Method of making a synthetic petroleum sulfonate

Details Method of making a synthetic petroleum sulfonate Method of making a synthetic petroleum sulfonate

2005-12-21

2008-11-11

O'Sullivan, Peter G (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

C562S033000

Reexamination Certificate

active

07449596

ABSTRACT:
A process for preparing a synthetic petroleum sulfonate comprising (a) reacting at least one aromatic compound with a mixture of olefins selected from olefins having from about 8 to about 100 carbon atoms, in the presence of an acidic ionic liquid catalyst, wherein the resulting product comprises at least about 50 weight percent of a 1,2,4 tri-substituted aromatic compound or a 1,2,3 tri-substituted aromatic compound or mixtures thereof; (b) reacting the product of (a) with sulfur trioxide, which has been diluted with air; and (c) neutralizing the product of (b) with an alkali or alkaline earth metal hydroxide.

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