A method for the preparation of a stream rich in aromatic polysulfonic acid compounds from light catalytic cycle oil. The preparation involves the polysulfonation of the light catalytic cycle oil using more than a stoichiometric amount of sulfuric acid. The aromatic polysulfonic acid compositions are preferably aromatic polynuclear compositions.

 
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< Oxidatively regenerable adsorbents for sulfur removal

< Epitaxial layer structures and precursors for topotactic anion exchange oxide films

> Method and system of heating a fluid catalytic cracking unit having a regenerator and a reactor

> Method and system of heating a fluid catalytic cracking unit for overall CO.sub.2 reduction
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