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Catalyst for preparing isophorone using condensation of acetone and preparation method thereof

A technology for isophorone and catalyst, which is applied in the field of isophorone condensation catalyst for acetone and its preparation, can solve the problems of low yield and the like, and achieve the effects of easy separation, reduced requirements and fewer types

Inactive Publication Date: 2009-06-24
LANZHOU 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

At present, there is no official manufacturer in my country, and only a few reagent manufacturers have small-scale experimental production, and the output is very small

Method used

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  • Catalyst for preparing isophorone using condensation of acetone and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare salt solution with nitrate in molar ratio Mg:Ca:Al=8:1:3, and prepare stoichiometric NaOH and 25% Na 2 CO 3 composed alkaline solution. Add the two solutions side-by-side to a small amount of distilled water at 80°C under mechanical stirring, and adjust the rate of addition to maintain the pH value between 8-10. After the dropwise addition, keep stirring mechanically at 80°C for 24h, filter after cooling, and wash with a large amount of water. The filter cake was dried in an oven at 120°C for 24 hours, and then calcined at 500°C for 8 hours to obtain a catalyst sample.

Embodiment 2

[0019] The preparation process is the same as in Example 1, and the molar ratio of nitrate is changed to Mg:Ca:Al=19:1:10.

Embodiment 3

[0021] The preparation process is the same as in Example 1, doped with barium ions, and the molar ratio of nitrate is Mg:Ba:Al=8:1:3.

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Abstract

The invention discloses a catalyst for preparing isophorone by condensing acetone and a preparation method thereof. The catalyst is composite oxide Mg(M)AlO, a molecular general formula of the catalyst is represented by Mg(Mx)AlyOz, wherein M represents lithium, barium or calcium, x is more than or equal to 0.05 and is less than or equal to 0.3, y is more than or equal to 0.25 and is less than or equal to 0.75, z is equal to 1+nx / 2+3y / 2, and n is a chemical valence of the doped metal element M. The catalyst is used for a reaction that the acetone is condensed to prepare the isophorone, the highest conversion rate under normal pressure reaches 38.2 percent, the selectivity of the isophorone is 77.8 percent, and the total selectivity of the isophorone and mesityl oxide reaches 87.8 percent.

Description

technical field [0001] The invention belongs to a catalyst for preparing isophorone by condensation of acetone and a preparation method thereof. Background technique [0002] Isophorone (CAS RN 78-59-1, isophorone, referred to as IP) is an excellent high-boiling solvent and an important raw material in the fine chemical industry. In addition, because isophorone has a conjugated unsaturated ketone structure, its double bonds can be further reacted to obtain alcohols, acids, amines, esters, and isocyanates, which are important chemical intermediates. Isophorone is one of the derivatives of acetone, which is obtained from acetone through condensation, dehydration, Mecheal addition and ring formation. At present, the main manufacturers of isophorone are some large foreign companies, such as: Degussa of Germany, Rohm and Haas of the United States, Dow Chemical Company, BP of Britain, and Dailuo Corporation of Japan. At present, there is no official manufacturer in my country, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02B01J21/10C07C49/603C07C45/72
Inventor 徐贤伦刘艳侠
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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