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Formation method of Mg/Sn/W composite oxide catalyst

A composite oxide and molding method technology, which is applied in the molding field of Mg/Sn/W composite oxide catalyst, can solve the problem that the catalyst is difficult to recycle, and achieve the effect of easy separation and stable performance

Active Publication Date: 2018-01-19
河南能源化工集团研究总院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to fundamentally solve the problem that the current catalyst is difficult to recycle, the applicant intends to use a fixed-bed catalytic reaction distillation continuous process to catalyze the oxidation of cyclohexanone to synthesize ε-caprolactone, but the key technology of this process is the preparation and molding of the catalyst

Method used

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  • Formation method of Mg/Sn/W composite oxide catalyst
  • Formation method of Mg/Sn/W composite oxide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The steps of the molding method of the Mg / Sn / W composite oxide catalyst of this embodiment are as follows:

[0024] (1) Mix 30g Mg / Sn / W composite oxide catalyst powder, 0.9g activated carbon, 0.6g sesame powder, and 3g pseudo-boehmite first, and then add 0.9g nitric acid aqueous solution to obtain a wet mass ;

[0025] (2) Put the wet mass into the extruder and extrude it into a strip with a diameter of about 9mm and cut it to a length of about 2cm to obtain a shaped catalyst;

[0026] (3) Dry the formed catalyst in a drying oven at 80°C for 16 hours;

[0027] (4) Put the dried strip catalyst into a muffle furnace for high-temperature roasting. The roasting process adopts a programmed temperature rise at a heating rate of 1~3°C / min, and it is roasted at 550°C for 3 hours.

Embodiment 2

[0029] The steps of the molding method of the Mg / Sn / W composite oxide catalyst of this embodiment are as follows:

[0030] (1) Mix 30g of Mg / Sn / W composite oxide catalyst powder and 2.4g of activated carbon first; then add 3g of sesame powder, 12g of 25% silica sol solution, and add an aqueous solution containing 3.3g of nitric acid to obtain a wet mass;

[0031] (2) Put the wet mass into the extruder and extrude it into a strip with a diameter of about 9mm and cut it to a length of about 2cm to obtain a shaped catalyst;

[0032] (3) Dry the formed catalyst in a drying oven at 120°C for 12 hours;

[0033] (4) Put the dried strip catalyst into a muffle furnace for high-temperature roasting. The roasting process uses a programmed temperature rise at a rate of 1~3°C / min, and it is roasted at 550°C for 1 hour.

Embodiment 3

[0035] The steps of the molding method of the Mg / Sn / W composite oxide catalyst of this embodiment are as follows:

[0036] (1) Mix 30g Mg / Sn / W composite oxide catalyst powder and 1.5g activated carbon first; then add 3g sesame powder, 15g 30% aluminum sol solution, and add 1.5g nitric acid aqueous solution to obtain a wet mass;

[0037] (2) Put the wet mass into the extruder and extrude it into a strip with a diameter of about 9mm and cut it to a length of about 2cm to obtain a shaped catalyst;

[0038] (3) Dry the formed catalyst in a drying oven at 100°C for 24 hours;

[0039] (4) Put the dried strip catalyst into a muffle furnace for high-temperature roasting. The roasting process uses a programmed temperature rise at a rate of 1~3°C / min, and it is roasted at 500°C for 2h.

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Abstract

The invention discloses a formation method of an Mg / Sn / W composite oxide catalyst. The formation method comprises the following steps: evenly mixing an Mg / Sn / W composite oxide catalyst powder body with a binding agent to obtain a mixture; then adding an extrusion aid, a peptizing agent and a pore-forming agent into the mixture and then mixing again to obtain wet material agglomerates; putting thewet material agglomerates into a strip extruding machine and then extruding the wet material agglomerates into strip-shaped materials to obtain the formed catalyst; drying the formed catalyst in a drying box, and putting the dried catalyst into a muffle furnace and then roasting the dried catalyst at high temperature. According to the formation method of the catalyst, the mechanical strength of the catalyst can be improved in a formation process of the catalyst, active sites of the catalyst cannot be destroyed at the same time, and the reduction of the catalytic activity of the formed catalystcan be avoided.

Description

Technical field [0001] The invention belongs to the technical field of catalyst preparation, and specifically relates to a method for forming a Mg / Sn / W composite oxide catalyst. Background technique [0002] At present, the applicant has been committed to the research of heterogeneous catalytic oxidation of cyclohexanone to ε-caprolactone, and has formed a powdered Mg / Sn / W composite oxide catalyst with independent intellectual property rights. In order to fundamentally solve the problem that the current catalyst is difficult to recover, the applicant intends to adopt a fixed-bed catalytic reactive distillation continuous process to catalyze and oxidize cyclohexanone to synthesize ε-caprolactone, but the key technology of this process is the preparation and molding of the catalyst. Therefore, in this patent application, the molding process of the catalyst was studied, and a relatively inexpensive strip catalyst was prepared. [0003] The solid catalyst needs to have a specific shap...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J37/08C07D313/04
Inventor 张光旭闫捷李胜楠赵立红宋灿李丰苗杰梁旭尚如静蒋元力魏灵朝赵新岭管露峰孔少尉李秀峰周巧丽刘忻
Owner 河南能源化工集团研究总院有限公司
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