Dissolution of Support and Solvent Extraction

Several solvents have been used to obtain information regarding coke functionality, according to the solubility in a given solvent. An elution scheme has been proposed using 8 different solvents, as indicated in Table 3 . Alfonso et aF used a sequential solvent extraction procedure, using n-hexane, chloroform and toluene, to study coke composition on a Pt-Sn dehydrogenation catalyst. 

5 Diethyl ether-ethanol (97 3) Basic nitrogenated heterocycles 

8 Pyridine-ethanol Molecules with a high content of N and O 

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