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Oxalate hydrogenation copper-gold dual-metal catalyst and preparation method thereof

A technology of bimetallic catalyst and oxalate, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of rising cost and price, affecting application, and large dosage, so as to reduce dosage and improve activity Little change, promote dispersion effect

Inactive Publication Date: 2014-07-02
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of gold added to this catalyst, the cost price will increase. On the other hand, the reaction product is mainly methyl glycolate, which has a narrow application, which affects its practical application.

Method used

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  • Oxalate hydrogenation copper-gold dual-metal catalyst and preparation method thereof
  • Oxalate hydrogenation copper-gold dual-metal catalyst and preparation method thereof
  • Oxalate hydrogenation copper-gold dual-metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Take the specific surface area prepared in the laboratory to be 783m 2 / g of SBA-15 carrier 2.0g.

[0026] 2) Completely dissolve 0.3g of PVP in 25mL of tetrahydrofuran (THF), pour the above-mentioned carrier into the solution, let it stand for 4 hours, filter, wash and dry to obtain the P-SBA-15 product, which is ready for use.

[0027] 3) Add 0.2g of ethylenediamine (ED) and 20ml of deionized water to the above P-SBA-15 product, reflux at 90°C for 12h, cool to room temperature, rinse with deionized water, and vacuum dry at 60°C to obtain functional group ED-P-SBA-15 solid powder A, spare.

[0028] 4) At room temperature, use a pipette to pipette 7.8 mL of 0.01 g / mL chloroauric acid aqueous solution, dilute it in 100 mL of deionized water, add functionalized ED-P-SBA-15 under stirring, and stir for 10 minutes while stirring Add 0.2M NaBH dropwise 4 20 mL of aqueous solution, the solution changed from yellow to deep purple after 10 minutes, vacuum filtered and was...

Embodiment 2

[0035] The preparation method of functionalized ED-P-SBA-15 is the same as that in Example 1. The preparation method of SBA-15 supported bimetallic Cu-Au catalyst is the same as that of Example 1, but the chloroauric acid solution of 0.01g / mL is 3.80mL, and other compositions are unchanged, and 6.0%Cu-0.9%Au / ED-P is obtained -SBA-15 catalyst, the Cu and Au loadings obtained by ICP-OES quantitative measurement are within the error range of the theoretical loadings; the specific surface area is 359m after nitrogen static adsorption test 2 / g, the pore volume is 0.68mL / g, and the average pore diameter is 6.1nm; the metal particle diameter can be calculated as 2.9nm from the electron microscope (TEM) photo of the catalyst. The performance evaluation and product analysis conditions of the catalyst for the hydrogenation of dimethyl oxalate to ethylene glycol are the same as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0037] The preparation method of functionalized ED-P-SBA-15 is the same as that in Example 1. The preparation method of the SBA-15 supported bimetallic Cu-Au catalyst is the same as in Example 1, but the chloroauric acid solution of 0.01g / mL is 5.70mL, and other compositions are unchanged, and 6%Cu-1.4%Au / ED- P-SBA-15 catalyst, the Cu and Au loadings obtained by ICP-OES quantitative measurement are within the error range of the theoretical loadings; the specific surface area is 373m after nitrogen static adsorption test 2 / g, the pore volume is 0.67mL / g, and the average pore diameter is 5.8nm; from the TEM photo of the catalyst, the metal particle size can be calculated as 3.2nm. The performance evaluation and product analysis conditions of the catalyst for the hydrogenation of dimethyl oxalate to ethylene glycol are the same as in Example 1, and the results are shown in Table 1.

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Abstract

The invention relates to a dual-metal catalyst, and in particular relates to an oxalate hydrogenation Cu-Au dual-metal catalyst and a preparation method of the catalyst. The invention provides the oxalate hydrogenation Cu-Au dual-metal catalyst which is environment-friendly, low in Cu load, excellent in catalytic performance and high in stability, and the preparation method of the catalyst. The oxalate hydrogenation Cu-Au dual-metal catalyst consists of Cu, Au and a carrier, and has the composition of x% of Cu-y% of Au / carrier, wherein x% is the mass percent of Cu in the catalyst, and y is the mass percent of Au in the catalyst. The preparation method comprises the steps of: firstly, using high polymer to modify the carrier; then, adding the components of Cu and Au to prepare a precursor of the catalyst; reducing the precursor of the catalyst in the hydrogen atmosphere; and finally obtaining the oxalate hydrogenation Cu-Au dual-metal catalyst.

Description

technical field [0001] The invention relates to a bimetallic catalyst, in particular to a copper-gold bimetallic catalyst for oxalate hydrogenation and a preparation method thereof. Background technique [0002] With the shortage of petroleum resources, it is of great strategic and economic significance to develop and utilize my country's relatively abundant coal and natural gas resources, and to develop carbon-one chemical industry. Among them, carbon-one chemical industry uses CO as raw material to prepare oxalate and its downstream products are carbon-one chemical industry important issues for development. Ethylene glycol (EG), also known as glycol and ethylene glycol, is an important organic chemical raw material, mainly used in the production of polyester, antifreeze, adhesives, paint solvents, cold-resistant lubricating oil, non-ionic surface Active agents, explosives and plasticizers, etc. Among them, polyester is the main consumption area of ​​ethylene glycol and is ...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C31/20C07C29/149
Inventor 袁友珠王亚楠郑建伟段新平林海强
Owner XIAMEN UNIV
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