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Patent Searching and Data


Title:
GAS MIXTURE FOR THERMO-CHEMICAL TREATMENT OF METALS AND ALLOYS AND METHOD OF OBTAINING IT
Document Type and Number:
WIPO Patent Application WO/1991/002695
Kind Code:
A1
Abstract:
A gas mixture for thermo-chemical treatment of metals and alloys comprising the following components at the following ratio in per cent by weight: carbon oxide 50.0-61.5, hydrogen 38.5-50.0. A method for obtaining said mixture by conversion of saturated hydrocarbons containing one to four carbon atoms by carbon dioxide in the presence of a nickel containing catalyst heated up to a temperature of 1 123-1 373 K in a quantity of 1 to 4 parts of the volume of said hydrocarbons. A device for obtaining the mixture comprises a retort (1) with the catalyst (2) mounted coaxially in a casing (3) with an annular gap (4) and connected through its inlet pipe (7) to a mixer (8). The outlet pipe (9) of the retort (1) is connected to the consumer. In the annular gap (4) are located heating elements (5, 6) connected to a current source and having, each, a power decreasing along the thickness of the layer of catalyst (2) and along the gas path. The mixer (8) is connected to a recipient (12) with carbon dioxide.

Inventors:
VASILIEV SERGEI ZINOVIEVICH (SU)
TELNJUK JURY NIKOLAEVICH (SU)
MAERGOIZ IOSIF IZRAILEVICH (SU)
Application Number:
PCT/SU1989/000220
Publication Date:
March 07, 1991
Filing Date:
August 18, 1989
Export Citation:
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Assignee:
VNI P KONST (SU)
International Classes:
C01B3/00; C01B3/38; C21D1/76; C23C8/20; C23C8/30; (IPC1-7): C01B3/38; C21D1/74; C23C8/20
Foreign References:
SU680634A31979-08-15
SU833469A11981-05-30
SU184281A1
US4191598A1980-03-04
PL138427B
SU476339A11975-07-05
FR2527641A11983-12-02
Other References:
METALLURGIA, (Moscow), 1984, P.A. PROSHKIN, "Khimiko-Termicheskaya Abrabotka Metallov-Karbonitratsia", pages 214-216.
REFERATIVNY ZHURNAL, "Metallurgia", No. 8, 1977, (VINITI, Moscow), Ref. 8 I963, SIMIDZU DZJUGO, "Regulirovanie Atmosfery v Pechakh Dlya Termoobrabotki Metallov"; & KAISO, "Instrumentation", 1977, 20, No. 2, 70-73 (Jap.).
REFERATIVNY ZHURNAL, "Tekhnologia Mashinostroenia", No. 6, 1980, (VINITI, Moscow), Ref 5 B241, "Opredelenie Optimalnoi Tekhnologii Termicheskoi Obrabotki Stalei"; & DUMITRESCU R., "Bul. Univ. BRASOV", 1978, (1979), A, 20-C, 195-202 (Rum).
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