I barely remember french, but honestly, this shouldn't be that hard to translate except for whatever "acetal" refers to. @200g/mol apparently. I've paraphrased here:
To a refluxing solution of 0.005mol (1.0g) of acetal (?) in acetone (20ml), add, drop by drop, 5ml of a 1N acetone-HCl (2/3?) solution. Reflux 20min. Strip the solvent under vacuum. Dissolve the residue in ethyl acetate. Wash with saturated sodium carbonate solution, then with water. Filter (I think...not too sure), concentrate the solution, and run chromatograpy with an 80/20 mix of hexane/ethyl acetate. A white solid was recovered which was recrystallized from a mixture of chloroform and hexane. The end looks like mainly analytical results.