Catalyst for synthesizing isophorone

A technology of isophorone and catalyst, which is applied in the field of catalysts for synthesizing isophorone, can solve the problems of difficult catalyst preparation, high cost, and unsuitability for industrial production, and achieve good crystal shape, large alkaline sites, and large specific surface area Effect

Inactive Publication Date: 2014-04-02
张锦碧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reichle used LiAIMg(OH) 6 As a catalyst, the yield of acetone to isophorone can be increased to 40%, but the preparation of the catalyst is difficult and the cost is high, so it is not suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A catalyst for synthesizing isophorone, comprising the steps of:

[0031] (1) The nitrates of metal magnesium, aluminum, and zirconium were prepared into a mixed salt solution with a concentration of 1 mol / L;

[0032] (2) Add aluminum nitrate and zirconium nitrate to the magnesium nitrate solution dropwise under stirring conditions, stir for 1.5 h, age the resulting precipitate at 60 °C for 0.5 h, filter and wash until neutral, Dry at 60°C to obtain a magnesium aluminum zirconium hydrotalcite sample;

[0033] (3) The dried hydrotalcite samples were placed in a muffle furnace and calcined at 300 °C for 4 h to prepare the required catalyst, which was ground and sieved after cooling.

Embodiment 2

[0035] A catalyst for synthesizing isophorone, comprising the steps of:

[0036] (1) The nitrates of metal magnesium, aluminum, and zirconium were prepared into mixed salt solutions with concentrations of 1 mol / L, 1 mol / L, and 1.5 mol / L, respectively;

[0037] (2) Add aluminum nitrate and zirconium nitrate solutions dropwise to the magnesium nitrate solution simultaneously under stirring conditions, stir for 1 h, age the resulting precipitate at 50 °C for 1 h, filter and wash until neutral. Dry at 80°C to obtain a magnesium aluminum zirconium hydrotalcite sample;

[0038] (3) Put the dried hydrotalcite sample in a muffle furnace, and bake it at 400 °C for 3 hours to make the required catalyst, grind it after cooling, and sieve it.

Embodiment 3

[0040] A catalyst for synthesizing isophorone, comprising the steps of:

[0041] (1) The nitrates of metal magnesium, aluminum, and zirconium were prepared into mixed salt solutions, the concentrations were 1 mol / L, 1.5 mol / L, and 1.5 mol / L;

[0042] (2) Add aluminum nitrate and zirconium nitrate solutions dropwise to the magnesium nitrate solution simultaneously under stirring conditions, stir for 1.2 h, age the resulting precipitate at 55 °C for 0.8 h, suction filter and wash until neutral , and dried at 70°C to obtain a magnesium aluminum zirconium hydrotalcite sample;

[0043] (3) The dried hydrotalcite samples were placed in a muffle furnace and calcined at 350 °C for 3.5 h to prepare the required catalyst, which was ground and sieved after cooling.

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PUM

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Abstract

The invention relates to a method for preparing isophorone, and belongs to the technical field of chemical material preparation. The method comprises the steps of: compounding the nitrate of metal magnesium, metal aluminum and metal zirconium into a mixed salt solution, dripping an aluminium nitrate solution and a zirconium nitrate solution into a magnesium nitrate solution at the same time under the condition of stirring, stirring for 1 to 1.5h, aging the obtained deposit for 0.5 to 1h under 50 to 60 DEG C, pumping, filtering and washing the deposit to be neutral, drying the deposit under 60 to 80 DEG C to obtain magnesium-aluminum-zirconium hydrotalcite samples, putting the hydrotalcite samples obtained by drying in a muffle furnace, calcining the hydrotalcite samples for 3 to 4h under 300 to 400 DEG C to prepare the needed catalyst, and cooling, grinding and sieving the catalyst. The hydrotalcite catalyst which is prepared in the method not only has high purity, good crystal form and the characteristic of hydrotalcite-like compounds but also has a porous structure, a large specific surface area and an alkaline site which are required for catalyzing the reaction; the catalytic reaction with mild condition and no pollution can be repeatedly used, thereby greatly lowering production cost.

Description

technical field [0001] The invention relates to a catalyst for synthesizing isophorone, in particular to a catalyst synthesized from magnesium, aluminum and zirconium with high purity, mild reaction conditions and high efficiency, and belongs to the technical field of chemical material preparation. Background technique [0002] As one of the important derivatives of acetone, isophorone began to be produced on a large scale in foreign countries as early as the 1960s [0003] Production of isophorone. According to reports: In 1963, Dailuo Corporation of Japan cooperated with Union Carbide Corporation of the United States to build a factory in Japan with a production capacity of 2600 t / a. In recent years, with the rapid development of the chemical industry, especially the synthetic resin industry, the demand for isophorone continues to grow. In the United States and Japan, the production of isophorone can basically reach the balance between supply and demand, and most of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/10C07C49/603C07C45/74
Inventor 张锦碧
Owner 张锦碧
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