SE8107564L - INTEGRATED WASHING PROCEDURE FOR CLEANING OF PRESSED WASTE PAPER - Google Patents

INTEGRATED WASHING PROCEDURE FOR CLEANING OF PRESSED WASTE PAPER

Info

Publication number
SE8107564L
SE8107564L SE8107564A SE8107564A SE8107564L SE 8107564 L SE8107564 L SE 8107564L SE 8107564 A SE8107564 A SE 8107564A SE 8107564 A SE8107564 A SE 8107564A SE 8107564 L SE8107564 L SE 8107564L
Authority
SE
Sweden
Prior art keywords
cleaning
waste paper
washing procedure
secs
pref
Prior art date
Application number
SE8107564A
Other languages
Swedish (sv)
Other versions
SE454520B (en
Inventor
G Calmanti
A Gatti
Original Assignee
Montedison Spa
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 Montedison Spa filed Critical Montedison Spa
Publication of SE8107564L publication Critical patent/SE8107564L/en
Publication of SE454520B publication Critical patent/SE454520B/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
    • 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
    • D21C5/025—De-inking
    • D21C5/027—Chemicals therefor
    • 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

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Paper (AREA)

Abstract

In a new process for printing ink etc removal from wastepaper a rapid flotation step is inserted between hydromechanical separation and washing stages. In the rapid flotation the 3-15% suspension is diluted to 0.05%-1 pref. 0.2-0.8wt% and undergoes flotation for less than 300 secs. pref 40-120 secs. with decolouring composition according to IT Pat. Appln. 28816A/77 and 27242A/78) The dilute suspension is transferred to the washing stages. Printing ink of hight and medium particle size is removed with low magent usage and removal of thermoplastic and sticky material. (Provisional basic previously advised in week E32)
SE8107564A 1980-12-23 1981-12-17 INTEGRATED WASHING PROCEDURE FOR CLEANING OF PRINTED RETURN PAPER SE454520B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2694480A IT1146404B (en) 1980-12-23 1980-12-23 Waste printed paper colour removal process

Publications (2)

Publication Number Publication Date
SE8107564L true SE8107564L (en) 1982-06-24
SE454520B SE454520B (en) 1988-05-09

Family

ID=11220592

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8107564A SE454520B (en) 1980-12-23 1981-12-17 INTEGRATED WASHING PROCEDURE FOR CLEANING OF PRINTED RETURN PAPER

Country Status (4)

Country Link
GR (1) GR81391B (en)
IT (1) IT1146404B (en)
SE (1) SE454520B (en)
YU (1) YU42121B (en)

Also Published As

Publication number Publication date
IT8026944A0 (en) 1980-12-23
YU42121B (en) 1988-04-30
GR81391B (en) 1984-12-11
SE454520B (en) 1988-05-09
IT1146404B (en) 1986-11-12
YU305981A (en) 1983-10-31

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