Continuous stirred tank reactor for aldol condensation reaction

Patent metadata

Field	Value
Publication number	US-12280352-B2
Application number	US-202017767427-A
Country	US
Kind code	B2
Filing date	Aug 5, 2020
Priority date	Oct 8, 2019
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

Provided is a continuous stirred tank reactor for an aldol condensation reaction and an apparatus for an aldol condensation reaction including the same, which prevent a decrease in a conversion rate due to dead zone occurrence even in the case of an increase of an installation scale, have a high output, have a significantly increased reaction surface area during the reaction, suppress layer separation between an aqueous phase and an organic phase, and have a significantly decreased average particle diameter of organic layer particles dispersed in the aqueous phase and a significantly decreased deviation thereof. In addition, a content of the catalyst used per unit yield may be significantly decreased as compared with the conventional reactor and apparatus, and costs required for wastewater treatment may be significantly reduced as compared with the conventional reactor and apparatus.

First claim

The invention claimed is:

1. A continuous stirred tank reactor for an aldol condensation reaction having a bottom-up structure in which a reactant flows from a lower portion into an upper portion, the continuous stirred tank reactor comprising:
a reactant inlet 100 provided in a lower portion of the reactor;
a stirring unit 200 including multi-stage paddles spaced apart from each other in a vertical direction, provided in an upper side of the reactant inlet 100 ; and
an outlet 300 provided in an upper side of the stirring unit 200 ,
wherein the multi-stage paddles are a pitched paddle disposed at a top and a plurality of multi-stage flat paddles disposed in a lower end thereof.

2. The continuous stirred tank reactor for an aldol condensation reaction of claim 1 , wherein
the stirring unit 200 includes a rotating shaft 240 connected to the multi-stage paddle; and
the pitched paddle includes a plurality of pitched blades 210 formed in a state of being twisted at an angle of 20 to 70° in a length direction of the rotating shaft 240 .

3. The continuous stirred tank reactor for an aldol condensation reaction of claim 1 , wherein
the stirring unit 200 includes the rotating shaft 240 connected to the multi-stage paddle; and
the flat paddle includes a plurality of flat blades 220 formed at an angle of −10 to 10° in the length direction of the rotating shaft 240 .

4. The continuous stirred tank reactor for an aldol condensation reaction of claim 1 , further comprising an impingement baffle 400 which is provided in a lower side of a bottom flat paddle among the multi-stage flat paddles and with which a reactant flowing from the inlet 100 collides to be dispersed to an outside of the reactor.

5. The continuous stirred tank reactor for an aldol condensation reaction of claim 1 , wherein
the paddle includes a support 230 for connecting the pitched blade 210 to the rotating shaft 240 , and
a ratio between a width (d) of the pitched blade 210 and a width (D) of an inside of the reactor is 0.2 to 0.4.

6. The continuous stirred tank reactor for an aldol condensation reaction of claim 1 , wherein
the paddle includes a support 230 for connecting the pitched blade 210 to the rotating shaft 240 , and
a ratio between a width (d) of the flat blade 220 and a width (D) of the inside of the reactor is 0.4 to 0.5.

7. The continuous stirred tank reactor for an aldol condensation reaction of claim 1 , wherein
the stirring unit 200 allows the reactant to be dispersed in an aqueous phase at an average particle size of 50 to 500 μm.

8. An apparatus for an aldol condensation reaction comprising the continuous stirred tank reactor for an aldol condensation reaction of claim 1 .

9. The apparatus for an aldol condensation reaction of claim 8 , comprising:
the continuous stirred tank reactor 10 for an aldol condensation reaction;
a plug flow reactor 20 into which a reactant, a catalyst, and a product flow from the continuous stirred tank reactor for an aldol condensation reaction; and
an oil-water separator 30 into which the product and the catalyst flow from the plug flow reactor and which separates the catalyst with an aqueous layer and separates the product with an organic layer.

Assignees

• Hanwha Solutions Corp

Inventors

• Lee Shinbeom
• Jeon Hyojin
• Jeong Gyeongseon
• Han Keedo
• Han Junhee

Classifications

• C07C45/45 Primary

  by condensation · CPC title

• B01J2219/00033

  Continuous processes · CPC title

• B01J19/0066 Primary

  Stirrers (mixing per se B01F) · CPC title

• B01F2215/0422

  Numerical values of angles · CPC title

• B01D17/02

  Separation of non-miscible liquids · CPC title