GB506472A - Process for removing printing ink from printed paper - Google Patents

Process for removing printing ink from printed paper

Info

Publication number
GB506472A
GB506472A GB2205838A GB2205838A GB506472A GB 506472 A GB506472 A GB 506472A GB 2205838 A GB2205838 A GB 2205838A GB 2205838 A GB2205838 A GB 2205838A GB 506472 A GB506472 A GB 506472A
Authority
GB
United Kingdom
Prior art keywords
paper
solution
mill
added
ink
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.)
Expired
Application number
GB2205838A
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.)
BERTHOLD RASSOW
EDGAR HERFERTH
Original Assignee
BERTHOLD RASSOW
EDGAR HERFERTH
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 BERTHOLD RASSOW, EDGAR HERFERTH filed Critical BERTHOLD RASSOW
Publication of GB506472A publication Critical patent/GB506472A/en
Expired 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
    • 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

506,472. Preparing pulp from waste paper; paper. RASSOW, B., and HERFERTH, E. July 25, 1938, Nos. 22058 and 22059. Convention dates, July 24, 1937, and Nov. 15, 1937. [Class 2 (ii)] [Also in Group VIII] Printing-ink is removed from printed paper by reducing the paper to fibre in a washing solution consisting of an aqueous solution of alkali or ammonium pyrophosphate. The solution may also contain other washing agents or adsorption agents. The material obtained may form half the material for the production of new paper. Colouring matter may be added to compensate for the blue shade of the mass produced. In an example, printed newspaper is beaten up with a solution of tetra-sodium pyrophosphate. The liquid containing the printing-ink which has been washed away from the fibres is removed through a sieve. In another example, newspaper waste sheets are mixed with a solution of sodium pyrophosphate in an edge-mill and kaolin is added as an adsorption and loading agent. The paste obtained is added to a weakly acid pulp and worked up into paper. Instead of an edge-mil, there may be used a Hollander, Jordan mill, ball-mill, refiner, rotary boiler, or container with pump installation. Additional washing agents include soaps, soda, and sodium octadecanolmethyl-aminoethanesulphonate.
GB2205838A 1937-07-24 1938-07-25 Process for removing printing ink from printed paper Expired GB506472A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE208192X 1937-07-24

Publications (1)

Publication Number Publication Date
GB506472A true GB506472A (en) 1939-05-30

Family

ID=5794105

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2205838A Expired GB506472A (en) 1937-07-24 1938-07-25 Process for removing printing ink from printed paper

Country Status (4)

Country Link
CH (1) CH208192A (en)
FR (1) FR841053A (en)
GB (1) GB506472A (en)
NL (1) NL52906C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743178A (en) * 1948-07-19 1956-04-24 Krodel Process for de-inking printed waste paper
US5360512A (en) * 1989-03-15 1994-11-01 Woodfree Limited Method and product for treating waste paper material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502330A (en) * 1943-03-01 1950-03-28 Clarence E Libby Washing paper pulp to remove coloring matter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743178A (en) * 1948-07-19 1956-04-24 Krodel Process for de-inking printed waste paper
US5360512A (en) * 1989-03-15 1994-11-01 Woodfree Limited Method and product for treating waste paper material

Also Published As

Publication number Publication date
NL52906C (en) 1900-01-01
CH208192A (en) 1940-01-15
FR841053A (en) 1939-05-10

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