A method for presulfurization of coal water fabric treatment of catalysts.

摘要

The invention relates to a method, making it possible, when a catalyst, in particular of refining is subjected as soon as its start-up, preferably on the site ("in situ") to the conventional reaction for activating in the presence of hydrogen (generally at - above 100 degrees c.), then, by virtue of the presence of hydrogen on the site, the sulfuration the level required, a stoichiometric or not stoichiometric, or of active metals contained in the composition of the catalyst, the method consists in incorporating in the absence of hydrogen in the porosity of the new or regenerated catalyst, at least one sulphurizing agent of general formula: & br / (see appended drawing in bopi) & br / & & br / where n is an integer from 3 to 20, where r represents an organic radical. & br / to the invention is characterized in that it is added to the sulphurizing agent a critical amount of elemental sulphur. This addition makes it possible to adjust the sulphur content of the catalyst presulphurized with the values greater than or equal to the stoichiometry, to increase the quantity of fixed sulphur, after activation under hydrogen and to reduce the phenomena of heat release observed during the activation.