An improved method of presulfiding a hydrotreating or hydrocracking catalyst which minimizes sulfur stripping upon start-up of a hydrotreating or hydrocracking reactor utilizing such a catalyst. The method comprises the steps of contacting a hydrotreating or hydrocracking catalyst with elemental sulfur at a temperature below the melting point of sulfur, thereby forming a sulfur-catalyst mixture, and heating the sulfur-catalyst mixture to a temperature above the melting point of sulfur. Preferably, the sulfur-catalyst mixture is first mixed with at least one member selected from the group consisting of high boiling oils and hydrocarbon solvents to form a prewet mixture prior to heating at a temperature above the melting point of sulfur. Tail gas treating catalysts are also presulfided by these methods.

A method of presulfiding a hydrotreating hydrocracking or tail gas treating catalyst

The invention pertains to a process for activating a hydrotreating catalyst comprising a Group VIII hydrogenation metal oxide and a Group VI hydrogenation metal oxide on a carrier in which the hydrotreating catalyst is contacted with an additive which is at least one compound selected from the group of compounds comprising at least two hydroxyl groups and 2-10 carbon atoms, and the (poly)ethers of these compounds, after which the catalyst is dried under such conditions that at least 50 % of the additive remains in the catalyst. The additive, is preferably at least one compound selected from ethylene glycol, diethylene glycol, and polyethylene glycol, or a saccharide or polysaccharide. The invention additionally pertains to the catalyst obtainable by this process, which shows high activity in hydrodesulphurisation and hydrodenitrogenation reactions, and to the use of the catalyst in hydrotreating.

Hydrotreating catalyst: composition, preparation, and use thereof

Disclosed is a process for the ex situ presulfidation of hydrotreating catalysts employing organic sulfur compounds with a boiling point exceeding 100° C. and satisfying the formula X--R.sup.1 (S--R.sup.2).sub.p S--R.sup.3 --Y (I) wherein p=0, 1 or 2, R 1 , R 2 , and R 3 may be the same or different and represent alkylene groups having 1-4 carbon atoms, X and Y may be the same or different and have the meaning of --H, --OH, --OR 4 4 or --C(O)OR 5 , wherein R 4 has the meaning of an alkyl group or acyl group with 1-3 carbon atoms, and R 5 has the meaning of --H, an ammonium group or an alkyl group with 1-3 carbon atoms. Also disclosed is a process for activating the thus presulfided catalyst.

Process for the preparation of a presulfided and sulfided catalyst

For the impregnation into the pores of a hydrocarbon treatment catalyst of a sulfurizing agent chosen from element sulfur and organic polysulfides with the aid of a solvent, the impregnation process totally or partially comprises a constituent of the olefin or olefin fraction type, e.g., of the vegetable oil type, or a similar constituent. The use of such a constituent makes it possible to significantly reduce the exothermal effect which occurs during presulfurization, compared with the exothermal effects obtained without using such a constituent.

Process for the presulfurization of hydrocarbon treatment catalysts

The present invention pertains to a process for sulphiding a catalyst composition comprising at least one hydrogenation metal component of Group VI and/or Group VIII of the Period Table, and an organic additive wherein the catalyst composition is first contacted with an organic liquid, followed by the catalyst being contacted with hydrogen and a sulphur-containing compound in the gaseous phase, wherein less than 40 %, preferably less than 35 %, more preferably less than 25 %, most preferably less than 15 %, of the sulphur present in the sulphided catalyst is added with the organic liquid. The process of the present invention makes it possible to use additive-containing catalysts without loss of activity in units which cannot effect gas phase start-up or are required to carry out a pressure test. The organic liquid may be a hydrocarbon with a boiling range of 150-500 °C, preferably gasoline, white spirit, diesel, gas oil, mineral lube oil, or white oil. The step of contacting the catalyst with hydrogen and a sulphur-containing compound may take place in one step at a temperature of 150-450 °C. It may also take place in two steps, with the first step being performed at a temperature which is lower than that of the second step, with the first step being carried out at a temperature of 100-250 °C and the second step at a temperature of 150-450 °C.

Process for sulphiding an additive-containing catalyst

The invention concerns a process for sulfurizing a catalyst, particularly a refining catalyst comprising a carrier and active metal oxides. In a first step, a sulfur compound mainly consisting of organic polysulfide is introduced into the catalyst mass. A second step consists of first sulfurizing, in the absence of hydrogen, the active metal oxides at a temperature lower than 275° C. and then activating the catalyst at a temperature higher than 275° C. The present invention concerns a process for presulfurizing a hydrocarbon treatment catalyst and/or preconditioning a catalyst in view of subsequent presulfurization.

Process for presulfurizing a hydrogen treatment catalyst

L'invention concerne un procede de sulfuration de catalyseur notamment de raffinage renfermant un support et des oxydes de metaux actifs. The invention relates to a refining including catalyst sulfurization process comprising a support and the active metal oxides. Dans une premiere etape, un compose sulfure a base d'un polysulfure organique est introduit dans la masse catalytique. In a first step, a sulphide compound based on an organic polysulfide is introduced into the catalytic mass. Dans une deuxieme etape, on procede d'abord, en l'absence d'hydrogene, a la sulfuration des oxydes des metaux actifs, a une temperature inferieure a 275°C, et ensuite, on procede a une temperature superieure a 275°C, a l'activation du catalyseur. In a second step, one proceeds initially in the absence of hydrogen, the sulfurization of oxides of active metals, at a temperature less than 275 ° C, and then is carried out a temperature above 275 ° C , activation of the catalyst.

Method for presulfiding a catalyst for the treatment of hydrocarbons

Process for sulphurising a catalyst especially a refining catalyst containing a support and active metal oxides. In a first stage a sulphur compound based on an organic polysulphide is introduced into the catalytic mass. In a second stage the sulphurisation of the active metal oxides is carried out first of all in the absence of hydrogen at a temperature below 275 DEG C and then the activation of the catalyst is carried out at a temperature above 275 DEG C.

Process for presulphurising a catalyst for hydrocarbon treatment

Process for sulphurisation, particularly of a refining catalyst containing a support and active metal oxides. In a first stage a sulphur compound based on an organic polysulphide is introduced into the catalytic mass. In a second stage the sulphurisation of the oxides of the active metals is first of all carried out, in the absence of hydrogen, at a temperature below 275 DEG C, and then the activation of the catalyst is carried out in the presence of hydrogen at a temperature above 275 DEG C

Georges Berrebi

Papers

Process for presulfurizing a hydrogen treatment catalyst

Method for presulfiding a catalyst for the treatment of hydrocarbons

Process for presulphurising a catalyst for hydrocarbon treatment

Process for presulphurisation of catalyst for treating hydrocarbons