GB646631A - Improvements in and relating to the catalytic oxidation of ammonia to oxides of nitrogen - Google Patents

Improvements in and relating to the catalytic oxidation of ammonia to oxides of nitrogen

Info

Publication number
GB646631A
GB646631A GB21990/44A GB2199044A GB646631A GB 646631 A GB646631 A GB 646631A GB 21990/44 A GB21990/44 A GB 21990/44A GB 2199044 A GB2199044 A GB 2199044A GB 646631 A GB646631 A GB 646631A
Authority
GB
United Kingdom
Prior art keywords
oxides
alloy
ammonia
per cent
group
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
GB21990/44A
Inventor
Colin James Smithells
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.)
BAKER PLATINUM Ltd
Original Assignee
BAKER PLATINUM Ltd
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 BAKER PLATINUM Ltd filed Critical BAKER PLATINUM Ltd
Priority to GB21990/44A priority Critical patent/GB646631A/en
Priority to US624595A priority patent/US2467446A/en
Publication of GB646631A publication Critical patent/GB646631A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/24—Nitric oxide (NO)
    • C01B21/26—Preparation by catalytic or non-catalytic oxidation of ammonia

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A catalyst for the oxidation of ammonia comprises platinum or an alloy thereof, particularly a platinum-rhodium alloy, and is prepared by sintering a finely-divided mixture of the metal or alloy and one or more oxides which are stable under the sintering conditions, which may involve the pressure of a reducing gas. Alloys containing up to 10 per cent of rhodium are suitable, and the proportion of oxide may be from 0.01 to 10 per cent. Specified examples of oxides are those of (1) thorium; (2) one or more of calcium, strontium, barium, magnesium and beryllium; (3) one or more of zirconium, hafnium, cerium, and titanium; (4) aluminium; (5) one or more rare earth metals; (6) one or more metals of the fifth group; and (7) chromium sesquioxide. The composted and sintered agglomerate is formed into wire, sheet, gauze, &c. Specifications 306,382, [Class 1 (i)], 578,956, 645,541, 645,681, 645,682, 646,002, 646,003 and 646,004, [all in Group II], are referred to.
GB21990/44A 1944-11-08 1944-11-08 Improvements in and relating to the catalytic oxidation of ammonia to oxides of nitrogen Expired GB646631A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB21990/44A GB646631A (en) 1944-11-08 1944-11-08 Improvements in and relating to the catalytic oxidation of ammonia to oxides of nitrogen
US624595A US2467446A (en) 1944-11-08 1945-10-25 Catalytic oxidation of ammonia to oxides of nitrogen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21990/44A GB646631A (en) 1944-11-08 1944-11-08 Improvements in and relating to the catalytic oxidation of ammonia to oxides of nitrogen

Publications (1)

Publication Number Publication Date
GB646631A true GB646631A (en) 1950-11-29

Family

ID=10172141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21990/44A Expired GB646631A (en) 1944-11-08 1944-11-08 Improvements in and relating to the catalytic oxidation of ammonia to oxides of nitrogen

Country Status (2)

Country Link
US (1) US2467446A (en)
GB (1) GB646631A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451769A (en) * 1965-11-24 1969-06-24 Kawasaki Steel Co Method of producing ammonium salts and iron oxide from waste pickle liquor
US3926853A (en) * 1970-02-09 1975-12-16 Azote & Prod Chim Catalytic oxidation of ammonia
US3947554A (en) * 1970-02-09 1976-03-30 Societe Chimique De La Grande Paroisse Et Produits Chemiques Catalytic oxidation of ammonia
FR2222308B1 (en) * 1973-03-20 1975-10-31 Rhone Progil
US3904371A (en) * 1974-03-04 1975-09-09 Beckman Instruments Inc Chemiluminescent ammonia detection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706055A (en) * 1928-02-18 1929-03-19 Du Pont Process of oxidizing ammonia
US2004141A (en) * 1933-07-22 1935-06-11 Du Pont Process for the oxidation of ammonia and improved catalyst therefor
US2076953A (en) * 1933-12-07 1937-04-13 Du Pont Manufacture of hydrocyanic acid
US2167708A (en) * 1936-09-25 1939-08-01 Du Pont Process of oxidizing ammonia
DE838067C (en) * 1942-02-07 1952-03-27 Baker Platinum Limited, London Sintered platinum alloy

Also Published As

Publication number Publication date
US2467446A (en) 1949-04-19

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