Abstract: The present invention describes a process for hydrocracking at least one hydrocarbon feed in which at least 50% by weight of the compounds have an initial boiling point of more than 300° C. and a final boiling point of less than 540° C. using at least one catalyst comprising at least one metal from group VIB and/or at least one metal from group VIII of the periodic classification of the elements and a support comprising at least one zeolite containing at least one series of channels the opening of which is defined by a ring containing 12 oxygen atoms (12MR), and at least one binder, said support being prepared from a highly dispersible alumina gel, said hydrocracking process being operated at a temperature in the range 200° C. to 480° C.

Abstract: A process to produce olefinic products suitable for use as or conversion to oilfield hydrocarbons includes separating an olefins-containing Fischer-Tropsch condensate into a light fraction, an intermediate fraction and a heavy fraction, oligomerising at least a portion of the light fraction to produce a first olefinic product which includes branched internal olefins, and carrying out either one or both of the steps of (i) dehydrogenating at least a portion of the intermediate fraction to produce an intermediate product which includes internal olefins and alpha-olefins, and synthesising higher olefins from the intermediate product which includes internal olefins and alpha-olefins to produce a second olefinic product, and (ii) dimerising at least a portion of the intermediate fraction to produce a second olefinic product. At least a portion of the heavy fraction is dehydrogenated to produce a third olefinic product which includes internal olefins.

Abstract: The present invention relates to a catalytic hydroconversion process in dispersed phase of extra-heavy and heavy crude oils for upgrading their transport properties, that operates at low severity conditions, in such a way that the obtained product can be transported by conventional pumping to the distribution and refining centers. The main technical contributions of the hydroconversion process in dispersed phase of this invention to upgrade the transport properties of heavy and extra-heavy crudes are: Compact size and can be localized next to the production facilities on ground or offshore Use of operating conditions at low severity Reduction of the viscosity and increase of the API gravity at values that allow the transportation by pipeline of heavy or extra-heavy crude Upgrading of the crude oil properties in a permanent way Hydrocarbon and gases from production centers are used as supplies Operation in dispersed phase avoiding plugging problems Use of low-cost disposable catalysts at low concentrations.

Abstract: A method of producing monocyclic aromatic hydrocarbons includes bringing a light feedstock oil having a 10 vol % distillation temperature of 140° C. to 205° C. and a 90 vol % distillation temperature of 300° C. or lower, which has been prepared from a feedstock oil having a 10 vol % distillation temperature of 140° C. or higher and a 90 vol % distillation temperature of 380° C. or lower, into contact with a catalyst for monocyclic aromatic hydrocarbon production containing a crystalline aluminosilicate, in which a content ratio of monocyclic naphthenobenzenes in the light feedstock oil is adjusted by distillation of the feedstock oil such that the content ratio of monocyclic naphthenobenzenes in the light feedstock oil is higher than a content ratio of monocyclic naphthenobenzenes in the feedstock oil.

Abstract: A process, apparatus and system for forming light olefins, the process including heating a resid-containing hydrocarbon feedstock containing at least 10 ppmw of metals to vaporize at least 90 wt. % of said hydrocarbon feedstock; separating in a knockout drum a hydrocarbon vapor portion having less than 10 ppmw metals from a non-vaporized resid-containing portion; and feeding said hydrocarbon vapor to a catalytic cracking process to form light olefins.

Abstract: This invention relates to a method for increasing thermal stability of fuel, as well as in reducing nitrogen content and/or enhancing color quality of the fuel. According to the method, a fuel feedstock can be treated with a solid phosphoric acid catalyst under appropriate catalyst conditions, e.g., to increase the thermal stability of the fuel feedstock. Preferably, the fuel feedstock can be treated with the solid phosphoric acid catalyst at a ratio of catalyst mass within a contact zone to a mass flow rate of feedstock through the zone of at least about 18 minutes to increase the thermal stability of the fuel feedstock, along with reducing nitrogen content and/or enhancing color quality.

Abstract: Provided are multiple correlations for relationships between MI value for a brightstock extract and the distillation cut point temperature used for separation of the vacuum resid that is used to form the brightstock extract. Based on these correlations, a BSE having a desired MI value can be formed based on an adjustment of the distillation cut point temperature. A first correlation establishes a relationship between a fractional weight boiling temperature for a vacuum resid fraction and a distillation cut point temperature for separating the vacuum resid fraction from at least one distillate fraction in a feedstock. A second correlation establishes a relationship between a fractional weight boiling temperature for a brightstock extract derived from the vacuum resid fraction, and the fractional weight boiling temperature for the vacuum resid fraction. A third correlation has been established between the fractional weight boiling temperature for the brightstock extract and a mutagenicity index value.

Abstract: A process for treating a heavy oil by heating a feedstock comprising a heavy oil in order to separate from the heavy oil a first fraction. The first fraction contains no more than 25% of the total number of acid groups of the heavy oil. A second fraction contains at least 75% of the total number of acid groups of the heavy oil. The second fraction then is treated under conditions that provide a heavy oil that has a total acid number, or TAN, that does not exceed 1.0 mg KOH/g, or is at least 50% lower than the total acid number prior to treatment, an olefin content that does not exceed 1.0 wt. %, and a p-value of at least 50% of the p-value of the heavy oil prior to treatment, or a p-value that is at least 1.5.

Abstract: A process is disclosed for hydrocracking a primary hydrocarbon feed and a diesel co-feed in a hydrocracking unit and hydrotreating a diesel product from the hydrocracking unit in a hydrotreating unit. The diesel stream fed through the hydrocracking unit is pretreated to reduce sulfur and ammonia and can be upgraded with noble metal catalyst.

Abstract: A method of hydrocarbon conversion is described. The hydrocarbon feed is decontaminated using an ionic liquid and introduced into a conversion zone. The conversion of the decontaminated feed is increased compared to the conversion of the contaminated feed and the yield of the desired product made from the decontaminated hydrocarbon feed is increased compared to the yield of the desired product made from the contaminated hydrocarbon feed.

Abstract: A process for the conversion of oil feeds for the production of low sulphur fuels comprises the following steps in succession: a step for fixed bed hydrodemetallization of the feed using an upstream system of fixed bed swing reactors; a step for fixed bed hydrocracking of the hydrodemetallized effluent in the presence of a hydrocracking catalyst; a step for separation in order to obtain a heavy fraction; a step for hydrodesulphurization of the heavy fraction in which hydrogen is reinjected.

Abstract: Disclosed herein is an improved fluidized catalytic cracking process for converting normally liquid hydrocarbon feedstock with simultaneous reduction of sulfur content in the liquid products obtained therefrom which comprises carrying out the cracking process in the presence of carbon monoxide gas as a reducing agent. The process optionally includes a step of premixing the hydrocarbon feedstock with carbon monoxide gas causing major sulfur reduction before effecting the cracking. The premixing is done in a specified nozzle assembly linked to the FCC unit.

Abstract: A method for producing ILSAC GF5 or higher compatible oils from used oil, comprising separating material having a boiling point less than about 350° F. from recovered oil to produce de-volatized oil fraction and light oil fraction. Separating material with a boiling point greater than about 350° F. and less than about 650° F. from the de-volatized oil fraction to produce fuel oil fraction and heavy oil fraction. Separating material with a boiling point greater than about 1200° F. from the heavy oil fraction to produce partially purified oil fraction and residual fraction. Treating the partially purified oil fraction to separate it into purified oil fraction and contaminant fraction. Hydrogenating the contaminant fraction to remove predetermined compounds, further saturating the fraction and thereby creating a saturated oil fraction. Fractionating the saturated oil stream to produce one or more of naphtha fraction, diesel oil fraction and base oil fraction.

Abstract: Herein disclosed is a method for catalytic cracking or reforming of hydrocarbons comprising: supersaturating a hydrocarbonaceous liquid or slurry stream in a high shear device with a gas stream comprising one or more C1-C6 hydrocarbons and optionally hydrogen to form a supersaturated dispersion; introducing the supersaturated dispersion into a catalytic cracking or reforming reactor in the presence of a cracking or reforming catalyst to generate a product stream. In some embodiments, the catalyst is present as a slurry or a fluidized or fixed bed of catalyst. In some embodiments, the cracking or reforming catalyst is mixed with the hydrocarbonaceous liquid or slurry stream and the gas stream in the high shear device. Herein also disclosed is a system for catalytic cracking or reforming of hydrocarbons.

Abstract: Herein disclosed is a method for thermal cracking or steam cracking of hydrocarbons comprising: supersaturating a hydrocarbonaceous liquid or slurry stream in a high shear device with a gas stream comprising steam or hydrogen and optionally one or more C1-C6 hydrocarbons to form a supersaturated dispersion; and introducing the supersaturated dispersion into a thermal cracking or steam cracking reactor to generate a product stream. In some embodiments, the method further comprises contacting the supersaturated dispersion with a cracking catalyst in a slurry, a fluidized catalyst bed, or a fixed catalyst bed. In some embodiments, the cracking catalyst is mixed with the hydrocarbonaceous liquid or slurry stream and the gas stream in the high shear device. Herein also disclosed is a system for thermal cracking or steam cracking of hydrocarbons.

Abstract: The physical and chemical properties of heavy and extra-heavy crudes are improved by a procedure that uses a homogeneous type catalyst and involves the stages: 1. separation and removal of the water fraction that is contained in the hydrocarbons, 2. catalyst injection and activation of the reaction system, 3. elimination of gaseous hydrocarbons and recovery of the partial pressure of hydrogen at different times, 4. reaction and 5. recovery of distillated products.

Abstract: An improved hydrovisbreaking process for reducing the viscosity of a liquid hydrocarbon feedstock is provided. A substantially single-phase hydrogen-enriched liquid hydrocarbon feedstock is obtained by mixing the feedstock with hydrogen gas and flashing off the excess hydrogen gas. Comparatively smaller reactor vessels can be used without a gas recycle system, thus reducing the capital cost of hydrovisbreaking process. Further the need for cutter stocks can be minimized or eliminated.

Abstract: Production of gasolines with low sulfur contents from a starting gasoline containing sulfur-containing compounds comprising a stage a) for selective hydrogenation of non-aromatic polyunsaturated compounds present in the starting gasoline, a stage b) for increasing the molecular weight of the light sulfur-containing products that are initially present in the gasoline that enters this stage, a stage c) for alkylation of at least a portion of the sulfur-containing compounds present in the product that originates from stage b), a stage d) for fractionation of the gasoline that originates from stage c) into at least two fractions, one fraction virtually lacking in sulfur-containing compounds, whereby the other contains a larger proportion of sulfur-containing compounds (heavy gasoline), a stage e) for catalytic treatment of the heavy gasoline for transformation of sulfur-containing compounds under conditions for the at least partial decomposition of hydrogenation of these sulfur-containing compounds.

Abstract: Heavy hydrocarbons contained in FT off gas of a GTL process are removed by bringing the FT off gas into contact with absorption oil, by introducing the FT off gas into a distillation tower, by cooling the FT off gas or by driving the FT off gas into an adsorbent. A burner tip for heating a reformer tube, using FT off gas as fuel, is prevented from being plugged by the deposition of heavy hydrocarbons contained in the FT off gas.

Abstract: This is a unique way to optimize an existing refinery to process heavy bitumen. The upgrade utilizes a diluent recovery unit (DRU) in front of a Resid Hydrocracker. The recovered bitumen from the Resid Hydrocracker is fed to an integrated atmospheric fractionator to convert the light sweet refinery to diluted bitumen.

Abstract: A process for removing a nitrogen compound and a sulfur compound from a hydroprocessed vacuum gas oil feed includes contacting the hydroprocessed vacuum gas oil feed comprising the nitrogen compound and the sulfur compound with a VGO-immiscible phosphonium ionic liquid to produce a hydroprocessed vacuum gas oil and VGO-immiscible phosphonium ionic liquid mixture, and separating the mixture to produce a hydroprocessed vacuum gas oil effluent having a reduced nitrogen compound and sulfur compound content relative to the vacuum gas oil feed. It was found that the amount of the sulfur compound being removed was significantly improved by first removing the nitrogen compounds, especially polar nitrogen compounds.

Abstract: A process for removing a nitrogen compound from a vacuum gas oil feed includes contacting the vacuum gas oil feed comprising the nitrogen compound with a VGO-immiscible phosphonium ionic liquid to produce a vacuum gas oil and VGO-immiscible phosphonium ionic liquid mixture, and separating the mixture to produce a vacuum gas oil effluent having a reduced nitrogen content relative to the vacuum gas oil feed.

Abstract: The present invention relates to a method and to a plant for dehydration of a liquid or gaseous effluent, wherein the following stages are carried out: neutralizing the effluent with at least one of the following brines: soda brine, potash brine, or mixtures thereof, dehydrating the neutralized effluent on soda or potash briquettes, collecting the brine resulting from dehydration and using it in the neutralization stage (2).

Abstract: The present invention relates to a catalytic process for removing organonitrogen species from hydrocarbon mixtures such as refinery process feedstreams. More particularly, this invention relates to a new operating and catalyst loading strategies based on organonitrogen concentration, composition, and structure.

Abstract: Methods and systems for integrating bitumen extraction processes with bitumen upgrading processes are disclosed. The methods and systems can include recovering an emulsion of hydrocarbon and water from a Steam Assisted Gravity Drainage extraction process, breaking the emulsion, using the water from the emulsion to make steam, upgrading the hydrocarbon from the emulsion using the steam, separating diluent from the upgraded hydrocarbon, and using the diluent to break SAGD-produced emulsion.

Abstract: An MCM-41 catalyst having a crystalline framework containing SiO2 and a Group IV metal oxide, such as TiO2 or ZrO2 is provided. The catalyst is low in acidity and is suitable for use in processes involving aromatic saturation of hydrocarbon feedstocks.

Abstract: This invention relates to a method for increasing thermal stability of fuel, as well as in reducing nitrogen content and/or enhancing color quality of the fuel. According to the method, a fuel feedstock can be treated with a solid phosphoric acid catalyst under appropriate catalyst conditions, e.g., to increase the thermal stability of the fuel feedstock. Preferably, the fuel feedstock can be treated with the solid phosphoric acid catalyst at a ratio of catalyst mass within a contact zone to a mass flow rate of feedstock through the zone of at least about 18 minutes to increase the thermal stability of the fuel feedstock, along with reducing nitrogen content and/or enhancing color quality.

Abstract: A process for hydroconversion-distillation of heavy and/or extra-heavy crude oils, which comprises four stages: 1) desalting and separation of the feedstock; 2) catalytic hydrotreating of light fraction (optional); 3) catalytic hydroconversion of heavy fraction, and 4) distillation of hydrotreated products to provide products that can be processed in conventional refining schemes designed to operate with light and intermediate crude oils.

Abstract: According to one embodiment, a method includes desulfurizing a hydrocarbon feedstock in the presence of a desulfurization catalyst. A hydrocarbon product is recovered. The color of the hydrocarbon product is improved and the sulfur content of the hydrocarbon product is reduced by flash distilling the product.

Abstract: A process for converting heavy sulfur-containing crude oil into lighter crude oil with lower sulfur content and lower molecular weight is provided. The process is a low-temperature process using controlled cavitation.

Abstract: A process and apparatus for improving flow properties of crude may include processing a first crude stream, which may in turn include cracking the first crude stream with catalyst to form a cracked stream and spent catalyst, hydrotreating a portion of the cracked stream and then mixing the hydrotreated stream with an unprocessed second crude stream.

Abstract: A method and apparatus for upgrading a hydrocarbon feedstock is provided. The method includes the steps of (a) supplying a hydrocarbon feedstock to an oxidation reactor, wherein the hydrocarbon feedstock is oxidized in the presence of a catalyst under conditions sufficient to selectively oxidize sulfur compounds present in the hydrocarbon feedstock; (c) separating the hydrocarbons and the oxidized sulfur compounds by solvent extraction; (d) collecting a residue stream that includes the oxidized sulfur compounds; and (e) supplying the residue stream to a coker to produce coker gases and solid coke.

Abstract: An integrated process for producing naphtha fuel, diesel fuel and/or lubricant base oils from feedstocks under sour conditions is provided. The ability to process feedstocks under higher sulfur and/or nitrogen conditions allows for reduced cost processing and increases the flexibility in selecting a suitable feedstock. The sour feed can be delivered to a catalytic dewaxing step without any separation of sulfur and nitrogen contaminants. The integrated process includes an initial dewaxing of a feed under sour conditions, optional hydrocracking of the dewaxed feed, and a separation to form a first diesel product and a bottoms fraction. The bottoms fraction is then exposed to additional hydrocracking and dewaxing to form a second diesel product and optionally a lubricant base oil product. Alternatively, a feedstock can be hydrotreated, fractionated, dewaxed, and then hydrocracked to form a diesel fuel and a dewaxed, hydrocracked bottoms fraction that is optionally suitable for use as a lubricant base oil.

Abstract: One exemplary embodiment can be a process for a hydrocarbon feed. The process can include passing a stream through a separation zone forming a void for separating one or more gases from one or more liquids and at least partially containing a catalyst. The catalyst may include at least one group VIII noble metal. Typically, the separation zone is downstream of a hydrocracking zone for reducing the operating pressure in the hydrocracking zone.

Abstract: A process for removing a nitrogen compound from a vacuum gas oil feed includes contacting the vacuum gas oil feed comprising the nitrogen compound with a VGO-immiscible phosphonium ionic liquid to produce a vacuum gas oil and VGO-immiscible phosphonium ionic liquid mixture, and separating the mixture to produce a vacuum gas oil effluent having a reduced nitrogen content relative to the vacuum gas oil feed.

Abstract: A biocomponent feedstock can be hydroprocessed using a hydrogen-containing refinery as a source of hydrogen gas. A relatively low cost catalyst, such as a water gas shift catalyst and/or spent hydrotreating catalyst, can be used as a hydrogenation catalyst for the process. The hydroprocessing can allow for olefin saturation and/or deoxygenation of the biocomponent feed by using a relatively low value refinery stream, e.g., containing from about 20 mol % to about 60 mol % hydrogen.

Abstract: A process for removing a sulfur compound from a vacuum gas oil feed includes contacting the vacuum gas oil feed comprising the sulfur compound with a VGO-immiscible ionic liquid to produce a vacuum gas oil and VGO-immiscible ionic liquid mixture, and separating the mixture to produce a vacuum gas oil effluent having a reduced sulfur content relative to the vacuum gas oil feed.

Abstract: This invention relates to process for producing a reformate or gasoline product. The process involves a rapid cycle of reacting hydrocarbon feedstock to form the product and then regenerating the catalyst used in the reaction. The process can be carried out at relatively high liquid hourly space velocities and preferably at relatively low hydrogen to hydrocarbon ratios to produce a reformed product having relatively high liquid yield and hydrogen content.

Abstract: A process is provided to produce high cetane quality and low or preferably ultra low sulfur diesel and a fluid catalytic cracker (FCC) quality feedstock from a processing unit including at least a hydrotreating zone and a hydrocracking zone. In one aspect, the processing unit includes reactor severity requirements in both the hydrotreating zone and the hydrocracking zone effective to produce the FCC feed quality and the diesel sulfur quality to permit a high quality hydrocracked product to be formed at lower pressures and conversion rates without overtreating the FCC quality feedstock stream. In another aspect, a portion of the hydrotreated effluent is selected for conversion in the hydrocracking and the remaining portion of the hydrotreated effluent is directed to subsequent processing, such as fluid catalytic cracking.

Abstract: The present invention describes a method for hydrocracking and/or hydrotreating hydrocarbon-containing feeds using a catalyst comprising at least one hydro-dehydrogenizing metal selected from the group made up of group VIB and non-noble group VIII metals of the periodic table and a support comprising at least one zeolite having at least pore openings containing 12 oxygen atoms, modified by a) at least a stage of introducing at least one alkaline cation belonging to groups IA or IIA of the periodic table, b) a stage of treating said zeolite in the presence of at least one molecular compound containing at least one silicon atom, c) at least one stage of partial exchange of said alkaline cations by NH4+ cations in such a way that the proportion of alkaline cations remaining in the modified zeolite at the end of stage c) is such that the alkaline cation/aluminium molar ratio ranges between 0.2:1 and 0.01:1, and d) at least one thermal treatment stage.

Abstract: There is disclosed a method for conversion of crude tall oil into high-quality diesel fuels comprising the steps of: (a) removal of non-oil contaminants present in the crude tall oil and recovering valuable organic compounds present in the crude tall oil, thereby forming a refined tall oil stream; (b) removal of the volatile fraction of the refined tall oil stream from step a), thereby forming a volatiles free oil stream comprising organic components with boiling points, at atmospheric pressure, of 170 degrees C. or higher; (c) separation in a vacuum distillation column of the volatiles free oil stream of step b) into two process streams or phases wherein a first process stream or phase is substantially comprising components with boiling points, at atmospheric pressure, in the range of 170-400 degrees C. and a second process stream or phase is substantially comprising components with boiling points, at atmospheric pressure, over 400 degrees C.

Abstract: An object of the invention is to provide a method of producing synthetic fuel from Fischer-Tropsch synthetic crude oil obtained by a Fischer-Tropsch synthesis method, the method comprising the steps of: (a) fractionating, in a fractionator, Fischer-Tropsch synthetic crude oil obtained by a Fischer-Tropsch synthesis method into at least two fractions of a middle fraction containing a component having a boiling range corresponding to diesel fuel oil, and a wax fraction containing a wax component heavier than the middle fraction; (b) separating and removing a magnetic particle contained in the wax fraction obtained in the step (a) at 100° C. to 450° C. by using a high gradient magnetic separator; and (c) hydrocracking the wax fraction obtained in the step (b) from which the magnetic particle is separated and removed.

Abstract: A wax fraction from a hydrocarbon synthesis process is fractionated in a vacuum distillation column prior to any hydrocracking steps. A straight-run distillation fraction is isolated from the vacuum distillation. A heavy wax fraction from the vacuum distillation process is hydroprocessed, and a hydroprocessed distillate fraction is recovered. The straight-run distillate fraction and the hydroprocessed distillate fraction are combined to make a fraction that boils in the range of diesel fuel.

Abstract: This invention relates to a high-pressure ultrafiltration process to produce an improved coker feed for producing a substantially free-flowing coke, preferably free-flowing shot coke from an atmospheric and/or vacuum resid feedstock. The process of this invention utilizes a high-pressure ultrafiltration process to produce an intermediate product stream with improved the Conradson Carbon Residue (CCR) content which is utilized in either an improved delayed coking or a fluid coking process.

Abstract: A method for treating fuel containing vanadium including extracting vanadium from the fuel with an adsorption material and fractionating the fuel into a light oil fraction and a heavy fuel fraction. The light fuel fraction has a reduced amount of vanadium. Systems for fuel preparation are also provided.

Abstract: A process is provided to produce high cetane quality and low or preferably ultra low sulfur diesel and a fluid catalytic cracker (FCC) quality feedstock from a processing unit including at least a hydrotreating zone and a hydrocracking zone. In one aspect, the processing unit includes reactor severity requirements in both the hydrotreating zone and the hydrocracking zone effective to produce the FCC feed quality and the diesel sulfur quality to permit a high quality hydrocracked product to be formed at lower pressures and conversion rates without overtreating the FCC quality feedstock stream. In another aspect, a portion of the hydrotreated effluent is selected for conversion in the hydrocracking and the remaining portion of the hydrotreated effluent is directed to subsequent processing, such as fluid catalytic cracking.

Abstract: A process for producing lube oil basestocks involving solvent extracting a waxy feed to produce at least a lube oil boiling range raffinate, hydrotreating the lube oil raffinate to produce a hydrotreated raffinate, and dewaxing the hydrotreated raffinate.

Abstract: Contact of a crude feed with one or more catalysts produces a total product that includes a crude product. The crude product is a liquid mixture at 25° C. and 0.101 MPa. The one or more catalysts may include a catalyst that has a median pore diameter of at least 90 ?. One or more properties of the crude product may be changed by at least 10% relative to the respective properties of the crude feed.

Abstract: The invention is directed to a method of making a catalyst comprising an intermediate pore size molecular sieve, preferably a zeolite of the MTT or TON type. SSZ-32 and ZSM-22 are examples of such molecular sieves. This catalyst is modified with a metal or metals selected from the group consisting of Ca, Cr, Mg, La, Ba, Pr, Sr, K and Nd. The catalyst is additionally loaded with a Group VIII metal or metals for hydrogenation purposes. The catalyst is suitable for use in a process whereby a feed including straight chain and slightly branched paraffins having 10 or more carbon atoms is isomerized.

Abstract: A process for the hydroisomerization of a waxy feed having a major portion boiling above 650° F. to produce a lubricating base oil having a lower pour point, said process comprising (a) passing the waxy feed along with hydrogen gas through a hydroisomerization zone maintained at a hydrogen partial pressure of between about 100 psia and about 400 psia, said hydroisomerization zone comprising a catalyst bed containing at least two active wax hydroisomerization catalysts, said catalysts comprising at least (i) a first catalyst comprising an active hydrogenation component and a 1-D, 10-ring molecular sieve having a maximum crystallographic free diameter of the channels equal to 6.2 ? units or greater and (ii) a second catalyst comprising an active hydrogenation component and a 1-D, 10-ring molecular sieve having a maximum crystallographic free diameter of the channels equal to 5.