DE908695C - Process for removing thin metal layers from your documents - Google Patents

Process for removing thin metal layers from your documents

Info

Publication number
DE908695C
DE908695C DEU686D DEU0000686D DE908695C DE 908695 C DE908695 C DE 908695C DE U686 D DEU686 D DE U686D DE U0000686 D DEU0000686 D DE U0000686D DE 908695 C DE908695 C DE 908695C
Authority
DE
Germany
Prior art keywords
metal layer
documents
thin metal
metal layers
removing thin
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
DEU686D
Other languages
German (de)
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.)
Universum Film AG
Original Assignee
Universum Film AG
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 Universum Film AG filed Critical Universum Film AG
Priority to DEU686D priority Critical patent/DE908695C/en
Application granted granted Critical
Publication of DE908695C publication Critical patent/DE908695C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F5/00—Electrolytic stripping of metallic layers or coatings
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)

Description

Verfahren zum Ablösen dünner Metallschichten von ihren Unterlagen Bei den bisher bekannten Verfahren zum Ablösen dünner Metallschichten, die z. B. durch Kathodenzerstäubung, durch Rhodinieren oder entsprechende Verfahren auf ihre Unterlagen aufgebracht worden sind, mußte man sich bisher recht umständlicher Verfahren bedienen, da ein einfaches Lösungsmittel nicht bekannt war.Process for removing thin layers of metal from their substrates In the previously known method for removing thin metal layers, the z. B. by cathode sputtering, by rhodium plating or similar processes on their Documents have been applied, one had to go through a rather cumbersome procedure because a simple solvent was not known.

Gemäß der Erfindung wird vorgeschlagen, zur Ablösung dünner Metallschichten Nitrobenzol oder eine Mononitroverbindung der Homologen des Benzols als Lösungsmittel anzuwenden. Zum Ablösen der Metallschicht genügt das einfache Einbringen des Körpers, von dem die Metallschicht abzulösen ist., in ein Bad, das aus den oben bezeichneten Lösungsmitteln besteht. Das Lösungsvermögen des Nitrobenzols ist offenbar dadurch zu erklären, daß dieses in die Poren der dünnen Metallschicht eindringt und so von ihrer Unterlage abhebt.According to the invention it is proposed to remove thin metal layers Nitrobenzene or a mononitro compound of the homologues of benzene as a solvent apply. Simply insert the body to remove the metal layer, from which the metal layer is to be peeled off., in a bath consisting of those described above Solvents. The dissolving power of nitrobenzene is evidently due to this to explain that this penetrates into the pores of the thin metal layer and so from your document stands out.

Zur Beschleunigung des Lösungsprozesses wird gemäß einem weiteren Kennzeichen der Erfindung vorgeschlagen, die abzulösende Metallschicht in ein starkes elektrisches Feld zu bringen. Dieses Verfahren kann beispielsweise so durchgeführt werden, daß man in dem Lösungsbad der abzulösenden Metallschicht eine Elektrode von mindestens der Ausdehnung der Metallschicht im kleinen Abstand gegenüberstellt und zwischen dieser Elektrode und der Metallschicht eine elektrische Spannung anlegt.In order to accelerate the solution process, a further Characteristics of the invention proposed that the metal layer to be detached in a strong to bring an electric field. This method can for example be carried out in this way be that one in the solution bath of the metal layer to be stripped off an electrode of at least the expansion of the metal layer at a small distance and an electrical voltage is applied between this electrode and the metal layer.

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zum Ablösen dünner Metallschichten von ihren Unterlagen, gekennzeichnet durch die Abwendung von Nitrobenzol oder einer Mononitroverbindung der Homologen des Benzols als Lösungsmittel. z. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß sich die abzulösende Metallschicht in einem starken elektrischen Feld befindet. 3. Verfahren nach Anspruch z, dadurch gekennzeichnet, daß der abzulösenden Metallschicht eine Elektrode von mindestens der Ausdehnung der Metallschicht in kleinem Abstand gegenübergestellt und zwischen. dieser Elektrode und der Metallschicht eine elektrische Spannung angelegt wird.PATENT CLAIMS: i. Process for removing thin layers of metal from your documents by turning away from nitrobenzene or a mononitro compound of the homologue of benzene as a solvent. z. procedure according to claim r, characterized in that the metal layer to be detached is in a strong electric field. 3. The method according to claim z, characterized characterized in that the metal layer to be detached has an electrode of at least opposed to the expansion of the metal layer at a small distance and between. an electrical voltage is applied to this electrode and the metal layer.
DEU686D 1939-10-12 1939-10-12 Process for removing thin metal layers from your documents Expired DE908695C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEU686D DE908695C (en) 1939-10-12 1939-10-12 Process for removing thin metal layers from your documents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEU686D DE908695C (en) 1939-10-12 1939-10-12 Process for removing thin metal layers from your documents

Publications (1)

Publication Number Publication Date
DE908695C true DE908695C (en) 1954-04-08

Family

ID=7564899

Family Applications (1)

Application Number Title Priority Date Filing Date
DEU686D Expired DE908695C (en) 1939-10-12 1939-10-12 Process for removing thin metal layers from your documents

Country Status (1)

Country Link
DE (1) DE908695C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163117B (en) * 1957-09-27 1964-02-13 Mark Weisberg Bath for the electroless removal of nickel, cobalt or cadmium layers applied by galvanic means
DE1163116B (en) * 1957-07-01 1964-02-13 Mark Weisberg Bath for the currentless removal of galvanically applied metal coatings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163116B (en) * 1957-07-01 1964-02-13 Mark Weisberg Bath for the currentless removal of galvanically applied metal coatings
DE1163117B (en) * 1957-09-27 1964-02-13 Mark Weisberg Bath for the electroless removal of nickel, cobalt or cadmium layers applied by galvanic means

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