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Foam metal hydrogenating catalyst and its preparing method and use

A technology of hydrogenation catalyst and metal foam, which is applied in the field of hydrogenation catalyst and its preparation, can solve the problems of low loading strength of active components, easy pollution, large amount of waste liquid, etc., and achieve good mechanical strength and thermal conductivity, and equipment investment The effect of less and higher surface area

Active Publication Date: 2006-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process will produce a large amount of waste liquid, which is easy to cause pollution, and the loading strength of the active components is not high, and it is easy to lose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation process of the hydrogenation catalyst of the present invention is described in detail with the noble metal active component being palladium:

[0037] 1) Preparation of aluminum foam carrier

[0038] 1. Use spray aluminum powder (industrial product) with a particle size of 200-250 mesh as raw material;

[0039] 2. Powder making: Dry NaCl powder with a particle size of 0.125 mm in an oven for 2 hours;

[0040] 3. Mixing: weigh aluminum powder, pore enhancer NaCl powder, and steel balls at a mass ratio of 2:1:10, add them to the universal ball mill and seal them, and fill them with N 2 protection, the mixing speed is 120r / m, and the mixing time is 1h to make a mixed powder;

[0041] 4. Forming and pressing: Put the mixed powder into the hydraulic press for pressing, the pressure is 300-500MPa, the pressing speed is 0.05m / s-0.02m / s, and the holding time is 3-5min;

[0042] 5. Sintering: put the pressed sample into a muffle furnace for sintering, and keep ...

Embodiment 2

[0049] The catalyst obtained in Example 1 was applied to the reaction of butynediol hydrogenation to generate butanediol. The porosity of the foam carrier is 80%, and the specific surface area is about 50m 2 / g, the catalytically active component is palladium, and the catalyst is made into a cylindrical shape of Φ5×5mm. The normal pressure activity evaluation device adopts a vertical Φ20mm bubbling reaction tube, the reaction tube is placed in a constant temperature water bath, and a flow meter is installed at the front. Start with H 2 Activate the catalyst at 120°C as the gas source, then lower it to 80°C, then add the reaction solution, and pass in H 2 , The reaction was carried out under the condition of maintaining a hydrogen pressure of 3.5 MPa. After a certain period of time, samples were taken and analyzed by gas chromatography. The results show that the single-pass conversion of butynediol reaches 80%, and the selectivity reaches 85%.

Embodiment 3

[0051] Using the method of Example 1, the aluminum foam catalyst of the present invention was prepared. The porosity of the foam carrier is 72%, the average pore diameter is 10μm, and the specific surface is about 80m 2 / g, its main active component is Pt, the content is 0.085%, and the degree of dispersion on the carrier is 48.7%, and the catalyst is made into a cylinder of Φ3×3mm;

[0052] The above catalyst is applied to the hydrogenation reaction of reformed raffinate, and the main composition of the raw material is C 5 ~C 8 , Distillation range 60~120℃, density 0.67~0.69g / cm 3 , the mass fraction of olefins is 1.5% to 5.0%, the mass fraction of aromatics is 1.0% to 3.0%, and the bromine index is 3500 to 5000 (the mg number of Br produced per 100g of oil, the same below.); Hydrogen: ordinary hydrogen grade cylinder hydrogen. Take 20ml catalyst, at operating pressure 0.2MPa, LHSV2.9h -1 , The volume ratio of hydrogen to oil is 340, and the reaction temperature is 180°C,...

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Abstract

The present invention discloses hydrogenating catalyst of foam metal and its preparation process and application. The hydrogenating catalyst includes foamed metal carrier and active noble metal component in effective amount supported onto the carrier, the carrier is prepared through powder metallurgical process, and the active component is supported via chemical plating process and distributed homogeneously on the port surfaces of the foamed carrier. The catalyst has the advantages of high catalytic activity, firm combination between the active component and the carrier, high stability, simple preparation process, high porosity of the carrier, great specific surface area, etc. in addition, the catalyst provides sufficient gas-liquid contact area, is favorable to mass transfer between gas phase and liquid phase, may be used in catalytic rectification and possesses both reaction and separation effects.

Description

technical field [0001] The present invention relates to a hydrogenation catalyst and its preparation method and application, in particular to a hydrogenation catalyst which takes metal foam as a substrate to support noble metal active components and its preparation method and application. Background technique [0002] Metal foam is a new type of material with a large number of pores in its internal structure. It not only has the characteristics of porous materials such as low density, high porosity, and large specific surface, but also has the basic characteristics of metals such as high mechanical strength, strong toughness, and good thermal conductivity. In the chemical industry, metal foams can be used as catalyst supports. The metal foam carrier can make the active components of the catalyst highly dispersed, and can more fully play the catalytic role, and its thermal conductivity is far better than that of the ceramic catalyst carrier. In addition, the metal foam itsel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/38B01J37/00C22C1/08
Inventor 刘智信李东风杨元一陈硕
Owner CHINA PETROLEUM & CHEM CORP
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