Supported bimetallic catalyst and preparation method thereof, and glycerol hydrogenolysis reaction method

A bimetallic catalyst, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effect of good glycerol hydrogenolysis activity

Active Publication Date: 2018-10-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many reports in the literature, there is still a lot of room for improvement and improvement in the activity and selectivity of the catalyst for hydrogenolysis of glycerol.

Method used

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  • Supported bimetallic catalyst and preparation method thereof, and glycerol hydrogenolysis reaction method
  • Supported bimetallic catalyst and preparation method thereof, and glycerol hydrogenolysis reaction method
  • Supported bimetallic catalyst and preparation method thereof, and glycerol hydrogenolysis reaction method

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preparation example Construction

[0026] According to another aspect of the present invention, the present invention also provides a preparation method of a supported bimetallic catalyst, the method comprising the steps of:

[0027](1) impregnate the carrier with a solution containing a compound of the first metal component selected from Pt and\or Pd, then dry the impregnated carrier successively, roast or not roast, and reductively activate to obtain the first metal component containing catalyst precursor;

[0028] (2) impregnating the catalyst precursor obtained in step (1) with a solution containing a compound of a second metal component selected from Group VIB and / or VIIB in a hydrogen-containing gas atmosphere, followed by drying and optional roasting, Obtain the supported bimetallic catalyst;

[0029] Wherein, the impregnation conditions in the step (2) include: the temperature is 100-300° C., the time is 0.1-24 hours, and the hydrogen partial pressure is 0.5-10 MPa.

[0030] The compound of the first ...

Embodiment 1

[0049] This example is used to illustrate the catalyst provided by the present invention and its preparation method.

[0050] According to the required metal salt content of equal volume impregnation method, be prepared with the impregnation solution of 30.6 milliliters of dichlorotetraammine platinum containing 23.5 g / liter of platinum. Decant the impregnation solution to 36 g γ-Al 2 o 3 Carrier (product of Changling Catalyst Factory, particle size 20-40 mesh, the same below), stir well at 20°C, let stand for 4 hours, dry at 120°C, roast at 350°C for 4 hours, and reduce with hydrogen at 350°C for 4 hours , the hydrogen pressure is 0.1 MPa.

[0051]After reduction, it was lowered to room temperature, and 122 ml of ammonium metatungstate aqueous solution containing 23.5 g / L tungsten was added under a hydrogen atmosphere, and then the solid-containing suspension was transferred as a whole to a 500 ml Parr stainless steel autoclave. The hydrogen pressure was charged to 4.0 MPa...

Embodiment 2

[0062] This example is used to illustrate the catalyst provided by the present invention and its preparation method.

[0063] According to the required metal salt content of the equal volume impregnation method, 30.6 milliliters of dichloro tetraammine platinum containing 11.8 g / liter of platinum and the impregnation solution of ammonium tetrachloropalladate containing palladium 11.8 g / liter were prepared. Decant the impregnation solution to 36 g γ-Al 2 o 3 The carrier was stirred evenly at 20°C, left to stand for 4 hours, dried at 120°C, calcined at 350°C for 4 hours, hydrogen reduced at 350°C for 4 hours, and the hydrogen pressure was 0.1 MPa.

[0064] After reduction, it was lowered to room temperature, and 122 ml of ammonium metatungstate aqueous solution containing 23.5 g / L tungsten was added under a hydrogen atmosphere, and then the solid-containing suspension was transferred as a whole to a 500 ml Parr stainless steel autoclave. The hydrogen pressure was charged to 4....

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Abstract

The invention discloses a supported bimetallic catalyst, which comprises a carrier and a hydrogenation active metal component supported on the carrier, wherein the hydrogenation active metal componentcontains a first metal component M1 selected from Pt and / or Pd, and a second metal component M2 selected from a Group VIB and / or VIIB, [(M2 / M1)XPS] / [(M2 / M1)XRF] is more than 5 and is less than 10, (M2 / M1)XPS is a weight ratio (calculated as the metal element) of the second metal component to the first metal component in the catalyst characterized by X-ray photoelectron spectroscopy, and (M2 / M1)XRF is a weight ratio (calculated as the metal element) of the second metal component to the first metal component in the catalyst characterized by X-ray fluorescence spectroscopy. Compared to the catalyst having the same metal content in the prior art, the catalyst of the present invention has significantly high catalytic activity on glycerol hydrogenolysis reactions and high selectivity.

Description

technical field [0001] The invention relates to a supported bimetallic catalyst, its preparation method and application, and a method for using the catalyst to catalyze glycerol hydrogenolysis reaction. Background technique [0002] 1,3-propanediol is an important raw material for the production of degradable polyester propylene terephthalate (PTT), etc., and its demand is constantly increasing; moreover, as an important chemical raw material, it can also be used in solvents, emulsifiers, medicines, In cosmetics and organic synthesis. At present, the industrial production of 1,3-propanediol mainly adopts ethylene oxide carbonylation method and acrolein hydration hydrogenation method, and the raw materials of these two processes are from petroleum. With the continuous depletion of petroleum resources, it is of great significance to find non-petroleum routes for the production of 1,3-propanediol. Glycerol is a stoichiometric by-product (about 10%) in the biodiesel production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652C07C29/60C07C31/20
CPCB01J23/6525B01J23/6527C07C29/60C07C31/205
Inventor 郑仁垟李明丰李会峰夏国富晋超吴玉
Owner CHINA PETROLEUM & CHEM CORP
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