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Method for preparing acraldehyde catalyst by glycerol dehydration

A dehydration catalyst and catalyst technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of catalyst activity decline, glycerin conversion rate decline, etc., and achieve simple reaction process and high stability , Catalyst activity shows good effect

Inactive Publication Date: 2017-09-01
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Alhanash A et al. (Appl.Catal.A-Gen.378(2010): 11-18) mentioned that using heteropolyacid system cesium phosphotungstate salt as active component, the selectivity of acrolein can reach 98%, but this The catalyst activity decreased rapidly, and the conversion rate of glycerol dropped to 40% after 6 h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using NiO / ZrP with a Ni content of 0.5% (wt) as the catalyst, a 10% mass fraction of glycerol aqueous solution as the raw material in a fixed-bed tubular reactor, nitrogen as the carrier gas, and a volumetric space velocity controlled at 80h -1 , the reaction temperature is 280°C, under this condition for 12 hours, the average conversion rate of glycerol is 77%, and the average selectivity of acrolein is 66%.

Embodiment 2

[0028] Using NiO / ZrP with a Ni content of 5% (wt) as the catalyst, a 50% mass fraction of glycerol aqueous solution as the raw material in a fixed-bed tubular reactor, nitrogen as the carrier gas, and a volumetric space velocity controlled at 40h -1 , the reaction temperature is 250°C, under this condition for 12 hours, the average conversion rate of glycerol is 84%, and the average selectivity of acrolein is 67%.

Embodiment 3

[0030] Fe with a Fe content of 10% (wt) 2 o 3 / ZrP is the catalyst, and the glycerin aqueous solution with 30% mass fraction is used as the raw material on the fixed-bed tubular reactor, nitrogen is used as the carrier gas, and the volume space velocity is controlled at 80h -1 , the reaction temperature is 300 ℃, under this condition for 6 h, the average conversion rate of glycerol is 89%, and the average selectivity of acrolein is 67%.

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PUM

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Abstract

The invention discloses a method for preparing an acraldehyde catalyst by glycerol dehydration. The method comprises the following steps: firstly, adopting zirconium phosphate as a carrier, selecting one or more of Cu(NO3)2, Fe(NO3)3, Co(NO3)2, (NH4)2Mo2O7, Ce(NO)3 and Ni(NO3)2 as active ingredients, and obtaining an MOx / ZrP catalyst by using an impregnation method; secondly, controlling the reaction temperature at 200 to 400DEG C under the condition of a fixed bed, selecting the MOx / ZrP as the catalyst and 10 to 100 percent of glycerine aqueous solution as a raw material and nitrogen as carrier gas and then carrying out a reaction of preparing acraldehyde by the glycerol dehydration. According to the method disclosed by the invention, the catalyst can be prepared simply and conveniently; better activity still can be maintained after being used for several times; meanwhile, the conversion rate of glycerol is between 80 percent to 100 percent and the selectivity of the acraldehyde is between 50 percent to 100 percent.

Description

technical field [0001] The invention relates to a method for preparing an acrolein catalyst by dehydrating glycerin, which belongs to the field of chemical industry. Background technique [0002] Since the beginning of the industrial revolution, the demand for energy has been increasing day by day, and the consumption of oil, natural gas and coal is gradually increasing. Energy plays an irreplaceable role in production and plays an important role in economic growth. But fossil energy is non-renewable energy. The rapid consumption of fossil energy will not only lead to energy depletion, but also cause environmental pollution, greenhouse effect and other problems. Facing these problems, it is imperative to develop clean and efficient renewable energy. [0003] Biodiesel is produced by using oil as raw material through esterification or transesterification process. The main component is long-chain fatty acid methyl ester. Because the raw material is renewable, and the combusti...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J27/19B01J27/18B01J37/02B01J37/08C07C45/00C07C47/22
CPCB01J27/1853B01J27/1804B01J27/1817B01J27/19B01J37/0201B01J37/088C07C45/00C07C47/22
Inventor 菅盘铭张伟邓永航袁金郑茂芬于楠
Owner YANGZHOU UNIV
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