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Platinum and palladium containing bimetallic catalyst, preparation method therefor, application of platinum and palladium containing bimetallic catalyst and aromatic-hydrocarbon saturation method

A bimetallic catalyst and catalyst technology are applied in the field of aromatic hydrocarbon saturation methods to achieve the effects of improved relative activity, high aromatic hydrocarbon saturation activity and anti-sulfur performance

Active Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But, the aromatic hydrocarbon saturation activity and anti-sulfur activity of the catalyst prepared by above-mentioned disclosed method still have great room for improvement and improvement

Method used

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  • Platinum and palladium containing bimetallic catalyst, preparation method therefor, application of platinum and palladium containing bimetallic catalyst and aromatic-hydrocarbon saturation method
  • Platinum and palladium containing bimetallic catalyst, preparation method therefor, application of platinum and palladium containing bimetallic catalyst and aromatic-hydrocarbon saturation method

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preparation example Construction

[0018] The invention provides a kind of preparation method of the bimetallic catalyst containing platinum and palladium, and this preparation method comprises the following steps:

[0019] 1) impregnating the carrier with a solution containing a palladium compound, then drying, roasting and reducing the impregnated carrier in sequence to obtain a palladium-containing single metal catalyst precursor;

[0020] 2) impregnating the palladium-containing monometallic catalyst precursor obtained in step 1) with a solution containing a platinum compound in a reducing atmosphere, and then drying to remove the solvent.

[0021] According to the present invention, the palladium compound in the solution containing the palladium compound can be various soluble compounds of palladium, preferably a water-soluble salt of palladium or chloropalladium acid, more preferably Pd(NH 3 ) 4 (NO 3 ) 2 , Pd(NH 3 ) 4 Cl 2 、H 2 PdCl 4 one or more of.

[0022] The concentration of the palladium c...

Embodiment 1

[0046] This example is used to illustrate the catalyst provided by the present invention and its preparation method.

[0047] Weigh 0.476 g of Pd(NH 3 ) 4 (NO 3 ) 2 Dissolve in deionized water to prepare an impregnation solution with a Pd atomic concentration of 2.95 g / L, and impregnate to 72 g of SiO in equal volume 2 -Al 2 o 3 The carrier (prepared with reference to Example 2 of CN201110139331.X) was dried at 120°C after standing for 3 hours, calcined at 450°C for 4 hours, hydrogen reduced at 450°C for 4 hours, and the hydrogen pressure was 0.1 MPa. After reduction, it was cooled to room temperature, and 85 milliliters of dissolved 0.736 gram of Pt(NH 3 ) 4 (NO 3 ) 2 The aqueous solution (containing Pt atomic concentration is 4.36 grams per liter), and continues to pass reducing gas bubbling, and hydrogen flow rate is 50 milliliters per minute, until solution is blown dry, and the catalyst obtained is denoted as R1, and its composition is shown in Table 1.

Embodiment 2

[0053] This example is used to illustrate the catalyst provided by the present invention and its preparation method.

[0054] Get 100 grams of USY molecular sieves (produced by Changling Catalyst Factory, sodium oxide content is 0.8% by weight) and add 1000 milliliters of 8.0% by weight ammonium chloride solution, carry out ion exchange for 2 hours under stirring at 90 ° C, filter, and wash with deionized water until Chloride-free, drying at 120° C. for 4 hours to obtain USY molecular sieve A with a sodium oxide content of 0.3% by weight.

[0055] Weigh 60 grams of USY molecular sieve A (dry basis weight) and 120 grams of pseudoboehmite (dry basis weight, produced by Changling Catalyst Factory) and mix evenly, add deionized water and knead, and extrude into a circumscribed circle with a diameter of 1.4 Millimeter trefoil strips, dried at 120°C for 4 hours and calcined at 600°C for 4 hours to obtain the catalyst carrier USY / Al 2 o 3 .

[0056] Weigh 0.952 g of Pd(NH 3 ) 4 ...

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Abstract

The invention relates to a platinum and palladium containing bimetallic catalyst, a preparation method therefor and an application of the platinum and palladium containing bimetallic catalyst. The preparation method for the catalyst comprises the following steps: (1) impregnating a carrier with a solution containing a palladium compound, and then, subjecting the impregnated carrier to baking, roasting and reduction sequentially, so as to obtain a palladic monometallic catalyst precursor; and (2) impregnating the palladic monometallic catalyst precursor obtained in the step (1) with a solution containing a platinum compound in a reducing atmosphere, and then, carrying out drying so as to remove the solvent. Compared with catalysts which are prepared in the prior art and have the same noble-metal content, the catalyst provided by the invention has better aromatic-hydrocarbon saturation activity.

Description

technical field [0001] The present invention relates to a preparation method of a bimetallic catalyst containing platinum and palladium, the bimetallic catalyst containing platinum and palladium prepared by the method and the application and use of the bimetallic catalyst containing platinum and palladium in aromatic hydrocarbon hydrogenation saturation The platinum and palladium containing bimetallic catalyst aromatic hydrocarbon saturation process. Background technique [0002] With the development of the world economy, the demand for middle distillates (including kerosene, diesel and fuel oil) is increasing day by day. It is impossible to meet this demand with straight-run diesel alone; this requires the transfer of secondary processed diesel, such as catalytic cracking diesel and coker diesel. However, secondary processed diesel oil contains a large amount of sulfur, nitrogen and aromatics. At present, sulfur and nitrogen can be removed by traditional sulfide catalysts....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J29/12C10G45/52C10G45/54C10G49/06C10G49/08
Inventor 郑仁垟张润强李会峰李明丰
Owner CHINA PETROLEUM & CHEM CORP
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