering waste paper, such as varieties of paper devoid of wood and / or containing and / or printed with products which are resistant to water and / or which confer water resistance, the process using dissolution in an alkaline medium and the addition of chemical flotation agents, characterized in its generality in that the paper to be suspended is brought to a boil in an autoclave under pressure at temperatures above 100 degrees and at a dry matter content of 20 to 50%, in acidic or basic medium, or successively acidic or basic for several minutes, and in that the pulp is then treated by dilution and addition of flotation agents. The method is particularly applicable to existing installations.

FR7903809A 1978-02-09 1979-02-09 PROCESS FOR RECOVERING OLD PAPER SUCH AS HYDRORESISTANTS Granted FR2416975A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2805445A DE2805445C2 (en) 1978-02-09 1978-02-09 Process for recycling high quality waste paper

Publications (2)

Publication Number Publication Date
FR2416975A1 true FR2416975A1 (en) 1979-09-07
FR2416975B3 FR2416975B3 (en) 1981-12-11

Family

ID=6031530

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7903809A Granted FR2416975A1 (en) 1978-02-09 1979-02-09 PROCESS FOR RECOVERING OLD PAPER SUCH AS HYDRORESISTANTS

Country Status (8)

Country Link
AT (1) AT367116B (en)
DE (1) DE2805445C2 (en)
ES (1) ES477183A1 (en)
FI (1) FI68094C (en)
FR (1) FR2416975A1 (en)
GB (1) GB2014209B (en)
IT (1) IT1110272B (en)
SE (1) SE447493B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471441A1 (en) * 1979-11-28 1981-06-19 Voith Gmbh PROCESS AND INSTALLATION FOR SUSPENDING FIBERS FROM OLD PAPERS

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3305131A1 (en) * 1983-02-15 1984-08-16 Degussa Ag, 6000 Frankfurt METHOD FOR REMOVING WASTE PAPER
US5211809A (en) * 1991-05-21 1993-05-18 Air Products And Chemicals, Inc,. Dye removal in oxygen color stripping of secondary fibers
SE501309C2 (en) * 1993-05-28 1995-01-09 Klippans Finpappersbruk Ab Pulp production by digestion of a mixture of cellulose-based recycled material and raw wood
US6001218A (en) 1994-06-29 1999-12-14 Kimberly-Clark Worldwide, Inc. Production of soft paper products from old newspaper
US6074527A (en) 1994-06-29 2000-06-13 Kimberly-Clark Worldwide, Inc. Production of soft paper products from coarse cellulosic fibers
US6296736B1 (en) 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
US6387210B1 (en) 1998-09-30 2002-05-14 Kimberly-Clark Worldwide, Inc. Method of making sanitary paper product from coarse fibers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471441A1 (en) * 1979-11-28 1981-06-19 Voith Gmbh PROCESS AND INSTALLATION FOR SUSPENDING FIBERS FROM OLD PAPERS

Also Published As

Publication number Publication date
GB2014209B (en) 1983-01-12
GB2014209A (en) 1979-08-22
IT7919954A0 (en) 1979-02-07
FI790414A (en) 1979-08-10
FI68094C (en) 1985-07-10
SE447493B (en) 1986-11-17
IT1110272B (en) 1985-12-23
DE2805445B1 (en) 1978-09-28
SE7901031L (en) 1979-08-10
ATA867778A (en) 1981-10-15
AT367116B (en) 1982-06-11
FI68094B (en) 1985-03-29
ES477183A1 (en) 1979-07-16
FR2416975B3 (en) 1981-12-11
DE2805445C2 (en) 1979-06-07

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