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Supported catalyst for pyridine synthesis by tetrahydrofurfuryl alcohol and preparation process thereof

A supported catalyst, tetrahydrofurfuryl alcohol technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of pyridine selectivity and low yield , to achieve the effects of convenient production, simple equipment, high selectivity and high yield

Inactive Publication Date: 2007-06-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But they all have the problem that the selectivity of pyridine and yield are not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Using molybdenum oxide, vanadium oxide and lanthanum oxide supported on γ-Al 2 o 3 on the carrier. Its preparation is: 6.2g (NH 4 ) 6 Mo 7 o 24 .4H 2 O, 6.42 g NH 4 VO 3 , 5.4g La(NO 3 ) 3 .6H 2 O was dissolved in 100mL water, and then the dried 50g γ-Al 2 o 3 The carrier is put into the solution and mixed, stirred to make the solution evenly absorbed into the micropores of the alumina carrier, and dried at room temperature; then the catalyst dried at room temperature is dried at 150°C for 4 hours, and burned at 800°C for 4 hours to make a supported catalyst , wherein the load of molybdenum oxide is 10% of the mass of the support, the load of vanadium oxide is 10% of the mass of the support, and the load of lanthanum oxide is 4% of the mass of the support.

Embodiment 2

[0014] Using molybdenum oxide, vanadium oxide, cerium oxide supported on γ-Al 2 o 3 on the carrier. Its preparation is: 12.4g (NH 4 ) 6 Mo 7 o 24 .4H 2 O, 6.42 g NH 4 VO 3 , 2.53g Ce(NO 3 ) 3 .6H 2 O was dissolved in 100mL water, and then the dried 50g γ-Al 2 o 3 The carrier is put into the solution and mixed, stirred to make the solution evenly absorbed into the micropores of the alumina carrier, and dried at room temperature; then the catalyst dried at room temperature is dried at 120°C for 4 hours, and burned at 500°C for 8 hours to make a supported catalyst , wherein the load of molybdenum oxide is 20% of the mass of the support, the load of vanadium oxide is 10% of the mass of the support, and the load of cerium oxide is 2% of the mass of the support.

Embodiment 3

[0016] Using molybdenum oxide, vanadium oxide, cadmium oxide loaded on γ-Al 2 o 3 on the carrier. Its preparation is: 6.2g (NH 4 ) 6 Mo 7 o 24 .4H 2 O, 12.84 g NH 4 VO 3 , 4.8g Cd(NO 3 ) 2 .4H 2 O was dissolved in 100mL water, and then the dried 50g γ-Al 2 o 3 The carrier is put into the solution and mixed, stirred to make the solution evenly absorbed into the micropores of the alumina carrier, and dried at room temperature; then the catalyst dried at room temperature is dried at 150°C for 4 hours, and burned at 800°C for 4 hours to make a supported catalyst , wherein the load of molybdenum oxide is 10% of the mass of the support, the load of vanadium oxide is 20% of the mass of the support, and the load of cadmium oxide is 4% of the mass of the support.

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PUM

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Abstract

The invention discloses a supported catalyst for synthesizing pyridine with tetrahydrofurfuryl alcohol and discloses the method for preparation, belonging to the catalyst technique for synthesizing pyridine. Said carrier of the catalyst is gamma- A1203, one of supporter components is MoO3, the mass of which is 5- 30% to that of carrier, another supporter component is V205, the mass of which is 5- 30% to that of carrier, and the third is La, Ce or Cd oxide, the mass of which is 0.5- 15% to that of carrier. The technique contains the following steps: Dissolving ammonium molybdate, ammonium metavanadate and a nitrate containing La, Ce or Cd into water to prepare an ammonium molybdate solution and a nitrate solution, mixing the dried gamma- A1203, mixing to make sure that the solution is uniformly absorbed into the micropore of the carrier aluminum oxide, drying in room temperature; redrying the room- temperature dried catalyst and igniting to prepare the supported catalyst that is used to synthesize pyridine with tetrahydrofurfuryl alcohol. The device needed is simple, the production is convenient, and the selectivity and yield of product pyridine is high.

Description

technical field [0001] The invention relates to a supported catalyst for synthesizing pyridine from tetrahydrofurfuryl alcohol and a preparation method thereof, belonging to the catalyst technology for synthesizing pyridine. Background technique [0002] Pyridine is an important organic solvent and fine chemical raw material, widely used in the fields of synthetic rubber, dyes, medicine and pesticides. [0003] Pyridine can be obtained from the coal tar industry or a by-product of coke production, but the yield is low, and the preferred method to obtain pyridine is to carry out catalytic synthesis. Catalytic synthesis is generally via the catalytic gas phase reaction of ammonia with aldehydes or ketones. However, these catalytic synthesis methods have historically suffered from low yields and poor selectivities, as well as short operating cycles and catalyst lifetimes. [0004] There is also a method for synthesizing pyridine through tetrahydrofurfuryl alcohol and ammonia,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28C07D213/14
Inventor 冯亚青周丹
Owner TIANJIN UNIV
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