IT1146404B - Waste printed paper colour removal process - Google Patents

Waste printed paper colour removal process

Info

Publication number
IT1146404B
IT1146404B IT2694480A IT2694480A IT1146404B IT 1146404 B IT1146404 B IT 1146404B IT 2694480 A IT2694480 A IT 2694480A IT 2694480 A IT2694480 A IT 2694480A IT 1146404 B IT1146404 B IT 1146404B
Authority
IT
Italy
Prior art keywords
removal process
printed paper
waste printed
secs
pref
Prior art date
Application number
IT2694480A
Other languages
Italian (it)
Other versions
IT8026944A0 (en
Inventor
Giulio Calmanti
Alfonso 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
Priority to IT2694480A priority Critical patent/IT1146404B/en
Publication of IT8026944A0 publication Critical patent/IT8026944A0/en
Priority to SE8107564A priority patent/SE454520B/en
Priority to GR66879A priority patent/GR81391B/el
Priority to YU305981A priority patent/YU42121B/en
Application granted granted Critical
Publication of IT1146404B publication Critical patent/IT1146404B/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

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)
IT2694480A 1980-12-23 1980-12-23 Waste printed paper colour removal process IT1146404B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
IT2694480A IT1146404B (en) 1980-12-23 1980-12-23 Waste printed paper colour removal process
SE8107564A SE454520B (en) 1980-12-23 1981-12-17 INTEGRATED WASHING PROCEDURE FOR CLEANING OF PRINTED RETURN PAPER
GR66879A GR81391B (en) 1980-12-23 1981-12-21
YU305981A YU42121B (en) 1980-12-23 1981-12-22 Integrated washing process for the elimenation of ink from waste paper

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
IT8026944A0 IT8026944A0 (en) 1980-12-23
IT1146404B true IT1146404B (en) 1986-11-12

Family

ID=11220592

Family Applications (1)

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

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
SE8107564L (en) 1982-06-24
SE454520B (en) 1988-05-09
YU42121B (en) 1988-04-30
GR81391B (en) 1984-12-11
YU305981A (en) 1983-10-31

Similar Documents

Publication Publication Date Title
DE3169864D1 (en) Light-sensitive composition, light-sensitive copying material made therefrom, and process for producing a printing forme from this material
YU76185A (en) Process for pulp gaining from recycled celulose material contaminated by press ink
NZ222539A (en) Method and apparatus for making filler-containing paper,by co-flocculating fine pulp
ES8503758A1 (en) Apparatus for deinking.
DE3473066D1 (en) Method and apparatus for maintaining a desired margin on sheets of print receiving material in a printing machine
JPS55152887A (en) Formation of pulp suspension from paper and pulper used in method
GB2021294B (en) Method and arrangement for regulating the discharge process in a cathode sputtering apparatus
ES8201663A1 (en) Process for the removal of pigments from waste-paper.
IT1146404B (en) Waste printed paper colour removal process
CA2149235A1 (en) Deinking of printed paper by agglomeration process
JPS5777383A (en) Method and apparatus for grinding pulp material
JPS5613050A (en) Method of separating phenol resin and copper component from print substrate waste material
EP0074098A3 (en) Stencil paper for mimeography and process for making stencil
JPS5767457A (en) Method and apparatus for forming pile from paper sheet or similar material
GB2114178B (en) A process for producing fibrous material from waste paper
GB2268425B (en) Differential grinding
DE2960542D1 (en) Process for deinking printed waste paper
AU2249397A (en) Method for recovering fiber from printed wastepaper
AU657747B2 (en) Process and composition for deinking dry toner electrostatic printed wastepaper
GB2080133B (en) Plant for dissolving waste paper and then sorting fibres therefrom
CA2256005A1 (en) Process for deinking papermaking pulp obtained from recycled paper
AU571190B2 (en) Light-sensitive composition and process for preparing a printing form
DE3561478D1 (en) Process and apparatus for recycling printed waste paper
USD277766S (en) Apparatus for printing and paper preparation
EP0319510A3 (en) Method for the manufacture of press knives for sheet material resembling cardboard

Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19941222