TH18115B - Aceotropic distillation process - Google Patents

Abstract

DC60 (25/04/40) Distillation process The beam of washing is obtained from an aziotropic distillation column and consists of The substances in the process, idro-carbon and aliphatic acids (such as n-propyl acetate, xylene and acetic acid respectively) are processed and the separation column is used to achieve This results in the separation of process substances and hydrocarbons to make process substances. It can be recycled to an aceotropic distillation column. Distillation process The beam of washing is obtained from an aziotropic distillation column and consists of The idro carbon and aliphatic acids (such as n-propyl acetate, xylene and acetic acid respectively) are put into the process and the separation column is used to achieve This results in the separation of process substances and hydrocarbons to make process substances. It can be recycled to an aceotropic distillation column.

Claims (9)

1. The process for the azotropic distillation of the water from the jet stream at Contains acetic acid And hydrocarbons Which can be oxidized to produce aromatic poly-carboxylic acids using alkyl acetates selected from isobutyl acetate and n- Propyl acetate is a process agent for producing bottom products that contain Acetic acid with water in that amount Lower in the beam of the spray It is characterized by the washing beam (12) containing hydrocarbons, acetic acid, process substances. And the water is drawn from the aziotropic zone in the column of distillation (10) and taken to the separation column (16) with an additional source of selected water (20) being performed. To produce both hydrocarbon-based bottom products (24) and top products (22) with process substances. And the substances in the process were returned Come to the aziotropic area in the column of distillation 2. The process as in claim 1, where hydrocarbons are paraxylene 3. The process, as in claim 2, also features a spray tube containing acetic acid, water, process substances. And the substrate was imported into the aziotropic column (10) at the location above the lower limit of the aziotropic region. And the rinsing (12) is drawn from the aziotropic column (10) in the region of where the stream was brought in. 4. Process as in claim 3, where the pull point of the wash beam (12) is positioned above the input point of the spray beam. 5. Process as in claim 3 or claim 4, where the body of the spray, which is under An aziotropic distillation containing 20% excess water. 6. Process, as in any of the clauses 3 to 5, where Bottom Products (24) obtained from the Aceotropic distillation column (10) is free from the process substance. And contains Water content within the range of 2 to 12% by weight compared to the combined weight of aliphatic carboxylic acid and water in bottom products (24). 7. The process, as in any of the clauses 3 to 6, where the water content of the The spray, which is under an azotropic distillation containing 20 to 40% water by weight versus the combined weight of acetic acid. And the water in the stream of the spray 8. Process As in claim 7, where an aziotropic distillation column (10) is used with a single-phase organic reflux consisting of alkyl-aci process substances. The said state 9. The process, as in any of the previous claims, also features functionality. Separation column (16) to form a temperature frame along the length of the column with the first azimuth. Of low temperature at high position in column, second high temperature azimuth at low position in column And increasing the temperature expansion from the aforementioned horizontal plane to the base of the separation column.