DIVIDED WALL DISTILLATION COLUMN (As Amended)

Patent metadata

Field	Value
Publication number	US-2016193540-A1
Application number	US-201414905245-A
Country	US
Kind code	A1
Filing date	Jul 18, 2014
Priority date	Jul 18, 2013
Publication date	Jul 7, 2016
Grant date	—

Abstract

Provided are a divided wall distillation column and a separating method. According to the divided wall distillation column and the separating method, when a mixture having three or more components is separated, a material to be separated, for example, 2-ethyl hexyl acrylate can be separated with high purity, and energy reduction in a separation and refinement process of 2-ethyl hexyl acrylate can be promoted.

First claim

1 . A divided wall distillation column comprising a first condenser, a second condenser, a reboiler, and a distillation column provided with a divided wall,
wherein the divided wall distillation column is divided by the divided wall into a first area and a second area that are divided by the divided wall and a third area in which the divided wall is not placed and which is formed at bottom of the first area and the second area, a raw material is introduced into the first area, and the introduced raw material is divided into a first outflow stream discharged from an upper part of the first area, a second outflow stream that is discharged from a lower part of the first area, passes through the third area, is introduced into the second area and is discharged from an upper part of the second area, and a third outflow stream discharged from a lower part of the third area, and a part or an entire flow of the first outflow stream and a part or an entire flow the second outflow stream respectively passes through the first condenser and the second condenser and is fed back to the upper part of the first area and the upper part of the second area, and a part of the third outflow stream or an entire third outflow stream passes through the reboiler and is fed back to the lower part of the third area.

2 . The divided wall distillation column of claim 1 , wherein the raw material comprises a compound of the following Formula 1:

in Formula 1,
R 1 is hydrogen or an alkyl group having 1 to 10 carbon atoms, and R 2 is a linear or branched form alkyl group having 1 to 24 carbon atoms.

3 . (canceled)

4 . The divided wall distillation column of claim 1 , wherein the raw material is introduced into the lower part of the first area.

5 - 10 . (canceled)

11 . The divided wall distillation column of claim 1 , further comprising a heater that preheats the raw material before the raw material is introduced.

12 . The divided wall distillation column of claim 1 , further comprising a first heat exchanger that is disposed at a front end of the first condenser for heat-exchanging with raw material and the first outflow stream.

13 . The divided wall distillation column of claim 1 , further comprising a second heat exchanger that is disposed at a front end of the second condenser for heat-exchanging with the raw material and the second outflow stream.

14 - 15 . (canceled)

16 . The divided wall distillation column of claim 1 , wherein the first area comprises a raw material inflow part, a first upper product outflow part, and a first upper reflux inflow part, and the second area comprises a second upper product outflow part and a second upper reflux inflow part, and the third area comprises a third lower product outflow part and a third lower reflux inflow part, and
the raw material is introduced into the raw material inflow part, and the first outflow stream is discharged from the first upper product outflow part, and the second outflow stream is discharged from the second upper product outflow part, and the third outflow stream is discharged from the third lower product outflow part, and a part of the first outflow stream or an entire first outflow stream is introduced into the first upper reflux inflow part, and a part of the second outflow stream or an entire second outflow stream is introduced into the second upper reflux inflow part, and a part of the third outflow stream or an entire third outflow stream is introduced into the third lower reflux inflow part, and one or more of the raw material inflow part, the first upper reflux inflow part, the second upper reflux inflow part, and the third lower reflux inflow part are formed as two or more openings placed to be spaced apart from each other.

17 . The divided wall distillation column of claim 16 , wherein the first area comprises two or more first small areas in which a horizontal cross-sectional area of the distillation column is equally divided, and one or more of the raw material inflow part and the first upper reflux inflow part are formed as two or more openings placed to be spaced apart from each other, and two or more openings are respectively placed in two or more first small areas.

18 . The divided wall distillation column of claim 17 , wherein the first upper reflux inflow part is formed as two or more openings placed to be spaced apart from each other, and two or more openings are placed at a same stage in the first area.

19 . The divided wall distillation column of claim 17 , wherein the raw material inflow part is formed as two or more openings placed to be spaced apart from each other, and two or more openings are placed at a same stage in the first area.

20 . The divided wall distillation column of claim 16 , wherein the second area comprises two or more second small areas in which the horizontal cross-sectional area of the distillation column is equally divided, and the second upper reflux inflow part is formed as two or more openings placed to be spaced apart from each other, and two or more openings are respectively placed in two or more second small areas.

21 . The divided wall distillation column of claim 20 , wherein two or more openings are placed at a same stage in the second area.

22 . The divided wall distillation column of claim 16 , wherein the third area comprises two or more third small areas in which the horizontal cross-sectional area of the distillation column is equally divided, and the third lower reflux inflow part is formed as two or more openings placed to be spaced apart from each other, and two or more openings are respectively placed in two or more third small areas.

23 . The divided wall distillation column of claim 22 , wherein the third lower reflux inflow part is formed as two or more openings placed to be spaced apart from each other, and two or more openings are placed at a same stage in the third area.

24 . A method of separating a raw material using a manufacturing apparatus comprising a condenser, a reboiler, and a distillation column provided with a divided wall that is in contact with a column top of the distillation column and is spaced apart from a column bottom of the distillation column and the distillation column is divided into a first area and a second area divided by the divided wall and a third area in which the divided wall is not placed and which is disposed at bottom of the first area and the second area, the method comprising introducing the raw material into a first area and refining the raw material.

25 . The method of claim 24 , wherein the raw material comprises a compound of the following Formula 1:

in Formula 1,
R 1 is hydrogen or an alkyl group having 1 to 10 carbon atoms, and R 2 is a linear or branched form alkyl group of having 1 to 24 carbon atoms.

26 . (canceled)

27 . The method of claim 24 , further comprising preheating the raw material before the raw material is introduced into the distillation column.

28 . The method of claim 27 , wherein the raw material is heated using a heater.

29 . The method of claim 27 , wherein a flow of an upper part of the first area of the distillation column exchanges heat with the raw material using a heat exchanger.

30 . The method of clai

Assignees

• Lg Chemical Ltd

Inventors

• Lee Sung Kyu
• Shin Joon Ho
• Kim Sung Kyun
• Lee Jong Ku

Classifications

• B01D3/141 Primary

  where at least one distillation column contains at least one dividing wall · CPC title

• B01D3/143

  by two or more of a fractionation, separation or rectification step · CPC title

• C07C69/54

  Acrylic acid esters; Methacrylic acid esters · CPC title

• B01D3/14

  Fractional distillation {or use of a fractionation or rectification column} · CPC title

• B01D3/008

  Liquid distribution · CPC title