Metal-phase carrier-loaded type catalyst, and preparation method and application thereof

A technology of carrier loading and metal phase, applied in the field of catalysis, can solve the problems of difficult preparation, poor thermal conductivity, poor stability, etc., and achieve the effects of simple preparation method, good thermal conductivity and stable structure

Active Publication Date: 2016-02-03
ECO ENVIRONMENTAL ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ru-based homogeneous catalysts and ruthenium catalysts are expensive and difficult to prepare, and Cr in copper-chromium catalysts is highly toxic, while CuO / SiO 2 Catalysts, Cu(Au) / HMS catalysts, and other similar catalysts are relatively less stable and easily deactivated due to poor thermal conductivity (hydrogenation of oxalic acid diesters to ethylene glycol is a strongly exothermic process)

Method used

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  • Metal-phase carrier-loaded type catalyst, and preparation method and application thereof
  • Metal-phase carrier-loaded type catalyst, and preparation method and application thereof
  • Metal-phase carrier-loaded type catalyst, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This example provides the preparation of a metal copper fiber carrier-supported palladium catalyst.

[0040]Weigh 2 grams of red copper fibers with a diameter of 30 microns and a length of 2-5 mm and place them in a 50 ml beaker, pipette 1 ml of palladium-containing 10 g / L palladium nitrate aqueous solution and drop them into the beaker to completely infiltrate the red copper metal fibers. After the galvanic replacement reaction between the surface of the red copper fiber and palladium nitrate occurred for 2 hours, it was dried and roasted in the air at 300°C for 2 hours to obtain a catalyst with a palladium weight content of 0.5%, expressed as Pd-0.5 / 30 -ZT-fiber-300.

[0041] Under the condition that other conditions remain unchanged, the diameter of copper metal fiber in this embodiment can be 8 microns, 80 microns and 120 microns, and the obtained catalysts are represented as Pd-0.5 / 8-ZT-fiber-300, Pd-0.5 / 80- ZT-fiber-300, Pd-0.5 / 120-ZT-fiber-300.

[0042] Under t...

Embodiment 2

[0044] This example provides the preparation of palladium catalysts supported by metal red copper fibers with different Pd precursors.

[0045] Weigh 2 grams of copper fiber with a diameter of 30 microns and a length of 2-5 mm and place it in a 50 ml beaker, pipette 1 ml of palladium-containing 10 g / L palladium acetate aqueous solution and drop it into the beaker to completely infiltrate the copper metal fiber. After the galvanic replacement reaction between the surface of the red copper fiber and palladium acetate occurred for 3 hours, it was dried and roasted in the air at 300°C for 2 hours to obtain a catalyst with a palladium weight content of 0.5%, expressed as Pd(ac)- 0.5 / 30-ZT-fiber-300.

[0046] The determination of element content by plasma inductively coupled atomic emission spectrometry shows that in the Pd(ac)-0.5 / 30-ZT-fiber-300 catalyst prepared in this example, the exact weight content of palladium is 0.48%, and the rest is copper. The elemental analysis result...

Embodiment 3

[0051] This example provides the preparation of different metal fiber carrier-supported palladium catalysts.

[0052] Weigh 2 grams of nickel fibers with a diameter of 8 microns and a length of 5 to 10 mm and place them in a 50-ml beaker, pipette 1 ml of palladium-containing 40 g / L palladium nitrate aqueous solution and drop them into the beaker to completely infiltrate the nickel metal fibers. After galvanic displacement reaction between the nickel fiber surface and palladium nitrate for 0.5 hours, dry and bake in the air at 500°C for 2 hours to obtain a catalyst with a palladium weight content of 2%, expressed as Pd-2 / 8 -Ni-fiber-500.

[0053] Under the condition that other conditions remain unchanged, the metal fibers used in this embodiment can be 90 micron brass or 30 micron aluminum fibers, and the catalysts obtained are respectively expressed as Pd-2 / 90-HT-fiber-500 and Pd-2 / 30-Al-fiber-500.

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Abstract

The invention discloses a metal-phase carrier-loaded type catalyst, and a preparation method and application thereof. The metal-phase carrier-loaded type catalyst is composed of a metal-phase carrier, and palladium and gold or palladium-gold which are loaded on the carrier, wherein the palladium and the gold or the palladium-gold in the metal-phase carrier-loaded type catalyst has the following contents by weight percentage: the content of the palladium by weight percentage is 0.1 to 2.0%; (2) the content of the gold by weight percentage is 0.1 to 3.0%; or (3) the content of the palladium-gold by weight percentage is 0.1 to 5.0%. The metal-phase carrier-loaded type catalyst can be used as a catalyst in the reaction of hydrogenation synthesis of ethylene glycol or/and glycolate from dimethyl oxalate.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a metal-phase carrier-supported catalyst and its preparation method and application. The catalyst can be used as a catalyst in the reaction of hydrogenating oxalic acid diester to synthesize ethylene glycol. Background technique [0002] Ethylene glycol (EG) is an important basic chemical raw material, which is widely used in the production of polyester fiber and antifreeze. The traditional technology is to produce EG by hydrating petroleum ethylene with ethylene oxide. Due to the depletion of oil resources, it is imperative to open up new technological routes. The two-step technology of producing oxalic acid diester by gas-phase reaction after coal-to-synthesis gas, and then hydrogenating oxalic acid diester to ethylene glycol is another major progress in coal chemical industry in recent years. For areas with relatively poor oil and natural gas resources but rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/44B01J35/06B01J35/10B01J35/02C07C31/20C07C29/149C07C69/675C07C67/31
CPCY02P20/52
Inventor 路勇张立韩璐蓬刘晔徐彬周晓莹萧锦诚
Owner ECO ENVIRONMENTAL ENERGY RES INST
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