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Zirconium phosphate catalyst and its application in preparation of acrolein through glycerin dehydration

A catalyst, acrolein technology, applied in the preparation of phosphorus compounds, carbon-based compounds, preparation of organic compounds, etc., can solve the problems of low value of crude glycerin, affecting the industrial economy of biodiesel, etc., and achieve good catalytic stability and activity. and highly selective effects

Inactive Publication Date: 2015-02-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, crude glycerin is of little value
Excess glycerol not only poses serious disposal problems but also affects the economics of the biodiesel industry

Method used

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  • Zirconium phosphate catalyst and its application in preparation of acrolein through glycerin dehydration
  • Zirconium phosphate catalyst and its application in preparation of acrolein through glycerin dehydration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) aqueous solution (1.0mol / L, 64ml) was added dropwise to zirconium oxychloride (ZrOCl 2 ·8H 2 O) in an aqueous solution (1.0 mol / L, 32 ml), the resulting mixture was stirred overnight at room temperature, then suction filtered, washed with water until the pH of the filtrate reached 6, and tested for the absence of Cl with silver nitrate solution. – until, then dry the white precipitate at 100°C for 12 h, and dry the obtained powder at 200 o C was calcined for 4 hours to obtain the catalyst. The catalyst was pressed into 20-40 meshes for activity testing. The elemental analysis results showed that the molar ratio of phosphorus to zirconium in the material was 1.54.

[0017] Take the above 0.5g catalyst (20-40 mesh) and put it in the middle of the reactor, and fix the two ends of the bed with quartz wool and quartz sand, and play the role of preheating and vaporizing the raw materials. Before the reaction, the catalyst...

Embodiment 2

[0019] Ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) aqueous solution (1.0mol / L, 64ml) was added dropwise to zirconium oxychloride (ZrOCl 2 ·8H 2 O) in an aqueous solution (1.0 mol / L, 32 ml), the resulting mixture was stirred overnight at room temperature, then suction filtered, washed with water until the pH of the filtrate reached 6, and tested for the absence of Cl with silver nitrate solution. – Then, the white precipitate was dried at 100°C for 12 h, and the dried powder was dried at 400 o C was calcined for 4 hours to obtain the catalyst, and the elemental analysis results showed that the molar ratio of phosphorus to zirconium in the material was 1.54. The catalyst was pelletized into 20-40 mesh for activity testing.

[0020] Take the above 0.5g catalyst (20-40 mesh) and put it in the middle of the reactor, and fix the two ends of the bed with quartz wool and quartz sand, and play the role of preheating and vaporizing the raw materials. Before the reaction, the ca...

Embodiment 3

[0022] Ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) aqueous solution (1.0mol / L, 64ml) was added dropwise to zirconium oxychloride (ZrOCl 2 ·8H 2 O) in an aqueous solution (1.0 mol / L, 32 ml), the resulting mixture was stirred overnight at room temperature, then suction filtered, washed with water until the pH of the filtrate reached 6, and tested for the absence of Cl with silver nitrate solution. – until, then dry the white precipitate at 100°C for 12 h, and dry the obtained powder at 500 o C was calcined for 4 hours to obtain the catalyst, and the elemental analysis results showed that the molar ratio of phosphorus to zirconium in the material was 1.54. The catalyst was pelletized into 20-40 mesh for activity testing.

[0023] Take the above 0.5g catalyst (20-40 mesh) and put it in the middle of the reactor, and fix the two ends of the bed with quartz wool and quartz sand, and play the role of preheating and vaporizing the raw materials. Before the reaction, the catal...

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Abstract

The invention relates to a catalyst for preparing acrolein through glycerin dehydration, and a preparation method thereof. The catalyst is prepared through co-precipitating an ammonium biphosphate solution (NH4H2PO4) and a ZrOCl2 solution, the activity of the catalyst is closely related to the acid center on the surface, and the roasting temperature can change the strength and number of the acid center on the surface of the catalyst. The activity of the catalyst increases with the roasting temperature and is maximum when the roasting temperature reaches 400DEG C, and higher roasting temperature causes the decrease of the yield of acrolein on the catalyst. The zirconium phosphate catalyst for the preparation of acrolein through glycerin dehydration has the advantages of high activity and good reaction stability, and is a very promising glycerin dehydration catalyst.

Description

technical field [0001] The invention relates to a zirconium phosphate catalyst for preparing acrolein by dehydrating glycerin. Background technique [0002] With the depletion of non-renewable fossil energy such as coal, oil and natural gas on the earth, the price of mineral resources is rising, and environmental pollution and other problems are becoming more and more serious, forcing governments of all countries to actively seek clean renewable energy and green chemical production technology. Among all the alternative fuels that have attracted attention, biodiesel has attracted much attention due to its environmental protection, safety and renewability, and it is considered as a new energy source that can replace petrochemical diesel. Various studies conducted to date have shown that the use of biodiesel can reduce emissions of typical pollutants such as particulate matter (PMs), carbon monoxide, nitrogen oxides, sulfur compounds, polycyclic aromatic hydrocarbons (PAHs) and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18C07C47/22C07C45/52C01B25/37
Inventor 侯震山干彗媚郭立修玉贺陈昂骏刘雪瑞
Owner EAST CHINA UNIV OF SCI & TECH
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