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Catalyst synthesizing dimethyl oxalate by CO gas phase coupling and preparing method of catalyst

A technology of dimethyl oxalate and catalyst, which is applied to the catalyst for synthesizing dimethyl oxalate by CO gas phase coupling and the field of preparation thereof, and can solve the problems such as the utilization rate of methyl nitrite not being considered.

Active Publication Date: 2016-03-09
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD +1
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  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Chinese patent CN102219680A improves the utilization rate of nitrogen oxides by using a rotating bed high-gravity reactor. Specifically, after the coupling reaction, the gas-phase effluent containing NO enters the rotating-bed h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] carrier modification

[0024] Zirconium tetrachloride (ZrCl 4 ) 0.1025g, add 1mL1:1 (volume ratio) hydrochloric acid solution and 9mL deionized water to make an additive solution, and impregnate α-Al into the solution 2 o 3 20g, after natural drying, roasting at 800°C for 12h, that is, 0.2%ZrO 2 / α-Al 2 o 3 .

[0025] Catalyst preparation

[0026] After adding 0.0851 g of palladium acetate into 10 mL of acetone, ultrasonic treatment was performed for 1 h, followed by light irradiation for 72 h to prepare a palladium acetate / acetone impregnation solution. Then, the solution was impregnated with Zr-modified α-Al 2 o 3 20g, acetone was distilled off after soaking for 6h. Finally, put it into a blast drying oven and dry it at 120°C for 4h, and then reduce it at 300°C for 2h under a hydrogen atmosphere to obtain 0.2%Pd / α-Al 2 o 3 -ZrO 2 catalyst.

[0027] Response Performance Evaluation

[0028] In a fixed-bed reactor with an inner diameter of 12mm and a ...

Embodiment 2

[0030] ZrCl 4 Add 1mL 1:1 (volume ratio) hydrochloric acid solution and 9mL deionized water to 0.1025g to make an auxiliary solution, impregnate 20g of alumina in the solution, dry it naturally, and roast at 1100°C for 8h to obtain 0.2% ZrO 2 / α-Al 2 o 3 .

[0031] Catalyst preparation and reaction performance evaluation are the same as in Example 1.

Embodiment 3

[0033] ZrCl 4 Add 1mL1:1 (volume ratio) hydrochloric acid solution and 9mL deionized water to 0.1025g to make an auxiliary agent solution, impregnate 20g of alumina in the solution, dry it naturally, and roast at 1300°C for 4h to obtain 0.2% ZrO 2 / α-Al 2 o 3 .

[0034] Catalyst preparation and reaction performance evaluation are the same as in Example 1.

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PUM

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Abstract

The invention relates to a catalyst synthesizing dimethyl oxalate by CO gas phase coupling and a preparing method of the catalyst. Aluminum oxide is modified by an additive to prepare modified alpha-Al2O3, and then dipping is performed in a palladium acetate/acetone solution subjected to ultrasonic and light illumination treatment in sequence to prepare the catalyst using the modified alpha-Al2O3 as a carrier and noble metal Pd as an active component. The preparing method has the advantages that the alpha-Al2O3 carrier is modified to prepare the Pd/alpha-Al2O3 catalyst, a Pd load is low, a use ratio of methyl nitrite is improved, dimethyl oxalate is efficiently synthesized and the like.

Description

technical field [0001] The invention belongs to the field of chemical industry catalysis, and in particular relates to a catalyst for synthesizing dimethyl oxalate through CO gas phase coupling and a preparation method thereof. Background technique [0002] As an important organic chemical raw material, oxalic acid diester can be used in the fine chemical industry to produce various dyes, medicines, important solvents, extractants and other intermediates, and is widely used in the synthesis of various chemical products. A particularly important application is the hydrogenation of oxalic acid diesters to produce ethylene glycol. Ethylene glycol is an important organic chemical raw material. It is mainly used to react with terephthalic acid to produce ethylene terephthalate (PET). [0003] Compared with the traditional production method of oxalic acid diester and the liquid phase method of carbon monoxide coupling to synthesize oxalic acid diester, the process of carbon mono...

Claims

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Application Information

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IPC IPC(8): B01J23/44C07C69/36C07C67/36
Inventor 潘振东田志坚夏锐夏伦超曲炜王从新周佳王伟王炳春韩建强
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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