Preparation method of isophorone

Abstract

The invention discloses a preparation method of isophorone. The preparation method comprises the following steps: continuously sending acetone into a first reaction tower to perform a condensation reaction so as to generate a diacetone alcohol mixed solution; enabling the diacetone alcohol mixed solution to flow out of the first reaction tower and then flow into a heat exchanger through a charging pump to heat and perform a diacetone alcohol dehydration reaction so as to generate a mixture of the acetone and mesityl oxide; placing the mixture of the acetone and the mesityl oxide, the remaining diacetone alcohol mixed solution and a catalyst into a second reaction tower together for reaction, cooling a prepared reaction solution, and separating out a gas phase, an oil phase and a water phase, wherein the oil phase is an isophorone synthetic solution; and neutralizing and rectifying the isophorone synthetic solution to get the finished product isophorone. According to the preparation method, the use of solvents is avoided, the reaction process conditions are mild and easy to control, and the product yield is obviously increased in comparison with that of the prior art.

Description

technical field

[0001] The invention belongs to the field of basic chemical industry, in particular to a preparation method of isophorone. Background technique

[0002] Isophorone (Isophorone, ISO) is a condensation product of acetone, its chemical name: 3,5,5-trimethyl-2-cyclohexen-1-one, molecular formula: C9H14O, molecular weight: 138.21, colorless appearance Or light yellow transparent liquid, with high boiling point, low hygroscopicity, good dissolving ability, dispersibility and leveling property, it is a good solvent for polymer materials, and can dissolve nitrocellulose, acrylate, alkyd resin, polyester and epoxy resin etc. Due to its unsaturated structure, the double bond can be further reacted to produce important products such as alcohols, acids, amines, esters and isocyanates, which are widely used in plastics, pesticides, medicines, coatings and other industries. Isocyanate can be obtained from isophorone by addition, hydrogenation and phosgenation, and it is ...

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