US 12,454,504 B2
Process for the recovery of a light boiler and a heavy boiler from a vapor stream
Thorsten Merker, Erftstadt (DE); and Christoph Hiller, Duelmen (DE)
Assigned to Evonik Operations GmbH, Essen (DE)
Appl. No. 18/256,136
Filed by Evonik Operations GmbH, Essen (DE)
PCT Filed Dec. 13, 2021, PCT No. PCT/EP2021/085344
§ 371(c)(1), (2) Date Jun. 6, 2023,
PCT Pub. No. WO2022/128834, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 20215567 (EP), filed on Dec. 18, 2020.
Prior Publication US 2024/0034710 A1, Feb. 1, 2024
Int. Cl. C07C 51/44 (2006.01); B01D 3/14 (2006.01); B01D 3/32 (2006.01); B01D 3/34 (2006.01); C07C 45/82 (2006.01)
CPC C07C 51/44 (2013.01) [B01D 3/143 (2013.01); B01D 3/32 (2013.01); B01D 3/346 (2013.01); C07C 45/82 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A process for recovery of a light boiler and a heavy boiler from a vapor stream, comprising:
A1) introducing a vapor stream (1) comprising a light boiler and a heavy boiler into a column (2) at a point at the bottom of the column,
A2) withdrawing a vapor stream (3), enriched in the light boiler, from the top of the column (2),
A3) withdrawing a liquid stream (4), enriched in the heavy boiler, from the bottom of the column (2), and splitting the stream (4) into a partial stream (5) and a partial stream (6), enriched in the heavy boiler,
A4) recycling the partial stream (5) back into the column (2) at a point above the bottom of the column, wherein the partial stream (5) is not cooled during the recycling,
A5) withdrawing a stream (7), enriched in a middle boiler, from a middle section of the column (2) and splitting the stream (7) into a partial stream (8) and a partial stream (9),
A6) cooling the partial stream (9) in a heat exchanger (10) to provide a cooled stream (11) and recycling the cooled stream (11) as stream (12) back into the column (2) at an introduction point below the top of said column, and
A7) withdrawing a volume of the partial stream (6) and withdrawing a volume of the partial stream (8),
wherein the volume of the partial stream (8) withdrawn is equal to the volume of the partial stream (6) withdrawn and the flow of partial stream (5) is maintained.