Heterogeneous catalytic method for synthesis of isophorone from acetone

Abstract

The invention relates to a heterogeneous catalytic method for synthesis of isophorone from acetone. Acetone is used as a raw material, and a magnesium-aluminum composite oxide is used as a catalyst for carrying out catalytic synthesis to obtain isophorone; the magnesium-aluminum composite oxide comprises MgO, Al2O3 and MgAl2O4, the molar ratio of magnesium to aluminum is 0.3-3, the specific surface area is 80-150m<2> / g, and the pore volume is 0.2-0.3cm<3> / g; a fixed bed reactor is used for carrying out synthetic reaction, 20ml of 20 to 40-mesh catalyst is added into a stainless steel reactor of which the inner diameter is 10mm, the reactor is heated to the reaction temperature from the room temperature at the rate of 10 DED C / min after being qualified through an air-tight test, and then, the analytically pure acetone raw material is injected into the reactor by a duplex plunger pump through a preheater; the reaction temperature is 220-290 DEG C; the reaction pressure is normal pressure; and the air speed of the acetone liquid is 0.1-1.0 / h, the selectivity reaches 94.5%, the conversion rate reaches 44.8%, and the stability reaches 1000 hours.

Description

technical field [0001] The invention relates to the technical field of green and clean catalysis, and specifically refers to a heterogeneous catalytic method for synthesizing isophorone from acetone, wherein magnesium-aluminum composite oxide is used as a catalyst, and acetone gas-solid multiphase is carried out under mild reaction conditions Catalyzes condensation reactions. Background technique [0002] As one of the deep-processing products of acetone, isophorone has developed rapidly in developed countries such as the United States, Britain, Germany, and Japan. With the rapid development of the chemical industry, especially the synthetic resin industry, the demand for isophorone is also increasing rapidly. In the late 1980s and early 1990s, many foreign countries built or expanded isophorone production facilities. At present, the production and consumption of isophorone are mainly concentrated in western developed countries and regions. The main manufacturers are Rohm a...

AI Technical Summary

Problems solved by technology

Although the acetone gas-solid multiphase condensation method has many advantages, according to the current research results, the developed catalyst has disadvantages such as relatively complicated preparation process, high cost, short life, difficult regeneration and low isophorone selectivity.

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