CA2048618A1 - A method of de-inking waste paper materials - Google Patents

A method of de-inking waste paper materials

Info

Publication number
CA2048618A1
CA2048618A1 CA002048618A CA2048618A CA2048618A1 CA 2048618 A1 CA2048618 A1 CA 2048618A1 CA 002048618 A CA002048618 A CA 002048618A CA 2048618 A CA2048618 A CA 2048618A CA 2048618 A1 CA2048618 A1 CA 2048618A1
Authority
CA
Canada
Prior art keywords
stock
waste paper
paper materials
ink particles
fibrous
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
CA002048618A
Other languages
French (fr)
Other versions
CA2048618C (en
Inventor
Stanley Blum
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.)
Woodfree Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Priority claimed from PCT/GB1990/000385 external-priority patent/WO1990010749A1/en
Publication of CA2048618A1 publication Critical patent/CA2048618A1/en
Application granted granted Critical
Publication of CA2048618C publication Critical patent/CA2048618C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • 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

  • Paper (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A method of de-inking waste paper materials consists in pulping the paper material in a hydropulper (I) to form a fibrous stack, and adding a substance in the form of a mixture of phosphated and carbonated sodium salts to the fibrous stock to dis-perse ink particles from the stock, The stock and dispersed ink particles pass through washing stages (4), (7) and (8), in a centrifu-gal cleaner (3), in order to remove the ink particles from the fibrous stock.
CA 2048618 1989-03-15 1990-03-14 A method of de-inking waste paper materials Expired - Fee Related CA2048618C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8905942A GB8905942D0 (en) 1989-03-15 1989-03-15 A method of de-inking waste paper materials
GB8905942.2 1989-03-15
PCT/GB1990/000385 WO1990010749A1 (en) 1989-03-15 1990-03-14 Method of de-inking waste paper materials

Publications (2)

Publication Number Publication Date
CA2048618A1 true CA2048618A1 (en) 1990-09-16
CA2048618C CA2048618C (en) 2002-04-23

Family

ID=10653370

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2048618 Expired - Fee Related CA2048618C (en) 1989-03-15 1990-03-14 A method of de-inking waste paper materials

Country Status (16)

Country Link
KR (1) KR0151110B1 (en)
BG (1) BG95308A (en)
BR (1) BR9007224A (en)
CA (1) CA2048618C (en)
DE (1) DE69017205T2 (en)
FI (1) FI914276A0 (en)
GB (1) GB8905942D0 (en)
IN (1) IN174412B (en)
LT (1) LTIP1852A (en)
MC (1) MC2179A1 (en)
MW (1) MW5091A1 (en)
MY (1) MY107139A (en)
NZ (1) NZ232892A (en)
PH (1) PH27030A (en)
PT (1) PT93425B (en)
ZA (1) ZA901713B (en)

Also Published As

Publication number Publication date
KR920701565A (en) 1992-08-12
MY107139A (en) 1995-09-30
NZ232892A (en) 1991-11-26
DE69017205D1 (en) 1995-03-30
PH27030A (en) 1993-02-01
MW5091A1 (en) 1993-02-10
KR0151110B1 (en) 1999-05-15
GB8905942D0 (en) 1989-04-26
LTIP1852A (en) 1995-08-25
MC2179A1 (en) 1992-05-22
BR9007224A (en) 1992-02-18
CA2048618C (en) 2002-04-23
BG95308A (en) 1993-12-24
IN174412B (en) 1994-12-03
FI914276A0 (en) 1991-09-11
ZA901713B (en) 1990-12-28
PT93425B (en) 1996-09-30
DE69017205T2 (en) 1995-10-19
PT93425A (en) 1990-11-07

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed