(under subclass 266) Processes wherein mineral oil is separated into two or more fractions at least one of which is subjected to a sulfuric acid refining treatment combined with reblending of the mineral oil fractions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
218, for processes of desulfurization of mineral oils including separating the oil into fractions at least one of which is treated to remove sulfur.
272, for processes whereby mineral oil is fractionated and then at least one fraction is subjected to a sulfuric acid refining treatment, there being no reblending of the fractions.
