Preparation of aromatic polysulfonic acid compositions from...

Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic sulfur compound – wherein the sulfur is single bonded...

Reexamination Certificate

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C562S033000, C562S089000, C562S090000

Reexamination Certificate

active

07732387

ABSTRACT:
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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