Production technology for isophorone

Abstract

The invention relates to a production technology for isophorone which belongs to an unsaturated compound with a keto group as a constituent part of the six-membered ring. The production technology comprises the steps: introducing acetone subjected to vaporization and heating into a fixed bed reactor loaded with an alkali catalyst for a condensation reaction with a reaction temperature of 200-350 DEG C and a reaction pressure of 100-500 KPa, wherein the fixed bed reactor is filled with the alkali catalyst, the reaction products is a mixture mainly comprising water, mesityl oxide, mesityl oxide isomer, mesitylene, isophorone and a tetramer product; placing the reaction product obtained in acetone condensation polymerization after acetone is recovered in a cutting tower to cut isophorone, the tetramer product and light components in the reaction product, to obtain heavy components from the bottom of the tower, making the heavy components enter into a refining tower with a side line by a self-compaction mode, and drawing the product isophorone with a mass percent concentration of more than 99% from the side line of the refining tower. The production technology of the invention overcomes the disadvantages in the prior art of high production cost, easily-caused auto-agglutination problem and high energy consumption.

Description

technical field [0001] The technical scheme of the present invention relates to an unsaturated compound with a keto group as a component of a six-membered ring, specifically a production process for isophorone. Background technique [0002] Isophorone is a very important high-boiling solvent, which can be miscible with most organic solvents, and is also used in the production of polyurethane, coatings, pharmaceuticals, elastomers and adhesives. [0003] The existing production methods of isophorone include: one is to prepare isophorone through cyclization and hydrolysis with mesityl oxide and ethyl acetoacetate under the action of a catalyst. This process is carried out under normal pressure and low temperature. Although the condition is mild and the operation is simple, it is difficult to popularize due to the high price of raw materials and high production cost. It is generally only suitable for a small amount of preparation in the laboratory; the second is the method for ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: to provide the production process of isophorone, first the raw material acetone is vaporized through a vaporization tower, then the acetone gas is heated to the reaction temperature with a heater, and then passed into a fixed-bed reactor equipped with a catalyst , the product after the reaction recovers acetone through double-effect evaporation, recycles it, and separates the by-product from the isophorone through the product cutting tower, light removal tower and refining tower in turn, thereby overcoming the high production cost and easy Disadvantages of causing self-aggregation problems and high energy consumption

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