ZA898876B - Process for producing a heat treatment atmosphere by separation of air by permeation - Google Patents

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

Info

Publication number
ZA898876B
ZA898876B ZA898876A ZA898876A ZA898876B ZA 898876 B ZA898876 B ZA 898876B ZA 898876 A ZA898876 A ZA 898876A ZA 898876 A ZA898876 A ZA 898876A ZA 898876 B ZA898876 B ZA 898876B
Authority
ZA
South Africa
Prior art keywords
copper
water vapour
residual oxygen
stream
catalytic reaction
Prior art date
Application number
ZA898876A
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=9372192&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA898876(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 ZA898876B publication Critical patent/ZA898876B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • 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
    • C01B2210/001—Physical processing by making use of membranes
    • 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)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Powder Metallurgy (AREA)
  • Catalysts (AREA)

Abstract

The invention relates to a process for creating an atmosphere for the heat treatment of metals, the atmosphere being produced by introducing a stream of gaseous nitrogen, according to which there is first formed, by air separation by means of selective permeation, a crude gaseous nitrogen stream having a residual oxygen content, to which is added a stream of hydrogen which is at least sufficient to remove most of the residual oxygen by catalytic reaction to form water vapour, characterised by the combined implementation of the following measures: a) the air separation by selective permeation is carried out in such a way that the gaseous nitrogen stream has a residual oxygen content of between 0.5% and 3%; b) the catalytic reaction to form water vapour is brought about exclusively with catalysts which are used without 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 1% and 6%, relative to the nitrogen stream, being created. Exclusive application to the annealing or brazing of copper, the decarburising and nitriding annealing of steels, and the sintering of copper, nickel and copper-nickel alloys where appropriate with lead, and copper-zinc alloys.
ZA898876A 1988-11-24 1989-11-21 Process for producing a heat treatment atmosphere by separation of air by permeation ZA898876B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8815323A FR2639250B1 (en) 1988-11-24 1988-11-24

Publications (1)

Publication Number Publication Date
ZA898876B true ZA898876B (en) 1990-09-26

Family

ID=9372192

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA898876A ZA898876B (en) 1988-11-24 1989-11-21 Process for producing a heat treatment atmosphere by separation of air by permeation

Country Status (10)

Country Link
EP (1) EP0375477B1 (en)
JP (1) JPH07112925B2 (en)
AT (1) ATE108752T1 (en)
AU (1) AU630640B2 (en)
CA (1) CA2003473A1 (en)
DE (1) DE68916925T2 (en)
ES (1) ES2057166T3 (en)
FR (1) FR2639250B1 (en)
PT (1) PT92409B (en)
ZA (1) ZA898876B (en)

Families Citing this family (12)

* 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
FR2668584B1 (en) * 1990-10-26 1994-03-18 Lair Liquide PROCESS FOR DEVELOPING A HEAT TREATMENT ATMOSPHERE AND HEAT TREATMENT PLANT.
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
KR0154549B1 (en) * 1992-11-17 1998-11-16 조안 엠. 젤사 Oxygen removal from partially purified 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
JP5852422B2 (en) * 2011-11-26 2016-02-03 国立研究開発法人農業環境技術研究所 Purification method of ultra-high purity nitrogen gas

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535074A (en) * 1965-10-29 1970-10-20 Hitachi Ltd Method and apparatus for purifying crude inert gases
JPH0230127B2 (en) * 1981-09-30 1990-07-04 Showa Electric Wire & Cable Co SUIMITSUDENSENNOSEIZOHO
FR2586259B1 (en) * 1985-08-14 1987-10-30 Air Liquide QUICK CEMENTATION PROCESS IN A CONTINUOUS OVEN
JPS6291408A (en) * 1985-10-16 1987-04-25 Mitsubishi Heavy Ind Ltd Method for dioxidizing oxygen-containing gaseous nitrogen

Also Published As

Publication number Publication date
DE68916925T2 (en) 1994-11-03
EP0375477A1 (en) 1990-06-27
DE68916925D1 (en) 1994-08-25
JPH02225303A (en) 1990-09-07
ATE108752T1 (en) 1994-08-15
ES2057166T3 (en) 1994-10-16
JPH07112925B2 (en) 1995-12-06
AU630640B2 (en) 1992-11-05
CA2003473A1 (en) 1990-05-24
AU4556289A (en) 1990-05-31
FR2639250A1 (en) 1990-05-25
FR2639250B1 (en) 1990-12-28
PT92409A (en) 1990-05-31
PT92409B (en) 1995-08-09
EP0375477B1 (en) 1994-07-20

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