Societe Chimique De La Grande Paroisse, Azote Et Produits Chimiques

Alfred Normand

A generator for producing an atmosphere of nitrogen containing hydrogen by racking ammonia and recycling a previously generated atmosphere that already had been used. The atmosphere generated by cracking, and the recovered atmosphere that previously had been used, are subjected in a reactor to a catalytic treatment at a temperature between 0.degree. and 600.degree. C. and then, after passing through a refrigeration arrangement, the resultant atmosphere is prepared for use. As one example the atmosphere is adapted to be used as a protective atmosphere for metallurgical heat-treating furnaces.

Apparatus for generating a reducing atmosphere for heat-treating

An atmosphere of nitrogen containing hydrogen is generated by cracking amia and recycling a previously generated atmosphere that already had been used. The atmosphere generated by cracking, and the recovered atmosphere that previously had been used, are subjected in a reactor to a catalytic treatment at a temperature between 0.degree. to 600.degree. C and then, after passing through a refrigeration arrangement, the resultant atmosphere is prepared for use. As one example, the atmosphere is adapted to be used as a protective atmosphere for metallurgical heat-treating furnaces.

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Paris, France

Alfred Normand