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Preparation and application of catalyst for selective hydrodesulfurization of gasoline

A hydrodesulfurization and catalyst technology, which is applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as increasing the difficulty of industrial operations, harsh carbon deposition modification requirements, and restricting industrial applications. , to achieve the effect of good activity stability, inhibition of catalyst carbon deposition, and enhanced adaptability

Active Publication Date: 2010-12-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this catalyst is that its complex and harsh carbon deposition modification requirements increase the difficulty of industrial operation and limit its industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ZrO 2 -Al 2 o 3 Preparation of composite carrier powder

[0033] Complex deposition method: ZrO in carrier 2 Relative to Al 2 o 3 10wt% as an example: weigh 32gZrOCl 2 ·8H 2 O was dissolved in 500ml of ethanol aqueous solution with a volume ratio of 1:1, 45ml of acetylacetone was added, and ammonia water was added dropwise to adjust the pH of the system to about 9.0 to obtain a bright yellow solution. Add 100g of Al after drying at 120°C to the solution 2 o 3 , after stirring at room temperature for 4h, the water bath was heated to 90°C, and the system solidified rapidly. Filtered, washed with water to free of Cl - Afterwards, air-dry for 12 hours and dry at 120° C. for 4 hours to obtain carrier powder.

[0034] Other different ZrO 2 The content of the composite support can be changed by proportionally changing the ZrOCl 2 ·8H 2 O, the amount of acetylacetone, prepared in the same way.

Embodiment 2

[0036] Preparation of catalyst support

[0037] With the ZrO that embodiment 1 makes 2 -Al 2 o 3 Grind and sieve the powder to below 100 mesh, then weigh 50g, add 10g of kaleidite, 1.25g of safflower powder, and 30ml of deionized water, knead evenly, and extrude with a Φ2.0mm clover orifice on a single-screw extruder. Stand for 1~4h, then dry at 120°C for 4h, and bake at 550°C for 4h. A shaped catalyst support is produced.

Embodiment 3

[0039] Preparation of Co-Mo co-immersion solution

[0040] Taking the catalyst carrier obtained in 100g of Example 2 as an example: first measure the water absorption rate of the catalyst carrier by conventional methods to 65ml / 100g carrier, and the solution preparation steps are: weigh 13g EDTA, add 40ml dilute ammonia water and stir to make it dissolve, and then successively Add 13g of cobalt nitrate and 15g of ammonium molybdate and stir to dissolve, then add 10g of ammonium dihydrogen phosphate and 15g of magnesium nitrate and stir to dissolve. Finally, adjust the volume to 65ml with ammonia water.

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PUM

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Abstract

The invention relates to preparation and application of a catalyst for selective hydrodesulfurization of gasoline. The catalyst comprises the following components in percentage by weight: 6 to 20 percent of CoO+MoO, 0.1 to 5 percent of K2O, 0.1 to 5 percent of MgO, 0.1 to 5 percent of P2O5, and the balance of ZrO2-Al2O3 composite carrier, wherein the ZrO2 accounts for 0.1 to 20 percent of the weight of the composite carrier. The preparation of the catalyst comprises the following steps of: preparing the composite carrier by adopting a complex precipitation method; adding sylvite, sesbania powder and de-ionized water into the composite carrier, uniformly mixing and kneading, extruding and drying the mixture at the temperature of between 100 and 150 DEG C and roasting the mixture at the temperature of between 450 and 550 DEG C to prepare a catalyst carrier; adding ammonia, EDTA (Ethylene Diamine Tetraacetic Acid) complexing agent to prepare stable Co-Mo co-immersion liquid which contains phosphorus and magnesium; and preparing the catalyst by using an isometric spraying immersion method. The catalyst has high selectivity and stability, and can reduce saturation of olefin to the utmost extent, and has a good desulfurization effect.

Description

technical field [0001] The invention relates to the preparation and application of a gasoline selective hydrodesulfurization catalyst. Background technique [0002] USP 4,140,626 discloses a class of catalysts with alumina and magnesia as supports, wherein it is recorded that a catalyst contains 3w% CoO, 16w% MoO 3 , 70w% MgO and 11w% Al 2 o 3 , the desulfurization rate is 96%, and the olefin saturation rate is 64%. The desulfurization selectivity is greatly improved compared with the traditional hydrodesulfurization catalyst. Industrial requirements for hydrogen reactions. [0003] USP 5,441,630 discloses a kind of use-hydrotalcite (HRIC) as carrier component to add Al 2 o 3 Among them, the calcined HRIC has a large surface area and is alkaline, and the catalyst after the carrier is impregnated with Co-Mo shows the characteristics of high HDS activity and low olefin saturation rate, but the octane number of gasoline still has a certain degree of loss. Based on the abo...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J37/02C10G45/08
Inventor 兰玲钟海军鞠雅娜张学军陈烈杭孙洪磊葛少辉刘坤红张振莉侯远东袁晓亮谭青峰
Owner PETROCHINA CO LTD
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