Efficient furan preparation catalyst by furfural decarbonylation

A furfural decarburization catalyst, catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, organic chemistry, etc., can solve unsatisfactory space-time yields, expensive catalyst raw materials, etc. problems, and achieve the effects of long service life, high yield and simple preparation method

Inactive Publication Date: 2009-05-06
刘金廷 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

US3257417 uses active palladium catalyst to be loaded on potassium acetate to carry out liquid-phase decarbonylation, when activity reduces 10%, every gram of palladium produces 18g furan, Russian patent 342857, methyl furfural decarbonylation uses Group VIII metal catalyst, mainly palladium, The activity of rhodium was enhanced with alkali metals, and after 100 hours, 20 kg of methylfuran was produced per gra

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh the pretreated 3-5mm γ-Al 2 o 3 20g (dried in an oven at 120°C for 24h) was placed in a beaker. Weigh PdCl 2 Dissolve 0.09997g in 20ml of hydrochloric acid solution with pH=2 (in order to accelerate and completely dissolve, it can be dissolved in a water bath at 60°C) and the above-weighed γ-Al 2 o 3 Pour into PdCl 2 The solution was stirred with a glass rod for 0.5h, then immersed in a water bath at 40°C for 2h, and aged at room temperature for 2h. The above-mentioned aged catalyst was dried in an oven at 120° C. for 24 hours, then taken out and cooled to room temperature. The above-mentioned catalyst cooled to room temperature was calcined in a muffle furnace at 600° C. for 4 h. After the calcined catalyst is cooled to room temperature, adjust the pH value with 5% potassium carbonate solution to make the pH value greater than 9, (about 20ml), soak for 0.5h, filter with suction, and dry in an oven for 12h (120°C). Then take 20ml of nickel nitrate solution...

Embodiment 2

[0020] Similar to embodiment 1, get PdCl 2 0.1661 g is impregnated with the solution obtained by dissolving 20 ml of hydrochloric acid solution with pH=2 (in order to accelerate and completely dissolve, it can be dissolved in a water bath at 60°C). The preparation method and the activity investigation of the catalyst are all the same as in Example 1. The measurement results are shown in Table 1.

Embodiment 3

[0022]Similar to Example 1, just change the carrier into gamma-Al with a diameter of 2-3mm 2 o 3 The other catalyst preparation methods of 20g pellets and the investigation of the activity of the catalyst are all the same as in Example 1. The measurement results are shown in Table 1.

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Abstract

The invention provides a preparation method of a high-efficiency furfural decarbonylation catalyst for preparing furan, which comprises the steps as follows: active Al2O3 with the grain diameter of 1 to 6 mm is used as a carrier, Pd is used as a main active component with the content of 0.25 to 0.5 percent, and Ni and K with the content of 0.25 to 0.5 percent are used as catalytic addition agents. Traditional steeping methods are adopted for preparing the catalyst, and the prepared catalyst can be applied into gas furfural decarbonylation reaction. The results show that the catalyst prepared by the preparation method has better activity, achieves the furfural transformation rate of over 98 percent, and raises the selectivity to over 90 percent from an original level of about 70 percent.

Description

[0001] The invention relates to a preparation method of a furfural gas phase decarbonylation catalyst. Background technique [0002] For furfural decarburization catalysts, precious metals Pd, Pt, and Ru are commonly used, and their preparation process is often completed by loading them on a carrier. There is a report on liquid phase decarbonylation in US3007941, which provides the performance of Pd catalyst, which is more active than cesium, platinum, ruthenium and nickel. In the active cycle of catalyst, the furan output per gram of catalyst is defined as productivity, The calculated yield was 2100 g of furan per gram of catalyst. US3257417 uses active palladium catalyst to be loaded on potassium acetate to carry out liquid-phase decarbonylation, when activity reduces 10%, every gram of palladium produces 18g furan, Russian patent 342857, methyl furfural decarbonylation uses Group VIII metal catalyst, mainly palladium, The activity of rhodium was enhanced with alkali metals...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07D307/36
Inventor 刘金廷郭新亮王香婷李平
Owner 刘金廷
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