Method for synthesizing 2-pentanone by usig ethanol

A technology of ethanol and pentanone, applied in the field of synthesis of 2-pentanone from ethanol, which can solve problems such as complex process, high production cost, and environmental pollution

Inactive Publication Date: 2005-08-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The traditional synthesis process of 2-pentanone is the oxidative dehydrogenation of 2-pentanol or the co-heating of ethyl butyroacetate and water. Not only the production cost is high, but also the synthesis process uses a large amount of organic solvents and inorganic substances, resulting in a large amount of The three wastes pollute the environment
In addition, this proc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] The synthesis of 2-pentanone from ethanol was carried out in a fixed-bed reactor (Φ9×450mm). Anhydrous ethanol is used as raw material, and the catalyst is K-Pd / ZrO 2 / MnO / ZnO, the particle size of the catalyst is 20-40 mesh, and the loading capacity is 2ml. The catalyst is reduced with hydrogen before use, the reduction temperature is 420°C, the reduction pressure is 2.0MPa, after reduction, the temperature is lowered to 370°C, nitrogen is used as the carrier gas, the pressure is increased to 2.0MPa, and the gas space velocity is 10000h -1 , ethanol is pumped in by a micro plunger, and the liquid space velocity is 0.5h -1 , tail gas was analyzed on-line with HP 4890 gas chromatograph (TCD detector, Porapak QS packed column), and the condensate was analyzed on VARIAN 3800 gas chromatograph (FID detector, HP-FFAP capillary column) with n-amyl alcohol as internal standard .

example 2

[0010] The reaction gas space velocity is 12000h -1 , other conditions are the same as example 1.

example 3

[0012] The reaction gas space velocity is 8000h -1 , other conditions are the same as example 1.

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Abstract

A process for synthesizing pentone from ethanol features the reaction between ethanol and catalyst K-Pd/ZrO2/MnO/ZnO in initial gas. Its advantages are high conversion rate (100%) and selectivity. Its separation method is distilling.

Description

technical field [0001] The invention relates to a method for synthesizing 2-pentanone with ethanol, in particular to a method for synthesizing 2-pentanone with ethanol through heterogeneous catalysis in one step. Background technique [0002] 2-Pentanone is an important industrial solvent, used for dewaxing of high-boiling petroleum fractions, and also used as an intermediate in the synthesis of medicines and pesticides, such as 2-Pentanone is an intermediate in the synthesis of the vasodilator drug Viagra (Virga) . The traditional synthesis process of 2-pentanone is the oxidative dehydrogenation of 2-pentanol or the co-heating of ethyl butyroacetate and water. Not only the production cost is high, but also the synthesis process uses a large amount of organic solvents and inorganic substances, resulting in a large amount of The three wastes pollute the environment. In addition, this process can also catalyze the synthesis of other higher ketones, while the traditional proc...

Claims

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Application Information

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IPC IPC(8): C07C45/41C07C49/04
Inventor 丁云杰何代平陈维苗罗洪原
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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