Institut Francais Du Pe'trole

Pierre Baumgartner

Paul Mikitenko

Jean-Pierre Franck

Sigismond Franckowiak

Pierre Galtier

Georges Cohen

Jean-Pierre Desmarquest

Bernard Boute

Robert Aude

The invention relates to a process for hydrocarbon fractionation and extraction making it possible to obtain a petrol with an improved octane number and a kerosene with an improved smoke point. According to the invention a charge with a final boiling point of at least 220.degree. C. is fractionated into three fractions:

Process of fractionation and extraction of hydrocarbons allowing

This process for fractionating solid asphalts is operable under low temperature and pressure conditions. The process consists of treating a suspension of asphalt powder in a surfactant-containing aqueous phase by means of a hydrocarbon solvent immiscible with water and of separating:

Process for fractionating solid asphalts

The invention concerns a process and an apparatus for making a stable solution or dispersion of a hydrosoluble powder. It is characterized by the simultaneous use of a system for withdrawing powder from a vessel (2) e.g. by means of a gas (4), the dilution of the powder in a carrying gas, the driving with said carrying gas, of the obtained dilution, through a transfer duct (10), the passage of the dilution across an electrostatic field (11) and the solubilization in water of a tank (12). The invention is particularly applicable to the dispersion of polyacrylamides used in the technique of enhanced oil recovery.

Process and apparatus for making a solution or dispersion of a

Petroleum sulfonates are manufactured by reacting a hydrocarbon stock with a sulfonating agent and neutralizing the sulfonation product. The hydrocarbon stock is pretreated with hydrogen, in the presence of a NiW or NiMo catalyst, under specified conditions: its sulfur content is decreased by at least 50%, but its aromatic hydrocarbon content is decreased by not more than 35%, so that the aromatic hydrocarbons content remains at least 20% b.w. after completion of the pretreatment.

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Grenoble, France

Pierre Baumgartner