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

A technology of isophorone and acetone liquid, applied in the field of post-processing technology of organic synthesis, can solve the problems of significant energy consumption, increase the difficulty of post-processing, quality impact, etc., reduce energy consumption, improve yield, and realize recycling Effect

Active Publication Date: 2022-07-12
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Tray structure of tray column with cylindrical spray hood

[0042] Cylindrical injection element scheme as attached figure 1 and 2 As shown, it includes a lower suction hole 1; a tray 2; an upper suction hole 3; an air riser 4; a spray hole 5; Among them, the gas riser 4 is cylindrical with a diameter of 30mm, installed on the tray 2, 50mm higher than the tray 2, the overflow weir is 80mm high, and the total height of the jet cover is 200mm, installed on the upper part of the gas riser 4, and the whole is also cylindrical The upper suction hole 3 has a constriction toward the inside of the spray cover, and the upper part of the spray cover body 7 is provided with rectangular spray holes 5 that are vertically arranged and parallel to each other. The diameter of the upper part of the spray hood is 60mm, the height of the upper suction center from the tray 2 is 30mm, the diameter of the neck is 45mm, the cross section of the suction hole is rectangular, the width of the ...

Embodiment 2

[0046] The schematic diagram of the liquid phase condensation process of acetone is attached Figure 5 As shown, the acetone and KOH aqueous solution are preheated by the preheater 12 and fully mixed by the mixer 13 and then enter the first reactor 14 and the reactive distillation column 15. The reactive distillation column 15 is operated at 3.0MPa, and the acetone processing capacity is 600kg / h, the catalyst is NaOH, and the concentration is 0.1% of the total reaction liquid mass flow; 30% of the stream from the 15-column still of the reactive distillation column is sent to the isophorone demulsification recovery tower, and the The mass ratio of organic phase and water is 1:1, and the operating pressure of the isophorone demulsification recovery tower is 3.1 MPa. The diameter of the isophorone demulsification recovery tower is 800mm, including 50 trays in the present invention, and each tray is provided with 28 circular spray caps, and the circular spray cap adopts the desig...

Embodiment 3

[0049] The schematic diagram of the liquid phase condensation process of acetone is attached Figure 5 As shown, the acetone and KOH aqueous solution are preheated by the preheater 12 and fully mixed by the mixer 13 and then enter the first reactor 14 and the reactive distillation column 15. The reactive distillation column 15 is operated at 5.0MPa, and the acetone processing capacity is 720kg / h, the catalyst is KOH, and the concentration is 0.05% of the total reaction liquid mass flow; 60% of the stream from the reactive distillation tower tower reactor is sent to the isophorone demulsification recovery tower, and the organic The mass ratio of phase and water is 1:2, and the operating pressure of the isophorone demulsification recovery tower is 5.1 MPa. The diameter of the isophorone demulsification recovery tower is 800mm, including 50 trays of the present invention, each tray is provided with 5 strip-shaped spray caps, and the strip-shaped spray cap adopts the design of th...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/74C07C45/82C07C49/603B01D3/14
CPCC07C45/74C07C45/82B01D3/14C07C2601/16C07C49/603Y02P20/10
Inventor 何岩黎源宋明焱董龙跃田博边路路周锐员玫李浩孟熙张静孙启魁
Owner WANHUA CHEM GRP CO LTD
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