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Hydro-fining catalyst roasted at low temperature and preparation method thereof

A hydrofining and low-temperature roasting technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of weakened interaction, decreased catalyst activity, etc., to reduce production costs, The effect of improving activity and stability

Inactive Publication Date: 2012-11-21
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of a calcination step, the interaction between the metal and the support is greatly weakened, resulting in a high initial activity of the catalyst, but as the reaction time prolongs, the active metal will gradually aggregate, the active sites will gradually decrease, and the activity of the catalyst will gradually decrease. Decrease, affecting the activity and stability of the catalyst

Method used

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  • Hydro-fining catalyst roasted at low temperature and preparation method thereof
  • Hydro-fining catalyst roasted at low temperature and preparation method thereof
  • Hydro-fining catalyst roasted at low temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 100g of modified aluminum hydroxide dry glue containing 2wt% fluorine and 6wt% zirconia, add 3g each of citric acid and scallop powder, and mix 5g of carbon black evenly, then add 90ml of dilute nitric acid solution with a concentration of 3%, and mix After homogenization, extrusion molding was carried out, and the obtained molding strips were dried at 120° C. for 4 hours and calcined at 550° C. for 4 hours to prepare carrier S-1. The properties of carrier S-1 are shown in Table 1.

[0022] Table 1 Physicochemical properties of carrier S-1

[0023]

[0024] Impregnate the catalyst carrier S-1 with an equal volume of impregnation solution containing an appropriate amount of molybdenum trioxide, basic nickel carbonate and phosphoric acid, dry the impregnated carrier at 120°C for 4 hours, and roast at 200°C for 4 hours to obtain catalyst C-1 . The prepared catalyst contains 22wt% molybdenum (calculated as oxide), 4wt% nickel (calculated as oxide) and 1.5wt% phos...

Embodiment 2

[0042] The modified aluminum hydroxide dry gel containing 4 wt% of silicon was used to repeat the preparation method of Example 1 to prepare the catalyst carrier S-2. The properties of the carrier S-2 are shown in Table 5.

[0043] Table 5 Physicochemical properties of carrier S-2

[0044]

[0045] Catalyst C-2 was prepared by impregnating catalyst carrier S-2 with an equal volume of impregnating solution containing appropriate amount of molybdenum trioxide, basic nickel carbonate and phosphoric acid, and the preparation method was repeated in Example 1. The prepared catalyst contains 20wt% molybdenum (calculated as oxide), 3.8wt% nickel (calculated as oxide) and 1.4wt% phosphorus (calculated as P 2 o 5 count).

Embodiment 3

[0054] Using the modified aluminum hydroxide dry gel containing 4wt% silicon and 6wt% titanium, the preparation method of Example 1 was repeated to prepare the catalyst carrier S-3. The properties of the carrier S-3 are shown in Table 8.

[0055] Table 8 Physicochemical properties of carrier S-3

[0056]

[0057] Catalyst C-3 was prepared by impregnating catalyst carrier S-3 with an equal volume of impregnating solution containing appropriate amount of molybdenum trioxide, basic nickel carbonate and phosphoric acid, and the preparation method was repeated in Example 1. The prepared catalyst contained 18wt% molybdenum (calculated as oxide), 3.5wt% nickel (calculated as oxide) and 1.4wt% phosphorus (calculated as P 2 o 5 count).

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Abstract

The invention discloses a hydro-fining catalyst roasted at a low temperature and a preparation method thereof. The preparation method comprises the following steps of: taking aluminum hydroxide dry glue or modified aluminum hydroxide dry glue as a raw material to prepare a catalyst carrier, then impregnating metal active components in VIB and VIII groups and preparing the hydro-fining catalyst through drying and roasting. The content of an alumina carrier is 60-90 weight percent, the content of metallic oxide in the VIB group is 5-35 weight percent, and the content of metallic oxide in the VIII group is 1-10 weight percent. An activity phase of the catalyst has proper stacking layer number and film crystal length, the interaction between the carrier and metal is reduced, the better dispersion state of the active components can be kept, and the HDS (Hydro-desulfurization) ability of sulfide difficult to remove in an oil product is improved. The hydro-fining catalyst is particularly suitable for the hydro-desulfurization of naphtha, the hydro-fining of inferior diesel oil and the hydro-treatment of FCC (Fluid Catalytic Cracking) raw materials or hydro-cracking raw materials and other distillate oil.

Description

Technical field: [0001] The invention relates to a hydrorefining catalyst and a preparation method thereof. The catalyst uses low-temperature roasting to decompose the precursor of the active component to control the dispersion performance of the active metal on the surface of the carrier and the interaction strength with the carrier to improve the activity and stability of the catalyst. , to reduce the preparation cost of the catalyst. The prepared catalyst has high desulfurization and denitrogenation activities, and is especially suitable for hydrofinishing of distillate oil, such as naphtha hydrodesulfurization, inferior diesel hydrofinishing, FCC feedstock or hydrocracking feedstock hydrotreating, etc. , which can meet the production requirements of clean oil hydrofining. Background technique: [0002] Hydrofining is an important process technology in petroleum processing. This technology is of great significance for improving the processing performance of secondary pro...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J27/188C10G45/08
Inventor 张孔远付兆霖刘晨光宋开畅
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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