[go: up one dir, main page]

EP0144868A3 - Process for manufacturing fine metallic chromium powder with a low oxygen content - Google Patents

Process for manufacturing fine metallic chromium powder with a low oxygen content Download PDF

Info

Publication number
EP0144868A3
EP0144868A3 EP84114148A EP84114148A EP0144868A3 EP 0144868 A3 EP0144868 A3 EP 0144868A3 EP 84114148 A EP84114148 A EP 84114148A EP 84114148 A EP84114148 A EP 84114148A EP 0144868 A3 EP0144868 A3 EP 0144868A3
Authority
EP
European Patent Office
Prior art keywords
oxygen content
low oxygen
chromium powder
metallic chromium
fine metallic
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.)
Granted
Application number
EP84114148A
Other languages
German (de)
Other versions
EP0144868B1 (en
EP0144868A2 (en
Inventor
Horst Eggert
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.)
Evonik Operations GmbH
Original Assignee
TH Goldschmidt 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 TH Goldschmidt AG filed Critical TH Goldschmidt AG
Publication of EP0144868A2 publication Critical patent/EP0144868A2/en
Publication of EP0144868A3 publication Critical patent/EP0144868A3/en
Application granted granted Critical
Publication of EP0144868B1 publication Critical patent/EP0144868B1/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
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/32—Obtaining chromium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
EP84114148A 1983-12-06 1984-11-23 Process for manufacturing fine metallic chromium powder with a low oxygen content Expired EP0144868B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3343989 1983-12-06
DE3343989A DE3343989C1 (en) 1983-12-06 1983-12-06 Process for the production of fine-particle, low-oxygen chrome metal powder

Publications (3)

Publication Number Publication Date
EP0144868A2 EP0144868A2 (en) 1985-06-19
EP0144868A3 true EP0144868A3 (en) 1987-09-16
EP0144868B1 EP0144868B1 (en) 1989-01-25

Family

ID=6216121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114148A Expired EP0144868B1 (en) 1983-12-06 1984-11-23 Process for manufacturing fine metallic chromium powder with a low oxygen content

Country Status (3)

Country Link
US (1) US4767454A (en)
EP (1) EP0144868B1 (en)
DE (2) DE3343989C1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111922351B (en) * 2020-09-23 2021-01-01 西安斯瑞先进铜合金科技有限公司 Preparation method of high-purity low-oxygen metal chromium powder
CN111922350B (en) * 2020-09-22 2021-01-01 西安斯瑞先进铜合金科技有限公司 Preparation method of low-hydrochloric-acid-insoluble metal chromium powder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354354A (en) * 1991-10-22 1994-10-11 Th. Goldschmidt Ag Method for producing single-phase, incongruently melting intermetallic phases
US20090162273A1 (en) * 2007-12-21 2009-06-25 Howmedica Osteonics Corp. Chromium oxide powder having a reduced level of hexavalent chromium and a method of making the powder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB336970A (en) * 1929-07-22 1930-10-22 Ig Farbenindustrie Ag Improvements in or relating to the working up of chromium ores
GB507362A (en) * 1938-03-29 1939-06-14 Walter Hene Improvements in and relating to the treatment of chromium ores
GB545965A (en) * 1939-11-16 1942-06-22 Marvin J Udy Chromium recovery
EP0039791A1 (en) * 1980-05-09 1981-11-18 Th. Goldschmidt AG Method of producing sinterable titanium base alloy powder

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE935456C (en) * 1938-08-26 1955-11-17 Hartmetallwerkzeugfabrik Meuts Process for the production of alloy powders
US2332415A (en) * 1940-08-15 1943-10-19 Marvin J Udy Chromium recovery
US2854327A (en) * 1954-02-12 1958-09-30 Diamond Alkali Co Exothermic chromium compound containing composition and method of making same
US2889218A (en) * 1956-04-30 1959-06-02 Transition Metals & Chemicals Continuous process for metallothermic reactions
US3053649A (en) * 1957-04-02 1962-09-11 Onera (Off Nat Aerospatiale) Methods for the obtainment of articles of chromium or containing chromium and in articles obtained by these methods
US3623861A (en) * 1969-08-28 1971-11-30 Nasa Production of metal powders
JPS5877548A (en) * 1981-10-31 1983-05-10 Kawasaki Steel Corp Melt reducing method for chrome ore

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB336970A (en) * 1929-07-22 1930-10-22 Ig Farbenindustrie Ag Improvements in or relating to the working up of chromium ores
GB507362A (en) * 1938-03-29 1939-06-14 Walter Hene Improvements in and relating to the treatment of chromium ores
GB545965A (en) * 1939-11-16 1942-06-22 Marvin J Udy Chromium recovery
EP0039791A1 (en) * 1980-05-09 1981-11-18 Th. Goldschmidt AG Method of producing sinterable titanium base alloy powder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111922350B (en) * 2020-09-22 2021-01-01 西安斯瑞先进铜合金科技有限公司 Preparation method of low-hydrochloric-acid-insoluble metal chromium powder
CN111922351B (en) * 2020-09-23 2021-01-01 西安斯瑞先进铜合金科技有限公司 Preparation method of high-purity low-oxygen metal chromium powder

Also Published As

Publication number Publication date
EP0144868B1 (en) 1989-01-25
EP0144868A2 (en) 1985-06-19
DE3343989C1 (en) 1984-12-13
DE3476347D1 (en) 1989-03-02
US4767454A (en) 1988-08-30

Similar Documents

Publication Publication Date Title
GB2168967B (en) Process for producing metal oxide particles having a very small and uniform size
DE3176202D1 (en) Porous ptfe articles and a process for their manufacture
EP0177772A3 (en) Processes for fabricating a sintered powdered metal component
EP0206575A3 (en) Process for making fine powders
ZA81377B (en) A process for the manufacture of a metallic sintered shaped part and a machine suitable to perform the process
GB2080783B (en) Process for producing ferromagnetic metallic particles
DE3368043D1 (en) A method for producing fine spinel powders
DE3361080D1 (en) A process for the production of sintered spheres
DE3173421D1 (en) Process for producing sintered ferrous alloys
DE3369988D1 (en) Fluoroepoxides and a process for production thereof
DE3569248D1 (en) Process for making tetrafluoroethylene fine powder resins
GB1544603A (en) Process for producing an iron-based metallic powder with a low oxygen content
YU44513B (en) Process for producing methylmercaptane from carbon oxides
DE3467984D1 (en) Process for manufacturing amorphous alloy powders
AU548794B2 (en) Process for producing cobalt containing ferromagnetic iron oxides
DE3165316D1 (en) 2-substituted-5-trifluoromethylpyridines and a process for producing the same
GB8511229D0 (en) Producing briquette material
GB2117417B (en) Producing high-purity ceramics-free metallic powders
DE3476347D1 (en) Process for manufacturing fine metallic chromium powder with a low oxygen content
HK87788A (en) Metal-coated paper and process for its manufacture
ZA815530B (en) A process for making cobalt metal powder
EP0151185A4 (en) Tin-containing iron powder and process for its production.
AU557757B2 (en) Producing granular ferrous sulphate
EP0154285A3 (en) Process for producing ferromagnetic metal powder
DE3477660D1 (en) Process for manufacturing glasslike carbon material

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19841128

AK Designated contracting states

Designated state(s): DE FR GB

RTI1 Title (correction)
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19880720

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3476347

Country of ref document: DE

Date of ref document: 19890302

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19951109

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19951115

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19951128

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19961123

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19961123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST