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AssigneeIndian Oil Corporation Limited
InventorsAlex Cheru Pulikottil, Manoranjan Santra, Hillol Biswas, Mani Karthikeyan, Dharmendra Kumar Yadav, Ram Prakash Verma
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A process for the preparation of hydrotreating catalyst which comprises of a Group VIB metal and Group VIII metal on an active composite carrier for the removal of sulfur from gas oil feed stocks, wherein the said carrier comprises of a phosphated alumina and an ultra stable Y zeolite and the metal components mostly reside on the alumina, said process comprising the steps of impregnation of chelated metal complex preferentially on to the alumina component of the composite support and subjecting the composite catalyst to a high-speed ball milling. The catalyst obtained by the process of the present invention consists of the active metals in the nanoparticle range (less than 50 Å) while also retaining the zeolite properties of the composite carrier and the catalyst produces less than 50 ppm sulfur from gas oil feed stocks containing greater than 1 wt % sulfur under typical commercial operating conditions.
A process for preparing a hydrotreating catalyst composition comprising a composite carrier having an alumina part and a zeolite part wherein active metal belonging to group VIB of the periodic table and active metal belonging to Group VIII of the periodic table, each having a particle size less than about 50 Å are being preferentially supported on the alumina part of the composite carrier, and useful for desulfurization of gas oils, said process comprising the steps of:
Dependencies are inferred from the claim text.