GB257774A - Improvements in process for reclaiming used paper - Google Patents

Improvements in process for reclaiming used paper

Info

Publication number
GB257774A
GB257774A GB2786625A GB2786625A GB257774A GB 257774 A GB257774 A GB 257774A GB 2786625 A GB2786625 A GB 2786625A GB 2786625 A GB2786625 A GB 2786625A GB 257774 A GB257774 A GB 257774A
Authority
GB
United Kingdom
Prior art keywords
pulp
sulphite
paper
excess
caustic soda
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
GB2786625A
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.)
Individual
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
Priority to US1514625 priority Critical patent/US1572478A/en
Priority to FR606098D priority patent/FR606098A/en
Application filed by Individual filed Critical Individual
Priority to GB2786625A priority patent/GB257774A/en
Publication of GB257774A publication Critical patent/GB257774A/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

257,774. Hammond, G. Nov. 5, 1925. Pulp, preparation of.-Newspaper or other paper having a pigment applied thereto is reclaimed by reducing the paper to pulp and removing the pigment therefrom and then mixing the pulp with an alkali acid sulphite at a temperature below 110‹ F. Prior to treating with the sulphite the pulp may be treated with a caustic soda solution, also at a temperature of 110‹ F., the amount of caustic soda used being approximately 2.5 per cent by weight of the paper treated. The alkali acid sulphite is preferably added in excess of that required to neutralize the alkalinity of the pump, the resulting pulp being washed to remove the excess sulphite.
GB2786625A 1925-03-12 1925-11-05 Improvements in process for reclaiming used paper Expired GB257774A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US1514625 US1572478A (en) 1925-03-12 1925-03-12 Process for reclaiming used paper
FR606098D FR606098A (en) 1925-11-05 1925-10-27 Process for refurbishing papers that have already been used for printing
GB2786625A GB257774A (en) 1925-11-05 1925-11-05 Improvements in process for reclaiming used paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2786625A GB257774A (en) 1925-11-05 1925-11-05 Improvements in process for reclaiming used paper

Publications (1)

Publication Number Publication Date
GB257774A true GB257774A (en) 1926-09-09

Family

ID=10266577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2786625A Expired GB257774A (en) 1925-03-12 1925-11-05 Improvements in process for reclaiming used paper

Country Status (3)

Country Link
US (1) US1572478A (en)
FR (1) FR606098A (en)
GB (1) GB257774A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673798A (en) * 1949-07-20 1954-03-30 Zundel Jean Ernest Deinking
US5458737A (en) * 1993-07-27 1995-10-17 Hoechst Celanese Corporation Quaternary compounds as brightness enhancers
US5560805A (en) * 1993-07-27 1996-10-01 Hoechst Celanese Corporation Enhanced decolorization of waste paper with selected amines
US5580422A (en) * 1993-07-27 1996-12-03 Hoechst Celanese Corporation Brightening color dyed wastepaper with a bleaching agent and a quaternary compound
US5882476A (en) * 1995-05-05 1999-03-16 Solvay Minerals, Inc. Deinking printed wastepaper using alkaline solution containing sodium sulfite and sodium carbonate

Also Published As

Publication number Publication date
FR606098A (en) 1926-06-07
US1572478A (en) 1926-02-09

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