Catalyst in use for synthesizing 2-pentanone from ethanol

A catalyst and ethanol technology, applied in the field of preparation of the above catalyst, can solve the problems of environmental pollution, three wastes, and high cost of raw materials

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

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Problems solved by technology

The production of 2-pentanone by these processes not only has high cost of raw materials, but also uses a large amount of organic solvents and inorganic substances in the synthesis process, which produces a large amount of three wastes and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Example 1, K-Pd / ZrO 2 / MnO / ZnO (Zr / Mn / Zn=2 / 2 / 1 molar ratio) catalyst

[0017] According to the molar ratio Zr / Mn / Zn=2 / 2 / 1, a mixed aqueous solution of zirconium nitrate, manganese nitrate and zinc nitrate was prepared, potassium hydroxide was used as a precipitating agent, and co-precipitation was carried out at 75°C and pH 10.0 with constant stirring to obtain Colloidal precipitate containing zirconium, manganese and zinc. After aging at the precipitation temperature for 5 hours, wash and filter until the filtrate is neutral, then dry at 130°C and roast at 450°C to obtain mixed oxides of zirconia, manganese oxide and zinc oxide. Potassium was added using the traditional impregnation method with a loading of 1 wt% K and the precursor was K 2 CO 3 . After drying in the shade and drying, it is roasted at a temperature of 400°C. The addition of Pd also adopts the conventional impregnation method, the loading amount is 0.5wt%Pd, and the precursor is Pd(NO 3 ) 2 . Af...

example 2

[0018] Example 2, K-Pd / ZrO 2 / MnO / ZnO (Zr / Mn / Zn=1 / 1 / 1 molar ratio) catalyst

[0019] Prepare zirconium nitrate, manganese nitrate, zinc nitrate mixed aqueous solution according to molar ratio Zr / Mn / Zn=1 / 1 / 1, other preparation steps are the same as Example 1.

example 3

[0020] Example 3, K-Pd / ZrO 2 / MnO / ZnO (Zr / Mn / Zn=3 / 3 / 1 molar ratio) catalyst

[0021] The mixed aqueous solution of zirconium nitrate, manganese nitrate and zinc nitrate was prepared according to the molar ratio Zr / Mn / Zn=3 / 3 / 1, and the other preparation steps were the same as in Example 1.

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Abstract

A catalyst used for synthesizing 2-pentone from ethanol is prepared from zirconium oxide, manganese oxide, zinc oxide, less noble metal (Pt, Pd, Rh, etc) and less assistant (Li, Na, K, Mg, etc) through mixing three oxides, dipping assistant, calcining, dipping noble metal, and calcining. It has high activity, selectivity and stability.

Description

technical field [0001] The invention provides a catalyst for the heterogeneous one-step synthesis of 2-pentanone from ethanol. [0002] The present invention also provides a preparation method of the above catalyst. Background technique [0003] 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 method of 2-pentanone is obtained by oxidative dehydrogenation of 2-pentanol, and it can also be prepared by co-heating ethyl butyroacetate and water. The production of 2-pentanone by these processes not only has high cost of raw materials, but also uses a large amount of organic solvents and inorganic substances in the synthesis process, which produces a large amount of three wastes and pollutes the environment. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/60B01J23/656C07C45/00C07C49/04
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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