EP0168146B1 - Procédé pour fabriquer des huiles lubrifiantes à partir de charge de départ lourde - Google Patents

Procédé pour fabriquer des huiles lubrifiantes à partir de charge de départ lourde Download PDF

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EP0168146B1
EP0168146B1 EP85303639A EP85303639A EP0168146B1 EP 0168146 B1 EP0168146 B1 EP 0168146B1 EP 85303639 A EP85303639 A EP 85303639A EP 85303639 A EP85303639 A EP 85303639A EP 0168146 B1 EP0168146 B1 EP 0168146B1
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inch
catalyst
catalyst composite
zsm
extrudate
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EP0168146A1 (fr
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Nai Yuen Chen
Susan Marie Leiby
Bruce Patrick Pelrine
Thomas Francis Degnan, Jr.
Stephen Michael Oleck
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ExxonMobil Oil Corp
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Mobil Oil Corp
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/58—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins
    • C10G45/60—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins characterised by the catalyst used
    • C10G45/64—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins characterised by the catalyst used containing crystalline alumino-silicates, e.g. molecular sieves

Definitions

  • This invention is concerned with manufacture of high grade viscous oil products from crude petroleum fractions or other hydrocarbon materials. It is particularly directed to the manufacture of high quality lube basestock oils from crude stocks of high boiling point as opposed to using so-called light stocks. The latter crudes have lower boiling points and for reasons which are not fully understood, do not show any advantage in the novel process of this invention over commercially practiced technology. More specifically, the invention is concerned with dewaxing a lube basestock oils having an initial boiling point higher than 371°C (700°F) and a 50 volume percent boiling point of at least 482°C (900°F).
  • High quality lube basestock oils are conventionally prepared by refining distillate fractions or the residuum prepared by vacuum distilling a suitable crude oil from which the lighter portion has been removed by distillation in an atmospheric tower.
  • the charge to the vacuum tower is commonly referred to as a "long rediuum” and residuum from the vacuum tower is distinguished from the starting material by referring to it as the “short residuum”.
  • the vacuum distillate fractions are upgraded by a sequence of unit operations, the first of which is solvent extraction with a solvent selective for aromatic hydrocarbons.
  • This step serves to remove aromatic hydrocarbons of low viscosity index and provides a raffinate of improved viscosity index and quality.
  • Various processes have been used in this extraction stage, and these employ solvents such as furfural, phenol, sulfur dioxide, and others.
  • the short residuum because it contains most of the asphaltenes of the crude oil, is conventionally treated to remove these asphalt-like constituents prior to solvent extraction to increase the viscosity index.
  • the raffinate from the solvent extraction step contains parraffins which adversely affect the pour point.
  • the waxy raffinate regardless of whether prepared from a distillate fraction or from the short residuum, must be dewaxed.
  • Various dewaxing procedures have been used, and the art has gone in the direction of treatment with a solvent such as methyl ethyl ketone/toluene mixtures to remove the wax and prepare a dewaxed raffinate.
  • the dewaxed raffinate may then be finished by any number of sorption or catalytic processes to improve colour and oxidation stability.
  • United States Patent No. 3,755,145 discloses a process for preparing lube oil having low pour points involving using a catalyst mixture comprising hydrogenation components, a conventional cracking catalyst and a crystlline aluminosilicate zeolite of the ZSM-5 type.
  • a catalyst mixture comprising hydrogenation components, a conventional cracking catalyst and a crystlline aluminosilicate zeolite of the ZSM-5 type.
  • Column 8 there is specifically disclosed the use of an extrudate having a 1/16th of an inch diameter.
  • United States Patent No. 3,894,938 discloses the catalytic dewaxing and desulfurization of gas oils with a ZSM-5 zeolite containing a hydrogenation component.
  • the ZSM-5 can be incorporated into a matrix and that the catalyst particles can be sized between 0.8 and 3.2 mm (1/32nd and 1/8th of an inch).
  • EP-A-0104855 discloses a process for preparing a high quality lube base stock oil of low pour point and excellent stability from a waxy cude oil fraction in a single-stage hydrodewaxing process.
  • the process uses ZSM-5 catalyst containing Ni-Mo or Co-Mo.
  • the feed is a propane-deasphalted fraction having an initial boiling point of at least 232°C and a final boiling point of less than 593°C. 1.59 mm (1/16th inch) diameter extrudate was used in those examples where catalyst diameter was reported.
  • United States 3,846,337 discloses silica-bound silicate particles of improved strength within the range of 0.8 to 3.2 mm (1/32 to about 1/8 inch) average extrudate diameter and their use in various catalysts reactions.
  • the present invention provides a process for dewaxing a petroleum feedstock having an initial boiling point of at least 371°C (700°F) and a 50 volume percent boiling point of at least 482°C (900°F) wherein said hydrocarbon is contacted in the presence of added hydrogen at a temperature of 232 to 427°C (450 to 800°F) with a dewaxing catalyst comprising aluminosilicate zeolite having a silica-to-alumina ratio of greater than 12 and a Constraint Index of 1 to about 12 and wherein said aluminosilicate zeolite is composited with an inorganic oxide binder and characterised by using a catalyst composite having a maximum diffusion distance of less than 0.6 mm (0.025 inch).
  • diffusion distance is defined as the ratio of the volume of the shape of catalyst composite to the surface through which the reactants diffuse into this volume.
  • the wax base crudes (sometimes called "paraffin base") from which the chargestock is derived by distillation constitute a well-recognized class of crude petroleums.
  • Many scales have been devised for classification of crude, some of which are described in Chapter VII, "Evaluation of Oil Stocks of Petroleum Refinery Engineering, by W. L. Nelson, McGraw Hill, 1941.
  • a convenient scale identified by Nelson at page 69 involves determination of the cloud point of the Bureau of Mines (key fraction #2) which boils between 275°C (527°F) and 300°C (572°F) at 40 mm pressure. If the cloud point of this fraction is above -15°C (5°F), the crude is considered wax base.
  • a suitable chargestock such as a propane deasphalted short residium fraction or a fraction having an initial boiling point of at least 468°C (875°F), and preferably at least 482°C (900°F.) and a final boiling point greater than 649°C (1200°F) is prepared by distillation of such wax base crude.
  • Such fraction can then be solvent refined by counter current extraction with at least an equal volume (100 volume percent) of a selective solvent such a furfural. It is preferred to use about 1.5-3.0 volumes of solvent per volume of oil.
  • the furfural raffinate has an initial boiling point of greater than 371°C (700°F) and a 50 volume percent boiling point of at least 482°C (900°F).
  • catalytic dewaxing by mixing in hydrogen and contacting at 232 to 427°C (450 to 800°F), preferably at 260 to 371°C (500 to 700°F), with a catalyst containing a hydrogenation metal, an inorganic oxide binder and zeolite ZSM-5 or other related silicate zeolites having a silica-to-alumina ratio of at least 12 and a Constraint Index of 1-12 and a liquid hourly space velocity (LHSV) of 0.1-2.0 volumes of charge oil per volume of catalyst per hour.
  • the preferred space velocity is 0.5-1.0 LHSV.
  • the catalyst is extruded or otherwise shaped so as to have a maximum diffusion distance of less than 0.6 mm (0.025 inch).
  • the catalytic dewaxing reaction is preferably carried out at hydrogen partial pressures of 1,100 to 21,000 kPa (150 to 300 psig), at the reactor inlet, and preferably at 1,800 to 10,400 kPa (250 to 1500 psig).
  • Dewaxing operates at a hydrogen circulation of 90 to 900 volumes of liquid at standard conditions per volume of H 2 at standard conditions, v/v, (500 to 5000 standard cubic feet per barrel of feed (SCFB)), preferably 270 to 530 v/v (1500 to 3000 SCFB).
  • the solvent extraction technique is well understood in the art and needs no detailed review here.
  • the severity of extraction is adjusted to composition of the chargestock to meet specifications for the particular lube basestock and the contemplated end-use; this severity will be determined in practice of this invention in accordance with well-established practices.
  • the catalytic dewaxing step is conducted at 232 to 427°C (450 to 800°F). However, at temperatures above 357°C (675°F), bromine number of the product generally increases and the oxidation stability decreases.
  • the dewaxing catalyst is a composite of hydrogenation metal, such as nickel, cobalt, molybdenum, chromium, tungsten, palladium, platinum or compositions thereof associated with the acid form of a novel class of aluminosilicate zeolite having a silica-to-alumina ratio of at least about 12, and a constrained access to the intracrystalline free space, as more fully described herinbelow.
  • hydrogenation metal such as nickel, cobalt, molybdenum, chromium, tungsten, palladium, platinum or compositions thereof associated with the acid form of a novel class of aluminosilicate zeolite having a silica-to-alumina ratio of at least about 12, and a constrained access to the intracrystalline free space, as more fully described herinbelow.
  • zeolites An important characteristic of the crystal structure of this class of zeolites is that it provides constrained access to and egress from the intracrystalline free space by virtue of having a pore dimension greater than about 5 Angstroms and pore windows of about a size such as would be provided by 10-membered rings of oxygen atoms. It is to be understood, of course, that these rings are those formed by the regular disposition of the tetrahedra making up the anionic framework of the crystalline aluminosilicate, the oxygen atoms themselves being bonded to the silicon or aluminum atoms at the centers of the tetrahedra.
  • the preferred type zeolites useful in this invention possess, in combination: a silica-to-alumina mole ratio of at least about 12; and a structure providing constrained access to the crystalline free space.
  • the silica-to-alumina ratio referred to may be determined by conventional analysis. This ratio is meant to represent, as closely as possible, the ratio in the rigid anionic framework of the zeolite crystal and to exclude aluminum in the binder or in cationic or other form within the channels.
  • zeolites with a silica-to-alumina ratio of at least 12 are useful, it is preferred to use zeolites having higher ratios of at least 30. Such zeolites, after activation acquire an intracrystalline sorption capacity for normal hexane which is greater than that for water, i.e., they exhibit "hydrophobic" properties. It is believed that this hydrophobic characteristic is advantageous in the present invention.
  • a simple determination of the Constraint Index may be made by passing continuously a mixture of an equal weight of normal hexane and 3-methylphentane over a small sample, approximately 1 gram or less, of catalyst at atmospheric pressure according to the following procedure.
  • a sample of the zeolite, in the form of pellets or extrudates, is crushed to a particle size about that of coarse sand and mounted in a glass tube.
  • the zeolites Prior to testing, the zeolites is treated with a stream of air at 538°C (1000°F) for at least 15 minutes.
  • the zeolite is then flushed with helium and the temeprature adjusted to give an overall conversion between 10% and 60 percent.
  • the mixture of hydrocarbons is passed at 1 liquid hourly space velocity (LHSV) (i.e., 1 volume of liquid hydrocarbon per volume of zeolite per hour) over the zeolite with a helium dilution to give a helium to total hydrocarbon mole ratio of 4 to 1.
  • LHSV liquid hourly space velocity
  • a sample of the effluent is taken and analyzed, most conveniently by gas chromatography, to determine the fraction remaining unchanged for each of the two hydrocarbons.
  • the Constraint Index is calculated as follows:
  • Constraint Index approximates the ratio of the cracking rate constants for the two hydrocarbons.
  • Zeolites suitable for the present invention are those having a Constraint Index in the approximate range of 1 to 12.
  • Constraint Index (CI) values for some typical zeolites are:
  • Constraint Index values typically characterize the specified zeolites but that such are the cumulative result of several variables used in determination and calculation thereof. Thus, for a given zeolite depending on the test temperature, the Constraint Index may vary within the indicated approximate range of 1 to 12. Likewise, other variables such as the crystal size of the zeolite, the presence of possible occluded contaminants and binders intimately combined with the zeolite affect the Constraint Index. It will accordingly be understood by those skilled in the art that the Constraint Index, as utilized herein, while affording a highly useful means for characterizing the zeolites of interest is approximate, taking into consideration the manner of its determination, with probability, in some instances, of compounding variable extremes.
  • the class of zeolites defined herein is exemplifed by ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38, and other similar materials.
  • U.S. Patent No. 3,702,886, describes ZSM-5.
  • ZSM-35 is described in U.S. Patent No. 4,016,245.
  • the specific zeolites described when prepared in the presence of organic cations, are catalytically inactive, possibly because the intracrystalline free space is occupied by organic cations from the forming solution. They may-be activated by heating in in inert atmosphere, followed by base exchange with ammonium salts followed by calcination.
  • Natural zeolites may sometimes be converted to this type zeolite catalyst by various activation procedures and other treatments such as base exchange, steaming, alumina extraction and calcination, in combinations.
  • Natural minerals which may be so treated include ferrierite, brewsterite, stilbite, dachiardite, epistilbite, heulandite, and clinoptilolite.
  • the preferred crystalline aluminosilicates are ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-38 and ZSM-35, with ZSM-5 particularly preferred.
  • the zeolite When synthesized in the alkali metal form, the zeolite is conveniently converted to the hydrogen form, generally by intermediate formation of the ammonium form as a result of ammonium ion exchange and calcination of the ammonium form to yield the hydrogen form.
  • the hydrogen form In addition to the hydrogen form, other forms of the zeolite wherein the original alkali metal has been reduced to less than about 1.5 percent by weight may be used.
  • the original alkali metal of the zeolite may be replaced by ion exchange with other suitable ions of Groups IB to VIII of the Periodic Table, including, by way of example, nickel, copper, zinc, palladium, calcium or rare earth metals.
  • crystalline aluminosilicate zeolite in another material resistant to the temperature and other conditions employed in the process.
  • matrix materials include synthetic or naturally occurring substances as well as inorganic materials such as clay, silica and/or metal oxides. The latter may be either naturally occurring or in the form of gelatinous precipitates or gels including mixtures of silica and metal oxides.
  • Naturally occurring clays which can be composited with the zeolite include those of the montmorillonite and kaolin families, which families include the sub-bentonites and the kaolins commonly known as Dixie, NcNamee-Georgia and Florida clays or others in which the main mineral constituent is halloysite, kaolinite, dickite, nacrite or anauxite. Such clays can be used in the raw state as originally mined or initially subjected to calcination, acid treatment or chemical modification.
  • the zeolites employed herein may be composited with a porous matrix material, such as alumina, silica-alumina, silica-magnesia, silica-zirconia, silica-thoria, silica-beryllia, silica-titania as well as ternary compositions, such as silica-alumina-thoria, silica-alumina-zirconia, silica-alumina-magnesia and silica-magnesia-zirconia.
  • the relative proportions of zeolite component and inorganic oxide gel matrix may vary widely with the zeolite content ranging from between 1 to 99 percent by weight and more usually in the range of 55 to about 80 percent by weight of the composite.
  • the method of forming the particle or extrudate of the desired diameter size is accomplished according to conventional techniques in the prior art, and no particular novelty is claimed in the method of making the material.
  • a mixture of a suitable zeolite such as ZSM-5 containing a hydrogenation component and an inorganic oxide matrix such as alumina in a suitable weight ratio, i.e., 65 weight percent zeolite; 35 weight percent alumina are mixed with water and extruded through a .0625 inch to a conventional commercial extruder such as a Califormia pellet mill having the appropriate diameter hole, i.e., from 0.3 to 1.3 mm (.0125 to .05 inch).
  • the extrudate is then dried and calcined at elevated temperatures, i.e. 538°C (1000°F) for about 3 hours. Neither the drying nor the calcination time is particularly critical, and it is the conventional time used in making extrudates.
  • Extrusion is also useful for forming other shapes of particles that are desirable for this catalyst. These are formed by using suitable shaped orifices in the die plate of the extruder.
  • U.S. Patent No. 3,674,680 to Hoekstra et al. represents a suitable extrudate shape;
  • U.S. 3,674,680 uses small catalyst shapes wherein all points in the particles are less than 0.4 mm (0.015 inch) from a surface of the particle.
  • Shapes having a configuration of cross, clover leaf, quadrulobe or trilobe such as in U.S. 3,857,780 are operable here, so long as the maximum dimension of the cross section of the lobes or shapes in such that the maximum diffusion distance is less than 0.6 mm (0.025 inches) from the particle surface.
  • Spherical or near-spherical particles within the specified dimension range of the surface are also operable herein. These generally are formed from freshly extruded material, for example, by a process where the extrudate is reshaped in spinning vessel or drum. Such equipment is available commercially as marumerizers from the Eli Lily Company and others.
  • Charge stock A a 345 bright stock, was prepared by propane deasphalting the vacuum resid. The deasphalted oil was then furfural extracted to reduce the aromatics content.
  • Charge stock B a 339 heavy neutral, was prepared by vacuum distillation. This heavy vacuum distillate was then furfural extracted to reduce the aromatics content.
  • Charge stock C a 318 light neutral, was also prepared by vacuum distillation. This light vacuum distillate was also furfural extracted to lower the aromatics content.
  • a nickel ZSM-5 catalyst combined with an alumina matrix and extruded to a diameter of 1.6 mm (0.0625 inch) was prepared as follows:
  • Dried sodium form ZSM-5 crystals and Kaiser SA alumina powder (alpha alumina monohydrate) were blended in a ratio of 65 parts by wt ZSM-5 and 35 parts by wt A1 2 0 3 (both on a dry basis), extruded to 1.6 mm (.0625 inch) diameter cylinders and calcined for three hours at 538°C (1000°F).
  • the calcined product was exchanged with NH 4 NO 3 solution to low sodium and then with ni(NO a ) 2 solution. It was dried and then calcined at 538°C (1000°F).
  • the nickel content was 1.3 weight percent and the sodium was 0.02 weight percent.
  • the calcined extrudate was then steamed at 482°C (900°F) for six hours.
  • the measured alpha activity was 68.
  • a nickel ZSM-5 catalyst combined with an alumina matrix and extruded to a diameter of 0.8 mm (0.03125 inch) was prepared as follows:
  • This catalyst was prepared by the same procedure as Example 4, except that the extrudates produced were 0.8 mm (1/32 inch) diameter.
  • the nickel content was 1.0 weight percent and the sodium was 0.03 weight percent.
  • the measured alpha activity was 75.
  • the physical properties of the catalyst prepared in accordance with Examples 4 and Examples 5 are shown in Table 2. It is to be understood that the catalyst can be employed in the fresh state or can be subjected to a mild steaming treatment at elevated temperatures from 427 to 816°C (800 to 1500°F) and preferably 427 to 649°C (800 to 1200°F).
  • the treatment may be accomplished in atmospheres of 100 percent steam or at atmospheres consisting of steam and a gas which is substantially inert to the zeolites.
  • a similar treatment can be accomplished at lower temperatures and elevated pressures, e.g., 177 to 371°C (350 to 700°F) at 10 to about 200 atmospheres.
  • Figure 1 shows the results obtained utilizing the catalyst of Example 4 having a 1.6 mm (0.0625 inch) diameter extrudate.
  • Figure 2 shows the results obtained using the catalyst of the invention, 0.8 mm (0.03125 inch) diameter extrudate (Example 5). Both catalysts had undergone previous dewaxing cycles with subsequent high temperature hydrogen reactivations.
  • the catalysts of Examples 4 and 5 are used to dewax the heavy neutral raffinate identified as Feed B to a pour point of -7°C (+20°F).
  • the dewaxing conditions were identical to those used in Example 6.
  • the 0.8 mm (.03125 inch) catalyst resulted in a lower start-of-cycle temperature, its aging rate was equal to the 1.6 mm (.0625 inch) catalyst.
  • both the catalysts used in Example 6 were reactivated by treatment with hydrogen at about 482°C (900°F) for 24 hours. They were then recontacted with the same feedstock used in Example 6 under the exact same operating conditions, and the results are shown in Figure 4.
  • the 0.8 mm (.03125 inch) diameter catalyst represented by the solid line had a start-of-cycle temperature of 289°C (552°F) as compared to 293°C (560°F) for the 1.6 mm (.0625 inch) diameter catalyst.
  • the 0.8 mm (.03125 inch) diameter catalyst aged at 3.11°C (5.6°F) per day whereas the 1.6 mm (.0625 inch) diameter catalyst aged at 5.56°C (10°F) per day.
  • Example 8 Following the runs of Example 8 both catalysts were again reactivated by heating the same in the presence of hydrogen at 482°C (900°F) for 24 hours. The two catalysts were then used to dewax a bright stock having the properties set forth under Feed A in Table 1. The results of the experimentation are shown in Figure 5.
  • the catalyst of Example 4 extrudate catalyst had a start-of-cycle activity of 278°C (533°F) and aged at 1.67°C (3°F) per day.
  • the 0.60-0.84 mm (20/30 mesh) catalyst had a start-of-cycle activity of 278°C (532°F) and aged at only 0.83°C (1.5°F) per day. Going to even smaller particles gave a slight start-of-cycle activity benefit.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Catalysts (AREA)
  • Lubricants (AREA)

Claims (10)

1. Un procédé de déparaffinage d'une charge pétrolière dont le point d'ébullition est au moins égal à 371°C (700°F) et le point d'ébullition pour 50% du volume est au moins égal à 482°C (900°F), dans lequel on met cet hydrocarbure, en présence d'hydrogène alimenté à une température de 232 à 427°C (450 à 800°F) au contact d'un catalyseur de déparaffinage comprenant une zéolite à base d'aluminosilicate dont le rapport silice/alumine est supérieur à 12 et l'indice de contrainte est compris entre 1 et environ 12 et dans lequel cette zéolite d'aluminosilicate est associée à un liant formé d'un oxyde minéral, et est caractérisé en ce que l'on utilise un catalyseur composite présentant une distance maximum de diffusion inférieure à 0,6 mm (0,025 pouce).
2. Le procédé selon la revendication 1, caractérisé en ce que le catalyseur composite se trouve sous forme d'extrudat dont le diamètre est inférieur à environ 1,3 mm (0,05 pouce).
3. Le procédé selon la revendication 1, dans lequel le catalyseur composite se trouve sous forme d'un extrudat d'un diamètre d'environ 0,8 mm (0,03125 pouce).
4. Le procédé selon la revendication 1, dans lequel le materiau composite se trouve sous forme de perle ou sous une forme sphérique présentant une distance de diffusion maximum inférieure à 0,6 mm (0,025 pouce).
5. Le procédé selon la revendication 1, dans lequel le catalyseur composite se trouve sous la forme d'un extrudat façonné creusé en son centre ou sous une forme monolithique présentant une distance de diffusion maximum inférieure à 0,6 mm (0,025 pouce).
6. Le procédé selon la revendication 1, dans lequel le catalyseur composite est un extrudat trilobé ou quadrilobé dont la distance de diffusion maximum est inférieure à 0,6 mm (0,025 pouce).
7. Le procédé selon la revendication 1, dans lequel le catalyseur composite se trouve sous forme de pastille présentant une distance maximum de diffusion inférieure à environ 0,6 mm (0,025 pouce).
8. Le procédé selon la revendication 1, dans lequel l'oxyde minéral est l'un des suivants: alumine, silice, magnésie, titane ou leur association.
9. Le procédé selon l'une quelconque des revendications 1 à 8, dans lequel la zéolite est une ZSM-5.
10. Le procédé selon l'une quelconque des revendications 1 à 9, dans lequel le catalyseur composite inclut un composant d'hydrogénation.
EP85303639A 1984-06-08 1985-05-23 Procédé pour fabriquer des huiles lubrifiantes à partir de charge de départ lourde Expired EP0168146B1 (fr)

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US8030240B2 (en) * 2007-12-28 2011-10-04 Exxonmobil Research And Engineering Company Multiple molecular sieve catalyst for sour service dewaxing

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EP0104855A2 (fr) * 1982-09-27 1984-04-04 Mobil Oil Corporation Catalyseur et procédé d'hydrodéparaffinage

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US4448671A (en) * 1979-12-19 1984-05-15 Mobil Oil Corporation Selective sorption by zeolites
US4292166A (en) * 1980-07-07 1981-09-29 Mobil Oil Corporation Catalytic process for manufacture of lubricating oils
US4440630A (en) * 1982-02-08 1984-04-03 Mobil Oil Corporation Process for simultaneous hydrodesulfurization and hydrodewaxing with a catalyst of controlled pore size and metals content
US4443554A (en) * 1982-05-28 1984-04-17 Mobil Oil Corporation Activation of alkali metal zeolite catalysts by steaming
JPS5911635A (ja) * 1982-07-12 1984-01-21 Nec Corp 金属コ−テイング膜の製造方法

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EP0104855A2 (fr) * 1982-09-27 1984-04-04 Mobil Oil Corporation Catalyseur et procédé d'hydrodéparaffinage

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Publication number Publication date
ZA854354B (en) 1987-01-28
JPH0562160B2 (fr) 1993-09-07
EP0168146A1 (fr) 1986-01-15
IN164827B (fr) 1989-06-10
CA1248483A (fr) 1989-01-10
JPS614787A (ja) 1986-01-10
ES8605395A1 (es) 1986-03-16
BR8502735A (pt) 1986-02-12
DE3569262D1 (en) 1989-05-11
ES543976A0 (es) 1986-03-16
AU4275685A (en) 1985-12-12
AU581891B2 (en) 1989-03-09

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