公开(公告)号：WO2022073853A1

公开(公告)日：2022-04-14

申请号：PCT/EP2021/077012

申请日：2021-09-30

Applicant: INEOS ACETYLS UK LIMITED

Inventor： BRACE, James William

IPC: B01D3/32 ,  B01D3/14

Abstract: The present disclosure relates generally to processes and systems for distillation of acetic acid products. In one aspect, the disclosure provides a process for separating a feed stream comprising acetic acid and propionic acid in a distillation column. The process includes introducing a feed stream into the column through a feed inlet; withdrawing a first product stream comprising acetic acid and propionic acid from a first draw outlet disposed at a level above the level of the feed inlet; and withdrawing a second product stream comprising acetic acid and propionic acid from a second draw outlet disposed at a level between the level of the feed inlet and the level of the first draw outlet. The volume ratio of the first product stream to the second product stream is in the range of 1:9 to 19:1; and the amount of propionic acid present in the second product stream is at least 50 ppmw greater than the amount of propionic acid present in the first product stream.

公开(公告)号：WO2022073855A1

公开(公告)日：2022-04-14

申请号：PCT/EP2021/077018

申请日：2021-09-30

Applicant: INEOS ACETYLS UK LIMITED

Inventor： BRACE, James William

IPC: B01D3/42

Abstract: The present disclosure relates generally to processes and apparatuses for separating an effluent in an acetic acid production unit. Accordingly, one aspect of the disclosure provides a process including introducing a feed stream comprising acetic acid and water into a distillation column through a feed inlet, separating the feed stream to form a water- rich first fraction and an acetic acid-rich second fraction, measuring an internal temperature and an internal pressure of the column at positions between a first outlet and a second outlet of the column, determining a corrected temperature of the column based on the measured internal pressure and internal temperature of the column, adjusting a heating rate of a heat source in thermal communication with a bottom section of the column if the corrected temperature differs from a target value, and then withdrawing at least a portion of the separated acetic acid-rich second fraction, the fraction comprising 500-1,500 ppm water by weight (ppmw).

公开(公告)号：WO2021204585A1

公开(公告)日：2021-10-14

申请号：PCT/EP2021/058199

申请日：2021-03-29

Applicant: INEOS ACETYLS UK LIMITED

Inventor： HENNIGAN, Sean Anthony ,  MULLER, John Peter Eric

IPC: C07C51/12 ,  C07C53/08

Abstract: The present disclosure relates generally to processes and systems for production of acetic acid. In one aspect, the disclosure provides a process for producing acetic acid that includes contacting carbon monoxide and one or more of methanol and reactive derivatives thereof with a carbonylation catalyst in a first reaction zone to produce a product stream, transferring at least a portion of the product stream into a second reaction zone; at a first position between the reaction zone inlet and an outlet of the second reaction zone, introducing a first vapour stream (90-100% CO) to the second reaction zone; at a second position between the reaction zone inlet and the outlet, introducing a second vapour stream the second vapour stream comprising less than 90 wt.% carbon monoxide; and through the outlet, withdrawing an effluent of the second reaction zone.

公开(公告)号：WO2022058189A1

公开(公告)日：2022-03-24

申请号：PCT/EP2021/074458

申请日：2021-09-06

Applicant: INEOS ACETYLS UK LIMITED

Inventor： MULLER, John Peter Eric

IPC: B01D53/14 ,  C07C51/12 ,  C07C53/08

Abstract: The present disclosure relates generally to processes for scrubbing an off-gas stream of an acetic acid production unit. In one aspect, a process includes introducing the off-gas stream to the absorption column; introducing to the absorption column, a methanol stream at a first flow rate, the methanol stream having a first temperature at the liquid inlet, the first temperature being at least 18 °C (e.g., at least 20 °C, or at least 22 °C); in the absorption column, contacting the off-gas stream with the methanol stream; through a liquid outlet of the one or more liquid outlets, withdrawing a first liquid effluent from the absorption column, the first liquid effluent comprising methanol and methyl iodide; and through the vapour outlet, withdrawing a vapour effluent from the absorption column.