DE3169917D1 - Method of selectively dissolving molybdenum in the presence of tungsten - Google Patents

Method of selectively dissolving molybdenum in the presence of tungsten

Info

Publication number
DE3169917D1
DE3169917D1 DE8181110588T DE3169917T DE3169917D1 DE 3169917 D1 DE3169917 D1 DE 3169917D1 DE 8181110588 T DE8181110588 T DE 8181110588T DE 3169917 T DE3169917 T DE 3169917T DE 3169917 D1 DE3169917 D1 DE 3169917D1
Authority
DE
Germany
Prior art keywords
tungsten
molybdenum
dissolving
selectively
selectively dissolving
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
DE8181110588T
Other languages
German (de)
Inventor
Karoly Dr Dipl Chem Vadasdi
Laszlo Dr Dipl Chem Bartha
Andras Dr Dipl Chem Kiss
Tivadar Dr Dipl Chem I Millner
Endre Tekula
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.)
Magyar Tudomanyos Akademia Muszaki Fizikai Kutato Intezete
Original Assignee
Magyar Tudomanyos Akademia Muszaki Fizikai Kutato Intezete
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 Magyar Tudomanyos Akademia Muszaki Fizikai Kutato Intezete filed Critical Magyar Tudomanyos Akademia Muszaki Fizikai Kutato Intezete
Application granted granted Critical
Publication of DE3169917D1 publication Critical patent/DE3169917D1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/16—Acidic compositions
    • C23F1/26—Acidic compositions for etching refractory metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

1. A process for selectively dissolving molybdenum in the presence of tungsten, particularly for selectively dissolving the tungsten core-wire from tungsten spirals manufactured on a molybdenum core-wire, with an acid solution of 1 or more compound(s) having oxygen in peroxide-oxygen bond, characterized in that one carries out the dissolving with an acid solution which does not contain nitric acid in the presence of 1 or more compound(s) of 1 or more of the elements iron, copper, thallium, silver, lead, chromium, nickel, bismuth, tellurium, cerium, titanium, vanadium, manganese and cadmium as a catalyst(s) which selectively accelerates (accelerate) the dissolving of the molybdenum.
DE8181110588T 1981-12-18 1981-12-18 Method of selectively dissolving molybdenum in the presence of tungsten Expired DE3169917D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81110588A EP0082210B1 (en) 1981-12-18 1981-12-18 Method of selectively dissolving molybdenum in the presence of tungsten

Publications (1)

Publication Number Publication Date
DE3169917D1 true DE3169917D1 (en) 1985-05-15

Family

ID=8188075

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181110588T Expired DE3169917D1 (en) 1981-12-18 1981-12-18 Method of selectively dissolving molybdenum in the presence of tungsten

Country Status (3)

Country Link
EP (1) EP0082210B1 (en)
AT (1) ATE12661T1 (en)
DE (1) DE3169917D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548791A (en) * 1983-09-30 1985-10-22 American Chemical & Refining Company, Inc. Thallium-containing composition for stripping palladium
EP0138531B1 (en) * 1983-10-06 1988-01-27 Olin Corporation Process for cleaning copper base materials and regenerating the cleaning solution

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045742A (en) * 1973-08-27 1975-04-24
DE2359558C2 (en) * 1973-11-29 1975-11-13 Hitachi, Ltd., Tokio Method for preventing the formation of nitrogen monoxide when etching a molybdenum core out of a tungsten wire helix
US3945865A (en) * 1974-07-22 1976-03-23 Dart Environment And Services Company Metal dissolution process
US4174253A (en) * 1977-11-08 1979-11-13 Dart Industries Inc. Dissolution of metals utilizing a H2 O2 -H2 SO4 solution catalyzed with hydroxy substituted cycloparaffins
DE2933430A1 (en) * 1979-08-17 1981-03-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Molybdenum and mixed acid reclaimed from spent pickling soln. - esp. where soln. is used to dissolve molybdenum mandrel wires out of tungsten filaments in electric lamp industry

Also Published As

Publication number Publication date
EP0082210A1 (en) 1983-06-29
EP0082210B1 (en) 1985-04-10
ATE12661T1 (en) 1985-04-15

Similar Documents

Publication Publication Date Title
CS697788A2 (en) Method of ethylene oxide production
JPS5373488A (en) Olefin oxidation catalyst
DE3583320D1 (en) GOLD PRODUCTION FROM GOLD-CONTAINING, DIFFICULT-TO-LOCKABLE SULFIDIC MATERIALS WITH AN IRON CONTENT.
EP0503091A4 (en) Process for producing diester of carbonic acid
EP0169568A3 (en) Dimerization process and catalysts therefor
CA2120591A1 (en) Catalyst for Production of Ethylene Oxide and Process for Producing the Catalyst
FR2523971B1 (en) SILVER CATALYST ON A SUPPORT WITH AN ALKALINE PROMOTER, METHOD FOR THE PREPARATION THEREOF AND APPLICATION TO THE OXIDATION OF ETHYLENE TO ETHYLENE OXIDE
EP0138678A3 (en)
JPS5319188A (en) Olefin oxidation catalyst
JPS57167736A (en) Method of reactivating catalyst
DE3169917D1 (en) Method of selectively dissolving molybdenum in the presence of tungsten
JPS56126448A (en) Production of antimony-containing oxide catalyst
ATE25591T1 (en) PROCESSES FOR THE MANUFACTURE OR ACTIVATION OF CATALYSTS CONTAINING METAL OXIDES AND ANTIMONY.
JPS5787143A (en) Method for wire bonding
JPS5331615A (en) Production of methacrylic acid and catalyst used thereof
GB1534348A (en) Process for the preparation of acrylic and methacrylic acids and catalysts for use in this process
AU540695B2 (en) Bismuth, molybdenum, antimony containing oxidation and ammoxidation catalyst
CA2091677A1 (en) Process for refining crude material for copper or copper alloy
ATE4092T1 (en) SOLDER ALLOYS FOR DIRECT SOLDERING OF SILVER CONTACTS CONTAINING OXIDE ON CONTACT CARRIER.
SPITZER et al. THE ADSORPTION OF OXYGEN ON COPPER SURFACES--PARTS I AND II
Kaluo et al. THE SYNTHESIS AND CRYSTAL STRUCTURE OF A NOVEL TETRANUCLEAR COPPER(I) CLUSTER COMPLEX, CU 4 (ALPHA-C 10 H 7 CSS 2) 4. 1/2 CS 2
JPS5545617A (en) Preparation of methacrylic acid from isobutylene and/or t-butanol
Louzon et al. PRODUCING HIGH-STRENGTH DUCTILE CU-10 NI-8 SN ALLOY WIRE
HARLING et al. THE M. I. T. NEUTRON IRRADIATION EFFECTS PROGRAM WITH COPPER ALLOYS, CHAPTER FROM COPPER AND COPPER ALLOYS FOR FUSION REACTOR APPLICATIONS WORKSHOP
Laub Atmospheric Corrosion

Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee