ZA898875B - Process for producing a heat treatment atmosphere by separation of air by adsorption - Google Patents

Process for producing a heat treatment atmosphere by separation of air by adsorption

Info

Publication number
ZA898875B
ZA898875B ZA898875A ZA898875A ZA898875B ZA 898875 B ZA898875 B ZA 898875B ZA 898875 A ZA898875 A ZA 898875A ZA 898875 A ZA898875 A ZA 898875A ZA 898875 B ZA898875 B ZA 898875B
Authority
ZA
South Africa
Prior art keywords
copper
water vapour
residual oxygen
nitrogen stream
stream
Prior art date
Application number
ZA898875A
Inventor
Eric Duchateau
Duchateau Eric
Philippe Queille
Queille Philippe
Original Assignee
Air Liquide
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9372193&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA898875(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Air Liquide filed Critical Air Liquide
Publication of ZA898875B publication Critical patent/ZA898875B/en

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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/04—Purification or separation of nitrogen
    • C01B21/0405—Purification or separation processes
    • C01B21/0494—Combined chemical and physical processing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • C21D1/763—Adjusting the composition of the atmosphere using a catalyst
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0001—Separation or purification processing
    • C01B2210/0003—Chemical processing
    • C01B2210/0006—Chemical processing by reduction
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0001—Separation or purification processing
    • C01B2210/0009—Physical processing
    • C01B2210/0014—Physical processing by adsorption in solids
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0045—Oxygen
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/20—Capture or disposal of greenhouse gases of methane

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Catalysts (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

The invention relates to a process for producing an atmosphere for thermal treatment of metals, formed by providing a gaseous nitrogen stream, according to which a crude gaseous nitrogen stream having a residual oxygen content is first formed by air separation by selective adsorption, to which stream is added a stream of hydrogen at least sufficient to remove, by water vapour formation by catalytic reaction, the essential part of the residual oxygen, characterised in that the following measures are employed in combination: a) the air separation by selective adsorption is carried out so that the gaseous nitrogen stream has a residual oxygen content of between 0.1% and 3%; b) the catalytic reaction to form water vapour is brought about exclusively with catalysts whose use does not involve external application of heat and c) the catalytic reaction to form water vapour is carried out in such a way that the residual oxygen content is less than 30 vpm, with a water vapour content of between 0.2% and 6%, relative to the nitrogen stream, being set up. Exclusive application to the annealing or brazing of copper, decarburising annealing of steels, nitriding of steels, and sintering of copper, nickel, copper-nickel alloys, where appropriate with lead, and copper-zinc alloy.
ZA898875A 1988-11-24 1989-11-21 Process for producing a heat treatment atmosphere by separation of air by adsorption ZA898875B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8815324A FR2639252B1 (en) 1988-11-24 1988-11-24

Publications (1)

Publication Number Publication Date
ZA898875B true ZA898875B (en) 1990-09-26

Family

ID=9372193

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA898875A ZA898875B (en) 1988-11-24 1989-11-21 Process for producing a heat treatment atmosphere by separation of air by adsorption

Country Status (10)

Country Link
EP (1) EP0370872B1 (en)
JP (1) JP2698674B2 (en)
AT (1) ATE109115T1 (en)
AU (1) AU630639B2 (en)
CA (1) CA2003472A1 (en)
DE (1) DE68917093T2 (en)
ES (1) ES2058581T3 (en)
FR (1) FR2639252B1 (en)
PT (1) PT92407B (en)
ZA (1) ZA898875B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8914366D0 (en) * 1989-06-22 1989-08-09 Boc Group Plc Heat treatment of metals
US5259893A (en) * 1991-07-08 1993-11-09 Air Products And Chemicals, Inc. In-situ generation of heat treating atmospheres using a mixture of non-cryogenically produced nitrogen and a hydrocarbon gas
US5221369A (en) * 1991-07-08 1993-06-22 Air Products And Chemicals, Inc. In-situ generation of heat treating atmospheres using non-cryogenically produced nitrogen
US5322676A (en) * 1992-12-22 1994-06-21 Air Products And Chemicals, Inc. Process for producing furnace atmospheres using noncryogenically generated nitrogen
US5320818A (en) * 1992-12-22 1994-06-14 Air Products And Chemicals, Inc. Deoxygenation of non-cryogenically produced nitrogen with a hydrocarbon
US5417774A (en) * 1992-12-22 1995-05-23 Air Products And Chemicals, Inc. Heat treating atmospheres
US5284526A (en) * 1992-12-22 1994-02-08 Air Products And Chemicals, Inc. Integrated process for producing atmospheres suitable for heat treating from non-cryogenically generated nitrogen
US5290480A (en) * 1992-12-22 1994-03-01 Air Products And Chemicals, Inc. Process for producing furnace atmospheres by deoxygenating non-cryogenically generated nitrogen with dissociated ammonia
US5348592A (en) * 1993-02-01 1994-09-20 Air Products And Chemicals, Inc. Method of producing nitrogen-hydrogen atmospheres for metals processing
US7981195B2 (en) 2007-11-09 2011-07-19 Praxair Technology, Inc. System for preventing contaminants from reaching a gas purifier
JP5470011B2 (en) * 2009-11-27 2014-04-16 株式会社ブリヂストン Inert gas production method and tire production method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2844167C2 (en) * 1978-10-10 1984-07-26 Fa. J. Aichelin, 7015 Korntal Process for generating a nitrogen protective gas atmosphere in a furnace chamber and protective gas industrial furnace for carrying out this process
FR2446322A2 (en) * 1979-01-15 1980-08-08 Air Liquide METHOD FOR HEAT TREATMENT OF STEEL AND CONTROL OF SAID TREATMENT
DE3137569A1 (en) * 1981-09-22 1983-04-21 Leybold-Heraeus GmbH, 5000 Köln METHOD AND DEVICE FOR PRODUCING HIGH PURITY NITROGEN
JPS6291408A (en) * 1985-10-16 1987-04-25 Mitsubishi Heavy Ind Ltd Method for dioxidizing oxygen-containing gaseous nitrogen
GB8620686D0 (en) * 1986-08-27 1986-10-08 Ici Plc Nitrogen production
JPH01303437A (en) * 1988-06-01 1989-12-07 Fuji Photo Film Co Ltd Silver halide color photographic sensitive material

Also Published As

Publication number Publication date
JP2698674B2 (en) 1998-01-19
EP0370872B1 (en) 1994-07-27
AU4556189A (en) 1990-05-31
JPH02227133A (en) 1990-09-10
PT92407A (en) 1990-05-31
PT92407B (en) 1995-08-09
DE68917093D1 (en) 1994-09-01
ES2058581T3 (en) 1994-11-01
AU630639B2 (en) 1992-11-05
FR2639252A1 (en) 1990-05-25
FR2639252B1 (en) 1990-12-28
ATE109115T1 (en) 1994-08-15
DE68917093T2 (en) 1994-11-10
CA2003472A1 (en) 1990-05-24
EP0370872A1 (en) 1990-05-30

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