DE747716C - Process for regenerating printing paper - Google Patents

Process for regenerating printing paper

Info

Publication number
DE747716C
DE747716C DEF83356D DEF0083356D DE747716C DE 747716 C DE747716 C DE 747716C DE F83356 D DEF83356 D DE F83356D DE F0083356 D DEF0083356 D DE F0083356D DE 747716 C DE747716 C DE 747716C
Authority
DE
Germany
Prior art keywords
paper
alkaline earth
regenerating
patents
printing paper
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
DEF83356D
Other languages
German (de)
Inventor
Hans Fehn
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.)
HANS FEHN
Original Assignee
HANS FEHN
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 HANS FEHN filed Critical HANS FEHN
Priority to DEF83356D priority Critical patent/DE747716C/en
Application granted granted Critical
Publication of DE747716C publication Critical patent/DE747716C/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)

Description

Verfahren zum Regenerieren von Druckpapier Für die Aufbereitung von Altpapier, insbesondere von bedrucktem Papier, sind bereits zahlreiche Verfahren bekannt.Process for regenerating printing paper For the preparation of Waste paper, especially printed paper, are already numerous processes known.

So ist vorgeschlagen worden, Altpapier, in Gegenwart voll Calciumhydroxyd zu einem Brei zu verarbeiten, um auf diese Weise die Druckfarbe mit dem Bindemittel von dem Papier abzulösen und zu entfernen. Bei einem anderen Verfahren dient ein Gemisch von Ätzalkali, Erclalkalilydroxyden und geringen Mengen Erdalkalisilikat oder Erdalkalicarbonat als Löser, um die Druckerschwärze zu entfernen. Der Zusatz von Erdalkalicarbonat oder -silikat- die in der Behandlungsflüssigkeit nicht gebildet werden, dient lediglich der Aufhellung der natürlichen Papierfärbung und erfolgt in so geringen Mengen, etwa I5 kg Magnesiumcarbonat auf Iooo kg Altpapier, daß diese zur Verdeckung der in der Masse verbliebenen Druckerschwärze wirkungslos sind.So it has been proposed to use waste paper in the presence of full calcium hydroxide to process into a pulp, in this way the printing ink with the binder peel and remove from the paper. Another method uses a Mixture of caustic alkali, alkaline earth hydroxides and small amounts of alkaline earth silicate or alkaline earth carbonate as a solvent to remove the printing ink. The addition from alkaline earth carbonate or -silicate- not formed in the treatment liquid only serves to lighten the natural color of the paper and is done in such small quantities, about 15 kg of magnesium carbonate on 100 kg of waste paper, that this are ineffective for covering the printing ink remaining in the mass.

Diese Verfahren, die im wesentlichen zum Ablösen der Druckfarbe von den Papierfasern dienen sollen, besitzen aber den Nachteil, daß die Fasern durch die hierfür nötige andauernde und energische Einwirkung alkalischer Stoffe verfärbt werden und trotzdem die Ablösung der Druckfarbe von den Fasern nicht vollständig ist.This process, which essentially removes the printing ink from it to serve the paper fibers, but have the disadvantage that the fibers through the persistent and vigorous action of alkaline substances required for this discolours and yet the separation of the printing ink from the fibers is not complete is.

Erfindungsgemäß wird der bisher versuchte Weg des Ablösens der Druckfarbe verlassen ünd auf die in wäßriger Aufschwemmung befindlichen Fasern cles Altpapiers durch Zugabe von Erdallalilvdroxyd und durch Einleiten von Kohlendioxyd Erclalkalicarlonat in einem beliebigen Behälter mit Rührvorrichtung niedergeschlagen, un die Druckfarbe zu Verdecken. Nach den bisherigen Erfahrungen erschien eine derartige Arbeitsweise, wonach also ein Verdecken leg Drttckfarbe und kein Ablösen derselben herbeigeführt werden soll. wenig aussichtsreich und war daher die erzielte befriedigelicle Wirkung überraschend. Auch daraus, daß (las füllen von Papier im Stoff auf diesem \\"ege bekannt war, ist die erfindungsgemaße Benltltzung dieser Arbeitsweise bei der Regeneration von Altpapier nicht nahegelegt worrden.According to the invention, the hitherto attempted way of detaching the printing ink becomes rely on the fibers of the waste paper which are in watery suspension by adding Erdallalilvdroxyd and by introducing carbon dioxide Erclalkalicarlonat in any container with a stirrer, precipitate the printing ink to cover up. According to previous experience, such a way of working appeared, according to which, therefore, a concealment is brought about and no detachment of the same is brought about shall be. little promising and was therefore the achieved satisfactory gelicle effect surprised. Also from the fact that (read the filling of paper in the fabric on this \\ "ege was known is the inventive use of this mode of operation were not suggested in the regeneration of waste paper.

Der Papierbrei wird dann in der in der deutschen Patentschrift 663 944 beschriebenen Weise weiterverarbeitet.The paper pulp is then processed in the manner described in German Patent 663 944 described manner further processed.

Claims (2)

PATENTANSPRUCH: Verfahren zum Regenerieren von bee: drucktemrut Papier für die Papierherstellung unter Zerfaserung des Papiers zu einem Brei und untter Anwendung von Erdalkaligekennzeichnet , daß man auf die in wäßriger Aufschwernmung befindlichen Papierfasern durch Zugabe von Erdalkalihydroxyd und durch Einleiten von Kohlendioxyd Erdalkalicarbonat niederschlägt, worauf der so gewonnene Stoff in bekannter Weise weiterverarbeitet wird. Zur Abgrenzung des Anmeldungsgegenstandes vorn Stand ler Technik find im Erteilungsverfahren folgende Druckschriften in Be macht gezogen worden: deutsche Patentschriften.....Nr.II8 960 49I o5o: österreichische Patentschrift. . - I2( 353: britische I26 s79: USA.-Patentschriften . . , . . . . -I4244II, I 919 I4c : »Praktisches Handbuch der Papierfabrikation« von Carl H o t In a l n . PATENT CLAIM: Process for regenerating bee: drucktemrut paper for paper production with defibration of the paper to a pulp and below The use of alkaline earths indicates that one is exposed to the watery suspension located paper fibers by adding alkaline earth hydroxide and by introducing it of carbon dioxide, alkaline earth carbonate precipitates, whereupon the substance obtained in this way is further processed in a known manner. To delimit the subject of the registration from the state of the art, the following documents are in Be power has been drawn: German patents ..... Nr.II8 960 49I o5o: Austrian Patent specification. . - I2 (353: British I26 s79: USA. Patents..,.... . -I4244II, I 919 I4c: "Practical Manual of Paper Manufacture" by Carl H o t In a l n. 2. Aull.. . I. Band (I89I). S. 4o4, (I897). S. I078: »Die Altpapierverarbeitung« von Fritz Hoyer (I()27). S. I43.2. Aull ... Volume I (189I). P. 404, (1897). P. I078: "The waste paper processing" by Fritz Hoyer (I () 27). P. I43.
DEF83356D 1937-01-27 1937-01-27 Process for regenerating printing paper Expired DE747716C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF83356D DE747716C (en) 1937-01-27 1937-01-27 Process for regenerating printing paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF83356D DE747716C (en) 1937-01-27 1937-01-27 Process for regenerating printing paper

Publications (1)

Publication Number Publication Date
DE747716C true DE747716C (en) 1944-10-11

Family

ID=7114073

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF83356D Expired DE747716C (en) 1937-01-27 1937-01-27 Process for regenerating printing paper

Country Status (1)

Country Link
DE (1) DE747716C (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE118960C (en) *
GB126879A (en) * 1918-08-31 1919-05-22 William Clark Improvements in or relating to the Removal of Printers' Ink from Paper Stock, and the Preparation of Paper Pulp.
US1424411A (en) * 1916-12-15 1922-08-01 Lincoln Trust Company Method for recovering waste paper
DE491656C (en) * 1926-12-30 1930-02-12 Louis Grenaudier Dr Process for the recovery of paper stock from printed waste paper
AT126353B (en) * 1929-11-18 1932-01-25 Robert Weber Process for the production of a pure paper stock from printed waste paper.
US1919140A (en) * 1929-11-18 1933-07-18 Weber Process for the production of clean paper pulp from old printed paper

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE118960C (en) *
US1424411A (en) * 1916-12-15 1922-08-01 Lincoln Trust Company Method for recovering waste paper
GB126879A (en) * 1918-08-31 1919-05-22 William Clark Improvements in or relating to the Removal of Printers' Ink from Paper Stock, and the Preparation of Paper Pulp.
DE491656C (en) * 1926-12-30 1930-02-12 Louis Grenaudier Dr Process for the recovery of paper stock from printed waste paper
AT126353B (en) * 1929-11-18 1932-01-25 Robert Weber Process for the production of a pure paper stock from printed waste paper.
US1919140A (en) * 1929-11-18 1933-07-18 Weber Process for the production of clean paper pulp from old printed paper

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