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Method For Producing Paraxylene Using A Simulated Moving Bed Step, And A Step Of Fractionating Two Fractions In A Two Section Column
Abstract: The present invention describes a method for obtaining paraxylene from a feedstock containing xylenes, ethylbenzene and C9+ hydrocarbons, said method comprising: - a single simulated moving-bed separation step A implemented with a zeolite as adsorbent and a desorbent and allowing at least three fractions to be obtained, one fraction A1 comprising a mixture of paraxylene and desorbent, two fractions A21, A22 comprising ethylbenzene (EB), orthoxylene (OX) and metaxylene (MX) and desorbent, said step is carried out at a temperature of 20°C to 250°C, under a pressure between the bubble pressure of the xylenes at the operating temperature and 2.0 MPa, and with a volume ratio of the desorbent to the load in the simulated moving-bed separation unit 2 of 0.4 to 2.5; - a step B of fractionation by distillation in a two-section distillation column of fractions A21 and A22 from step A, in which said fractions are injected separately at separate injection points, allowing the production of a fraction B2 containing ethylbenzene, orthoxylene and metaxylene, and a fraction B42 free of aromatic compounds with eight carbon atoms and containing desorbent.
Notices, Deadlines & Correspondence
Patent Information
Applicants
AXENS
Inventors
1. PREVOST, Isabelle
2. PIGOURIER, Jérôme
3. HOTIER, Gérard
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 202047056032-STATEMENT OF UNDERTAKING (FORM 3) [23-12-2020(online)].pdf | 2020-12-23 |
| 2 | 202047056032-PRIORITY DOCUMENTS [23-12-2020(online)].pdf | 2020-12-23 |
| 3 | 202047056032-FORM 1 [23-12-2020(online)].pdf | 2020-12-23 |
| 4 | 202047056032-DRAWINGS [23-12-2020(online)].pdf | 2020-12-23 |
| 5 | 202047056032-DECLARATION OF INVENTORSHIP (FORM 5) [23-12-2020(online)].pdf | 2020-12-23 |
| 6 | 202047056032-COMPLETE SPECIFICATION [23-12-2020(online)].pdf | 2020-12-23 |
| 7 | 202047056032-Proof of Right [26-03-2021(online)].pdf | 2021-03-26 |
| 8 | 202047056032-FORM-26 [26-03-2021(online)].pdf | 2021-03-26 |
| 9 | 202047056032-FORM 3 [02-06-2021(online)].pdf | 2021-06-02 |
| 10 | 202047056032-Correspondence_Form1, Power of Attorney_08-09-2021.pdf | 2021-09-08 |
| 11 | 202047056032.pdf | 2021-10-18 |
| 12 | 202047056032-FORM 18 [03-06-2022(online)].pdf | 2022-06-03 |
| 13 | 202047056032-FER.pdf | 2022-06-14 |
| 14 | 202047056032-Information under section 8(2) [12-12-2022(online)].pdf | 2022-12-12 |
| 15 | 202047056032-FER_SER_REPLY [12-12-2022(online)].pdf | 2022-12-12 |
| 16 | 202047056032-CLAIMS [12-12-2022(online)].pdf | 2022-12-12 |
| 17 | 202047056032-PatentCertificate11-01-2023.pdf | 2023-01-11 |
| 18 | 202047056032-IntimationOfGrant11-01-2023.pdf | 2023-01-11 |
Search Strategy
| 1 | search(3)E_10-06-2022.pdf |