| 摘要 |
In cracking hydrocarbons to acetylene and ethylene by contact with hydrogen heated in an electric arc the hydrocarbon is introduced in vapour form first radially in the form of a cone-shaped shell the apex of which points in the direction of flow of hydrogen and second, immediately following the first injection, tangetially, The hydrogen is heated by the application of 2-7 kw.hr. per cubic metre to the arc. Hydrocarbon is introduced at 20-400 m./sec. in the first injection such that the apex angle of the cone is at least 90 degrees and in the second injection at 100-250 m./sec.
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