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A kind of monolithic palladium catalyst and its preparation method and application

A palladium catalyst, packaged technology, applied in the direction of carbon monoxide or formate reaction preparation, catalyst carrier, chemical instrument and method, etc., can solve the problems of poor thermal conductivity of alumina, expensive catalyst cost, overheating reaction of reactor, etc. , to achieve the effect of stable structure, easy molding and high permeability

Active Publication Date: 2016-01-20
易高卓新节能技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CO gas-phase coupling is a strong exothermic process, and the thermal conductivity of alumina is poor. Therefore, in industrial reactors, it is easy to form "hot spots" in the reactor to sinter and deactivate the catalyst, and even cause the reactor to run out of temperature and cause the reaction to run out of control, which may lead to cause serious safety accidents
It should be pointed out that the noble metal Pd loading of the current industrial catalyst is as high as 2% (weight), and the catalyst cost is expensive.

Method used

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  • A kind of monolithic palladium catalyst and its preparation method and application
  • A kind of monolithic palladium catalyst and its preparation method and application
  • A kind of monolithic palladium catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Weigh 5 grams of nickel foam, add 0.3 grams of aluminum powder with a particle size of 1 to 3 microns (the mass ratio of aluminum powder / metal carrier is 6 / 100) to impregnate in equal volume, then dry, and then Carry out solid-solid alloying reaction (about 2 hours) at 600°C in a high-purity protective atmosphere to obtain a metal phase skeleton after alloying treatment;

[0047] 2. The alloyed metal phase skeleton obtained in step 1 is subjected to an aluminum extraction reaction at room temperature to 60° C. with an aqueous solution of sodium hydroxide with a concentration of 15 wt % for 1 hour, rinsed with distilled water, dried, and placed in the Calcined in the air at 450°C for 2 hours to obtain a porous metal phase support for anchoring oxides, expressed as NiO-Ni-foam;

[0048] 3. Weigh 5 grams of the metal phase carrier prepared in step 2, and use Pd(NO 3 ) 2 The aqueous solution is impregnated with an equal volume at room temperature, and after drying, it ...

Embodiment 2

[0056] 1, with the step 1 of embodiment 1;

[0057] 2. The alloyed metal phase skeleton obtained in step 1 is subjected to an aluminum extraction reaction at room temperature to 60° C. with an aqueous solution of sodium hydroxide with a concentration of 15 wt % for 1 hour, rinsed with distilled water, dried, and placed in the Calcined in the air at 550°C for 2 hours to obtain a porous metal phase support for anchoring oxides, expressed as NiO-Ni-foam;

[0058] 3. Weigh 5 grams of the metal phase carrier prepared in step 2, and use palladium nitrate containing 0.025 gram of Pd, 0.125 gram of CeO 2 of cerium nitrate and 0.125 g of Al 2 o 3 The mixed aqueous solution of aluminum nitrate is impregnated with an equal volume at room temperature, and after drying, it is baked in the air at 500°C for 2 hours to obtain a palladium-ceria-alumina monolithic structure supported on a nickel foam carrier anchored by NiO. palladium catalyst.

[0059] It is determined by plasma inductivel...

Embodiment 3

[0064] a. Weigh 5 grams of sintered aluminum fiber (fiber diameter: 50 microns) sheet, carry out aluminum extraction reaction with 1% sodium hydroxide aqueous solution for 1 hour, rinse with distilled water, dry, and roast in air at 300°C After 2 hours, the metal phase support of the porous anchored oxide was obtained, expressed as Al 2 o 3 -Al50-SMF;

[0065] b, take by weighing 5 grams of the metal phase support that step a makes, use the Pd(Ac) that contains 0.025 gram of Pd 2 Aqueous solution, impregnated with equal volume at room temperature, after drying, baked in air at 400°C for 2 hours to obtain anchored Al 2 o 3 A monolithic palladium catalyst supported by palladium on a sintered aluminum fiber support.

[0066] It is known through plasma inductively coupled atomic emission spectrometry that: in the catalyst prepared in this embodiment, the mass content of Pd is 0.46%; through temperature-programmed reduction analysis and measurement, in the catalyst prepared in ...

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Abstract

The invention discloses an integrally-used palladium catalyst, a preparation method and an application. The integrally-used palladium catalyst is a catalyst loading a palladium metal or a palladium metal and auxiliary agent metal oxide on a metal phase carrier of a porous anchors oxide. The preparation method of the catalyst comprises the following steps: performing porous treatment on a metal phase frame or the metal phase frame through alloyage treatment by acid or alkali for roasting, preparing the metal phase carrier of the porous anchors oxide, then performing isopyknic dipping treatment and roasting the prepared metal phase carrier by a palladium-containing ionic solution, or a palladium ion-containing solution and a M1 ion-containing solution, and a mixture of palladium ion-containing solution and M1 ion-containing solution, and then prepared the integrally-used palladium catalyst. The integrally-used palladium catalyst can be used for reacting carbon monoxide and nitrous acid ester for synthesis of oxalic acid diester, reacting of nitrous acid ester through catalytic decomposition for synthesis of organic acid ester and reacting of carbon monoxide and nitrous acid ester for synthesis of carbonic acid diester.

Description

technical field [0001] The invention relates to a monolithic palladium catalyst and its preparation method and application, in particular to a monolithic palladium loaded on a metal phase carrier of a porous anchored oxide or loaded with palladium and an auxiliary metal oxide Formula palladium catalyst and its preparation method and its application in the reaction of carbon monoxide and nitrite to synthesize oxalic acid diester, the reaction of catalyzed decomposition of nitrite to synthesize organic acid ester and the reaction of carbon monoxide and nitrite to synthesize carbonic acid diester, belonging to the field of catalytic technology . Background technique [0002] Ethylene glycol (EG) is an important chemical raw material, mainly used in the production of polyester products such as polyester fibers, polyester resins, and polyester films, and non-polyester products such as antifreeze, refrigerants, and adhesives. In 2012 The output of ethylene glycol in my country is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J23/44B01J35/10B01J32/00C07C69/96C07C68/00C07C69/06C07C69/36C07C67/36
Inventor 路勇王纯正李亚坤韩璐蓬张立刘晔
Owner 易高卓新节能技术(上海)有限公司
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