Disclosed is a dividing wall column for preparing high-purity 2-ethylhexyl-acrylate, and a method for distilling 2-ethylhexyl-acrylate. The dividing wall column provides an effect having two distillation columns through one distillation column, thereby having an effect of reducing energy compared to the conventional processing device in preparing high-purity 2-ethylhexyl-acrylate and an effect of reducing equipment costs of the device.

Claims

10 · 1 independent · depth 2

10 granted claims

›1.independentA dividing wall column comprising a main column comprising: a condenser;na reboiler; anda dividing wall,wherein the main column is divided into a top …+9

›2.↳ 1The dividing wall column of claim 1, wherein a low boiling component flows out in the top zone, a high boiling component B flows out in the bottom zon…d2

›3.↳ 1The dividing wall column of claim 1, wherein the feed has a 2-ethylhexyl-acrylate content greater than or equal to 80 wt %.d2

›4.↳ 1The dividing wall column of claim 1, wherein the number of plates provided in each of the top zone, the upper outflow zone, the lower inflow zone, the…d2

›5.↳ 1The dividing wall column of claim 1, wherein a length of the dividing wall is determined according to the number of plates included in the upper inflo…d2

›6.↳ 1The dividing wall column of claim 1, wherein a length of the dividing wall ranges from 40 to 85% of a total theoretical plate number of the top zone, …d2

›7.↳ 1The dividing wall column of claim 1, wherein a temperature of the top zone ranges from a lower temperature limit T1a to an upper temperature limit T2a…d2

›8.↳ 1The dividing wall column of claim 1, wherein a temperature of the bottom zone ranges from a lower temperature limit T1b to an upper temperature limit …d2

›9.↳ 1The dividing wall column of claim 1, wherein a temperature of an outflow middle plate which is provided at a position where the upper outflow zone and…d2

›10.↳ 1A method for preparing 2-ethylhexyl-acrylate using the dividing wall column of claim 1, comprising feeding the feed containing crude 2-ethylhexyl acry…d2

Classifications

6 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B01D3/14

Section C — Chemistry; metallurgy

C07C67/54

USPC · US Patent Classification

202/161202/158202/262560/129

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1.3 y

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Type	Document	Date
related publication	US 20130284586 A1	31 Oct 2013

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