A kind of post-processing technology of isophorone prepared by liquid-phase condensation method of acetone

Abstract

The invention discloses a post-treatment process for preparing isophorone by acetone liquid-phase condensation method. The process includes: extracting a part of the liquid-phase stream of the tower bottom of the reactive distillation column and sending it to the isophorone demulsification recovery tower for disposal, and recovering the isophorone in the stream without additional additives, containing isophorone The top stream of the demulsification tower of phorone is then partially or fully returned to the reactive distillation tower; the isophorone-containing water phase is flashed or distilled to recover isophorone, and the water is returned to the reactive distillation tower for recycling. ; The liquid phase catalyst recovered by flash evaporation or distillation is concentrated and sent back to the reaction unit for recycling. By adopting the process of the invention, the energy consumption can be greatly reduced, the loss of isophorone and the catalyst in the wastewater can be significantly reduced, and the amount of the wastewater can be significantly reduced.

Description

technical field [0001] The invention relates to the field of post-processing techniques for organic synthesis, in particular to a post-processing technique for preparing isophorone by acetone liquid-phase method. Background technique [0002] Isophorone, chemical name: 3,5,5-trimethyl-2-cyclohexen-1-one, English name: Isophorone, molecular formula C 9 H 14 O. Isophorone is one of the important products of acetone deep processing and has a wide range of uses. It has strong dissolving ability, good dispersibility and good leveling, and is an excellent high-boiling green solvent. Due to its structure of conjugated unsaturated ketone, it can further react to obtain important products such as alcohols, acids, amines, esters and isocyanates, especially the downstream derivatives isophorone nitrile (IPN), isophorone diamine ( IPDA), isophorone diisocyanate (IPDI) and oxoisophorone (KIP), so it is of great interest in the fields of specialty amines, polyurethanes and nutritional...

AI Technical Summary

Problems solved by technology

However, the introduction of additional chemical additives increases the difficulty of post-processing, which has a potential impact on catalyst recovery and isophorone product quality, and the energy consumption is significant during low-temperature phase separation.

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