| 摘要 |
<p><PICT:0815531/III/1> The subject-matter of this Specification is substantially the same as that described in Specification 815,530, but the claims relate to the division of the reaction tubes into groups each arranged in its own heating chamber. The is illustrated in Fig. 1, in which the ceramic tubes 15 are suspended in combustion chambers 12 and 13, fired by burners 16-19 and provided with offtakes 111, 112 leading to recuperators 113-116 in which the combustion air is preheated. Associated with these recuperators are draught regulators 117-120. The furnace may be applied to the production of hydrocyanic acid from methane and ammonia using platinum group catalysts.</p> |
