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Dispersed metal sulfide-based catalysts

a technology of dispersed metal sulfide and catalyst, which is applied in the direction of catalyst activation/preparation, metal/metal-oxide/metal-hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of increased cost, increased dispersed catalytic solids or oil-soluble compounds, and increased activity of catalysts

Inactive Publication Date: 2009-01-22
INTREVEP SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deposition of solids in the surface of this kind of catalyst produces an activity loss, and this loss is even greater with heavy and extra heavy feeds to the upgrading procedure.
However, the need to disperse the catalytic solids or oil-soluble compounds makes for increased cost.

Method used

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  • Dispersed metal sulfide-based catalysts

Examples

Experimental program
Comparison scheme
Effect test

example 1

Molybdenum Emulsion

[0047]An aqueous solution containing catalytic precursors was prepared from ammonium heptamolybdate (AHM) [(NH4)6Mo7O24.4H2O]. The aqueous solution was prepared having a concentration of 1-14 wt % in sour water. For this example, the concentration was 10 wt %. The sour water was prepared using ammonium sulfide [(NH4)2S] at a concentration of 0.1-14% wt. For this example, the concentration was 0.2 wt %. The AHM reacts with ammonium sulfide to generate soluble oxy-sulfurs.

[0048]A w / o emulsion was prepared using a ratio of mass of surfactant to total mass of the emulsion (γ) between 0 and 0.01 and a ratio by mass of oil to combined mass of aqueous solution and oil ({acute over (α)}) of between 0.7 and 0.94. The aqueous solution and the oil phase can be formed into an emulsion without surfactants (only natural surfactants contained in the oil, such as resins or naphthenic acids contained in HVGO), or using a non-ionic surfactant with an Hydrophilic-Lipophilic Balance ...

example 2

Nickel Emulsion

[0053]A water-oil emulsion was prepared from nickel acetate [Ni(CH3COO)2.H2O] aqueous solution (7-14% wt) and HVGO or HHGO, with or without non-ionic surfactant. The relationships γ and {acute over (α)} were the same as for the w / o molybdenum emulsion, between 0-0.01 and 0.70-0.94 respectively. Table 3 shows the component preferred ranges of the emulsion and their concentration in the mixture, as well as specific values for this example.

TABLE 3Component(% wt / wt)[Ni (CH3 COO)2•H2O] aqueous 6.00-30.00solution 7-14%(0.2%)Surfactant  0-1.00HVGO / HHGO73.00-90.70[Ni (CH3COO)2•H2o] aqueous solution26.31Surfactant0.90HVGO / HHGO72.78

[0054]The preparation parameters and control quality methods applied for the water-oil nickel emulsion coincide with those that have been applied for the molybdenum emulsion. FIGS. 4a and 4b show the droplet diameter size distribution and a digitalized optical image of the nickel emulsion, respectively. The droplets have an average diameter of 2.7 μm...

example 3

Bi-Metallic Catalyst Synthesis

[0056]The synergy effect of NiMoS supported catalyst is well known. However, this effect is not evident in dispersed catalyst systems. Due to this fact, thermal decomposition of the simultaneous nickel and molybdenum water-oil emulsions was tested. The ratio of Ni / Ni+Mo was changed from 0 to 1 and HDS activity measured at different points in this range. FIG. 5 shows HDS activity results for solids obtained from simultaneous thermal decomposition. It is clear that Ni enhances the performance of Mo catalyst and the maximal synergistic effect was found at a ratio of 0.1. HTEM results evidenced particle size in the range of the previous described particles (Mo—S and Ni—S).

[0057]It should be appreciated that a new catalyst system has been provided in accordance with invention which produces fine or ultra-dispersed catalyst particles and thereby greatly enhances hydroconversion activity of the catalyst when exposed to a suitable feed stock. It should also be ...

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Abstract

The invention provides a catalyst composition, which includes an emulsion of an aqueous phase in an oil phase, wherein the aqueous phase comprises an aqueous solution containing a group 6 metal and a group 8, 9 or 10 metal. The metals can be provided in two separate emulsions, and these emulsions are well suited for treating hydrocarbon feedstocks.

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to hydroconversion catalysts and, more particularly, to synthesis of a dispersed catalyst which is useful for deep catalytic hydrocarbon conversion.[0002]Various catalytic industrial processes apply supported heterogeneous catalysts. These catalysts contain dispersed metallic active species over high surface area and / or on an acidic support. The deposition of solids in the surface of this kind of catalyst produces an activity loss, and this loss is even greater with heavy and extra heavy feeds to the upgrading procedure.[0003]Additionally there are slurry technologies, which are characterized by the presence of very small catalyst particles effectively dispersed in the medium. Catalyst can be fed as powder (U.S. Pat. No. 4,303,634) or as oil-soluble precursors (U.S. Pat. No. 4,470,295) such as molybdenum naphthenate. However, the need to disperse the catalytic solids or oil-soluble compounds makes for increased cost.[0004]The ne...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07C5/00B01J27/043B01J27/051B01J23/24B01J23/38
CPCB01J23/85B01J23/88B01J23/883B01J27/049C10G45/08B01J27/0515B01J35/0013B01J37/082B01J27/051B01J35/45B01J35/23
Inventor PEREIRA, PEDRORIVAS, GUAICAIPUROCORDOVA, JOSEGRANADILLO, FRANCISCOMARZIN, ROGERSOLARI, BRUNOZACARIAS, LUIS
Owner INTREVEP SA
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