| 摘要 |
1. A process for determining the composition of a hydrocarbon mixture from the boiling temperature of its constituents, comprising an evaporation step and a pyrolysis step in inert atmosphere, characterized by the following operations of : a) impregnating a stable, inert and porous matrix with said hydrocarbons in a proportion by weight from 0.01 to 1 mg of hydrocarbons per milligram of matrix, b) heating the so-impregnated matrix at a progressively increasing temperature under a flow of inert atmosphere up to a temperature theta 3 ranging from 500 to 600 degrees C, so as to achieve, during said temperature increase, an evaporation step and a pyrolysis step on at least a portion of said hydrocarbons, thus producing an evaporation effluent, a pyrolysis effluent and a residue, c) measuring, during said heating step on said effluents, by means of a hydrocarbon detector, at least two signals Q1 ... Qn representative of a hydrocarbon amount, said signals corresponding to at least two successive defined time intervals of said heating step, d) converting said time intervals to boiling temperature interval, and e) determining the composition of hydrocarbon mixture from signals Q1 ... Qn and boiling temperature intervals.
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