Process for preparing high molecular weight sulfonic acids
Abstract
Abstract THIS DISCLOSURE CONCERNS A PROCESS FOR PREPARING HIGHPURITY HIGH MOLECULAR WEIGHT SULFONIC ACIDS FROM A PETROLEUM FRACTION (E.G., BRIGHT STOCK). BRIEFLY, THE PROCESS COMPRISES THE STEPS OF: (1) SULFONATING THE PETROLEUM FRACTION, (2) ADDING TO THE SULFONATION MASS, WATER AND A VOLATILE HYDROCARBON SOLVENT (E.G., HEXANE), (3) ALLOWING THE ADMIXTURE TO SETTLE, (4) WITHDRAWING THE AQUEOUS LAYER, AND (5) THEREUPON OBTAINING A SOLUTION OF THE SULFONIC ACIDS. A SALIENT FEATURE OF THE PROCESS IS THE USE OF BOTH WATER AND THE VOLATILE HYDROCARBON SOLVENT. IF DESIRED, IN ORDER TO REDUCE SETTLING TIME, A LOW MOLECULAR WEIGHT SULFONIC ACID CAN BE ADDED TO THE ADMIXTURE OF SULFONATION MASS, WATER AND VOLATILE HYDROCARBON SOLVENT. THE LOW MOLECULAR WEIGHT SULFONIC ACID CAN BE FORMED IS SITU BY INCLUDING A SUITABLE SULFONATABLE HYDROCARBON IN THE PETROLEUM FRACTION SUBJECTED TO SULFONATION.
Inventors
- 👤 P Kemp
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