EP1835993A1 - Hydrocracking catalysts for vacuum gas oil&de-metalized blend - Google Patents

Hydrocracking catalysts for vacuum gas oil&de-metalized blend

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Publication number
EP1835993A1
EP1835993A1 EP05855836A EP05855836A EP1835993A1 EP 1835993 A1 EP1835993 A1 EP 1835993A1 EP 05855836 A EP05855836 A EP 05855836A EP 05855836 A EP05855836 A EP 05855836A EP 1835993 A1 EP1835993 A1 EP 1835993A1
Authority
EP
European Patent Office
Prior art keywords
catalytic
catalyst
support material
dmo
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05855836A
Other languages
German (de)
French (fr)
Inventor
Walid A. Al-Naeem
Shakeel Ahmed
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saudi Arabian Oil Co
Aramco Services Co
Original Assignee
Saudi Arabian Oil Co
Aramco Services Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saudi Arabian Oil Co, Aramco Services Co filed Critical Saudi Arabian Oil Co
Publication of EP1835993A1 publication Critical patent/EP1835993A1/en
Withdrawn legal-status Critical Current

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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
    • C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
    • C10G47/02—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used
    • C10G47/10—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used with catalysts deposited on a carrier
    • C10G47/12—Inorganic carriers
    • C10G47/16—Crystalline alumino-silicate carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/12—Silica and alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/88—Molybdenum
    • B01J23/883—Molybdenum and nickel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/005—Mixtures of molecular sieves comprising at least one molecular sieve which is not an aluminosilicate zeolite, e.g. from groups B01J29/03 - B01J29/049 or B01J29/82 - B01J29/89
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/03—Catalysts comprising molecular sieves not having base-exchange properties
    • B01J29/0308—Mesoporous materials not having base exchange properties, e.g. Si-MCM-41
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/041—Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/041—Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41
    • B01J29/042—Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41 containing iron group metals, noble metals or copper
    • B01J29/044—Iron group metals or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/041—Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41
    • B01J29/045—Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41 containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/16—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J29/166—Y-type faujasite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7007—Zeolite Beta
    • 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
    • C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C10G45/04—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used
    • C10G45/06—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof
    • C10G45/08—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof in combination with chromium, molybdenum, or tungsten metals, or compounds thereof
    • 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
    • C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C10G45/04—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used
    • C10G45/12—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing crystalline alumino-silicates, e.g. molecular sieves
    • 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
    • C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
    • C10G47/02—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used
    • C10G47/10—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used with catalysts deposited on a carrier
    • C10G47/12—Inorganic carriers
    • 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
    • C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
    • C10G47/02—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used
    • C10G47/10—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used with catalysts deposited on a carrier
    • C10G47/12—Inorganic carriers
    • C10G47/16—Crystalline alumino-silicate carriers
    • C10G47/20—Crystalline alumino-silicate carriers the catalyst containing other metals or compounds thereof
    • 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
    • C10G65/00—Treatment of hydrocarbon oils by two or more hydrotreatment processes only
    • C10G65/02—Treatment of hydrocarbon oils by two or more hydrotreatment processes only plural serial stages only
    • C10G65/12—Treatment of hydrocarbon oils by two or more hydrotreatment processes only plural serial stages only including cracking steps and other hydrotreatment steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/10—After treatment, characterised by the effect to be obtained
    • B01J2229/20—After treatment, characterised by the effect to be obtained to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/084—Y-type faujasite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/61—Surface area
    • B01J35/615—100-500 m2/g
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/20—Sulfiding

Definitions

  • This invention relates generally to the field of catalytic treatment of heavy hydrocarbons to produce desirable hydrocarbon products, in particular, a novel catalyst operable to catalytically treat de-metallized oil (DMO).
  • DMO de-metallized oil
  • the current invention includes a catalyst and a process for treating heavy hydrocarbons using the catalyst.
  • the catalyst is particularly useful for treating de- metallize oil (DMO) and is particularly useful in VGO/DMO hydrocarbon blend.
  • the catalyst acts to catalytically convert the VGO/DMO blend to shorter-chain valuable hydrocarbon products.
  • the catalyst includes a catalytic support material, a catalytic metal impregnated upon the catalytic support material, and a promoter metal on the catalytic support material to enhance catalytic conversion.
  • the combination of the catalytic support material with catalytic metal, also called active metal, and promoter metal is operable to catalytically convert VGO/DMO into hydrocarbon products having shorter carbon chains.
  • the catalytic metal component includes molybdenum and the promoter metal includes nickel.
  • one preferred embodiment includes ultra stable Y (USY) zeolite as the catalytic support material, ⁇ -alumina was used as binder for all catalyst prepared in this research. The amount of ⁇ -alumina used was around 70% of the total catalyst support for the test runs. In a particularly preferred embodiment, the USY zeolite is in an absence of ⁇ -zeolite.
  • USY ultra stable Y
  • a particularly preferred catalytic support material includes MCM-41 mesoporous material.
  • the catalytic support material is jS-zeolite.
  • the catalytic support material is amorphous silica alumina, also called ASA.
  • ASA has a non-uniform structure with low acidity and high surface area. The non-uniform structure tends to create acidic sites that are not available to large molecules, which leads to inferior performance of ASA alone as compared to MCM-41 or a combination of MCM-41 with ASA.
  • the USY and jS-zeolite supports suffer from drawbacks related to the microporous nature of the supports which makes the catalyst less efficient for large molecules since it is diffusion limited. These supports used alone tend to plug rapidly, thereby deactivating the catalyst.
  • the MCM-41 alone or in combination with USY or ⁇ - zeolite supports, overcomes these flaws.
  • the catalytic support material is solely ultra stable Y zeolite, MCM-41 mesoporous material, ⁇ - zeolite, amorphous silica alumina or combinations thereof.
  • a particularly preferred embodiment includes a single catalytic support material that is substantially all MCM- 41.
  • This material is mesoporous, that is, it is well-structured and has uniform morphology with high surface area. It also has low acidity as compared to beta and USY support materials.
  • the invention includes the use of proper support material and a balance between acidic and metallic function with the proper distribution of metals throughout the support material. This is accomplished through the very well- structured morphology features of MCM-42 support material, which contains both acidic and metallic site that are accessibile to the large hydrocarbon molecules found in VGO and DMO. For this reason, high conversion is achieved.
  • the lower acidity of MCM-41 as compared to other support materials drives conversion toward selectivity towards mid distillates and limits the production of undesirable light gases.
  • the catalytic metal is in a sulfide form.
  • molybdenum in the form of molybdenum sulfide is preferred.
  • tungsten sulfide is a preferred embodiment.
  • promoter metals include solely nickel, cobalt or combinations thereof.
  • the catalyst of the invention is particularly useful for VGO/DMO hydrocarbon blend contains at least 10% DMO by volume. Test runs have been made for VGO/DMO hydrocarbon blend contains at least 15% DMO by volume.
  • Impregnation of the catalytic metal and the promoter metal onto the catalytic support is accomplished through methods known in the art, such as through co- impregnation or successive impregnation.
  • the process of catalytically converting a heavy hydrocarbon containing de- metallized oil includes the steps of introducing the heavy hydrocarbon containing de- metallized oil into a reactor stage and introducing the catalyst into the reactor stage.
  • the catalyst introduced into the reactor stage includes the catalytic support material, the catalytic metal impregnated upon the catalytic support material, and the promoter metal on the catalytic support material, to enhance catalytic conversion.
  • the catalytic support material with catalytic metal and promoter metal operate to catalytically convert at least a portion of the de-metallized oil into hydrocarbon products having shorter carbon chains.
  • the process reaches and maintains a pre-defined temperature in the reactor operable to achieve conversion, hi a preferred embodiment, the pre-defined temperature is at least 390 degrees C. hi a more particularly preferred embodiment, the pre-defined temperature is at least 400 degrees C.
  • a majority of the pores of the catalyst support are located within 20 to 50 Angstrom ( 0 A) and the catalyst support has a large surface area as measured through pore size distribution.
  • Table 1 shows examples of preferred embodiments.
  • NiMo-MCM-41 showed higher hydrodesulfurization (HDS) and hydrogenation activities, rn addition, it had higher conversion and higher diesel yield than commercial catalyst.
  • Most of the hydrocracking catalysts of commercial interest are dual functional in nature, consisting of both a hydrogenation-dehydrogenation component and an acidic support. The reactions catalyzed by the individual components are quite different. In specific catalysts, the relative strengths of the two components can be varied. The reactions occurring and the products formed are influenced by the balance between these two components. [0022] TABLE 2 Acidity for all prepared catalysts
  • Table 4-2 shows the TPD of ammonia for all of the prepared hydrocracking catalysts.
  • the acidity of the prepared catalysts ranges from 0.33 mmol/g (NiMo- MCM-41) to 0.59 mmol/g (NiMo-USY).
  • the lower acidity of NiMo-MCM-41 catalyst is expected since MCM-41 is a sililca based material and has low amount of alumina. Therefore, NiMo-MCM-41 catalyst has lower amount of ⁇ -alumina than the other prepared catalysts.
  • the catalytic metal, such as molybdenum, and the promoter metal provide the hydro genation-dehydrogenation functions. As noted, this is preferably in the sulfide form.
  • group VIA and group VIIIA metals are useful as promoter metal and catalytic metal. These metals catalyze the hydrogenation of the feedstock, making it more reactive for cracking and heteroatom removal, as well as reducing the coking rate. They also initiate the cracking by forming a reactive olefin intermediate via dehydrogenation.
  • hydrocracking of industrial feedstocks is to be carried in presence of hydrogen sulfide and organic sulfur compounds, it is preferred that the metal site be in a metal sulfide form of the VIA group promoted by a nickel or cobalt sulfide.
  • the reactions that occur during the hydrocracking process take three major routes. First, non-catalytic thermal cleavage of C-C bonds via hydrocarbon radicals, with hydrogen addition (hydropyrolysis). Second, monofunctional C-C bond cleavage with hydrogen addition over hydrogenation components consisting of metals, oxides or sulfides (hydro genolysis).
  • bifunctional C-C bond cleavage with hydrogen addition over bifunctional catalysts consisting of a hydrogenation component dispersed on a porous, acidic support.
  • bifunctional catalysts consisting of a hydrogenation component dispersed on a porous, acidic support.
  • hydrodesulfurization hydrodesulfurization, hydrodeintrofication, hydrodeoxigenation, olefin hydrogenation and partial aromatic hydrogenation.
  • the commercial catalyst that was used for comparison is DHC-8 from Universal Oil
  • ⁇ -alumina was used as binder for all catalyst prepared in this test shown above.
  • the amount of ⁇ -alumina used was 70% of the total catalyst support.
  • NiMo-MCM-41 catalyst had the lowest acidity and the highest surface area. This is attributed to the fact that MCM-41 is a silica-based material and has low amounts of alumina. This is one of the advantages of MCM-41 being mesoporous and having low acidity. The mesoporous feature along with the lower acidity of NiMo-MCM-41 catalyst promotes the highest conversion and the lowest gas make.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
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Abstract

This invention relates to a catalyst and a process for treating heavy hydrocarbons using the catalyst. The catalyst is useful for treating heavy hydrocarbons, de-metallize oil (DMO) and is particularly useful in VGO/DMO hydrocarbon blend. It is also useful for DAO. The catalyst acts to catalytically convert the VGO/DMO blend to shorter-chain valuable hydrocarbon products. The catalyst includes a catalytic support material, a catalytic metal impregnated upon the catalytic support material, and a promoter metal on the catalytic support material to enhance catalytic conversion. The combination of the catalytic support material with catalytic metal and promoter metal is operable to catalytically convert VGO/DMO into hydrocarbon products having shorter carbon chains.

Description

HYDROCRACKING CATALYSTS FOR VACUUM GAS OIL & DE-METALIZED BLEND
BACKGROUND OF THE INVENTION
Related Applications [0001] This patent application claims priority to U.S. Provisional Patent Application Serial No. 60/639,909 filed on December 29, 2004, which is incorporated by reference in its entirety.
Technical Field of the Invention
[0002] This invention relates generally to the field of catalytic treatment of heavy hydrocarbons to produce desirable hydrocarbon products, in particular, a novel catalyst operable to catalytically treat de-metallized oil (DMO).
Description of the Prior Art
[0003] The flexibility of hydrocracking as a process for refining petroleum has resulted in its phenomenal growth during the past 15 years. Through catalytic treatment, feedstocks can be converted to lower boiling or more desirable products. Hydrocarbon feedstocks suitable for such treatment range from residue to naphtha. Products include such widely diverse materials such as gasoline, kerosene, middle distillates, lubricating oils, fuel oils, and various chemicals. [0004] Commercial hydrocracking is typically carried out in a single stage reactor or in a two-stage reactor with the stages in series. Numerous hydrocracking catalysts have been explored to treat various hydrocarbons, to reduce undesirable side effects of the catalytic treatment and/or to extend the life of the catalyst. Development has also led to catalysts suitable for severe operating conditions. Efforts for cost effectiveness are ongoing. The choice of catalysts and of the particular process scheme will depend on many factors such as feed properties, desired products properties, size of the hydrocracking unit, and various other economic considerations. [0005] While hydrocracking has been investigated in the past for the purpose of hydrocracking medium and heavy vacuum gas oil (VGO), there is a need to address heavier and different hydrocarbons such as de-asphalted oil (DAO) or de-metallized oil (DMO) to convert this into suitable product for gasoline lines, jet fuels and diesel oils according to geographical and seasonal variations in demand. LPG and lubricating bases would also be desirable products. A catalyst would be advantageous that is capable of handling large hydrocarbon molecules and heavy poly-aromatic molecules, in particular, DMO. A catalyst that can process VGO/DMO feed blend would be particularly advantageous. As it is notable that the world market is tending toward heavier hydrocarbons, a catalyst suitable for such heavy hydrocarbons would be advantageous.
SUMMARY OF THE INVENTION
[0006] The current invention includes a catalyst and a process for treating heavy hydrocarbons using the catalyst. The catalyst is particularly useful for treating de- metallize oil (DMO) and is particularly useful in VGO/DMO hydrocarbon blend. The catalyst acts to catalytically convert the VGO/DMO blend to shorter-chain valuable hydrocarbon products. The catalyst includes a catalytic support material, a catalytic metal impregnated upon the catalytic support material, and a promoter metal on the catalytic support material to enhance catalytic conversion. The combination of the catalytic support material with catalytic metal, also called active metal, and promoter metal is operable to catalytically convert VGO/DMO into hydrocarbon products having shorter carbon chains. [0007] In a preferred embodiment, the catalytic metal component includes molybdenum and the promoter metal includes nickel.
[0008] Regarding the catalytic support materials, one preferred embodiment includes ultra stable Y (USY) zeolite as the catalytic support material, γ-alumina was used as binder for all catalyst prepared in this research. The amount of γ-alumina used was around 70% of the total catalyst support for the test runs. In a particularly preferred embodiment, the USY zeolite is in an absence of γ-zeolite.
[0009] A particularly preferred catalytic support material includes MCM-41 mesoporous material. [0010] In another preferred embodiment, the catalytic support material is jS-zeolite. In yet another preferred embodiment, the catalytic support material is amorphous silica alumina, also called ASA. ASA has a non-uniform structure with low acidity and high surface area. The non-uniform structure tends to create acidic sites that are not available to large molecules, which leads to inferior performance of ASA alone as compared to MCM-41 or a combination of MCM-41 with ASA. Similarly, the USY and jS-zeolite supports suffer from drawbacks related to the microporous nature of the supports which makes the catalyst less efficient for large molecules since it is diffusion limited. These supports used alone tend to plug rapidly, thereby deactivating the catalyst. The MCM-41, alone or in combination with USY or β- zeolite supports, overcomes these flaws. In a preferred embodiment, the catalytic support material is solely ultra stable Y zeolite, MCM-41 mesoporous material, β- zeolite, amorphous silica alumina or combinations thereof. A particularly preferred embodiment includes a single catalytic support material that is substantially all MCM- 41. This material is mesoporous, that is, it is well-structured and has uniform morphology with high surface area. It also has low acidity as compared to beta and USY support materials. The invention includes the use of proper support material and a balance between acidic and metallic function with the proper distribution of metals throughout the support material. This is accomplished through the very well- structured morphology features of MCM-42 support material, which contains both acidic and metallic site that are accessibile to the large hydrocarbon molecules found in VGO and DMO. For this reason, high conversion is achieved. Advantageously the lower acidity of MCM-41 as compared to other support materials drives conversion toward selectivity towards mid distillates and limits the production of undesirable light gases.
[0011] In a preferred embodiment of the invention, the catalytic metal is in a sulfide form. For example, molybdenum in the form of molybdenum sulfide is preferred. Similarly, when tungsten is used as the catalytic metal, tungsten sulfide is a preferred embodiment.
[0012] In a preferred embodiment, promoter metals include solely nickel, cobalt or combinations thereof. [0013] The catalyst of the invention is particularly useful for VGO/DMO hydrocarbon blend contains at least 10% DMO by volume. Test runs have been made for VGO/DMO hydrocarbon blend contains at least 15% DMO by volume. [0014] Impregnation of the catalytic metal and the promoter metal onto the catalytic support is accomplished through methods known in the art, such as through co- impregnation or successive impregnation.
[0015] The process of catalytically converting a heavy hydrocarbon containing de- metallized oil includes the steps of introducing the heavy hydrocarbon containing de- metallized oil into a reactor stage and introducing the catalyst into the reactor stage. The catalyst introduced into the reactor stage includes the catalytic support material, the catalytic metal impregnated upon the catalytic support material, and the promoter metal on the catalytic support material, to enhance catalytic conversion. The catalytic support material with catalytic metal and promoter metal operate to catalytically convert at least a portion of the de-metallized oil into hydrocarbon products having shorter carbon chains.
[0016] The process reaches and maintains a pre-defined temperature in the reactor operable to achieve conversion, hi a preferred embodiment, the pre-defined temperature is at least 390 degrees C. hi a more particularly preferred embodiment, the pre-defined temperature is at least 400 degrees C.
[0017] In a preferred embodiment, a majority of the pores of the catalyst support are located within 20 to 50 Angstrom (0A) and the catalyst support has a large surface area as measured through pore size distribution. Table 1 shows examples of preferred embodiments.
TABLE 1 Prepared Catalysts Textual Characteristics
Brief Description of the Drawings
[0018] So that the manner in which the features, advantages and objects of the invention, as well as others that will become apparent, may be understood in more detail, more particular description of the invention briefly summarized above may be had by reference to the embodiment thereof which is illustrated in the appended drawings, which form a part of this specification. It is to be noted, however, that the drawings illustrate only a preferred embodiment of the invention and is therefore not to be considered limiting of the invention's scope as it may admit to other equally effective embodiments. [0019] Figure 1 depicts a schematic of a preferred embodiment of the process with the catalyst of the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0020] Several catalysts were prepared using nickel (Ni) / molybdenum (Mo) metals loadings along with the four different support materials identified above. The four catalyst formulations created in this manner were characterized using gas sorption analyzer, temperature programmed reduction (TPR) and temperature programmed de- sorption (TPD). Moreover, the catalyst formulations were tested in a batch reactor and compared against a commercial catalyst. The outcome of this work showed that the formulation including MCM-41 catalyst support, resulting in NiMo-MCM-41, has performed better than the commercial catalyst on heavy hydrocarbons, in particular, VGO/DMO blends. The other three formulation of the catalyst of the invention also provided superior performance. NiMo-MCM-41 showed higher hydrodesulfurization (HDS) and hydrogenation activities, rn addition, it had higher conversion and higher diesel yield than commercial catalyst. [0021] Most of the hydrocracking catalysts of commercial interest are dual functional in nature, consisting of both a hydrogenation-dehydrogenation component and an acidic support. The reactions catalyzed by the individual components are quite different. In specific catalysts, the relative strengths of the two components can be varied. The reactions occurring and the products formed are influenced by the balance between these two components. [0022] TABLE 2 Acidity for all prepared catalysts
[0023] Table 4-2 shows the TPD of ammonia for all of the prepared hydrocracking catalysts. The acidity of the prepared catalysts ranges from 0.33 mmol/g (NiMo- MCM-41) to 0.59 mmol/g (NiMo-USY). The lower acidity of NiMo-MCM-41 catalyst is expected since MCM-41 is a sililca based material and has low amount of alumina. Therefore, NiMo-MCM-41 catalyst has lower amount of γ-alumina than the other prepared catalysts. [0024] The catalytic metal, such as molybdenum, and the promoter metal provide the hydro genation-dehydrogenation functions. As noted, this is preferably in the sulfide form. Other group VIA and group VIIIA metals are useful as promoter metal and catalytic metal. These metals catalyze the hydrogenation of the feedstock, making it more reactive for cracking and heteroatom removal, as well as reducing the coking rate. They also initiate the cracking by forming a reactive olefin intermediate via dehydrogenation.
[0025] Since hydrocracking of industrial feedstocks is to be carried in presence of hydrogen sulfide and organic sulfur compounds, it is preferred that the metal site be in a metal sulfide form of the VIA group promoted by a nickel or cobalt sulfide. [0026] The reactions that occur during the hydrocracking process take three major routes. First, non-catalytic thermal cleavage of C-C bonds via hydrocarbon radicals, with hydrogen addition (hydropyrolysis). Second, monofunctional C-C bond cleavage with hydrogen addition over hydrogenation components consisting of metals, oxides or sulfides (hydro genolysis). Third, bifunctional C-C bond cleavage with hydrogen addition over bifunctional catalysts consisting of a hydrogenation component dispersed on a porous, acidic support. In addition to the above reactions, there are other reactions that take place during the hydrocracking process. These can include hydrodesulfurization, hydrodeintrofication, hydrodeoxigenation, olefin hydrogenation and partial aromatic hydrogenation.
[0027] TABLE 3 Experimental Design
[0028]
The commercial catalyst that was used for comparison is DHC-8 from Universal Oil
Products (UOP) company, γ-alumina was used as binder for all catalyst prepared in this test shown above. The amount of γ-alumina used was 70% of the total catalyst support.
TABLE 3-2 Feedstock Definition
TABLE 4-7 Tested catalysts conversion for 800 - 900 0F cut and 900 - 1050 0F cut
[0029] Among the four catalyst formulations described above that are encompassed within the invention, NiMo-MCM-41 catalyst had the lowest acidity and the highest surface area. This is attributed to the fact that MCM-41 is a silica-based material and has low amounts of alumina. This is one of the advantages of MCM-41 being mesoporous and having low acidity. The mesoporous feature along with the lower acidity of NiMo-MCM-41 catalyst promotes the highest conversion and the lowest gas make.
[0030] While the invention has been shown or described in only some of its forms, it should be apparent to those skilled in the art that it is not so limited, but is susceptible to various changes without departing from the scope of the invention.

Claims

We claim:
1. A catalyst for treating VGO/DMO hydrocarbon blend to catalytically convert the VGO/DMO blend to shorter-chain valuable hydrocarbon products, the catalyst comprising:
a catalytic support material comprising MCM-41 mesoporous material,
a catalytic metal impregnated upon the catalytic support material, and,
a promoter metal on the catalytic support material to enhance catalytic conversion,
the catalytic support material with catalytic metal and promoter metal operable to catalytically convert VGO/DMO into hydrocarbon products having shorter carbon chains.
2. The catalyst of claim 1 wherein the catalytic metal component is molybdenum and the promoter metal is nickel.
3. The catalyst of any of the proceeding claims wherein the catalytic support material includes ultra stable Y zeolite.
4. The catalyst of claim 1 or 2 wherein the catalytic support material is solely MCM- 41 mesoporous material.
5. The catalyst of claim 1 or 2 wherein the catalytic support material includes β- zeolite.
6. The catalyst of claim 1 or 2 wherein the catalytic support material includes amorphous silica alumina.
7. The catalyst of claim 1 or 2 wherein the catalytic support material is selected from the group consisting of ultra stable Y zeolite, MCM-41 mesoporous material, β- zeolite, amorphous silica alumina, and combinations thereof.
8. The catalyst of claim 2 wherein at least a portion of the nickel is in the form of nickel sulfide.
9. The catalyst of any of the preceeding claims wherein the catalytic metal component is selected from the group consisting of molybdenum, tungsten and combinations thereof, and wherein the promoter metal is selected from a group consisting of nickel, cobalt and combinations thereof.
10. The catalyst of claim 9 wherein at least a portion of the nickel is in the form of nickel sulfide.
11. The catalyst of claim 9 wherein at least a portion of the cobalt is in the form of cobalt sulfide.
12. The catalyst of any of the preceeding claims wherein the VGO/DMO hydrocarbon blend contains at least 10% DMO by volume.
13. The catalyst of any of the preceeding claims wherein the VGO/DMO hydrocarbon blend contains at least 15% DMO by volume.
14. The catalyst of any of the preceeding claims wherein the catalytic metal and the promoter metal are impregnated upon the catalytic support through co-impregnation.
15. The catalyst of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 or 13 wherein the catalytic metal and the promoter metal are impregnated upon the catalytic support through successive impregnation.
16. The process of catalytically converting a heavy hydrocarbon containing de- metallized oil comprising the steps of: Introducing the heavy hydrocarbon containing de-metallized oil into a reactor stage,
Introducing the catalyst into the reactor stage, the catalyst comprising:
a catalytic support material comprising MCM-41 mesoporous material,
a catalytic metal impregnated upon the catalytic support material, and,
a promoter metal on the catalytic support material to enhance catalytic conversion,
the catalytic support material with catalytic metal and promoter metal operable to catalytically convert at least a portion of the de-metallized oil into hydrocarbon products having shorter carbon chains.
17. The process of claim 16 wherein the catalytic metal component is molybdenum and the promoter metal is nickel.
18. The catalyst of claim 16 or 17 wherein the catalytic support material includes ultra stable Y zeolite.
19. The process of claim 16 or 17 wherein the catalytic support material is solely MCM-41 mesoporous material.
20. The process of claim 16, 17 or 18 wherein the catalytic support material includes /3-zeolite.
21. The process of claim 16, 17 or 18 wherein the catalytic support material includes amorphous silica alumina.
22. The process of claim 16 or 17 wherein the catalytic support material is selected from the group consisting of ultra stable Y zeolite, MCM-41 mesoporous material, β- zeolite, amorphous silica alumina, and combinations thereof.
23. The process of any of the preceeding claims wherein the catalytic metal component is selected from the group consisting of nickel, cobalt and combinations thereof, and wherein the promoter metal is selected from a group consisting of molybdenum, tungsten and combinations thereof.
24. The process of any of the preceeding claims wherein the VGO/DMO hydrocarbon blend contains at least 10% DMO by volume.
25. The process of any of the preceeding claims wherein the VGO/DMO hydrocarbon blend contains at least 15% DMO by volume.
26. The process of claims 17 or 23 wherein at least a portion of the nickel is in the form of nickel sulfide.
27. The process of claims 23 wherein at least a portion of the cobalt is in the form of cobalt sulfide.
28. The process of claim 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 or 27 wherein the catalytic metal and the promoter metal are impregnated upon the catalytic support through co-impregnation.
29. The process of claim 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 or 27 wherein the catalytic metal and the promoter metal are impregnated upon the catalytic support through successive impregnation.
30. The process of claim 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 or 29 further comprising the step of maintaining a pre-defined temperature in the reactor.
31. The process of claim 30 wherein the pre-defined temperature is at least 390 degrees C.
32. The process of claim 30 wherein the pre-defined temperature is at least 400 degrees C.
EP05855836A 2004-12-29 2005-12-29 Hydrocracking catalysts for vacuum gas oil&de-metalized blend Withdrawn EP1835993A1 (en)

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