DE2139040B2 - - Google Patents

Info

Publication number
DE2139040B2
DE2139040B2 DE2139040A DE2139040A DE2139040B2 DE 2139040 B2 DE2139040 B2 DE 2139040B2 DE 2139040 A DE2139040 A DE 2139040A DE 2139040 A DE2139040 A DE 2139040A DE 2139040 B2 DE2139040 B2 DE 2139040B2
Authority
DE
Germany
Prior art keywords
paper
digestion solution
sodium
printing
waste paper
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
DE2139040A
Other languages
German (de)
English (en)
Other versions
DE2139040C3 (de
DE2139040A1 (de
Inventor
C. Roy Chicago Ill. Gleason (V.St.A.)
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.)
Waste Paper Reclamation Corp Chicago Ill (vsta)
Original Assignee
Waste Paper Reclamation Corp Chicago Ill (vsta)
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 Waste Paper Reclamation Corp Chicago Ill (vsta) filed Critical Waste Paper Reclamation Corp Chicago Ill (vsta)
Publication of DE2139040A1 publication Critical patent/DE2139040A1/de
Publication of DE2139040B2 publication Critical patent/DE2139040B2/de
Application granted granted Critical
Publication of DE2139040C3 publication Critical patent/DE2139040C3/de
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02Working-up waste paper
    • D21C5/025De-inking
    • D21C5/027Chemicals therefor
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/64Paper recycling

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Paper (AREA)
DE19712139040 1971-08-04 Verfahren zur Rückgewinnung des Papierstoffs aus Altpapier Expired DE2139040C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3398870A 1970-05-01 1970-05-01

Publications (3)

Publication Number Publication Date
DE2139040A1 DE2139040A1 (de) 1973-02-15
DE2139040B2 true DE2139040B2 (show.php) 1975-04-10
DE2139040C3 DE2139040C3 (de) 1977-03-10

Family

ID=

Also Published As

Publication number Publication date
GB1325505A (en) 1973-08-01
US3620909A (en) 1971-11-16
DE2139040A1 (de) 1973-02-15
AU3193971A (en) 1973-02-08
FR2148992A5 (show.php) 1973-03-23
AU467596B2 (en) 1975-12-04

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee